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# OAR Box 1190 Prepped by Candice Davis



## Document

Number: 

# 46 ) ll-A-3 8

Docket Number: 

# A-90-2 8

Printed 5/5/2008 9:13:51 AM

Sheet 46 of 106P. 2 1

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# -/Mo-ay

MAI L OU T #95-0 3 " " 

### Stat e o f Californi a AI RRESOURCE

S BOAR D Notic e o f Public Availabilit

y o f Modifie dTex t AMENDMENTS T

O REGULATIONS REGARDIN GON-BOAR

D DIAGNOSTI

C SYSTE M REQUIREMENTS FO

R1994 AN

D LATE RPASSENGE

RCARS , LIGHT-DUT

Y TRUCKS , AN D MEDIUM-DUT

Y VEHICLES AN

D ENGINES (OB D II )
Public Hearing Date : Decembe r 8 , 199 4 Publi c Availabilit

y Date : Januar

y 19 , 1995 Deadline fo

r Publi c Comment : Februar y 3 , 1995

At apubli c hearing hel donDecembe r 8 , 1994 , the Ai

r Resource s Boar

d(th e "Board" ) considere damendments t

o California' s On-Boar

dDiagnostic II (OB D II ) regulatio n(Section 1968.1 , Titl e 1,3, Californi aCod e o f Regulation s ("CCR"))

. The propose damendment s would improv e the overal

l effectivenes s o

f th e OBD II requirements while addressin g implementationconcern s expressedb y manufacturers

. The Boar dadoptedResolution94-67 approving the proposedamendments wit h modifications

. Th

e modification s mad

e b y th e Boar dprio r t o adoptin g th e Resolutio nar

e summarizedbelow

. Section(b) ( 1.2.2

) wa s modifie

db y the Boar dto reduc e the 199 8 an

d1999 model yea

r phase-i npercentage s fo

r the low emissio

nvehicle catalys t

monitoring requirements

. Wit hth e modification , manufacturers mus t certif y 3 0 percen

t of it s low emissio

nvehicle application s t

o the 1.5 time s th

e standar demissionthresholdfo

r the 199 8 mode

l year, an d6 0 percent fo r th e 199 9 mode

l year . Th

e percentage s propose

db y the staf f wer e 40 an d70 percent , respectively

. The Boar dmodifiedthe implementationdate s fo r th e phase-ino

f evaporativ e syste

m lea k detectionstrategie s capabl e o f detectin g leaks as smal

l as the equivalen

t o f a0.020 inc

h diamete r hole

. Section(b)(4.2.2 ) ha s bee nmodifie dt o dela y initia l introductionof

suc h system s fro

mthe 199 8 model yea

r t o th e 2000 model year . The projecte dsale s volume phase-i npercentage s wouldb e 5 0 percen t wit hthe 2000 mode

l year , 75 percen

t fo r 2001 , an d 10 0 percent compliance fo

r the 2002 mode

l year . Smal

l volum e manufacturers woul dnot b e require dt o mee t th e 2000 an d200 1 mode

l yea r phase-inpercentages

. The Boar ddirectedthe staf

f t o modif y th e requirement s fo

r comprehensive componen t monitoring (section(b)(10 ) ofth e regulation) t o requir e illuminationofth e MalfunctionP. 3



### Indicator Light (MIL) onl

y fo r affecte dcomponent s an

dsystem s tha

t ca ncaus e emission s t

o increas e by mor

e tha n1 5 percent

o f th e FT Pstandard

. Section(b)(10.4 ) ha s bee nmodifie dt

o stat e tha t manufacturers shall

^ b e requiredonl

y to stor e afaul t code , an dno t t o illuminate the MIL , fo r affectedcomponent s an

dsystems tha

t couldnot caus e sucha

nemissionincrease

. However , i f

a nelectroni c componen

t o r syste mi s usedas par

t o f the diagnosti c strateg y to satisf y anothe r monitoring requirement , MI Lilluminatio nwouldcontinu e t o be require dfo

r thos e component s an

dsystem s inorde

r t o ensur e tha t the vehicl e operator

i s alerte dto malfunction s tha

t impai r the functiono

f the OB D II system

. I nadditio nt

o thes e modifications , the staf f ha s proposedothe

r mino r modification s t

o the OB D I I regulatio nt

o furthe r addres s manufacturers concern s andfo r clarity : Sectio n(a)(2.2 ) ha s beenmodifiedwit hrespec t t o the requirement s fo

r clearin g the OB D II readines s cod

e whendisabling monitoring system s inrespons e t o the activatio no f

a Powe r Take-Of f (PTO ) unit

. The sectionwouldrequir e tha t the readines s cod

e b e cleare d (i.e. , all bit s set

t o "test no t complete" ) while the PTO unit i s active

. Once the PT O uni t i s de-activated , the readines s code ca nbe restoredt

o the stat e tha t existedprior

t o activation

. Sectio n(b)(1.1.2 ) ha s beenmodifiedto allo w manufacturer s of spark-ignite dlean-bu m engine s to reques t

Executiv e Office

r approva l fo r exemptionfro

mthe OB D II catalys t monitoring requirement s if the manufacture

r ca ndemonstrat

e tha t technology i s no t

availabl e tha t woul dallo w fo

r reliabl e monitoring of

the catalys t

system

. A footnot e has beenaddedt

o section(b) ( 1.2.1 ) t

o clarif y tha t i ninstance s where the malfunctioncriteri ai s t

o b e basedo

nthe applicabl e emissionstandards , th e certificatio n reactivit y adjustmen

t facto r shall be appliedwit

hrespec t t o hydrocarbo nemission s o nlo w emissionvehicl e applications

. Sectio n(b)(3.2)(B ) ha s beenmodifiedto remove a nunnecessar

y restrictio no nthe establishmen

t of the malfunctioncriteri afo r misfir e monitoring

. Wit

hthe modification , manufacturer s wouldbe permitted , bu t not required , t

o us e the datafro

masingle durabilit

y demonstratio nvehicle fo

r all engine s tha

t hav e th e sam

e numbe r of cylinder s as the demonstratio nvehicle

. The titl e fo

r section(g) , an

dsection(g)(1.0 ) itself

have beenmodifiedt

o furthe r mak e clea r tha t the demonstratio nrequirement s d o not appl y solel y t o engine familie s fo

r whic ha Durabilit y Demonstratio nVehicl e (DDV) i s available

. Similarly , insection(g)(4.5 ) the ter m "DDV " ha s beenreplacedby "vehicle. " Sectio n(g)(2.6.1 ) ha s beenmodifiedto clarif y the catalys t

monitoring demonstratio n requirement s fo

r non-lo w emissio nvehicles

. Consisten t wit hthe monitoring requirement s fo r

: 

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# iP. 4



### suc hvehicles , the modificationmake s clea r tha t th e baseline emissiontest

i s t o b e conducted wit harepresentativ e 400 0 mile catalyst svstem

. Section(g)(3.0 ) has* bee

nmodifie dt o furthe r clarif y tha t fo r successfu l completiono

f OB D II demonstrations , manufacturers shal l no t requir e th e demonstrationvehicl e to b e col d soakedprior

t o running preconditioning cycles

. Section(m)(5.1 ) ha s bee

nmodifie dt o clarif y tha t the implementationrequirement s specifiedi nthe sectionapply t

o alternat e fue l engine s as well as vehicles

. Resolution94-6 7 an

dthe tex t o f Section1968.1 , Titl e 13 , as modified , ar e attached

. Comments regarding the modification s t o Section1968. 1 must

b e submittedt

o the Boar

d Secretary , Ai

r Resource s Board , P.O

. Bo x 2815 , Sacramento , Californi a95812 , no later tha n Februar y 3 , 1995 , fo

r considerationb

y the Executive Officer

. Question s regarding thi s mail

ou t ma y b e directedt

o AllenLyons , Ai

r Resource s Enginee

r Associate , a

t (818 ) '575-6833

. Sincerely ,

K

. D

. Drachand , Chie

f Attachment s



# 3P. 5

Stat e o f Ca l iforni a AI RRESOURCE S BOAR D Resolutio n94-6 7
Decembe r 8 , 199 4 Agend a Item No. : 94-12- 2

WHEREAS , section s 3900 2 and3900 3 o f th e Healt handSafet y Cod e charg e th e Boar dwit hth e responsibilit y fo r systematicall y attackin g th e seriou s ai r pollutio nproble m

cause dby

moto r vehicles ;
WHEREAS , section s 3960 0 and3960 1 o f th e Healt handSafet y cod e authoriz e th e Boar dt o adop t standards , rule s andregulation s andt o d o suc hact s a s ma y b e necessar y

fo r th e prope r executio no f th e power s anddutie s grante d t o andimpose dupo nth e Boar db y law ;
WHEREAS , insectio n4300 0 o f th e Healt han dSafet y

Code , th e Legislatur e ha s declare dtha t th e emissio no f ai r pollutant s from moto r vehicle s i s th e primar y caus e o f ai r pollutio ni nman y part s o f th e state ;
WHEREAS , insectio n43000. 5 o f th e Healt han dSafet y

Code , th e Legislatur e foun dan ddeclare dthat , despit e significan t reduction s i nvehicl e emission s inrecen t years , continue dgrowt hinpopulatio nandvehicl e mile s travele d throughou t Californi a hav e th e potentia l no t onl y t o preven t attainmen t o f th e stat e standards , bu t insom e cases , t o resul t inworsenin g o f ai r quality ;
WHEREAS , sectio n4300 4 provide s tha t unles s expressl y exempted , th e exhaus t emission s fo r gasoline-powere dmoto r vehicle s shal l appl y t o moto r vehicle s whic hhav e bee nmodifie do r altere dt o us e a fue l othe r tha ngasolin e o r diesel ;
WHEREAS , sectio n4300 6 provide s tha t th e AR B ma y certif y

th e fue l syste m

o f an y moto r vehicl e powere dby a fue l othe r tha ngasolin e o r diese l whic h meet s th e standard s specifie db y sectio n4300 4 andadopttes t procedure s fo r suc hcertification ;
WHEREAS , sectio n4301 3 o f th e Healt handSafet y Cod e authorize s th e Boar dt o adop t moto r vehicl e emissio nstandard s andin-us e performanc e standard s whic hi t find s t o b e necessary , cost-effective , andtechnologicall y feasible ;
WHEREAS , sectio n4301 8 o f th e Healt handSafet y Cod e direct s th e Boar dt o achiev e th e maximu m degre e o f emission s reduction s possibl e from vehicula r an dothe r mobil e source s inorde r t o accomplis hth e attainmen t o f stat e standard s a t th e earlies t possibl e date ;
WHEREAS , section s 3951 5 and3951 6 o f th e Healt han dSafet y

Cod e provid e tha t th e Boar dma y

delegat e an y

dut y t o th e Executiv e Office r whic hth e Boar d deem s appropriat e andtha t an y power , duty , purpose , function , o r 

# iP. 6
Resolutio n94-67 .
jurisdictio nwhic hth e Boar dma y lawfull y

delegat e shal l be conclusivel y presume dt o hav e bee ndelegate dt o th e Executiv e Office r unles s th e Boar d ha s expressl y

reserve dsuc hauthorit y ont o itself ;
WHEREAS , i nJul y

1990,_th e Boar dadopte dan dth e Offic e o f Administrativ e La w subsequentl y

approve dregulation s regardin g "Malfunctio nan dDiagnosti c Syste m Requirements—199 4 an dSubsequen t Model-Yea r Passenge r Cars , Light Dut y Trucks , an

dMedium-Dut y

Vehicle s an

dEngines, " (OB DII) , whic har e codifie da t Titl e 13 , CCR , sectio n1968.1 , an dwhic hse t fort hrequirement s fo r monitorin g catalys t efficiency , engin e misfire , evaporativ e syste m integrity , secondar y ai r injection , an dchlorofluorocarbo n(CFC ) containment ; fo r improvin g curren t monitorin g o f th e fue l system , oxyge n sensor , EG Rsystem , andothe r emission-relate dcomponent s o f th e on-boar d diagnosti c system ; an dfo r standardizin g faul t codes , diagnosti c repai r equipment , th e vehicl e connecto r use dfo r attachin g th e repai r equipmen t t o th e vehicle , an

dth e protoco l fo r downloadin g repai r informatio ni norde r t o improv e th e effectivenes s o f emissio ncontro l syste m repairs ;
Whereas , th e Boar dadopte damendment s t o th e OB DI I regulation s in199 1 an d 1993 , an dth e amendment s wer e approve dby th e Offic e o f Administrativ e Law ;
WHEREAS , th e staf f ha s no w propose dadoptio no f additiona l amendment s t o Titl e 13 , CCR , sectio n1968.1 , that , amon g othe r things , woul dprovid e manufacturer s wit hadditiona l guidanc e and/o r flexibilit y i nimplementin g an dcomplyin g wit hth e malfunctio nanddiagnosti c requirement s o f th e regulations , includin g catalys t monitoring , misfir e detection , tampe r resistance , an

dapplicabilit y

o f th e regulation s t o vehicle s an dengine s tha t us e diese l an

dalternat e fuels' , an dwoul drequir e manufacturer s t o develo pmonitorin g strategie s capabl e o f detectin g evaporativ e syste m leak s a s smal l a s th e equivalen t o f a 0.02 0 inc hdiamete r orifice .
WHEREAS , th e staf f ha s furthe r propose dtha t Titl e 13 , CCR , sectio n1968. 1 b e amende dt o provid e th e Executiv e Office r wit hauthorit y t o certif y

1996 - 200 0 mode l yea r vehicle s require dt o compl y wit hth e malfunctio nand diagnosti c requirement s o f th e section , bu t d o no t full y mee t th e minimu m requirement s i

non e o r mor e areas , provide dtha t th e manufacturer s o f suc h vehicle s insom e case s pa y a fin e fo r suc hnonconformanc e pursuan t t o sectio n4301 6 o f th e Californi a Healt han dSafet y

Code ;
WHEREAS , th e staf f ha s furthe r propose damendment s t o Titl e 13 , CCR , section s 203 0 an

d203 1 andth e incorporate d"Californi a Certificatio nand Installatio nProcedure s fo r Alternativ e Fue l Retrofi t system s fo r Moto r Vehicle s Certifie dfo r 199 4 an dSubsequen t Mode l Years " t o allow alternativ e fue l retrofi t system manufacturer s t o disabl e specifi c on-boar ddiagnosti c monitorin g strategie s throug hth e 199 8 mode l year ;
WHEREAS , th e Californi a Environmenta l Qualit y Ac t an dBoar dregulation s requir e tha t n o projec t whic hma y hav e significan t advers e environmenta l impact s ma y

b e adopte da s originall y propose di f feasibl e alternative s o r mitigatio nmeasure s ar e availabl e t o reduc e o r eliminat e suc himpacts ;
WHEREAS , pursuan t t o sectio n43013(e ) o f th e Healt handSafet y Code , th e Boar dha s considere dth e effect s o f th e propose damendment s t o th e regulation s o nth e econom y o f th e state ; 

# sP. 7

' vResolutio n 94-6 7 

### -3 -

WHEREAS , a publi c hearin g an dothe r administrativ e proceeding s hav e bee n hel di naccordanc e wit hth e provision s o f Chapte r 3. 5 (commencin g wit h Sectio n11340) , Par t 1 , Divisio n3 , Titl e 2 o f th e Governmen t Code ;
WHEREAS , th e Boar dfind s that :

T o date , mor e tha n3 5 engin e familie s hav e bee n certifie da s meetin g th e OB D I I requirement s fo r th e applicabl e mode l years ;
Th e propose damendment s t o Titl e 13 , CCR , sectio n1968.. 1 shoul dhel pmanufacturer s continu e t o b e abl e t o certif y system s infutur e mode l year s by clarifyin g requirement s andb y makin g mino r adjustment s t o th e regulatio nbase d ontechnica l andpractica l experienc e gaine dt o date , whic hshoul deas e th e burden s manufacturer s fac e i n developin g OB D I I system s tha t compl y wit hthes e regulations ; Significan t number s o f vehicle s continu e t o operat e wit h deteriorate dcatalyti c converter s an dtha t catalys t performanc e i s crucia l t o maintainin g vehicl e emission s i ncomplianc e wit hth e applicabl e standards ; accordingly , i t continue s t o b e necessar y t o monito r catalys t performance ; however , suc hmonitorin g ca nb e don e b y evaluatin g malfunctio ncriteri a base do n tailpip e emissio nlevels ;
In-us e surveillanc e program s indicat e tha t evaporativ e syste m leak s a s smal l a s 0.02 0 inche s indiamete r occu r o na significan t numbe r o f in-us e vehicle s causin g exces s evaporativ e emissions , and , therefore , evaporativ e monitorin g system s tha t ca ndetec t leak s o f thi s size , a s wel l a s othe r malfunctions , shoul d significantl y

reduc e in-us e evaporativ e emission s from vehicles ;
Th e monitorin g o f misfir e ove r th e ful l engin e operatin g rang e i s necessar y

becaus e misfir e contribute s substantiall y

t o exces s emission s andca ncaus e catalys t overheatin g an dfailure ;
O ndiese l fuele dvehicles , th e los s o f compressio no r othe r malfunction s tha t preven t combustio ninon e o r mor e cylinder s andfue l syste m malfunction s caus e exces s emissions ; monitorin g system s tha t detec t suc h malfunction s shoul dsignificantl y reduc e suc hemission s fro m diese l fuele dvehicles ;
Manufacturer s o f alternativ e fue l vehicle s an d alternativ e fue l retrofi t system s requir e additiona l leadtim e t o investigat e th e effect s o f alternat e fuel s o ncomponen t performanc e an ddurabilit y befor e ful l implementatio no f reliabl e OB D I I system s o nthes e vehicle s ca ntak e place ; 

# CP. 8

Resolutio n94-6 7 - -4 -

Th e propose damendment s shoul dmaximiz e th e long-ter m effectivenes s o f th e OB D I I regulation s by restructurin g an denhancin g curren t monitorin g requirement s base don th e lates t improvement s i nmonitorin g technologies ;
Th e propose damendment s woul denabl e manufacturer s tha t hav e bee nunabl e to develo pa full y complyin g OB D I I system , despit e goo dfait hefforts , t o certif y suc h system s conditionally , throug hth e 200 0 mode l year , upo n paymen t o f a penalt y i nsome cases ;
Th e propose damendment s to Titl e 13 , CCR , sectio n1968. 1 ar e necessary , cost-effective , an dtechnologicall y feasibl e to carr y

ou t th e purpose s o f th e Californi a Clea nAi r Act ; an

d
Th e propose damendment s t o Titl e 13 , CCR , sectio n 1968.1 , do no t affec t th e Board' s earlie r finding s tha t th e ful l implementatio no f th e regulatio nwil l resul t in emissio nreduction s tha t wil l hel pattai nan dmaintai n nationa l andai r qualit y standard s fo r ozone , carbo n monoxid e andnitroge ndioxide ;
WHEREAS , th e Boar dha s determined , i naccordanc e wit hth e Californi a Environmenta l Qualit y Ac t an dBoar dregulations , tha t th e propose d amendment s to Titl e 13 , CCR , sectio n1968.1 , tha t provid e tha t manufacturer s ma y elec t t o phase-i nth e monitorin g o f misfir e detectio nove r th e ful l rang e o f operatin g condition s ove r a fou r yea r perio dan dtha t manufacturer s ma y

b e permitte dt o certif y non-full y

complian t OB D I I systems , ma y

hav e som e short-term advers e environmenta l impact s i nrelatio n t o th e regulation s presentl y i neffect ; however , overridin g consideration s exis t fo r adoptio no f th e propose damendments :

Titl e 13 , CCR , sectio n1968.1(b)(3.3 ) presentl y provide s tha t fo r 199 7 andlate r mode l yea r vehicles , misfir e shal l b e monitore dcontinuousl y andunde r al l positiv e torqu e engin e speed s an dconditions ; however , staf f ha s determined , an dth e Boar dfinds , tha t som e engin e an d drivelin e characteristics , especiall y a s the y

appl y t o engine s .wit h1 0 o r 1 2 cylinders , stil l preclud e reliabl e misfir e monitorin g ove r th e ful l rang e o f operatin g conditions ;
N o equall y

effectiv e alternativ e method s fo r misfir e monitorin g hav e bee nidentifie dtha t woul db e cost effectiv e andtechnologicall y feasibl e fo r implementatio nb y

th e 199 7 mode l year . Stric t enforcemen t o f th e existin g regulation s coul d resul t insevera l engine s no t bein g abl e t o b e certifie d an davailabl e fo r sal e i nCalifornia ; accordingly , amendment s hav e bee npropose dto permi t manufacturer s t o



# 1Resolutio n94-6 7 

### -5 -
phase-i nth e full-rang e misfir e requiremen t ove r fou r years , beginnin g wit hth e 199 7 mode l year ; Th e propose damendment s t o Titl e 13 , CCR , sectio n 1968.l(m ) would , enabl e manufacturer s tha t hav e bee n unabl e t o develo pfull y complyin g OB DI I systems , despit e goo dfait hefforts , t o certif y suc hsystem s conditionally , throug hth e 200 0 mode l year ; Theoretically , allowin g vehicle s t o b e certifieddurin g th e phase-i nperio deve nthoug hthe y canno t b e monitore d ove r th e ful l rang e o f operatin g condition s coul d preven t th e prope r an dimmediat e repai r o f emissio n contro l system s o f suc hvehicle s andcoul dresul t i na possibl e increas e i nemissions ;
However , suc hvehicles , eve nwit hth e potentia l monitorin g syste m

deficiencie s tha t hav e bee n identified , wil l b e significantl y mor e effectiv e in reducin g in-us e vehicl e emission s tha nmalfunctio nan d diagnosti c system s tha t compl y wit hpre-OB DI I syste m requirements ;
Th e certificatio nq f suc hvehicle s woul dminimiz e economi c hardshi pfo r vehicl e manufacturers , distributor s o f suc hvehicle s withi nCalifornia , an d woul dminimiz e any

resultin g impac t onvehicl e availabilit y

an dcost s fo r consumers ;

WHEREAS , th e Boar dha s determined , i naccordanc e wit hth e Californi a Environmenta l Qualit y Ac t andBoar dregulations , tha t th e propose d amendment s t o Titl e 13 , CCR , section s 2230-223 1 wil l no t hav e significan t advers e environmenta l impacts ;

r NOW , THEREFORE , B E I T RESOLVE Dtha t th e Boar dhereb y approve s fo r adoption , wit hmodification , th e amendment s t o section s 1968. 1 and2230-2231 , Titl e 13 , Californi a Cod e o f Regulation s andth e document s incorporate dtherein , whic hwer e mad e availabl e fo r publi c commen t inMail-Ou t 94-3 8 andar e se t fort hinAttachmen t A . Th e modification s t o th e languag e o f Attachmen t A ar e se t fort hinAttachmen t B .
B E I T FURTHE RRESOLVE Dtha t th e Boar ddirect s th e Executiv e Office r t o adop t Sectio n1968.1 , Titl e 13 , Californi a Cod e o f Regulations , afte r makin g th e modifie dregulator y languag e an

dadditiona l supportin g document s an d informatio navailabl e fo r publi c commen t fo r a perio do f 1 5 days , provide d tha t th e Executiv e Office r shal l conside r suc hwritte ncomment s regardin g th e modificatio nandadditiona l supportin g document s an dinformatio na s ma y be submitte ddurin g thi s period , shal l mak e modification s a s ma y b e appropriat e inligh t o f th e comment s received , andshal l presen t th e



# r_^__

_P.1 0 

### Resolutio n"94-6 7 -6 - _'
* — 

### regulation s t o th e Boar dfo r furthe r consideratio ni f h e determine s tha t thi s i s warranted ;
B E I T FURTHE RRESOLVE Dtha t th e Boar dhereb y determine s tha t pursuan t t o sectio n209(b ) o f th e Clea nAi r Ac t th e regulation s adopte dherei nwil l no t caus e Californi a moto r vehicl e emissio nstandards , inth e aggregate , t o b e les s protectiv e o f publi c healt han dwelfar e tha napplicabl e federa l standards , andwil l no t caus e th e Californi a requirement s t o be inconsisten t wit hsectio n202(a ) o f th e Clea nAi r Act ;
B E I T FURTHE RRESOLVE Dtha t th e Executiv e Office r shall , upo nadoption , forwar dth e amende dsubsection s t o Titl e 13 , CCR , sectio n1968.1 , t o th e Administrato r o f th e Environmenta l Protectio nAgenc y wit ha reques t fo r a waive r o f federa l preemptio npursuan t t o sectio n-209(b ) o f th e Clea nAi r Act ;
B E I T FURTHE RRESOLVE Dtha t th e Boar ddirect s th e staf f t o continu e t o closel y monito r vehicl e manufacturer s i ncomplyin g wit hth e requirement s o f sectio n1968.1 , Titl e 13 , CCR , an dt o repor t t o th e Boar di n199 6 i f furthe r amendment s t o th e regulation s ar e necessar y fo r futur e mode l yea r vehicles .

I hereb y certif y

tha t th e abov e i s a tru e an

dcorrec t cop y

o f Resolutio n94-6 7 a s adopte dby ' th e Ai r Resource s Board . 

# 9& ;afes w Pa t Hutchens , Boar dSecretar y



# ?P.1 1



### Modification s t

o Section1968.1 , Title , 13 , Californi aCod e o f Regulation s Thes e ar e amendments to section1968.1 , Titl e 13 , CCR

. Amendments adoptedb y the Boar d onDecembe

r 8 , 199 4 ar e s"how ni nunderline to indicat

e addition s an

dstrikeout

to indicate deletions

. Amendments noticedfo r commen t betwee nJanuar y 1 9 an dFebruar y 3 , 1995 , ar

e indicatedb

y doubl e underline fo

r addition s an

ditalics with strikeout

t o indicat e deletions

.



## 'Z >1968. 1 Malfunctio n an d Diagnosti cSyste m Requirements-199 4 an d Subsequen t Model-Yea r Passenge rCars , Light-Dut yTrucks , an d Medium-Dut yVehicle s an d Engine s
(a ) GENERA L REQUIREMENT S (1.0 ) Al l 199 4 an d subsequen t model-yea rpassenge rcars , light-dut ytrucks , an d medium-dut yvehicle s shal l b e equippe d wit h a malfunctio n indicato rligh t (MIL ) locate d o n th e instrumen t pane l tha t wil l automaticall yinfor m th e vehicl e operato ri n th e even t o f a malfunctio n o f an ypowertrai n component s whic h ca n affec t emission s an d whic h provid e inpu t to , o rreceiv e output from , th e on-boar d computer(s ) o ro fth e malfunctio n ofth e on-boar d computer(s ) itself

. Th e MI L shal l no t b e use d fo ran y othe rpurpose

. (1.1 ) Th e MI L shal l b e o f sufficien t illuminatio n an d locatio n t o b e readil yvisibl e unde ral l lightin g conditions

. Th e MI L shal l illuminat e i n th e engine-ru n ke ypositio n befor e

_engin e crankin g t o indicat e tha t th e MI L i s functiona l an d shall , whe n illuminated , ' displa yth e phras e "Chec k Engine " o r"Servic e Engin e Soon"

. Th e wor d "Powertrain " ma yb e substitute d fo r"Engine " i n th e previou s phrases

. Alternatively , th e International Standard s Organizatio n (ISO ) engin e symbo l ma vb e substitute d fo rth e wor d "Engine. " (1.2 ) Al l 199 4 an d subsequen t model-yea rpassenge rcars , light-dut ytrucks , an d medium-dut yvehicle s require d t o hav e MI L pursuan t t o (1.0 ) abov e shal l als o b e equippe d wit h a n on-boar d diagnosti csyste m capabl e o f identifyin g th e likel yare a o f th e malfunctio n b ymean s of faul t code s store d i n compute rmemory

. Thes e vehicle s , shal l b e equippe d wit h a standardize d electrica l connecto rt o provid e acces s t o th e store d faul t codes

. Specifi cperformanc e requirement s ar e liste d below

. Aglossar yo f term s i s containe d i n subsectio n (n) 1 a t th e en d o f thi s section

. (1.3 ) An yreferenc e t o vehicle s i n thi s regulatio n shal l als o includ e medium-dut yvehicle s wit h engine s certifie d o n a n engin e dynamometer

. {44)—Manufacturer s o f diese l engine s utilizin g computer-base d electroni cpowertrai n contro l system s shal l submi t a pla n fo rcomplyin g wit h thes e requirements

- t o th e Executiv e Office rfo rapprova l a t leas t tw o year s prio rt o certification

. Th e pla n shal l b e approve d base d o n monitorin g al l powertrai n component s whic h ca n affec t emission s an d fo rv/hic h reliabl e monitorin g technique s ar e availabl e at cost s comparabl e t o othe rengine s meetin g thes e requirements , an d o n meetin g al l otho rapplicabl e requirement s (e.g. , storin g freez e fram e conditions , meetin g standardizatio n requirements , etc.)

.

1 Unles s otherwis e noted , al l sectio n reference s ar e containe d withi n thi s subsectio n o f Titl e 13 , CCR

. 1

...'• ' / /P.1 3



### (1.S4) Fo rLo

wEmissio n Vehicle s (LEV) , th e Executive Office rshal l revis e th e emissio n threshol d fo ra malfunctio n o n an ychec k i f th e most reliabl e monitorin g metho d develope d require s a highe rthreshol d t o preven t significan t error s of commissio n i n detectin g a malfunction

. ( 1 .§5 ) Fo rever

ycas e i n whic h a malfunctio n i s t o b e note d whe n a n emissio n threshol d i s exceede d (e.g. , emission s i n exces s of 1. 5 time s th e standard) , th e manufacture rma y perfor m onl ya functiona l chec k (define d i n sectio n (n)(16.0) ) of a specifi ccomponen t o rsyste m i f deterioratio n o rfailure of suc h woul d not caus e th e vehicle' s emission s t o excee d th e emissio n threshold

. (1.76 ) Afte rth e 199 8 mode l year , fo rNon-LEVs , fulfillmen t of federa l On-Boar d Diagnosti c (OBD ) requirement s shal l be deeme d t o b e a n acceptabl e optio n fo rth e manufacture r fo rth e purpos e o f meetin g thes e requirements

. (1.87 ) Fo r199 4 an d 199 5 mode l year s only , illuminatio n ofth e malfunctio n indicato rligh t upo n detectio n o f a malfunctio n shal l b e optiona l fo rcatalyst , misfire , an d complet e evaporativ e syste m monitoring

. MI L illuminatio n fo rsuc h vehicle s shal l b e optiona l fo r othe rmonitorin g requirements , subjec t t o Executive Office rapproval , o n th e basi s of us e of a ne

wmonitorin g strateg ywhic h i s significantl ydifferen t tha n that use d previousl yb yth e manufacture rand/o rwhic h entail s a hig h degre e ofsophisticatio n i n it s application

. Irrespectiv e of th e precedin g th e MI L shal l illuminat e o n thes e vehicle s i n accordanc e wit h sectio n 1968. 1 fo rlac k offunctio n (se e sectio n (n)(16.0) ) fo r electroni ccomponents/system s otherwis e approve d fo rnot illuminatin g th e MIL

. Furthermore , settin g faul t code s fo ral l malfunction s shal l continu e t o confor m wit h requirement s of sectio n 1968.1

. Fo rcomponents/system s not requirin g illuminatio n of th e MIL , manufacturers shal l provid e a pla n fo rapprova l b yth e Executive Office rfo r reportin g o n th e correct performance o f th e monitorin g system s i n custome rus e at 6 mont h interval s beginnin g fro m th e star t of productio n eac h yea rfo ra t leas t th e firs t thre e year

s afte rproduction

. Approva l of th e pla n shal l b e base d o n obtainin g a statisticall yvali d sampl e size , assurin g that adequat e resource s ar e availabl e t o investigat e th e potentia l problems , an d assurin g tha t a wid e variet yof vehicles , operatin g modes , an d mileag e accumulatio n wil l b e include d i n th e evaluation

. Shoul d incorrec t performanc e o f th e diagnosti csyste m b e determine d b yth e Executiv e Office r o n th e basi s of thes e report s o rthroug h othe rmeans , manufacturer s shal l recal l th e vehicle s fo rcorrectio n ofth e OB D I I syste m i n accordanc e wit h Articl e 2.2 , Titl e 1 3 CCR , o rtheyshal l submi t a n altemat e pla n fo rremedyin g th e proble m fo rapprova l b y th e Executive Office ro n th e basi s o f achievin g comparabl e capture rate s an d timelines s as a n officia l recal l plan

. (1.98 ) Manufacturers ma yemployaltemat e statistica l MI L illuminatio n an d faul t cod e storag e protocol s t o thos e specifie d i n thes e requirements , subjec t t o Executive Office r approva l base d o n comparabl e timelines s i n detectin g a malfunctio n an d evaluatin g syste m performance

. Fo rstrategie s requirin g o n averaq e betwee n thre e an d si x drivin g cycle s fo rMI L illumination , th e manufacture rshal l provid e data and/o ra n engineerin g evaluatio n whic h adequatel ydemonstrat e tha t th e monitorin g svste m i s equall yeffectiv e an d timel yi n detectin g componen t deterioration

. Strategie s requirin g o n averag e mor

e tha n si xdrivin g cycle s fo rMI L illuminatio n shal l no t b e accepted

.

/_2

_P. M

(1.9 ) Regardin g diagnosti csvste m monitorin g condition s an d MI L illuminatio n requirements , manufacturer s ar e generall yrequire d t o defin e appropriat e operatin g condition s fo r monitoring , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a t leas t onc e durin g th e firs t engin e start portio n o f th e applicabl e
• Federa l Tes t Procedur e (FTP ) test

. Upo n detectio n o fa malfunction , th e MI L i s t o b e illuminate d an d a faul t cod e store d n o late rtha n th e en d o fth e next drivin g cycl e durin g whic h monitorin g occurs provide d th e malfunctio n i s agai n detected

. Unti l th e 199 7 mode l year , diagnosti cstrategie s tha t illuminat e th e MI L o n th e basi s o f completin g a tri p (tri p i s define d i n sectio n (n)(16.0 ) o f thes e requirements ) shal l b e accepted

. Whe n a tri p criterio n i s employed , upo n detectio n o fa malfunction , th e diagnosti csvste m shal l stor e a faul t cod e an d th e MI L shal l b e illuminate d n o late r tha n th e en d o f th e next tri o i f th e malfunctio n i s agai n present

. (2.0 ) Manufacturer s ma vreques t Executiv e Office rapprova l t o disabl e a diagnosti csyste m designe d t o mee t th e requirement s o fsectio n (b ) at ambien t engin e startin g temperature s belo wtwent ydegree s Fahrenheit , an d a t elevation s abov e eigh t thousan d fee t abov e se a leve l provide d th e manufacture rsubmit s dat a and/o ra n engineerin g evaluatio n whic h adeguatel ydemonstrat e tha t monitorin g woul d b e unreliabl e whe n suc h condition s exist

. Notwithstanding , diagnosti csyste m disablemen t ma vb e regueste d at othe rambien t engin e startin g temperature s i f th e manufacture radeguatel ydemonstrate s wit h dat a and/o ra n engineerin g evaluatio n tha t misdiagnosi s woul d occu rdu e t o th e impact o f suc h ambien t temperature s o n th e performanc e o f th e componen t itsel f (e.g. , componen t freezing)

. (2.1 ) Manufacturer s ma vdisabl e monitorin g system s tha t ca n b e affecte d b yrunnin g ou t o f fue l (e.g.

. misfir e detection ) whe n th e fue l leve l i s low , provide d disablemen t wil l no t occu rwhe n th e fue l leve l i s abov e 1 5 percen t o fth e nomina l capacit yo f th e fue l tank

. (2.2 ) Fo rvehicle s designe d t o accommodat e th e installatio n o fPowe rTake-Of f(PTO ) unit s (define d i n sectio n (n)(19.0))

. disablemen t o faffecte d monitorin g system s i s permitte d provide d disablemen t occurs onl vwhil e th e PT O uni t i s active , an d provide d th e OB D I I readines s cod e (specifie d i n sectio n (e) ) i s cleare d b yth e on-boar d compute r(i.e.

. al l bit s shal l b e se t t o "tes t no t complete" ) whil e th e PT O uni t i s activated

. Th e cod e ma yb e restore d t o it s stat e prio rt o PT O activatio n upon

. PT O de-activation , upon activation

of tho PTO unit.
(b ) MONITORIN G REQUIREMENT S (1.0 ) CATALYS TMONITORIN G (1.1 ) Requirement : (1.1.1 ) LEVs : Th e diagnosti csyste m shal l individuall ymonito rth e fron t catalys t o r catalyst s (i.o. , an ycatalyot(s ) whic h receiv e engin e ou t untreate d exhaus t gas) , excep t tha t fron t catalyst s mayb e monitore d i n combinatio n wit h th e nex t catalys t downstrea m i f i t ca n b e demonstrate d tha t a malfunctio n wil l b e indicate d whe n th e fron t catalys t i s alcn o malfunctionin g (se e "(b ) (1.2.1))

. Catalyst s arrange d i n

. " 3P.1 5



### paralle l wit h th o sam e inlet an d outle t i n a singl e exhaus t pip e shal l b e considere d a s on e catalyst

. Aseparat e catalyst incorporate d i n serie s int o th e sam e containo ras a fron t catalys t shal l b e considere d a downstrea m catalyst

. Th e diaqnostic'svste m shal l monito rth e catalvs t svste m fo rprope rperformance

. (1.1.2 ) I f th e fron t catalys t i s a smal l volum e catalys t (se e (b)(1.2.2)) , th e diagnosti c syste m shal l als o monito rth e nex t catalys t downstrea m of th e smal l volum e catalys t eithe rindependentl yof , o r(i f th e condition s i n sectio n (1.1.1 ) are met) i n combinatio n with , th e smal l volum e catalyst

. (1.1.3 ) Manufacturers ma ysubmi t othe rmonitorin g strategies , subjec t t o Executiv e Office rapproval , base d o n equa l timelines s an d reliabilityi n detectin g a catalys t malfunctio n as thes e requirements

. (1.1.4 ) Non-LEVs : Th e diagnosti csyste m shal l monito rth e oatalyst syste m fo rprope r performance

. (1.1.2 ) Manufacturer

s are not require d t o implemen t thes e catalvs t monitorin g requirement s o n diese l vehicle s an d engines

. Further , manufacturers of spark

ignite d lean-bur n vehicle s an d engine s ma yrequest tha t th e Executiv e Office r exempt suc h application s fro m thes e catalvs t monitorin g requirement s i f i t ca n b e demonstrate d tha t a reliabl e monitorin g technolog yi s nq t available

. Th e Executive Office rshal l approve suc h a request upo n determinin g tha t al l reasonabl e monitorin g technologie s have bee n considere d t o th e exten t possible

. (1.2 ) Malfunctio n Criteria : (1.2.1 ) Lo

wEmissio n Vehicle s (se e sectio n (n)(14.0)) : Eac h monitore d catalyst , o r combinatio n of catalysts , shal l b e considere d malfunctionin g whe n averag e Federa l Tes t Procedure (FTP ) tota l hydrocarbo n (HC ) conversio n efficienc yfall s betwee n 5 0 t o 6 0 percent

. Th e efficienc ydeterminatio n shal l b e base d o n a n FT P tes t wherei n a malfunctio n i s note d whe n th e cumulative tota l H C emission s measure d at th e outle t ofth e monitore d catalyst(s ) i s mor e tha n 4 0 t o 5 0 percen t of th e cumulativ e tota l engin e ou t omission s measure d a t th e inle t ofth e Gatalyst(s)

. I n addition , i f a fron t catalys t i s monitore d i n combinatio n wit h a downstrea m oatalyst , th e fron t oatalyst shal l b e considere d malfunctionin g whe n it s efficienc

yha s deteriorate d betwee n 4 0 t o 5 0 peroen t fro m it s 400 0 mil e averag e FT P tota l H C efficiency

. Th e catalvs t svste m shal l b e considere d malfunctionin g whe n its conversio n capabilitydecrease s t o th e poin t tha t eithe rof th e followin g occurs : 1 ) Hydrocarbo n (HC ) emission s excee d th e applicabl e emissio n threshold 2 

### specifie d i n sectio n (b)(1.2.2 ) below , o r2 ) th e averaq e Federa l Tes t Procedure (FTP ) Non-Methan e Hydrocarbo n (NMHC ) conversio n

2 

### Whe n relate d t o emissio n standards , th e malfunctio n criteri a shal l b e base d o n th e emissio n standard s t o whic h th e vehicl e i s certified

. Fo rlo wemissio n vehicl e applications , hydrocarbo n emission s shal l b e multiplie d b vth e certificatio n reactivityadjustmen t facto rfo r th e vehicle

. 

# 4

1P.1 6

efficienc yo f th e monitore d portio n o fth e catalvs t svste m fall s belo w5 0 percent
Regardin g th e secon d criterion , th e efficiencydeterminatio n shal l b e base d o n a n FT P tes t wherei n a malfunctio n i s note d whe n th e cumulativ e NMH C emission s measure d a t th e outle t o f th e monitore d catalyst(s ) ar e mor e tha n 5 0 percen t o f th e cumulativ e enoine-ou t emission s measure d a t th e inle t o f th e catalyst(s)

. (1.2.2 ) TLE V application s shal l emplo ya n emissio n threshol d malfunctio n criterio n o f 2. 0 time s th e applicabl e FT P H C standard plu s th e emission s fro m a tes t ru n wit h a representativ e 400 0 mil e catalvs t syste m (12 5 hour s o foperatio n fo rmedium-dut v vehicle s wit h enqine s certifie d o n a n engin e dynamometer)

. Th e emissio n threshol d criterio n fo rLE V application s shal l b e 2. 5 time s th e applicabl e FT P H C standar d plu s th e emissio n leve l wit h a representativ e 400 0 mil e catalys t system

. Notwithstanding , beginnin g wit h th e 199 8 mode l vear , manufacturer s shal l phas e i n a n emissio n threshol d o f 1. 5 time s th e applicabl e FT P H C standar d fo ral l categorie s o f lo wemissio n vehicles , whic h shal l no t includ e th e emissio n leve l wit h a 400 0 mil e catalvs t system

. Th e phas e i n percentage s (base d o n th e manufacturer' s projecte d sale s volum e fo rlo wemissio n vehicl e applications ) shal l equa l o rexcee d 40

3 0 percen t i n th e 199 8 mode l vear , -7 0 6 0 percen t i n th e 199 9 mode l vear , wit h 10 0 percen t implementatio n fo rth e 200 0 mode l year

. ULE V application s shal l compl ywit h th e 1. 5 time s th e standar d emissio n threshold , an d shal l b e include d i n th e phase-i n percentage s specifie d above : however , prio rt o th e 199 8 mode l year , th e Executiv e Office rshal l revis e th e emissio n threshol d fo r suc h vehicle s i f th e manufacture rsubmit s dat a and/o ra n engineerin g evaluatio n whic h adequatel ydemonstrat e tha t substantia l vehicl e bod yand/o rcatalvs t syste m modification s woul d b e necessaryfo rthi s threshol d t o b e met

. (1.2.2 ) Fo rLEVs , eac h smal l volum e catalys t (i.e. , thos e designe d wit h a conversio n efficienc yto o lo wt o b e practicall ymonitore d fo r5 0 t o 6 0 percen t averag e FT P tota l H C efficiency ) monitore d independentl yshal l b e considere d malfunctionin g whe n it s averdg e FT P conversio n efficiencyha s deteriorate d bybetwee n 4 0 t o 5 0 peroen t fro m it s 400 0 mil e conversio n efficiency

. (1.2.3 ) Non-Lo wEmissio n Vehicles : Th e catalys t syste m shal l b e considere d malfunctionin g whe n it s conversio n capabilit ydecrease s t o th e poin t tha t H C emissions increas e bymor e tha n 1. 5 time s th e standar d ove ra n FT P tes t fro m a tes t ru n wit h a representativ e 400 0 mil e catalys t system

. (1.2.4 ) Fo r199 4 an d 199 5 mode l yea rvehicle s an d enqine s LEV s an d No n LEVs

. a s a n optio n t o monitorin g th e catalys t durin g FT P drivin g conditions , manufacturer s maymonito rth e fron t catalys t independentl yof , o ri n combinatio n with , th e nex t catalys t downstream

. Eac h monitore d catalys t o rcatalys t combinatio n shal l b e considere d malfunctionin g whe n tota l H C conversio n efficiencyfall s belo w6 0 percen t whil e i n norma l close d loo p operation

. A s a guideline , th e catalyst(s ) shoul d no t b e considere d malfunctionin g whe n it s efficiencyi s greate rtha n 8 0 percent

. Th e efficiencydeterminatio n shal l b e base d o n a stead ystat e tes t wherei n a malfunctio n i s note d whe n th e tota l H C emissio n concentratio n measure d a t th e outle t o fth e monitore d catalyst(s ) i s mor e tha n 2 0 t o 4 0 percen t o f th e cumulativ e tota l engine-ou t emission s measure d at th e inle t o f th e



## . . " /ST "

### catalyst(s)

. Alternatively , i f correlatio n wit h FT P emission s ca n b e demonstrated ,

manufacturers ma

yuse

. th e malfunctio n criteri a specifie d i n (b)(1.2.1 ) o r (b)(1.2.3)

. 199 4 an d 1995 mode l yea rvehicle s certifie d t o thi s optio n shal l incorporat e FT P base d monitorin g n o late rtha n th e 199 7 mode l yea r(vehicle s initiall ycomplyin g wit h sectio n 1968. 1 i n th e 199 6 mode l yea rshal l utiliz e a n FT P base d catalys t monitorin g system)

. (1.3 ) Monitorin g Conditions : (1.3.1 ) Acatalys t monitorin g chec k shal l occu ra

t least once pe rtri p excop t fo rvehicle s utilizin g stead ystat o monitoring , whic h shal l compl ywit h sectio n (1.3.2)

. "Trip " i c define d i n sectio n (n ) (5.0)

. Thi s tri p definitio n applie s throughou t sectio n 1968.1

. Th e manufacture rshal l defin e appropriat e operatin g condition s durin g whic h monitorin g shal l occur , subjec t t o th e limitatio n that th e monitorin g condition s shal l b e encountere d at least once durin g th e firs t engin e star t portio n of th e applicabl e FT P test

. However , vehicle s utilizin g stead ystat e monitorin g (as permitte d b y sectio n (1.2.3 ) above) , ma yalternativel ycompl ywit h th e monitorin g condition s specifie d i n sectio n (1.3.2)

. Th e monitorin g svste m shal l operat e a t leas t onc e pe rdrivin g cycl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met

.

(1.3.2 ) I f stead ystat e efficienc yi s bein g monitore d (se e sectio n (b ) (1.2.4)) , th e manufacture rshal l choos e a non-close d throttle , reasonabl ystead yspee d conditio n fo rmonitorin g th e catalys t wit h th e constraint s that th e chec k shal l (i ) occu rbetwee n 2 0 mp h an d 5 0 mph , o rwithi n a n engin e rp m an d torqu e rang e determine d b

yth e manufacture rt o b e representative of medium-dut yvehicl e Operatin g condition s betwee n 2 0 an d 5 0 mp h stead yspee d condition s wit h a loa d equivalen t t o 5 0 percen t o f th e maximu m loa d carryin g capacity , (ii ) tak e n o mor e tha n a 2 0 secon d interva l t o determin e bot h that th e vehicl e i s operatin g i n a prope rwindo wt o perfor m th e chec k an d t o actuall yperfor m th e check , an d (iii ) b e conducte d at th e earliest suc h conditio n encountere d afte rth e beginnin g of closed-loo p operatio n fo reac h drivin g cycle

. Performanc e of th e chec k ma yb e delaye d afte rengin e startu p unti l stabilize d coolan t temperature i s achieve d and/o ra suitabl e cumulative tim e interva l of non-close d throttl e vehicl e operatio n has elapse d t o ensure th e catalys t i s warmed-u p fo rproperi yperformin g th e monitorin g check

. Th e specifie d cumulative tim e interva l shal l begi n fro m th e firs t non-close d throttl e operatio n eithe rafte rachievin g a stabilize d coolan t temperature o rafte rengin e startin g an d shal l not excee d 18 0 seconds

. Thes e monitorin g constraint s an d condition s ma yb e altered , subjec

t t o Executiv e Office r Approval

. Suc h approva l shal l b e grante d i f th e manufacture rsubmit s dat a an d a n engineerin g evaluatio n justifyin g th e nee d fo rth e exceptio n an d demonstrate s that th e requeste d alteratio n woul d yiel d improve d catalys t monitoring

. "Reasonabl ysteady " spee d interva l i n thi s instanc e mean s a 2 0 secon d perio d where al l acceleration s an d deceleration s are of a n averag e magnitud e equivalen t t o 0. 5 mph/secon d o rles s ove ran ytwo secon d interva l durin g thi s period

. Th e



# If-P.1 8

manufacture rma yabort th e chec k i f th e engin e operatin g condition s chang e durin g th e chec k

s o tha t th e vehicl e exceed s th e spee d o r acceleration/deceleratio n tolerance s befor e th e en d o fth e checkin g interval

. Th e manufacture rma ybas e performanc e ofth e catalys t chec k upo n engin e RP M an d loa d condition s equivalen t t o th e abov e monitorin g conditions

. I fa manufacture r develop s a mean s o f monitorin g catalys t efficienc ywhic h canno t utiliz e a stead y stat e monitorin g perio d (e.g. , examinin g tim e vs

. temperatur e durin g catalys t warmup) , i t ma ypresen t a monitorin g proposa l t o th e Executiv e Office rfo r approva l base d o n equivalen t accurac yan d timelines s a s th e stead ystat e monitorin g protoco l i n detectin g a malfunctionin g catalyst

.
(1.4 ) MI L Illuminatio n an d Faul t Cod e Storage : (1.4.1 ) Excep t a s note d below , upo n detectio n o fa catalys t malfunction , th e diagnosti c syste m shal l stor e a faul t ood o an d th e MI L shal l b e illuminate d n o late rtha n th e en d o f th e nex t tri p i f th e malfunctio n i s agai n present , upo n detectio n o f a catalys t malfunction , th e MI L shal l illuminat e an d a faul t cod e store d n o late rtha n th e en d o f th e nex t drivin g cvcl e durin g whic h monitorin g occur s provide d th e malfunctio n i s agai n present

. (1.4.2 ) Fo rstead ystat e catalys t efficienc ychecks , upo n detectio n o fcatalys t efficienc y belo w6 0 percent , th e diagnosti csyste m mayperfor m u p t o tw o successiv e monitorin g check s prio rt o informin g th e vehicl e operato ro fa malfunction

. Thes e monitorin g check s nee d no t occu ro n th e sam e drivin g cycle , bu t shal l b e performe d a s soo n a s prope rmonitorin g condition s occur

. I f catalys t efficienc y remain s belo w6 0 percen t fo rth e thre e sequentia l checks , a faul t cod e shal l b e store d an d th e MI L shal l the n b e activated

. / (1.4.3 ) Th e diagnosti csyste m shal l temporaril ydisabl e catalys t monitorin g whe n a malfunctio n exist s whic h coul d affec t th e prope revaluatio n o f catalys t efficiency

. (1.4.4 ) Th e monitorin g metho d fo rth e catalyst(s ) shal l b e capabl e o fdetectin g whe n a catalys t troubl e cod e ha s bee n cleare d (excep t diagnosti csyste m self-clearing) , • bu t th e catalys t ha s no t bee n replace d (e.g. , catalys t overtemperatur e approache s mayno t b e acceptable)

. (2.0 ) HEATE D CATALYS TMONITORIN G (2.1 ) Requirement : (2.1.1 ) Th e diagnosti csyste m shal l monitor.al l heate d catalys t system s fo rprope r heating

. (2.1.2 ) I n additio n t o th e no n heato d catalys t requirement s i n sectio n (b ) (1) , th e H C conversio n efficienc yof al l hoote d catalyst s shal l eac h b e monitored

. Manufacturer s ma ymonito rheate d catalyst s i n combinatio n wit h anothe rcatalys t i f i t ca n b o demonstrate d tha t a malfunctio n wil l b e indicate d whe n th e heato d



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. 1 9



### catalys t i s malfunctioning

. Otherwise , th e heate d catalys t shal l b e monitore d independently

. I f a heate d catalyst i s a smal l volum e fron t oatalyst , th e diagnosti c syste m shal l alco monito rth e nox t catalyst downstrea m eithe rindependentl yof , o r(i f th e conditions-abov e ar e met) i n combinatio n with , th e smal l volum e heate d catalyst.

- Th e efficienc

yo f heate d catalyst s shal l b e monitore d i n conjunctio n wit h th e reguirement s of sectio n (b)(1)

. (2.2 ) Malfunctio n Criteria : (2.2.1 ) Pre-Star

t Heate d Catalyst Systems : Th e syste m shal l b e considere d malfunctionin g whe n th e designate d pre-star t catalys t temperature i s not attaine d before engin e starting

. (2.2.24 ) After-Star

t Heate d Catalyst System s Th e catalvs t heatin g syste m shal l b e considere d malfunctionin g whe n th e catalyst doe s not reac h it s designate d heatin g temperatur e withi n a requisit e tim e perio d afte rengin e starting ; Th e tim e perio d is-t o b e determine d b yth e manufacture rsubjec t t o th e requiremen t that th e syste m shal l detec t a heatin g syste m malfunctio n causin g emission s fro m a vehicl e equippe d wit h th e heate d catalys t syste m t o excee d 1. 5 time s an yofth e applicabl e FT P standards

. (2.2.32 ) Manufacturers usin g othe rheatin g o rmonitorin g strategie s ma ysubmi t a n alternat e pla n fo rapprova l b yth e Executive Office rt o monito rheate d catalys t system s base d o n comparabl e reliabilityan d timelines s t o thes e requirement s i n detectin g a catalys t heatin g malfunction

. (2.2.4 ) Except as note d i n sectio n (b) (1.2.4) , th e diagnosti csyste m shal l us e th e malfunctio n criteri a specifie d i n sectio n (b)(1.2.1 ) o rcoctio n (b) (1.2.2) , whicheve r i s applicable , whe n monitorin g th e conversio n efficienc yof a heate d oatalyst

. (2.3 ) Monitorin g Conditions : (2.3.1 ) Manufacturers shal l defin e appropriat e operatin g condition s fo rmonitorin g of th e catalvs t heatin g svstem

. subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a

t least once durin g th e firs t engin e star t portio n o f th e applicabl e FT P test

. Th e monitorin g svste m shal l operat e a t least onc e pe r drivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s are met

. Pre-Star

t Heate d Catalyst Systems : Th e diagnosti csvste m shal l monito rth e heatin g syste m fo rprope roperatio n once pe rtrip

. Manufacturer s ma ydisabl e th e monitorin g syste m fo ron e engin e 6tar t i f durin g th e previou s drivin g cycl e th e vehicl e travele d les s tha n th e equivalen t ofth e firs t on e mil e o f FT P driving

. (2.3.2 ) After-Star

t Heate d Catalyst Systems : Th e diagnosti csyste m shal l monito rth e heatin g syste m fo rprope roperatio n once pe rtrip

. Manufacturer s ma ydisabl e th e monitorin g syste m fo ron e ongin e star t i f durin g th e previou s drivin g cycl e th e vehicl e travele d les s tha n th e equivalen t of th e firs t on e mil e o f FT P driving

.

•/*• '(2.3.3 ) Excep t a s note d i n sectio n (b ) (1.2.4) , th e diagnosti csyste m shal l monito rth e conversio n efficienc yofal l heate d catalyst s at leas t onc e pe rtrip

. (2.4 ) MI L Illuminatio n and'Faul t Cod e Storage : (2.4.1 ) Upo n detectio n o f a catalys t heatin g malfunction , th e diagnosti csyste m shal l stor e a faul t cod e an d th e MI L shal l b e illuminate d n o late rtha n th e en d o f th e next tri p i f th e malfunctio n is-aqai n presen t th e MI L shal l illuminat e an d a faul t cod e store d n o late rtha n th e en d o fth e next drivin g cvcl e durin g whic h monitorin g occur s provide d th e malfunctio n i s agai n present

. • (2.4.2 ) Fo rheate d catalys t efficiencymalfunctions , th e MI L shal l b e illuminated , an d a faul t cod e store d accordin g t o sectio n (b ) (1.4)

. (3.0 ) MISFIR E MONITORIN G (3.1 ) Requirement : Th e diagnosti csyste m shal l monito rengin e misfir e an d shal l identif yth e specifi ccylinde rexperiencin g misfire

. Manufacturer s ma vregues t Executiv e Office r

. approva l t o stor e a qenera l misfir e faul t cod e instea d o fa cvlinde rspecifi ccod e unde r certai n operating condition s provide d th e manufacture rsubmit s dat a and/o ra n

. engineerin g evaluatio n whic h adequatel ydemonstrat e tha t th e misfirin g cvlinde rcanno t b e reliabl yidentifie d whe n suc h condition s occur

. I fmor e tha n on e cylinde ri s misfiring , a separat e cod e shal l indicat e tha t multipl e cylinder s ar e misfirin g (specifyin g th e individua l misfirin g cylinder s unde rthi s conditio n i s optional , however , identifyin g onl yon e misfirin g cylinde rshal l no t occu rwhe n a multipl e misfir e cod e i s stored)

. (3.2 ) Malfunctio n Criteria : Th e manufacture rshal l specifyi n th e documentatio n provide d fo r certificatio n (se e subsectio n (g ) an d (h ) infra. ) a percentag e o f misfire s ou t o fth e tota l numbe ro f firin g event s necessaryfo rdeterminin g a malfunctio n fo reac h o fth e condition s liste d below

. (A ) Th e percen t misfir e evaluate d i n 20 0 revolutio n increment s fo reac h engin e spee d an d loa d conditio n whic h woul d resul t i n catalys t damage

. Subjec t t o Executiv e Office rapproval , a longe rinterva l (u p t o 100 0 revolutions ) mayb e employe d provide d th e manufacture rsubmit s dat a and/o ra n engineerin g evaluatio n whic h adeguatel ydemonstrat e tha t catalvs t damag e woul d no t occu rdu e t o unacceptabl yhig h catalvs t temperature s befor e th e interva l ha s elapsed

. Th e manufacture rshal l submi t i n th e certificatio n documentatio n catalys t temperatur e dat a versu s percen t misfir e ove rth e ful l rang e o fengin e spee d an d loa d conditions

. Th e dat a shal l b e obtaine d fro m a representativ e cros s sectio n o fa manufacturer' s engin e offering s fro m smal l t o larg e displacements

. U p t o thre e suc h engin e evaluation s shal l b e documente d pe rmanufacturer , thoug h a manufacture rma ysubmi t mor e dat a i fdesired

. A n engineerin g evaluatio n shal l b e provide d fo restablishin g malfunctio n criteri a fo rth e remainde ro fengin e familie s i n th e manufacturer' s produc t line

. Th e Executiv e Office rshal l waiv e th e evaluatio n requiremen t eac h yea rif , i n th e judgmen t o fth e Executiv e Officer , technologica l change s d o no t affec t th e previousl ydetermine d malfunctio n criteria ;
9

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### (B ) Th e percen t misfire evaluate d i n 100 0 revolutio n increment s whic h woul d caus e emission s fro m a durabilit ydemonstratio n vehicl e t o excee d 1. 5 time s an yofth e applicabl e FT P standard s i f th e degre e of misfir e were presen t fro m th e beginnin g of th e test

. I f th o leve l c

f misfir e determine d unde rthi s requiremen t i s significantl y lowe rfo ra n LE V a

s oppose d t o a No n LEV-wit h a simila rengin e design , th e manufacture rma

yrequest approva l fro m th e Executive Office rt o us e a highe r percentag e of misfire a

s th e malfunctio n criteri a fo rth e LEV , not t o excee d th e leve l of th e No n LEV

. Fo rth e purpos e of establishin g th e percen t misfire , th e manufacture rshal l conduc t th e demonstratio n test(s ) wit h th e misfire event s occurrin g a

t equall yspace d complet e engin e cycl e intervals , acros s randoml y selecte d cylinders throughou t eac h 100 0 revolutio n increment

. However , th e percen t misfire establishe d shal l be applicabl e fo ran ymisfire conditio n (e.g

. random , continuous , equall yspaced , etc. ) fo rth e purpos e of identifyin g a malfunction

. Thi s criterio n ek&U ma yb e use d fo ral l vehicle s wit h engine s containin g th e sam e numbe rof cylinder s a s th e demonstratio n vehicle

. Th e numbe rof misfire s i n 1000 revolutio n increments whic h wa s determine d fo rth e durabilitydemonstratio n vehicl e malfunctio n criterio n ma yb e use d t o establis h th e correspondin g percen t misfir e malfunctio n criteri a fo rengine s wit h othe rnumber s of cylinders

. Th e malfunctio n criteri a fo ra manufacturer' s produc t lin e shal l b e update d whe n a newdurabilit ydemonstratio n vehicl e i s teste d whic h indicate s mor e stringen t criteri a ar

e necessar

ytha n previousl yestablishe d t o remai n withi n th e above emissio n limit ; (C ) Th e degre e o f misfire evaluate d i n 100 0 revolutio n increment s whic h woul d caus e a durabilitydemonstratio n vehicl e t o fai l a n Inspectio n an d Maintenanc e progra m tailpip e emissio n test

. Thi s criterio n shal l appl yt o vehicle s wit h th e sam e numbe r of cylinders a s th e demonstratio n vehicle

. Th e numbe rof misfire s i n 100 0 revolutio n increment s whic h wa s determine d fo rth e durabilitydemonstratio n vehicl e malfunctio n criterio n ma yb e use d t o establis h th e correspondin g percen t misfire malfunctio n criteri a fo rengine s wit h othe rnumber s o f cylinders

. Th e malfunctio n criteri a fo ra manufacturer' s produc t lin e shal l b e update d whe n a newdurabilitydemonstratio n vehicl e i s teste d whic h indicate s mor e stringen t criteri a are necessar

ytha n previousl yestablishe d t o ensure passin g a n Inspectio n an d Maintenance test , o rwhe n th e Inspectio n an d Maintenanc e tes t i s revised

. (3.3 ) Monitorin g Conditions : Fo r1997 an d late rmode l yea rvehicles , misfir e shal l b e monitore d continuousl yan d under-al l positiv e torqu e engin e speed s an d conditions.

- (3.3.1 ) Fo rpre-199 7 modo l yea rvehicles , Pre-199 7 Mode l Yea rVehicles : misfire shal l b e monitore d continuousl yduring , a t a minimum , positiv e torqu e operatin g condition s withi n th e rang e of engin e spee d an d loa d conditio n combination s encountere d durin g a n FT P test ; nonetheless , subjec t t o Executive Office r approval , manufacturers ma yemployhighe rmisfire percentag e malfunctio n criteri a disabl e misfire monitorin g unde rspecifi ccondition s withi n th e rang e of operatin g condition s encountere d durin g a n FT P tes t i f th e manufacture rprovide s dat a and/o ra n engineerin g evaluatio n whic h ca a adeguatel ydemonstrat e tha t th e detectio n of lowe rlevel s o f misfire monitorin g i s not woul d not b e reliabl e feasibl e
1 0fo rth e vehicl e mode l i n questio n whe n suc h condition s ar e encountere d withou t makin g fundamenta l engin e o rcontro l uni t desig n modifications

. I f th e manufacture rca n s o demonstrat e tha t eve n th e detectio n o fa highe rmisfir e percentage s is'no t feasibl e unde rspecifi cFT P operatin g conditions , th e manufacture rma yreques t Executiv e Office rapprova l t o disabl e th e monitorin g svste m whe n suc h condition s ar e encountered

. Further , wit h Executiv e Office r approval , th e manufacture rmaydisabl e misfire , monitorin g whe n misfir e canno t b e distinguishe d fro m othe reffect s whe n usin g th e bes t availabl e monitorin g technology

. Th e manufacture rshal l presen t dat a an d a n engineerin g evaluatio n t o th e Executiv e Office rt o justif yth e propose d action

. (3.3.2 ) 199 7 an d Late rMode l Yea rVehicles : Manufacturer s shal l phas e i n expande d misfir e monitorin g condition s beginnin g wit h th e 199 7 mode l year

. Th e phas e i n percentage s (base d o n th e manufacturer' s projecte d sale s volum e fo ral l vehicle s an d engines ) shal l equa l o rexcee d 5 0 percen t i n th e 199 7 mode l vear , 7 5 percen t i n th e 199 8 mode l vear , 9 0 percen t i n th e 199 9 mode l year , wit h 10 0 percen t implementatio n fo rth e 200 0 mode l year

. Smal l volum e manufacturer s shal l no t b e reguire d t o mee t th e phase-i n percentages : however , 10 0 percen t implementatio n o f thes e monitorin g condition s shal l b e reguire d beginnin g wit h th e 200 0 mode l year

. O n vehicle s meetin g thes e phase-i n percentages , excep t a s provide d fo ri n sectio n (3.3.3 ) below , monitorin g fo rmisfir e shal l b e continuou s an d unde ral l positiv e torgu e engin e speed s an d loa d conditions

. Vehicle s no t meetin g th e monitorin g condition s o fthi s sectio n shal l mee t th e monitorin g condition s specifie d i n sectio n (b)(3.3.1 ) above

. (3.3.3 ) A s a n exceptio n t o monitorin g misfir e durin g al l positiv e torqu e operatin g conditions , manufacturer s mavdisabl e misfir e monitorin g i n th e engin e operatin g regio n boun d b yth e positiv e torqu e lin e (i.e.

. engine'loa d wit h th e transmissio n i n neutral) , an d th e tw o followin g engin e operating points : a n engin e spee d o f300 0 rp m wit h th e engin e loa d a t th e positiv e torgue line , an d th e redlin e engin e spee d (define d i n sectio n (n)(18.0) ) wit h th e engine' s manifol d vacuu m a t fou rinche s o f mercur ylowe rtha n tha t at th e positiv e torgu e line

. Belo wi s a diagra m o f th e permitte d misfire detectio n disablemen t regio n wit h respec t t o th e reguirement s o f thi s section

. Further , wit h Executiv e Office rapproval , th e manufacture rma y disabl e misfir e monitorin g whe n misfir e canno t b e distinguishe d fro m othe reffect s (e.g.

. roug h roads , transmissio n shifts , etc. ) whe n usin g th e bes t availabl e monitorin g technology

. Th e manufacture rshal l presen t dat a and/o ra n engineerin g evaluatio n t o th e Executiv e Office rt o justif yth e propose d action

Executiv e Office rapprova l shal l b e base d o n th e exten t t o whic h monitorin g i s expecte d t o b e disable d i n relatio n t o th e capabilitie s o f th e bes t availabl e monitorin g technologie s a s applie d t o othe rengines

.

1 1 

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## o

_ J C D C 

# "o c U J 

## Positiv e Torqu e Loa d - 4 inche s H g

Disablemen t Regio n

Postiv e Torqu e

idl e 200 0 300 0

. 400 0

Engin e Spee d 500 0 redlin e
(3.4 ) MI L Illuminatio n an d Faul t Cod e Storage : (3.4.1 ) Except a

s provide d below , upo n detectio n of th e leve l o f misfir e specifie d i n subsectio n (3.2 ) (A) , th e MI L shal l blin k once pe rsecon d durin g actua l misfire condition s an d remai n continuousl yilluminate d otherwise

. I n vehicle s whic h provid e fue l shutoff an d defaul t fue l contro l t o preven t overfuelin g durin g misfire conditions , th e MI L nee d not blin k an d .ma yinstea d illuminat e continuousl yupo n detectio n o f misfir e provide d tha t th e fue l shutof f an d defaul t contro l shal l b e activate d as soo n as misfire i s detected

. Fue l shutof f an d defaul t fue l contro l ma y b e deactivate d onl yt o permi t fuelin g outsid e o f th e misfir

e range

. (3.4.2 ) Upo n detectio n o f th e misfire level s specifie d i n subsectio n (3.2 ) (B) o r(C) , th e MI L shal l b e illuminate d an d a faul t cod e store d n o late rtha n th e en d o f th e nex t drivin g cycl e i f misfire i s agai n detected

. I f misfir e i s no t detecte d durin g th e secon d drivin g cycle , th e MI L shal l b e illuminate d an d a faul t cod e store d n o late r tha n th e nex

t drivin g cvcl e i n whic h misfir e i s detected , unles s drivin g condition s simila rt o thos e unde rwhic h misfire wa s originall ydetecte d have bee n encountere d (se e sectio n (3.4.3) ) withou t a n indicatio n o f misfire , i n whic h cas e th e initia l temporar

ycod e an d store d condition s ma ybe erased

. Furthermore , i f simila rdrivin g condition s ar e not encountere d durin g 8 0 drivin g cycle s trip e subsequen t t o th e initia l detectio n of a malfunction , th e initia l temporar ycod e an d store d condition s ma

yb e erased

. (3.4.3 ) Upo n detectio n o f misfire , manufacturer s shal l store th e engin e speed , load , an d warm-u p statu s (i.e. , col d o rwarmed-up ) unde rwhic h th e firs t misfire even t wa s detected

. Atri p o rdrivin g cycl e shal l b e considere d t o hav e simila rcondition s i f th e store d engin e spee d condition s ar e encountere d withi n 375 rpm , loa d
1 2 

# -P Xcondition s withi n 1 0 percent , an d th e sam e warm-u p statu s i s present

. Wit h Executiv e Office rapproval , othe rstrategie s fo rdeterminin g i f simila rcondition s hav e bee n encountere d mayb e employed

. Approva l shal l b e base d o n comparabl e timelines s an d reliabilit yi n detectin g similarconditions

. (3.5 ) MISFIR E MONITORIN G FO R DIESEL S (3.5.1 ) Reguirement : Beginnin g wit h th e 199 8 mode l year , th e diagnosti csvste m o n a diese l engin e shal l b e capabl e o f detectin g th e lac k o f combustio n i n on e o rmor e cylinders

. Th e diagnosti csyste m shal l als o identif yth e specifi ccvlinde rfo rwhic h combustio n canno t b e detected

. I f th e lac k o f combustio n i s presen t i n mor e tha n on e cvlinder , a separat e cod e shal l indicat e tha t multipl e cylinder s ar e malfunctionin g (specifyin g th e individua l malfunctionin g cylinder s unde rthi s conditio n i s optional ; however , identifyin g on e malfunctionin g cvlinde rshal l no t occu rwhe n a multipl e cylinde rcod e i s stored)

. (3.5.2 ) Malfunctio n Criteria : Acylinde rshal l b e considere d malfunctionin g whe n combustio n canno t b e detected

. (3.5.3 ) Monitorin g Conditions : Manufacturer s shal l defin e appropriat e operatin g condition s fo rmonitoring , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a t leas t onc e durin g th e firs t engin e start portio n o fth e applicabl e FT P test

. -Th e monitorin g svste m shal l operat e at leas t onc e pe r drivin g cycl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met

. (3.5.4 ) MI L Illuminatio n an d Faul t Cod e Storage : Th e MI L shal l illuminat e an d a faul t cod e shal l b e store d n o late rtha n th e en d o fth e nex t drivin g cycl e durin g whic h monitorin g occur s provide d th e malfunctio n i s agai n present

. (4.0 ) EVAPORATIVE SYSTE M MONITORIN G (4.1 ) Requirement : (4.1.1 ) Th e diagnosti csyste m shal l verif yai rflo wfro m th e complet e evaporativ e system

. I n addition , th e diagnosti csyste m shal l als o monito rth e evaporativ e syste m fo r th e los s o f H C vapo rint o th e atmospher e byperformin g a pressur e o rvacuu m chec k o f th e complet e evaporative system

. (4.1.2 ) Manufacturer s ma ytemporaril ydisabl e th e evaporativ e purg e syste m t o perfor m a check

. (4.1.3 ) Manufacturer s ma yreques t Executiv e Office rapprova l t o abort a n evaporativ e syste m chec k

unde rspecifi ccondition s (e.g. , whe n th e fue l tan k leve l i s ove r8 5 percen t o fnomina l tan k capacity ) i fi t oa n b e dat a and/o ra n engineerin g evaluatio n ar e provide d whic h adequatel ydemonstrated

- tha t a reliabl e chec k canno t b e mad e whe n thes e condition s exist

. 1 3 

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### (4.1.4 ) Subjec

t t o Executiv e Office rapproval , othe rmonitorin g strategie s ma yb e use d provide d th e manufacture rprovide s a descriptio n of th e strateg yan d supportin g dat a showin g equivalen t monitorin g reliabilit yan d timelines s i n detectin g a n evaporativ e syste m malfunctio n o rleak

. (4.1.5 ) Implementatio n of thi s requiremen t i s mandator yonl yfo r1996 an d late rmode l yea rvehicle s designe d t o compl ywit h th e requirement s of Titl e 13 , Californi a Cod e ofRegulations , Sectio n 1976 , "Standard s an d Tes t Procedure s fo rMoto r Vehicl e Fue l Evaporativ e Emissions, " fo r199 5 an d subsequen t mode l yea r vehicles

. (4.2 ) Malfunctio n Criteria : (4.2.1 ) A n evaporativ e syste m shal l b e considere d malfunctionin g whe n n o ai rflo wfro m th e syste m ca n b e detected , o rwhe n a syste m lea k i s detecte d tha t i s greate r tha n o requa l i n magnitud e t o a lea k cause d b

ya 0.04 0 inc h diamete rorific e i n an yportio n o f th e evaporativ e syste m excludin g th e tubin g an d connection s betwee n th e purg e valv e an d th e intake manifold

. (4.2.2 ) Beginnin g wit h th e 499 3 200 0 mode l vear

. manufacturer s shal l phase-i n diagnosti cstrategie s t o detec t svste m leak

s greate rtha n o requa l i n magnitud e t o a lea k cause d bva 0.02 0 inc h diamete rorifice

. Th e phase-i n percentage s (base d o n th e manufacturer' s projecte d sale s volum e fo ral l vehicles ) shal l egua l o r excee d 5 0 percen t fo rth e 4-99 3 200 0 mode l year

. 7 5 percen t fo rth e 4900 200 1 mode l vear , an d 10 0 percen t implementatio n fo rth e 2000 200 2 mode l year

Smal l volum e manufacturers shal l not b e subjec t t o th e phase-i n requirements : however , 10 0 percen t implementatio n shal l b e require d ior 2000 200 2 mode l vear

. (4.2.3 ) O n vehicle s wit h fue l tan k capacitygreate rtha n 2 5 gallons , th e Executiv e Office r shal l revis e th e siz e o f th e orific e i fth e most reliabl e monitorin g metho d availabl e cannot reliabl ydetect a syste m lea k of thi s th e magnitude s indicate d above

. (4.3 ) Monitorin g Conditions : Th e monitorin g syste m shal l monito rth e evaporative syste m a t leas t once po rtrip

. Manufacturers shal l defin e appropriat e operatin g condition s fo r monitoring , subject t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d at leas t onc e durin g th e firs t engin e star t portio n of th e applicabl e FT P test

. Th e monitorin g svste m shal l operat e at leas t once pe rdrivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met

. However , monitorin g condition s ma vb e furthe rlimite d wit h respec t t o detectin g leak

s eguivalen t t o a 0.02 0 inc h diamete rorifice , subject t o Executive Office rapproval , o n th e basi s that th e monitorin g condition s wil l b e reasonably-occurrin g in-use

. an d provide d that a chec k fo rleaks equa l o rgreate ri n magnitud e tha n a 0.04 0 inc h orific e wil l continu e t o b e conducte d a t leas t onc e pe rdrivin g cvcl e a s indicate d above

. Subjec t t o Executive Office rapproval , i f performanc e of th e chec k cause s vehicle s t o excee d applicabl e emissio n standard s whe n usin g th e bes t availabl e technology , manufacturer s ma yperfor m evaporativ e syste m monitorin g durin g a steady-spee d condition , as define d i n sectio n (b ) (1.3.2) , betwee n 2 0 an d 5 0 mph

. 1 4

. . • • - . - . ^A : ' • ''• •(4.4 ) MI L Illuminatio n an d Faul t Cod e Storage :

(4.4.1 ) Upo n detectio n o f a n evaporativ e syste m malfunctio n o ra malfunctio n tha t prevent s completio n o f a n evaporativ e syste m check , th e MI L shal l illuminat e an d a faul t cod e shal l b e store d n o late rtha n th e en d o f th e next drivin g cycl e durin g whic h monitorin g occurs provide d th e malfunctio n i s agai n present , th e diagnosti c syste m shal l stor e a faul t cod e an d th e MI L shal l illuminat e n o late rtha n th e en d o f th e nex t tri p i fth e malfunctio n i s agai n detected

. (4.4.2 ) I f th e diagnosti csyste m i s capabl e o f discernin g tha t a syste m lea k i s bein g cause d b ya missin g o rimproperl ysecure d fue l cap , th e manufacture rma ynotif y th e vehicl e operato rthroug h th e us e o f a n indicato rligh t othe rtha n th e MIL

. The

. manufacture ri s no t require d t o stor e a faul t cod e i n thi s case

. Th e indicato rligh t shal l confor m t o th e requirement s outline d i n sectio n (a ) (1.1 ) fo rlocatio n an d illumination

. A s anothe roption , th e manufacture rmayextinguis h th e MIL , provide d n o othe rmalfunction s hav e bee n detected , an d mayeras e th e faul t cod e correspondin g t o th e proble m onc e th e on-boar d diagnosti csyste m ha s verifie d tha t th e fue l ca p specificall yha s bee n securel yfastened

. Othe requivalen t strategie s shal l b e considere d b yth e Executiv e Officer

. (5.0 ) SECONDAR YAI R SYSTE M MONITORIN G (5.1 ) Requirement : An yvehicl e equippe d wit h an yfor m o fsecondaryai rdeliver ysyste m shal l hav e th e diagnosti csyste m monito rth e prope rfunctionin g o f(ij

. th e secondar yai r deliverysyste m an d (ii ) an yai rswitchin g valve

. (5.2 ) Malfunctio n Criteria : (5.2.1 ) Th e diagnosti csyste m shal l indicat e secondaryai rdeliverysyste m malfunctio n whe n th e flo wrat e fall s belo wth e manufacturer' s specifie d lo wflo wlimi t suc h tha t a vehicl e woul d excee d 1. 5 time s an yofth e applicabl e FT P emissio n standards

. (5.2.2 ) Manufacturer s adeguatel ydemonstratin g tha t deterioratio n o fth e flo wdistributio n syste m i s unlikel yma

yreques t Executiv e Office rapprova l t o perfor m onl ya functiona l chec k

o f th e system

. A s part o fthi s demonstration , manufacturer s shal l demonstrat e tha t th e material s use d fo rth e secondaryai rsvste m (e.g. , ai r hoses , an d tubing ) ar e inherentl yresistan t t o corrosio n o rothe rdeterioration , to suc h a case , I f a functiona l chec k i s approved , th e diagnosti csyste m shal l indicat e a malfunctio n whe n som e degre e o f secondaryairflo wi s no t detectabl e i n th e exhaus t syste m durin g a check

. (5.3 ) Monitorin g Conditions : Th e monitorin g ofth e secondaryai rdeliver ysyste m an d th e ai r switchin g valv e shal l occu ronc e pe rtrip.

- Manufacturer s shal l defin e appropriat e operating condition s fo rmonitorin g o fth e secondaryai rsystem , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a t leas t onc e durin g th e firs t engin e start portio n o f th e applicabl e FT P test

. Th e monitorin g svste m shal l operat e a t leas t onc e pe rdrivin g cycl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met

.

: ' 1 5 c3_ >P.2 7

(5.4 ) MI L Illuminatio n an d Faul t Cod e Storage : Th e diagnosti csyste m shal l stor e a faul t cod e an d th e MI L shal l illuminat e n o late rtha n th e en d o f th e next tri p i fth e malfunctio n i s agai n dotocte d nex t drivin g cycl e durin g whic h monitorin g occur s provide d th e malfunetio n i s agai n present

. (6.0 ) AI R CONDITIONIN G SYSTE M REFRIGERAN TMONITORIN G (6.1 ) Requirement : (6.1.1 ) Th e diagnosti csyste m shal l monito rai rconditionin g system s fo rlos s o f refrigerant s whic h coul d har m th e stratospheri cozon e laye ro rar e reactiv e i n formin g atmospheri cozone

. An ysenso ruse d fo rsuc h monitorin g shal l itsel fb e monitore d fo rprope rcircui t continuit yan d prope rrang e o f operation

. Aprovisio n fo rensurin g tha t a lea k ha s bee n correcte d befor e extinguishin g th e MI L shal l b e provided

. (6.1.2 ) Manufacturer s o f a mode l vehicl e whic h wil l phas e ou t th e us e o f chlorofluorocarbon s i n its ' ai rconditionin g system s b yth e 199 6 model-yea ro r whic h wil l us e federally-approve d refrigerant s wit h substantiall yles s atmospheri c ozon e depletin g potentia l tha n CFC-1 2 nee d no t compl ywit h thi s requiremen t fo r tha t model

. (6.2 ) Malfunctio n Criteria : Manufacturer s shal l provid e a monitorin g strateg yfo rapprova l b y th e Executiv e Office rfo rmonitorin g a refrigeran t leak

. Th e approva l shal l b e base d o n timelines s an d reliabilit yi n detectin g a leak

. (6.3 ) Monitorin g Conditions : Th e diagnosti csyste m shal l monito rth o ai rconditionin g syste m a t leas t onc e pe rtrip

. Manufacturer s shal l defin e appropriat e operatin g condition s fo r monitoring , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a t leas t onc e durin g th e firs t engin e star t portio n o f th e applicabl e FT P test

. Th e monitorin g svste m shal l operat e a t leas t onc e pe rdrivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e me t (6.4 ) MI L Illuminatio n an d Faul t Cod e Storage : Th e diagnosti csyste m shal l stor e a faul t cod e an d th e MI L shal l illuminat e n o late rtha n th e en d o f th e nex t tri p i f th e malfunctio n i s agai n presen t drivin g cvcl e durin g whic h monitorin g occur s provide d th e malfunctio n i s agai n present

. Th e diagnosti csyste m shal l no t clea ra faul t cod e an d th e MI L shal l no t tur n of f unles s th e lea k ha s bee n corrected

. (7.0 ) FUE L SYSTE M MONITORIN G (7.1 ) Requirement : Th e diagnosti csyste m shal l monito rth e fue l deliverysyste m fo rit s abilit yt o provid e complianc e wit h emissio n standards

. Fo rdiese l vehicle s an d engines , th e manufacture rshal l monito rth e performanc e o fal l electroni cfue l svste m component s t o th e exten t feasibl e wit h respec t t o th e malfunctio n criteri a specifie d i n sectio n (7.2 ) below

.

1 6



# AUP.2 8

(7.2 ) Malfunctio n Criteria : Th e manufacture rshal l establis h malfunctio n criteri a t o monito r th e fue l deliverysyste m suc h tha t a vehicle' s emission s woul d no t excee d 1. 5 time s an yo f th e applicabl e FTP.standard s befor e a faul t i s detected

. I fth e vehicl e i s equippe d wit h fue l tri m circuitry , th e manufacture rshal l includ e a s on e o fth e malfunctio n criteri a th e conditio n wher e th e tri m circuitryha s use d u p al l o fth e tri m adjustmen t allowe d withi n th e manufacturer' s selecte d limit(s)

. Manufacturer s ma y compensat e th e criteri a limit(s ) appropriatel yfo rchange s i n altitud e o rfo rtemporar y introductio n o flarg e amount s o f purg e vapo ro rfo rothe rsimila ridentifiabl e operatin g condition s whe n the yoccur

. (7.3 ) Monitorin g Conditions : Th e fue l syste m shal l b e monitore d continuousl yfo rth e presenc e o f a malfunction

. (7.4 ) MI L Illuminatio n an d Faul t Cod e Storage : (7.4.1 ) Fo rfue l system s wit h short-ter m tri m onl ycapability , th e diagnosti csyste m shal l stor e a faul t cod e afte rth e fue l syste m ha s attaine d th e criteri a limi t fo ra manufacturer-define d tim e interva l sufficien t t o determin e a malfunction

. I f th e malfunctio n criteri a limi t an d tim e interva l ar e exceeded , th e MI L shal l b e illuminate d an d a faul t cod e store d n o late rtha n th e en d o f th e nex t drivin g cycl e i n whic h th e criteri a an d interva l ar e agai n exceeded , unles s drivin g condition s simila rt o thos e unde rv/hic h th e proble m wa s originall ydetecte d hav e bee n encountere d (se e sectio n (7.4.3) ) withou t suc h a n exceedance , i n whic h cas e th e initia l temporarycod e an d store d condition s mayb e erased

. Furthermore , i f simila rdrivin g condition s ar e no t encountere d durin g 8 0 drivin g cycle s trip s subsequen t t o th e initia l detectio n o fa malfunction , th e initia l temporar ycod e an d store d condition s ma

yb e erased

. (7.4.2 ) Fo rfue l system s wit h long-ter m fue l tri m capability , upo n attainin g a long-ter m base d malfunctio n criteri a limi t independen t of , o ri n combinatio n with , th e short-ter m tri m syste m status , th e MI L shal l b e illuminate d an d a faul t cod e store d n o late rtha n th e en d o f th e nex t tri p drivin g cvcl e i f th e malfunctio n i s agai n detected

. I f th e malfunctio n i s no t detecte d durin g th e secon d drivin g cycle , th e MI L shal l b e illuminate d an d a faul t cod e store d n o late rtha n th e nex t drivin g cvcl e i n whic h th e malfunctio n i s agai n detected , unles s drivin g condition s simila r t o thos e unde rwhic h th e proble m wa s originall ydetecte d hav e bee n encountere d (se e subsectio n (7.4.3) ) withou t a n indicatio n o fa malfunction , i n whic h cas e th e initia l temporarycod e an d store d condition s mayb e erased

. Furthermore , i f simila rdrivin g condition s ar e no t encountere d durin g 8 0 drivin g cycle s trip s subsequen t t o th e initia l detectio n o f a malfunction , th e initia l temporar ycod e an d store d condition s mayb e erased

. (7.4.3 ) Upo n detectio n o f a fue l syste m malfunction , manufacturer s shal l stor e th e engin e speed , loa d an d warm-u p statu s (i.e. , col d o rwarmed-up ) unde rwhic h th e malfunctio n wa s detected

. Atri p o rdrivin g cycl e shal l b e considere d t o hav e simila rcondition s i f th e store d engin e spee d i s encountere d withi n 37 5 rpm , loa d condition s withi n 1 0 percent , an d th e sam e warm-u p statu s i s present

. Wit h Executiv e Office rapproval , othe rstrategies , fo rdeterminin g i fsimila rcondition s
1 7


# ' 0 1 - .

### have bee n encountere d ma yb e employed

. Approva l shal l be base d o n comparabl e timelines s an d reliabilityi n detectin g simila rconditions

. 

## (8.0 ) OXYGE NSENSO R MONITORIN G (8.1 ) Requirement : (8.1.1 ) th e diagnosti csyste m shal l monito rth e outpu t voltage , respons e rate , an d an y othe rparamete rwhic h ca n affec t emissions , o

f al l primar

y(fue l control ) oxyge n (lambda ) sensors fo rmalfunction

. I t shal l als o monito ral l secondar yoxyge n sensor s (fue l tri m contro l o rus e a s a monitorin g device ) fo rprope routpu t voltag e and/o rrespons e rate

. Respons e rat e i s th e tim e require d fo rth e oxyge n senso r t o switc h fro m lean-to-ric h onc e i t i s expose d t o a richertha n stoichiometri c exhaus t ga s o rvic e vers a (measurin g oxyge n senso rswitchin g frequencyma y not b e a n adequat e indicato rof oxyge n senso rrespons e rate , particularl yat lo w speeds)

. (8.1.2 ) Eithe rth e lean-to-ric h o rbot h th e lean-to-ric h an d rich- to-lea n respons e rate s shal l b e checked

. Respons e rat e check s shal l evaluat e th e portion s o f th e sensor' s dynami csigna l that are most affecte d b ysenso rmalfunction s suc h a s agin g o rpoisoning

. Manufacturers ma

yobserve th e voltag e envelop e of th e senso rwhe n cycle d a t a frequenc yo f1. 5 Hertz o rgreater , a s determine d b

yth e manufacturer , t o evaluat e a slowrespons e rat e senso r(i.e

. a slowsenso rcanno t achieve maximu m and/o r minimu m voltag e as wil l a goo d senso rgive n a properl ychose n switchin g frequenc yan d fue l ste p chang e fo rth e check)

. Wit h Executive Office rapproval , manufacturers ma

yus e othe rvoltag e requirements/fuel-ai rswitchin g frequencie s o rmonitorin g strategie s base d o n a determinatio n o f accurat e an d timel y evaluatio n o f th e sensor

. (8.1.3 ) Fo rsensor

s wit h differen t characteristics , th e manufacture rshal l submi t dat a an d a n engineerin g evaluatio n t o th e Executive Office rfo rapprova l base d o n showin g equivalen t evaluatio n of th e sensor

. (8.1.4 ) Fo rvehicle s equippe d wit h heate d oxyge n sensors , th e heate rcircui t shal l b e monitore d fo rprope rcurren t an d voltag e dro p (note : a continuitychec k o f oxyge n sensors i s no t required)

. Othe rheate rcircui t monitorin g strategie s woul d require approva l byth e Executiv e Office rbase d o n equall yreliabl e an d timel yindicatio n o f malfunctio n a s curren t o rvoltage-base d monitoring

. (8.2 ) Malfunctio n Criteria : (8.2.1 ) A n oxyge n senso rshal l b e considere d malfunctionin g whe n th e voltage , respons e rate , o rothe rcriteri a are exceede d an d cause s emission s fro m a vehicl e equippe d wit h th e sensor(s ) t o excee d 1. 5 time s an yo f th e applicabl e FT P standards , o rwhe n th e criteri a ofsensor s fo rus e as a diagnosti csyste m monitorin g devic e (e.g. , fo rcatalys t efficienc ymonitoring ) ar

e exceeded

. 1 8 

# ' a r- ' 

# . • • - - -(8.2.2 ) Fo rheate d oxyge n sensors , th e heate rcircui t shal l b e considere d malfunctionin g whe n th e curren t o rvoltag e dro p i n th e circui t i s n o longe rwithi n th e manufacturer' s specifie d limit s fo rprope rnorma l operatio n (i.e. , withi n th e criteri a reguire d t o b e me t b yth e componen t vendo rfo rheate rcircui t performanc e a t hig h mileage)

. Subjec t t o Executiv e Office rapproval , othe rmonitorin g strateg y malfunctio n criteri a fo rdetectio n o fheate rcircui t malfunction s mayb e use d provide d th e manufacture rsubmit s dat a and/o ra n engineerin g evaluatio n adeguatel yshowin g monitorin g reliabilit yan d timeliness t o b e equivalen t t o th e state d criteri a i n thi s paragraph

. (8.3 ) Monitorin g Conditions : (8.3.1 ) Fo rprimaryoxyge n sensor(s ) use d fo rfue l control , th e respons e rat e an d outpu t voltag e shal l b e monitore d fo rmalfunctio n befor e th e en d o f th e firs t idl e perio d afte rth e vehicl e ha s commence d closed-loo p operation , i fth e necessarycheckin g conditio n fo racceptabl e oxyge n sensor(s ) performanc e ha s bee n encountered

. Th e performanc e o f th e senso rca n onl yb e judge d acceptabl e b yon e o rmor e o f th e followin g means : withi n an y2 0 secon d reasonabl ystead yspee d conditio n a s defined i n (b ) (1.3.2) , withi n an ydeceleratio n o f 3 second s o rmore , o rdurin g th e firs t idl e perio d o f a t leas t 2 0 second s afte rclose d loo p operatio n begin s (i.e. , no t durin g a n acceleratio n condition) ; no t withstanding , unacceptabl e performanc e ca n b e determine d at an ytime

. Othe rmonitorin g condition s mayb e use d provide d th e manufacture rprovide s a monitorin g strateg yan d supportin g dat a showin g equivalen t monitorin g reliabilit yan d timelines s i n detectin g a malfunctionin g senso rcompare d t o th e abov e monitorin g condition s an d th e Executiv e Office rapproves

.
(8.3.2 ) Fo rsecondaryoxyge n sensor s use d fo rcatalys t monitorin g and/o rfue l syste m trim , th e manufacture rshal l defin e appropriat e operating condition s fo rrespons e rat e and/o routpu t voltag e malfunctio n monitorin g shal l b e monitore d fo r malfunction , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a t leas t onc e durin g th e firs t engin e start portio n o fth e applicabl e FT P test

. Th e monitorin g svste m shal l operat e a t leas t onc e pe rdrivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e me t pe rtrip

. (8.3.3 ) Fo rheate d oxyge n sensors , th e manufacture rshal l defin e appropriat e operatin g condition s fo rmalfunctio n monitorin g o fth e heate rcircui t shal l b e monitore d fo r malfunction , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a t leas t onc e durin g th e firs t engin e start portio n o fth e applicabl e FT P test

. Th e monitorin g syste m shal l operat e a t leas t onc e pe rdrivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e me t pef-trip

. (8.4 ) MI L Illuminatio n an d Faul t Cod e Storage : Upo n detectio n o f an yoxyge n senso r malfunction , th e diagnosti csyste m shal l stor e a faul t cod e an d th e MI L shal l illuminat e n o late rtha n th e en d o f th e next tri p i fth e malfunctio n i s agai n presen t drivin g cvcl e durin g whic h monitorin g occur s provide d th e malfunctio n i s agai n present

.

1 9

^P.3 1

(8.5 ) Othe r(non-lambda ) Oxyge n Sensors : (8.5.1 ) Fo rvehicle s equippe d wit h universa l exhaus t ga s oxyge n sensor s (i.e

. sensor s whic h provid e a n outpu t proportiona l t o exhaus t ga s oxyge n concentration) , th e manufacture rshal l defin e appropriat e operatin g condition s fo rth e diagnosti c syste m shal l provid o t o perfor m a respons e rat e chec k (th e tim e require d t o respon d t o a specifi cchang e i n fuel/ai rratio) , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a t leas t onc e durin g th e firs t engin e star t portio n o fth e applicabl e FT P test

. Th e monitorin g svste m shal l operat e a t leas t onc e pe rdrivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met , pe rtri p an d a n Th e diagnosti csvste m shal l als o perfor m a n out-of-rang e chec k

fo rwhic h monitorin g shal l b e continuous

. Fo rmalfunctions , MI L illuminatio n an d faul t cod e storag e shal l b e a s i n (8.4)

. (8.5.2 ) I f a manufacture rutilize s othe rtype s o foxyge n sensors , th e manufacture rshal l submi t a monitorin g pla n t o th e Executiv e Office rfo rapprova l base d o n equivalen t monitorin g wit h conventiona l sensors

. (9.0 ) EXHAUS TGA S RECIRCULATIO N (EGR ) SYSTE M MONITORIN G j(9.1 ) Requirement : (9.1.1 ) Th e diagnosti csyste m shal l monito rth e EG R syste m o n vehicle s so-equippe d fo r lo wan d hig h flo wrat e malfunctions

. (9.1.2 ) Manufacturer s ma yreques t Executiv e Office rapprova l t o temporaril ydisabl e th e EG R syste m chec k

unde rspecifi ccondition s i fi t ca n b e provide d th e manufacture rsubmit s dat a and/o ra n engineerin g evaluatio n whic h adeguatel y demonstrated

- tha t a reliabl e chec k canno t b e mad e whe n thes e condition s exist

. (9.2 ) Malfunctio n Criteria : Th e EG R syste m shal l b e considere d malfunctionin g whe n on e o r bot h ofth e followin g occurs : (1 ) an ycomponen t ofth e syste m fail s t o perfor m withi n manufacture rspecifications , o r(2 ) th e EG R flo wrat e exceed s th e manufacturer' s specifie d lo wo rhig h flo wlimit s suc h tha t a vehicl e woul d excee d 1. 5 time s an yo f th e applicabl e FT P emissio n standards

. (9.3 ) Monitorin g Conditions : Th o diagnosti csyste m Manufacturer s shal l defin e appropriat e operatin g condition s fo rmonitorin g th e EG R svstem , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a t leas t onc e durin g th e firs t engin e star t portio n o f th e applicabl e FT P tes t monito rth e EG R svste m a t leas t onc o po rtrip

. Th e monitorin g svste m shal l operat e a t leas t onc e pe rdrivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met

. (9.4 ) MI L Illuminatio n an d Faul t Cod e Storage : Th e diagnosti csyste m shal l stor e a faul t cod e an d th e MI L shal l illuminat e n o late rtha n th e en d o f th e nex t drivin g cvcl e durin g whic h monitorin g occur s provide d trip-if

- th e malfunctio n i s agai n present

.

2 0 

# -3d
.(10.0 ) COMPREHENSIV E COMPONEN TMONITORIN G

(10.1 ) Reguirement : Th e diagnosti csvste m shal l monito rfo rmalfunctio n an yelectroni c powertrai n component/syste m no t otherwis e describe d abov e whic h eithe rprovide s inpu t t o (directl yo rindirectly), o rreceive s command s fro m th e on-boar d computer , an d which : (1 ) ca n affec t emission s durin g an yreasonabl e in-us e drivin g condition , o r (2 ) i s use d a s part o f th e diagnosti cstrateg yfo ran vothe rmonitore d svste m o r component

. (10.1.1 ) Inpu t Components : {A)—Th e diagnosti csyste m shal l monito rfo rmalfunctio n an yelectroni cpowertrai n component/syste m whic h ca n affec t omission cno t otherwis e describe d abov e an d whic h provide s inpu t directl yo rindirectl yt o th e on-boar d computer

. (S^A) Th e monitorin g syste m shal l hav e th e capabilit yo f detecting , a t a minimum , lac k o fcircui t continuit yan d ou t o frang e value s t o ensur e prope roperatio n o f th e inpu t device

. Th e determinatio n o fou t o f rang e value s shal l includ e logi c evaluatio n o f availabl e informatio n t o determin e i f a componen t i s operatin g withi n it s norma l rang e (e.g.

. a lo wthrottl e positio n senso rvoltag e woul d no t b e reasonabl e a t a hig h engin e spee d wit h a hig h mas s airflo wsenso rreadino).(er37 T indicatin g a malfunctio n i n th e cas e o f hig h fue l tan k pressur e whe n th e coolan t temperatur e i s low ; a n acceleromete routpu t indicatin g continuou s roug h roa d conditions , etc.)

. {€4(B ) Inpu t component s mayinclude , bu t ar e no t limite d to , th e vehicl e spee d sensor , cran k angl e sensor , knoc k

sensor , throttl e positio n sensor , coolan t temperatur e sensor , ca m positio n sensor , fue l compositio n senso r(e.g

. methano l flexibl e fue l vehicles) , transmissio n electroni ccomponent s suc h a s sensors , modules , an d solenoid s whic h provid e signal s t o th e powertrai n contro l syste m (se e sectio n (b ) (10.5))

. (D)_C 1 Th e coolan t temperatur e senso rshal l b e monitore d fo rachievin g a stabilize d minimu m temperatur e leve l whic h i s neede d t o achiev e closed-loo p operatio n (o r fo rdiese l applications , th e minimu m temperatur e neede d fo rwarmed-u p fue l contro l t o begin ) withi n a manufacturer-specifie d tim e interva l afte rstartin g th e engine

. Th e tim e interva l shal l b e a functio n o f startin g engin e coolan t temperatur e and/o ra functio n o f intak e ai rtemperature

. Manufacturer s shal l provid e dat a t o support specifie d times

. Th e Executiv e Office rshal l allo w disablemen t o f thi s chec k unde rextremel ylo wambien t temperatur e condition s provide d a manufacture rsubmit s dat a and/o ra n engineerin g evaluatio n whic h adeguatel ydemonstrate d non-attainmen t o fa stabilize d minimu m temperature

. (10.1.2 ) Outpu t Components : (A ) Th e diagnosti csyste m shal l monito routput component s fo rprope rfunctiona l respons e t o compute rcommands , fo rprope rfunctiona l respons e t o eac h compute r command , an ypowertrai n outpu t component/syste m receivin g command s fro m th e
2 1
.-'• • . . -* l7 • ' • "

_P.3 3



### compute reithe rdirectl yo rindirectl ywhich , ca n affec t omiscion can d whic h i cnot otherwis e monitore d as a component/syste m i n th e above monitorin g requirements

. (B ) Component s fo rwhic h functiona l monitorin g i s not feasibl e shal l be monitored , a t a minimum , fo rprope rcircui t continuit yan d ou t of rang e values , i f applicable

. (C ) Outpu t component s ma yinclude , bu t ar

e not limite d to , th e automati cidl e spee d motor , emission-relate d electroni conl ytransmissio n controls , heate d fue l preparatio n systems , th e wait-to-star t lam p o n diese l applications , an d a warmu p catalys t bypas s valv e (se e sectio n (b ) (10.5))

. (10.2 ) Malfunctio n Criteria : (10.2.1 ) Inpu t Components : Inpu t components/system s shal l b e considere d malfunctionin g when , a

t a minimum , lac k

of circui t continuityo r manufacturer-specifie d out-of-rang e value s occur

. Additionally , th e coolan t temperature senso rshal l be considere d malfunctionin g i f i t doe s not achiev e a stabilize d minimu m temperature necessar yfo rclosed-loo p operatio n withi n a manufacture rspecifie d tim e interva l afte rstartin g th e engine

. (10.2.2 ) Outpu t Components : Outpu t components/system s shal l b e considere d malfunctionin g whe n a prope rfunctiona l respons e t o eae h compute rcommand s doe s not occur

. Shoul d a functiona l chec k fo rmalfunctio n no

t b e feasible , the n a n outpu t component/syste m shal l b e considere d malfunctionin g when , at a minimum , lac k

of circui t continuityo rmanufacturer-specifie d out-of-rang e value s occur

. (10.3 ) Monitorin g Conditions : Components/system s i n thi s subsectio n shol l b e monitore d continuously

. (10.3.1 ) Inpu t Components : Inpu t component s shal l b e monitore d continuousl yfo rprope r rang e ofvalue s an d circui t continuity

. Fo rrationalitymonitorin g (where applicable) , manufacturers shal l defin e appropriat e operatin g condition s durin g whic h monitorin g shal l occur , subject t o th e limitatio n that th e monitorin g condition s shal l b e encountere d a t least once durin g th e firs t engin e star t portio n of th e applicabl e FT P test

. Rationalit ymonitorin g shal l occu ra t leas t onc e pe r driving ' cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met

. (10.3.2 ) Outpu t Components : Monitorin g fo rcircui t continuityan d prope rrang e o f value s (i f applicable ) shal l be conducte d continuously

. Fo rfunctiona l monitoring , manufacturers shal l defin e appropriat e operatin g condition s durin g whic h monitorin g shal l occur , subjec t t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d a

t least onc e durin g th e firs t engin e star t portio n o fth e applicabl e FT P test

. However , functiona l monitorin g ma vbe conducte d durin g non-FT P drivin g conditions , subjec t t o Executive Office rapproval , i f th e manufacture rprovide s dat a and/o ra n engineerin g evaluatio n whic h adeguatel y demonstrat e tha t th e componen t doe s no t normall yfunction , o rmonitorin g i s
2 2



## '
- " . • . . • X L • ~ . - - ' .P.3 4

otherwis e no t feasible , durin g applicabl e FT P tes t drivin g conditions

. Functiona l monitorin g shal l occu ra t leas t onc e pe rdrivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met

. (10.4 ) MI L Illuminatio n an d Faul t Cod e Storage : (10.4.1 ) Upo n detectin g a malfunction , th e diagnosti csyste m shall-stor e a faul t cod e an4

tho MILshall

illuminate)

n o late rtha n th e en d o f th e next drivin g cycl e durin g whic h monitorin g occur s provide d tri p i fth e malfunctio n i s agai n detected

. (10.4.2 ) I n conjunctio n wit h storin g a faul t code , manufacturer s shal l illuminat e th e MI L

fo rmalfunction s o fcomponents/system s fo rwhic h eithe ro fth e followin g occurs : 1 ) Whe n malfunctioning , th e componen t o rsvste m coul d caus e vehicl e emission s t o increas e by1 5 percen t o rmor e ofth e FT P standard , o r2 ) Th e component/syste m i s use d a s part o fth e diagnosti cstrateg yfo ran yothe r monitore d syste m o rcomponent

. (10.5 ) Componen t Determination : Th e manufacture rshal l determin e whethe ra powertrai n inpu t o routput componen t no t otherwis e covere d ca n affec t emissions

. I f th e Executiv e Office rreasonabl ybelieve s tha t a manufacture rha s incorrectl y.determine d tha t a componen t canno t affect emissions , th e Executiv e Office rshal l requir e th e manufacture rt o provid e emissio n dat a showin g tha t suc h a component , whe n fault y an d installe d i n a suitabl e tes t vehicle , doe s no t hav e a n emissio n effect

. Emissio n dat a ma vb e regueste d fo ran yreasonabl e drivin g condition

. (c ) ADDITIONA L MI L ILLUMINATIO N AN D FAUL TCOD E STORAG E PROTOCO L (1.0 ) MI L ILLUMINATIO N Fo ral l emission-relate d components/systems , upo n fina l determinatio n o fmalfunction , th e MI L shal l remai n continuousl yilluminate d (excep t tha t i t shal l blin k

a s indicate d previousl yfo rmisfir e detection)

. I f an ymalfunction s ar e identifie d i n additio n t o misfire , th e misfir e conditio n shal l tak e precedence , an d th e MI L shal l blin k

accordingly

. Th e diagnosti csyste m shal l stor e a faul t cod e fo rMI L illuminatio n wheneve rth e MI L i s illuminated

. Th e diagnosti csyste m shal l illuminat e th e MI L an d shal l stor e a cod e wheneve rth e engin e contro l powertrai n enter s a defaul t o r "lim p home " mod e o f operation

. Th e diagnosti csyste m shal l illuminat e th e MI L an d shal l stor e a cod e wheneve rth e engin e contro l syste m fail s t p ente rclosed-loo p operatio n (i f employed ) withi n a manufacture rspecifie d minimu m tim e interval

. (2.0 ) EXTINGUISHIN G TH E MI L (2.1 ) Misfir e an d Fue l Syste m Malfunctions : Fo rmisfir e o rfue l syste m malfunctions , th e MI L ma yb e extinguishe d i f th e faul t doe s no t recu rwhe n monitore d durin g thre e subsequen t sequentia l drivin g cycle s i n whic h condition s ar e similart o thos e unde rwhic h th e malfunctio n wa s firs t determine d (se e section s (b ) (3.4.3 ) an d (b)(7.4.3))

. (2.2 ) Al l Othe rMalfunctions : Excep t a s note d i n sectio n (b ) (6.4) , fo ral l othe rfaults , th e MI L ma yb e extinguishe d afte rthre e subsequen t sequentia l drivin g cycle s durin g whic h th e monitorin g svste m responsibl e fo rilluminatin g th e MI L function s withou t detectin g th e
2 3 

## '32 >P.3 5

malfunctio n trip s i n whic h th e malfunctio n ha s no t recurre d an d i f n o othe rmalfunctio n ha s bee n identifie d tha t woul d independentl yilluminat e th e MI L accordin g t o th e requirement s outline d above

. (3.0 ) ERASIN G AFAUL TCOD E Th e diagnosti csyste m ma yeras e a faul t cod e i fth e sam e faul t i s no t re-registere d i n a t leas t 4 0 engin e warm-u p cycles , an d th e MI L i s no t •illuminate d fo rtha t faul t code

. (d ) TAMPERIN G PROTECTIO N Computer-code d engin e operatin g parameter s shal l no t b e changeabl e withou t th e us e o fspecialize d tool s an d procedure s (e.g

. soldere d o rpotte d compute rcomponent s o rseale d (o rsoldered ) compute renclosures)

. Subjec t t o Executiv e Office rapproval , manufacturer s mayexemp t fro m thi s requiremen t thos e produc t line s whic h ar e unlikel yt o requir e protection

. Criteri a t o b e evaluate d i n makin g a n exemptio n include , bu t ar e no t limite d to , curren t availabilit yo fperformanc e chips , hig h performanc e capabilit yo f th e vehicle , an d sale s volume

. Manufacturer s usin g reprogrammabl e compute rcod e system s (e.g. , EEPROM ) shal l emplo yprove n method s t o dete runauthorize d reprogrammin g whic h ma vinclud e copyrightabl e executabl e routine s o rothe rmethods

. Beginnin g wit h th e 199 9 mode l vear , manufacturer s shal l includ e enhance d tampe rprotectio n strategie s includin g dat a encryptio n usin g method s t o secur e th e encryptio n algorithm , an d writ e protec t feature s reguirin g electroni cacces s t o a n off-sit e compute rmaintaine d b yth e manufacturer

. Eguivalen t method s shal l als o b e considere d b vth e Executiv e Officer

. An vreprogrammabl e compute rcod e syste m (e.g

. EEPROM ) shal l includ e prove n write-proteo t feature s whic h ma yinclud e copyrightabl e executabl e routine s o rothe rmethods

. (e ) READINESS/FUNCTIO N COD E Th e on-boar d compute rshal l stor e a cod e upo n firs t completin g I f a ful l diagnosti cchec k (i.e. , th e minimu m numbe ro fcheck s necessar yfo r MI L illumination ) o fal l monitore d component s an d system s (excep t a s note d below ) ha s no t bee n complete d sinc e th e compute rmemorywa s las t cleare d (e.g. , throug h th e us e o f a sca n too l o rbatter ydisconnect).

. th e manufacture rshal l stor e a cod e indicatin g th e nee d fo radditiona l mixe d cit van d highwa ydrivin g t o complet e th e check

. Th e cod e shal l b e store d i n th e forma t specifie d b ySA E J197 9 o rSA E J1939 , whicheve rapplies

. Bot h document s ar e incorporate d b vreferenc e i n section s (k)(2.0 ) an d (k)(5.0)

. Th e diagnosti csyste m chec k fo rcomprehensiv e componen t monitorin g an d continuou s monitorin g o f misfire an d fue l syste m fault s shal l b e considere d complet e fo rpurpose s o f determinin g th e readines s indicatio n i f malfunction s ar e no t detecte d i n thes e area s b yth e tim e al l othe rdiagnosti csyste m check s ar e complete

. I fmonitorin g i s temporaril ydisable d unde rcondition s whic h ma ylea d t o fals e code s fo ran ysystem , tha t chec k

shal l no t b e considere d i n determinin g diagnosti csyste m readiness

. Fo r evaporativ e svste m monitoring , th e readines s indicatio n shal l b e se t whe n a ful l diagnosti cchec k

ha s bee n complete d wit h respec t t o th e 0.04 0 inc h orific e malfunctio n criteri a i f th e monitorin g condition s ar e constraine d wit h respec t t o detectio n a 0.02 0 inc h lea k

(se e section s (b)(4.2.2 ) an d (4.3)

. Th e diagnosti csvste m shal l alc o includ e a cod e o racknowledg e messag e indicatin g tha t th e diagnosti csyste m itsel f i o functionin g properly

.

2 4(f ) STORE D ENGIN E CONDITION S Upo n detectio n o f th e firs t malfunctio n o f an y

componen t o rsystem , "freez e frame " engin e condition s presen t a t th e tim e shal l b e store d i n compute rmemory

. Shoul d a subsequen t fue l syste m o rmisfir e malfunctio n occur , an ypreviousl ystore d freez e fram e condition s shal l b e replace d b yth e fue l syste m o rmisfir e condition s (whicheve roccur s first)

. Store d engin e condition s shal l include , bu t ar e no t limite d to , calculate d loa d value , engin e RPM , fue l tri m value(s ) [i f available) , fue l pressur e (i favailable) , vehicl e spee d (i f available) , coolan t temperature , intak e manifol d pressur e (i f available) , closed

- o ropen-loo p operatio n (i favailable) , an d th e faul t cod e whic h cause d th e dat a t o b e stored

. Th e manufacture rshal l choos e th e mos t appropriat e se t o f condition s facilitatin g effectiv e repair s fo rfreez e fram e storage

. Onl yon e fram e o fdat a i s required

. Manufacturer s maya t thei rdiscretio n choos e t o stor e additiona l frame s provide d tha t a t leas t th e require d fram e ca n b e rea d b ya generi csca n too l meetin g SA E specification s establishe d i n SA E Recommende d Practice s o n "OB D I I Sca n Tool " (J1978) , Marc h 109 2 June

. 1994

. an d "E/ E Diagnosti c Tes t Modes " ( J 1979) , Decembe r199 1 June , 1994 , whic h ar e incorporate d b yreferenc e herein

. I f approva l i s grante d t o us e th e SA E J193 9 communicatio n protoco l accordin g t o sectio n (k)(5.0) , th e dat a shal l b e accessibl e usin g a sca n too l meetin g th e J193 9 specifications

. I fth e faul t cod e causin g th e condition s t o b e store d i s erase d i n

. accordanc e wit h sectio n (c ) (3.0) , th e store d engin e condition s mayb e cleare d a s well

. (g ) DURABILITY

DEMONSTRATION

VEHICLE

MONITORIN G SYSTE M DEMONSTRATIO N REQUIREMENT S (1.0 ) REQUIREMEN TEac h yea ra manufacture rshal l provid e emissio n tes t dat a obtaine d fro m a certificatio n durabilit yvehicl e fo ron e engin e famil ycertificatio n durabilit yvehicl e tha t ha s no t bee n use d previousl yfo rpurpose s o fthi s section

. I fa manufacture rdoe s no t hav e a certificatio n durabilit yvehicl e availabl e whic h i s suitabl e fo r#ws domonstratien

th e engin e famil ydesignate d fo rtesting , Tth e Executiv e Office rshal l permi t a manufacture rt o satisfythi s reguiremen t wit h waiv e thi s requiremen t i fa manufacture rdoe s no t hav e a certificatio n durabilit yvehicl o availabl e whic h i s suitabl e fo rthi s demonstratio n i n a give n year , provide d a manufacture rsubmit s othe rdat a fro m a representativ e hig h mileag e vehicl e o rvehicle s (o ra representativ e hig h operating-hou rengin e o rengines ) acceptabl e t o th e Executiv e Office rt o demonstrat e tha t malfunctio n criteri a ar e base d o n emissio n performance

. Th e Ai rResource s Boar d (ARB ) shal l determin e th e demonstratio n vehicl e engin e famil yt o b e demonstrated

. Eac h manufacture rshal l notifyth e Executiv e Office rprio rt o runnin g a Californi a durabilit yvehicl e i n orde rt o allo wpossibl e selectio n a s th e demonstratio n vehicl e fo ra give n mode l yea runles s a vehicl e ha s previousl ybee n chose n fo rth e give n mode l yea F applyin g fo rcertificatio n o f th e engin e familie s planne d fo ra particula rmode l vea ri n orde rt o allo wselectio n o f th e engin e famil yt o b e demonstrated

. Demonstratio n test s shal l b e conducte d o n th e certificatio n durabilit yvehicl e o rengin e at th e en d o f th e require d mileag e o roperating-hou raccumulation

. Fo rnon-LEVs , unti l a NO xstandar d

. applicabl e fo rmor e tha n 50,00 0 mile s i s establishe d i n California , th e federa l 50,00 0 t o 100,00 0 mil e NO xstandar d shal l b e use d fo rdemonstratio n purposes

. (1.1 ) Flexibl e fue l vehicle s shal l perfor m eac h demonstratio n tes t usin g 8 5 percen t methano l an d 1 5 per.cen t gasoline , an d gasolin e only

. Fo rvehicle s capabl e o foperatin g o n othe r fue l combinations , th e manufacture rshal l submi t a pla n fo rperformin g demonstratio n
2 5 

# 3 ^P.3 7



### testin g fo rapprova l b

yth e Executive Office ro n th e basi s of providin g accurat e an d timel yevaluatio n o f th e monitore d systems

. (2.0 ) APPLICABILITY ! Th e manufacture rshal l perfor m single-faul t testin g base d o n th e applicabl e FT P tes t cycl e wit h th e followin g components/system s a t thei rmalfunctio n criteri a limit s as determine d b yth e manufacturer : (2.1 ) Oxyge n Sensors

. Th e manufacture rshal l conduc t th e followin g demonstratio n tests : Th e firs t tes t involve s testin g al l primar yan d secondar

y(i f equipped ) oxyge n sensors use d fo rfue l contro l simultaneousl ypossessin g norma l outpu t voltag e bu t respons e rat e deteriorate d t o th e malfunctio n criteri a limi t (secondar yoxyge n sensor

s fo rwhic h respons e rat e i s no t monitore d shal l b e wit h norma l respons e characteristics)

. Th e secon d tes t shal l includ e testin g wit h al l primar yan d secondar

y(i f equipped ) oxyge n sensors use d fo rfue l contro l simultaneousl ypossessin g outpu t voltag e a t th e malfunctio n criteri a limit

. Manufacturer s shal l als o conduc

t a malfunctio n criteri a demonstratio n tes t fo ran yother-oxyge n senso rparamete rthat ca n caus e vehicl e emission s t o excee d 1. 5 time s th e applicabl e standard s (e.g. , shif t i n air/fue l rati o a

t whic h oxyge n senso rswitches)

. Whe n performin g additiona l test(s) , al l primar yan d secondar y(i f equipped ) oxyge n sensor s use d fo rfue l contro l shal l b e operatin g a t th e malfunctio n criteri a limi t fo rth e applicabl e paramete ronly

. Al l othe rprimar yan d secondar yoxyge n senso rparameter s shal l be wit h norma l characteristics

. Th e Executiv e Office rma

yapprove othe rdemonstratio n protocol s i f th e manufacture rca n adeguatel yshowcomparabl e assurance that th e malfunctio n criteri a ar e chose n base d o n meetin g emissio n requirements

. (2.2 ) EG R System : Th e manufacture rshal l conduc t onl yon e flo wrate demonstratio n tes t a t th e lowflo wlimit

. (2.3 ) Fue l Meterin g System : (2.3.1 ) Fo rvehicle s wit h short-ter m o rlong-ter m fue l tri m circuitry , th e manufacture r shal l conduc

t on e demonstratio n tes t a t th e borde rof th e rich limi t an d on e demonstratio n tes t a

t th e borde rof th e lea n limi t establishe d b yth e manufacture r fo remissio n compliance

. (2.3.2 ) Fo rothe rsystems , th e manufacture rshal l conduc t a demonstratio n tes t a t th e criteri a limit(s)

. (2.3.3 ) Fo rpurpose s o f th e demonstration , th e fault(s ) induce d ma yresul t i n a unifor m distributio n o f fue l an d ai ramon g th e cylinders

. Non-unifor m distributio n o f fue l an d ai ruse d t o induc e a faul t shal l not caus e a n indicatio n of misfire

. Th e manufacture rshal l describ e th e fault(s ) induce d i n th e fue l syste m causin g i t t o operat e a

t th e criteri a limit(s ) fo rth e demonstratio n tes t (e.g. , restricte d o r increase d flo wfue l injectors , a n altere d outpu t signa l airflowmeter , etc.)

. Compute rmodification s t o caus e th e fue l syste m t o operat e a t th e adaptiv e limi t fo rmalfunctio n shal l no

t be allowe d fo rth e demonstratio n tests

.

2 6 

# 3 ^P.3 8

(2.4 ) Misfire : Th e manufacture rshal l conduc t on e FT P demonstratio n tes t a t th e criteri a limi t specifie d i n (b)(3.2)(B ) fo rmalfunctio n an d a secon d .demonstratio n tes t showin g tha t th e vehicl e i s capabl e o f passin g a Californi a Inspection/Maintenanc e tes t whe n operatin g at th e misfir e criteri a limit

. Thi s demonstratio n i s no t require d fo rdiese l applications

. (2.5 ) SecondaryAi rSystem : Th e manufacture rshal l conduc t a flo wrat e demonstratio n tes t a t th e lo wflo wlimit , unles s onl ya functiona l chec k i s permitte d accordin g t o sectio n .DM5.2.2)

. (2.6 ) Catalys t Efficiency : (2.6.1 ) Non-Lo wEmissio n Vehicles : Th e manufacture rshal l conduc t a baselin e FT P tes t wit h a representativ e 400 0 mil e catalys t syste m followe d b yon e FT P demonstratio n tes t usin g a catalys t syste m deteriorate d to ' it s malfunctio n limit

. I f a manufacture ri s employin g a stead ystat e catalys t efficienc ychec k i n accordance wit h sectio n (b ) (1.2.4) , demonstratio n ofth e catalys t monitorin g syste m i s no t required

. (2.6.2 ) Lo wEmissio n Vehicles : Th e manufacture rshal l conduc t a catalys t efficienc y demonstratio n usin g a catalys t syste m deteriorate d t o withi n th e malfunctio n criteria

. If,tw o substrate s ar e integrate d int o th e sam e container , onl yth e upstrea m substrat e shal l b e deteriorate d fo rth e demonstration

. (2.7 ) Heate d Catalys t Systems : Fo rheate d Gatalyst system s tha t us e a n afto rstar t heatin g strategy , t Th e manufacture rshal l conduc t a demonstratio n tes t where.vth e designate d heatin g temperatur e i s reache d at th e tim e limi t fo rmalfunctio n afte rengin e starting

. (2.8 ) Manufacturer s ma yelectronicall ysimulat e deteriorate d components , bu t ma yno t mak e an yvehicl e contro l uni t modification s whe n performin g demonstratio n tests

. Al l equipmen t necessaryt o duplicat e th e demonstratio n tes t mus t b e mad e availabl e t o th e AR B upo n request

. (3.0 ) PRECONDITIONING Th e manufacture rshal l us e th e firs t engin e start portio n o f on e applicabl e FT P cycl e fo rpreconditionin g befor e eac h o f th e abov e emissio n tests

. I f a manufacture rsaft-prdvide s dat a and/o ra n engineerin g evaluatio n whic h adeguatel y demonstrat e tha t additiona l preconditionin g i s necessaryt o stabiliz e th e emissio n contro l system , th e Executiv e Office rshal l allo wa n additiona l identica l preconditionin g cycle , o ra Federa l Highwa yFue l Econom yDrivin g Cycle , followin g a ten-minut e (o r2 0 minute s fo rmediu m dut yengine s certifie d o n a n engin e dynamometer ) ho t soa k afte r th e initia l preconditionin g cycle

. Th e manufacture rshal l no t reguir e th e demonstratio n vehicl e t o b e col d soake d prio rt o conductin g preconditionin g cycle s i n orde rfo rth e monitorin g svste m demonstratio n t o b e successful

. Acold start shall not bo roquirod prior to conducting

preconditioning

cyclos.

2 7 

# 3 7E3H-



### (4.0 ) EVALUATIO N PROTOCO L (4.1 ) Wit h th e exceptio n of short-ter m tri m onl yvehicles , tTh e manufacture rshal l se t th e syste m o rcomponen f fo rwhic h detectio n i s t o b e demonstrate d a t th e criteri a limit(s ) fro m th e beginnin g o f an d throughou t th e prio rt o conductin g th e applicabl e preconditionin g cycle(s ) an d FT P te6t

. (Fo rmisfire demonstration , misfire shal l b e set a t it s criteri a limi t a s specifie d pursuan t t o sectio n (b)(3.2)(B))

. I f a secon d preconditionin g cvcl e i s permitte d i n accordanc e wit h sectio n (3.0 ) above , th e manufacture rma

yadjus t th e demonstrate d svste m o rcomponen t before conductin g th e secon d preconditionin g cvcle : however , th e demonstrate d svste m o rcomponen t shal l no t b e replaced , modifie d o radjuste d afte rpreconditionin g has take n place

. (4.2 ) Fo rshort-ter m tri m onl yvehicles , th e fue l syste m shal l operat e a t th e criteri a limi t fro m th e beginnin g of closed-loo p operatio n fo rth e manufacturer-define d tim e interva l fo r determinin g malfunctio n (an d normall yotherwise ) fo rbot h th e applicabl e preconditionin g an d FT P tes t cycles

. Afte rpreconditioning , th e vehicl e shal l be operate d ove rth e firs t

. engin e star

t portio n of th e applicabl e FT P test t o allowfo rth e initia l detectio n of th e malfunction

. Thi s drivin g cvcl e ma vb e omitte d fro m th e evaluatio n protoco l i f i t i s unnecessary

. I f reguire d b vth e demonstrate d monitorin g strategy , a col d soa k ma vbe performe d prio rt o conductin g thi s drivin g cycle

. (4.3 ) Fo rmisfire demonstration , misfire shal l b e set a t its criteri a limi t a

s specifie d pursuan t t o sectio n (b ) (3.2 ) (B ) throughou t th e applicabl e preconditionin g cycl e an d FT P test

. Th e vehicl e shal l the n b e operate d ove ra ful l applicabl e FT P test

. (4.4 ) Fo ral l demonstrations , th e MI L shal l b e illuminate d before th e ho t star t portio n of th e fulLFT P tes t i n accordanc e wit h requirement s of subsectio n (b) : (4.4.1 ) I f th e MI L doe s not illuminat e whe n th e system s o rcomponents ar e se t a t thei r limit(s) , th e criteri a limi t o rth e OB D syste m i s not acceptable

. (4.4.2 ) Except fo rcatalys t efficienc ydemonstration , i f th e MI L illuminate s an d emission s d o not excee d 1. 5 time s an yof th e applicabl e FT P emissio n standards , n o furthe rdemonstratio n shal l b e required

. (4.4.3 ) Except fo rcatalys t efficienc ydemonstration , i f th e MI L illuminate s an d emission s excee d 1. 5 time s an yofth e applicabl e FT P emissio n standards , th e vehicl e shal l b e reteste d wit h th e component' s malfunctio n criteri a limi t valu e rese t suc h tha t vehicl e emission s are reduce d b yn o mor e tha n 3 0 percent

. Limi t valu e at a minimu m includes , i n th e cas e of oxyge n sensors , respons e rat e an d voltage ; fo r EG R systems , EG R flowrate ; fo rsecondar yai rsystems , ai rflowrate ; fo r short-ter m fue l trim

- onl ysystems , tim e interva l at th e fue l syste m rang e o f authoritylimit ; fo rlong-ter m fue l tri m systems , shift i n th e bas e fue l calibration ; fo rheate d catalys t systems , th e tim e limi t betwee n engin e startin g an d attainin g th e designate d heatin g temperature (i f a n after-star t heatin g strateg yi s used) ; an d fo rmisfire , percen t misfire

. Fo rth e OB D syste m t o b e approved , th e vehicl e must the n mee t th e abov e emissio n level s whe n teste d wit h th e faulty 2 8

'•.'.••-•.. " \ • - 3> r
_• ; .-.."- .components

. Th e MI L shal l no t illuminat e durin g thi s demonstration

.

(4.4.4 ) Fo rNon-LE V catalys t efficiencydemonstration , i f H C emission s d o no t increas e b ymor e than"1. 5 time s th e standar d fro m th e baselin e FT P tes t an d th e MI L i s illuminated , n o furthe rdemonstratio n shal l b e required

. However , i fH C emission s increas e b

ymore tha n 1. 5 time s th e standar d fro m th e baselin e FT P tes t an d th e MI L i s illuminated , th e vehicl e shal l b e reteste d wit h th e averag e FT P H C conversio n capabilit yo fth e catalys t syste m increase d b yn o mor e tha n 1 0 percen t (i.e. , 1 0 percen t mor e engin e ou t hydrocarbon s ar e converted)

. Fo r th e OB D syste m t o b e approved , th e vehicl e mus t the n mee t th e abov e emissio n level s whe n re-tested

. Th e MI L shal l no t illuminat e durin g thi s demonstration

. (4.4.5 ) Fo rLo wEmissio n Vehicl e catalys t efficiencydemonstration , i fH C emission s d o no t excee d th e applicabl e emissio n threshol d specifie d i n sectio n (b)(1.2.2 ) an d th e MI L i s illuminated , n o furthe rdemonstratio n shal l b e required

. However , i f H C emission s excee d th e threshol d an d th e MI L i s illuminated , th e vehicl e shal l b e reteste d wit h averag e FT P H C conversio n capabilit yo fth e catalvs t svste m increase d b vn o mor e tha n 5 percen t (i.e.

. 5 percen t mor e engin e ou t hydrocarbon s ar e converted)

. Fo rth e OB D I I svste m t o b e approved , th e vehicl e mus t the n mee t th e abov e emissio n level s whe n re-tested

. Th e MI L shal l no t illuminat e durin g thi s demonstration , i fcatalys t efficiencyi s withi n th e malfunctio n criteri a rang e ovo rth e FT P tes t an d th e MI L i s illuminated , n o furthe r demonstratio n i s required

. I f catalys t efficiencyfall s outsid e o fth e malfunctio n criteri a range , th e catalyst' s efficiencyshal l b e adjusted , o rth e oatalys t shal l b e replace d wit h anothe rdeteriorate d catalyst , an d th e syste m re-tested

. I fcatalys t efficiencyi s withi n th e malfunctio n criteri a rang e ove rth e FT P tes t an d th e MI L i s no t illuminated , th e oatalys t ma yb e deteriorate d furthe rbu t no t bolo wth e lowe rlimi t o fth o malfunctio n criteri a range , an d th e syste m retested

. l f th e catalyst' s efficienc yi s belo wth e lowe rlimi t o fth e malfunctio n criteri a rang e an d th e MI L i s no t illuminated , th e OB D syste m i s no t acceptable

. (4.5 ) I f a n OB D syste m i s determine d unacceptabl e b yth e abov e criteria , th e manufacture r ma yre-calibrat e an d re-tes t th e syste m o n th e sam e QDV vehicle

. An yaffecte d monitorin g system s demonstrate d prio rt o th e re-calibratio n shal l b e re-verified

. (h ) CERTIFICATIO N DOCUMENTATION ! Th e manufacture rshal l submi t th e followin g documentatio n fo reac h engin e famil yat th e tim e o f certification

. Wit h Executiv e Office r approval , on e o rmor e o f th e documentatio n reguirement s specifie d i n thi s sectio n ma v b e waive d o raltere d i f th e informatio n reguire d woul d b e redundan t o runnecessaril y burdensom e t o generate : (1 ) Awritte n descriptio n o f th e functiona l operatio n o fth e diagnosti csyste m t o b e include d i n Sectio n 8 o fmanufacturers ' certificatio n applications

.

2 9 

# -2*1P.4 1

(2 ) Atabl e providin g th e followin g informatio n fo reac h monitore d componen t o rsyste m (eithe rcomputer-sense d o r-controlled ) o f th e emissio n contro l system : i

. correspondin g faul t cod e ii

. monitorin g metho d o rprocedur e fo rmalfunctio n detectio n iii

. primarymalfunctio n detectio n paramete ran d it s typ e o foutpu t signa l iv

. faul t criteri a limit s use d t o evaluat e outpu t signa l o f primaryparamete r v
. othe rmonitore d secondar yparameter s an d condition s (i n engineerin g units ) necessaryfo rmalfunctio n detectio n vi

. monitorin g tim e lengt h an d frequenc yo f check s ^ vii

. criteri a fo rstorin g faul t cod e viii

. criteri a fo rilluminatin g malfunctio n indicato rligh t ix

. criteri a use d fo rdeterminin g ou t o frang e value s an d inpu t componen t rationalit y check s (3 ) Alogi cflowchar t describin g th e genera l metho d o fdetectin g malfunction s fo reac h monitore d emission-relate d componen t o rsystem

. T o th e exten t possible , abbreviation s i n Societ yo f Automotiv e Engineers ' (SAE ) J193 0 "Electrical/Electroni c System s Diagnosti cTerms , Definitions , Abbreviations , an d Acronyms" , September , 4994-June , 1993

. shal l b e used

. J193 0 i s incorporate d b yreferenc e herein

. Th e informatio n require d i n th e chart unde r(2 ) abov e ma yinstea d b e include d i n thi s flo wchart , provide d al l o fth e informatio n require d i n (2 ) i s included

. (4 ) Alistin g an d bloc k diagra m o f th e inpu t parameter s use d t o calculat e o rdetermin e calculate d loa d value s an d th e inpu t parameter s use d t o calculat e o rdetermin e fue l tri m values

. (5 ) Ascal e drawin g o f th e MI L an d th e fue l ca p indicato rlight , i f present , whic h specifie s locatio n i n th e instrumen t panel , wording , color , an d intensity

. (6 ) Emissio n tes t dat a specifie d i n subsectio n (g)

. (7 ) Dat a supportin g th e selecte d degre e o f misfire whic h ca n b e tolerate d withou t damagin g th e catalyst

. (8 ) Dat a supportin g th e limi t fo rth e tim e betwee n engin e startin g an d attainin g th e designate d heatin g temperatur e fo rafter-start heate d catalys t systems

. (9 ) Fo rLo wEmissio n Vehicles , dat a supportin g th e criteri a use d b yth e diagnosti c syste m fo restablishin g a 5 0 t o 6 0 percen t catalys t tota l H C efficienc ylevel , o ra 4 0 t o 5 0 percen t deterioratio n leve l t o indicat e a malfunctio n whe n catalvs t deterioratio n cause s emission s t o excee d th e applicabl e threshol d specifie d i n sectio n (b)(1.2.2)

. (10 ) Fo rNon-Lo wEmissio n Vehicles , dat a supportin g th e criteri a use d t o indicat e a malfunctio n whe n catalys t deterioratio n lead s t o a 1. 5 time s th e standar d increas e i n H C emissions

. I f a stead ystat e catalys t efficienc ychec k i s employe d i n accordanc e wit h sectio n (b)(1.2.4) , dat a supportin g th e criteri a use d b yth e diagnosti csyste m fo r establishin g a 6 0 t o 8 0 percen t catalys t efficienc yleve l shal l b e provide d instead

. 3 0

^

_P.4 2

(11 ) Dat a supportin g th e criteri a use d t o detec t evaporativ e purg e syste m leaks

. (12 ) Adescriptio n o f th e modifie d o rdeteriorate d component s use d fo rth e faul t simulatio n t o driv e th o fue l syste m t o th e criteri a limit(s ) fo rdemonstratin g fue l svste m complianc e wit h th e requirement s o fwit h respec t t o th e demonstratio n test s specifie d i n subsectio n (g)

. (13 ) Alistin g o f al l electroni cpowertrai n inpu t an d outpu t signals

. (134 ) An yothe rinformatio n determine d byth e Executiv e Office rt o b e necessar yt o demonstrat e complianc e wit h th e requirement s o f thi s section

.
(i ) IN-US E RECAL L TESTIN G PROTOCO L Th e manufacture rshal l adher e t o th e followin g procedure s fo rvehicle s subjec t t o in-us e recal l testin g require d b yth e ARB : (1 ) I f th e MI L illuminate s durin g a tes t cycl e o rdurin g a preconditionin g cycle , th e faul t causin g th e illuminatio n ma yb e identifie d an d repaire d followin g publishe d procedure s readil yavailabl e t o th e publi cincludin g th e independen t servic e sector

. (2 ) Th e tes t ma

yb e rerun , an d th e result s fro m th e repaire d vehicl e mayb e use d fo r emissio n reportin g purposes

. (3 ) I f a vehicl e contain s a par t whic h i s operatin g outsid e o fdesig n specification s wit h n o MI L illumination , th e part shal l no t b e replace d prio rt o emissio n testin g unles s i t i s determine d tha t th e part ha s bee n tampere d wit h o rabuse d i n suc h a wa ytha t th e diagnosti csvste m canno t reasonabl yb e expecte d t o detec t th e resultin g malfunction.

. (4 ) Failur e o f a vehicle , o rvehicle s o n average , t o mee t applicabl e emissio n standard s wit h n o illuminatio n o f th e MI L shal l no t byitsel f b e ground s fo rrequirin g th e OB D syste m t o b e recalle d fo rrecalibratio n o rrepai rsinc e th e OB D syste m canno t predic t precisel ywhe n vehicle s excee d emissio n standards

. (5 ) Adecisio n t o recal l th e OB D syste m fo rrecalibratio n o rrepai rwil l depen d o n factor s including , bu t no t limite d to , leve l o f emission s abov e applicabl e standards , presenc e o f identifiabl e fault yo rdeteriorate d component s whic h affec t emission s wit h n o MI L illumination , an d systemati cerroneou s activatio n ofth e MIL.

. Wit h respec t t o erroneou s activatio n o fth e MIL , th e manufacture rmayregues t Executiv e Office r approva l t o tak e actio n apar t fro m a forma l recal l (e.g. , extende d warrant yo ra servic e campaign ) t o correc t th e performanc e o f th e diagnosti cstrateg yo n in-us e vehicles

. I n considerin g a manufacturer' s reguest

. th e Executiv e Office rshal l conside rth e estimate d freguenc vo ffals e MI L activatio n in-use , an d th e expecte d effectivenes s i n relatio n t o a forma l recal l o fth e manufacturer' s propose d correctiv e actio n i n capturin g vehicle s i n th e field

. Fo r199 4 an d 199 5 mode l year s only , on-boar d diagnosti c syste m recal l shal l no t b e considere d fo rexcessiv e emission s withou t MI L illuminatio n (i f required ) an d faul t cod e storag e unti l emission s excee d 2. 0 time s an yo f th e applicabl e standard s i n thos e instance s wher e th e malfunctio n criterio n i s base d o n exceedin g 1. 5 time s an yofth e applicabl e standards

. Thi s highe remissio n threshol d

. 3 1 

# H(

### fo rrecal l shal l exten d u p t o th e 199 8 mode l yea rfo rTLE V application s (excep t fo r

catalvs t monitoring , fo rwhic h th e threshol d shal l exten d t o th e 200 0 mode l vear) , an d t o th e 200 0 mode l vea rfo ral l applicabl e monitorin g reguirement s o n LE V an d ULE V applications

. (6 ) Regardin g catalvs t svste m monitoring , unmonitore d catalyst s shal l b e normall yaged

. (j ) CONFIRMATORYTESTIN G Th e AR B ma yperfor m confirmator

ytestin g of manufacturers ' diagnosti csystem s fo rcompliance With requirement s of thi s sectio n i n accordanc e wit h malfunctio n criteri a submitte d i n th e manufacturer' s approve d certificatio n documentation

. Th e AR B o rits designe e ma yinstal l appropriatel ydeteriorate d o r malfunctionin g component s i n a n otherwis e properl yfunctionin g tes t vehicl e o f a n engin e famil yrepresente d b

yth e demonstratio n tes t vehicle(s ) (o rsimulat e a deteriorate d o r malfunctionin g componen t response ) i n orde rt o tes t th e fue l system , misfire detectio n system , oxyge n sensor , secondar yai rsystem , catalys t efficienc ymonitorin g system , heate d catalyst system , an d EG R syste m malfunctio n criteri a fo rcompliance wit h th e applicabl e emissio n constraint s i n thi s section

. Confirmator ytestin g t o verif

ytha t malfunctio n criteri a are se t fo rcompliance wit h emissio n requirement s of thi s sectio n shal l b e limite d t o vehicle s i n engin e familie s derive d fro m th e demonstratio n vehicle(s).

. Diagnosti csystem s of a representative sampl e of vehicle s whic h uniforml yfai l t o meet th e requirement s o

f thi s sectio n ma

ybe recalle d fo rcorrection

. (k ) STANDARDIZATIO N Standardize d acces s t o emission-relate d faul t codes , emission-relate d powertrai n tes t informatio n (i.e. , paramete rvalues ) a s outline d i n subsectio n (I) , emissio n relate d diagnosti cprocedures , an d store d freez e fram e dat a shal l b e incorporate d base d o n th e industr yspecification s reference d i n thi s regulation

. (1.0 ) Eithe rSA E Recommende d Practice J1850 , "Clas s B Data Communicatio n Networ k Interface" , August , 190 1 May , 1994

. o rIS O 9141_ 2 GARB , "Roa d vehicle s - Diagnosti cSystem s - CAR B Requirements fo rInterchang e of Digita l Information, " February , 1994 , whic h ar e incorporate d b

yreference , shal l b e use d as th e on-board t o off-board networ k

communication s protocol

. Al l SA E J197 9 emissio n relate d message s sen t t o th e J197 8 sca n too l ove ra J185 0 dat a lin k shal l us e th e Cycli c

. Redundanc

yChec k an d th e thre e byt e header , an d shal l not us e inter-byt e separatio n o rchecksums

. (2.0 ) J197 8 & J197 9 Standardizatio n of th e messag e conten t (includin g tes t mode s an d tes t messages ) as wel l as standardizatio n of th e downloadin g protoco l fo rfaul t codes , paramete rvalue s an d thei runits , an d freez e fram e dat a are se t fort h i n SA E Recommende d Practice s o n "OB D I I Sca n Tool " (J1978) , March

. 1992 June , 1994 , an d "E/ E Diagnosti cTes t Modes " (J1979) , December

. 199 1 Jun e 1994

. whic h hav e bee n incorporate d byreference

. Faul t codes , paramete rvalues , an d freez e fram e dat a shal l b e capabl e of bein g downloade d t o a generi csca n too l meetin g thes e SA E specifications

. (2.1 ) Manufacturer

s shal l mak

e readil yavailabl e a

t a fai ran d reasonabl e pric e t o th e automotive repai rindustr yvehicl e repai rprocedure s whic h alloweffectiv e emissio n relate d diagnosi s an d repair s t o b e performe d usin g onl yth e J197 8 generi csca n too l

3 2an d commonl yavailable , non-microprocesso rbase d tools

. I n additio n t o thes e

procedures , manufacturer s ma ypublis h repai rprocedure s referencin g th e us e o f manufacture rspecifi co renhance d equipment

. (2.2 ) Th e J197 8 sca n too l shal l b e capabl e o f notifyin g th e use rwhe n on e o rmor e o fth e require d monitorin g system s ar e no t include d a s part o f th e OB D system

. (3.0 ) J201 2 Part C Unifor m faul t code s base d o n SA E specification s shal l b e employed

. SA E "Recommende d Forma t an d Message s fo rDiagnosti cTroubl e Codes " (J2012) , Marc h January , 199 2 1994 , i s incorporate d b yreference

. (4.0 ) J196 2 Astandar d dat a lin k connecto ri n a standard locatio n i n eac h vehicl e base d o n SA E specification s shal l b e incorporated

. Th e locatio n o fth e connecto rshal l b e easil y identifie d b ya technicia n enterin g th e vehicl e fro m th e driver' s side

. An ypin s i n th e standar d connecto rtha t provid e an yelectrica l powe rshal l b e properl yfuse d t o protec t th e integrit yan d usefulnes s o fth e diagnosti cconnecto rfo rdiagnosti cpurposes

. Th e SA E Recommende d Practic e "Diagnosti cConnector " (J1962) , June , 1992 , i s incorporate d b yreference

. (5.0 ) Wit h Executiv e Office rapproval , medium-dut vvehicle s mavalternativel yemplo yth e communicatio n protocol s establishe d i n SA E Recommende d Practic e J193 9 t o satisf y th e standardizatio n reguirement s specifie d i n section s (k)(1 ) throug h (k)(4 ) above

. Th e Executiv e Officer' s decisio n shal l b e base d o n th e effectivenes s o fth e SA E J193 9 protoco l i n satisfyin g th e diagnosti cinformatio n reguirement s o f Sectio n 1968. 1 i n compariso n wit h th e abov e reference d documents

. (I ) SIGNA L ACCES S (1.0 ) Th e followin g signal s i n additio n t o th e require d freez e fram e informatio n shal l b e mad e availabl e o n deman d throug h th e seria l por t o n th e standardize d dat a lin k connector : calculate d loa d value , diagnosti ctroubl e codes , engin e coolan t temperature , fue l contro l syste m statu s (ope n loop , close d loop , other ; i feouippe d wit h close d loo p fue l control) , fue l tri m (i f equipped) , fue l pressur e (i f available) , ignitio n timin g advanc e (i f eouipped) , intak e ai rtemperatur e (i f equipped) , manifol d ai r pressur e (i f equipped) , ai rflo wrat e fro m mas s ai rflo wmete r(i fequipped) , engin e RPM , throttl e positio n senso routpu t valu e (i f equipped) , secondaryai rstatu s (upstream , downstream , o ratmosphere ; i f equipped) , an d vehicl e spee d (i f equipped)

. Th e signal s shal l b e provide d i n standard unit s base d o n th e SA E specification s incorporate d b yreferenc e i n thi s regulation , an d actua l signal s shal l b e clearl y identifie d separatel yfro m defaul t valu e o rlim p hom e signals

. (2.0 ) Th e manufacture rshal l publis h i n factoryservic e manual s a norma l rang e fo rth e calculate d loa d valu e an d mas s ai rflo wrat e (i favailable ) at idle , an d a t 250 0 RP M (n o load , i n neutra l o rpark)

. I f 250 0 RP M i s outsid e o f th e operatin g rang e o f th e engine , th e correspondin g dat a mayb e omitted

. I f th e tota l fue l comman d tri m i s mad e u p b ymor e tha n on e sourc e (e.g

. short-ter m tri m an d long-ter m trim) , al l fue l tri m signal s shal l b e available

. Th e signal s shal l b e provide d i n standar d unit s base d o n th e incorporate d SA E specifications , an d actua l signal s shal l b e clearl yidentifie d
-3 3
4 3

_. ' • " - •
. . •

### separatel yfro m defaul t valu e o rlim p hom e signals

. Diese l vehicle s shal l b e exemp t

fro m thi s reguirement

. (3.0 ) Oxyge n senso rdat a that wil l allowdiagnosi s o f malfunctionin g oxyge n sensors shal l b e provide d throug h seria l data por t o n th e standardize d dat a link

. I n addition , beginnin g wit h th e 199 6 mode l vea r(wit h ful l compliance reguire d b vth e 199 7 mode l year) , fo ral l monitore d components an d systems , excep t misfire detection , fue l svste m monitoring , an d comprehensive componen t monitoring) , results of th e most recen t tes t performe d b

yth e vehicle , an d th e limit s t o whic h th e syste m i s compare d (excep t fo rcontinuousl ymonitore d systems/components ) shal l be availabl e throug h th e seria l dat a por

t o n th e standardize d dat a lin k connector

. Fo rth e monitore d component s an d system s excepte d above , a pass/fai l indicatio n fo rth e most recen t tes t result s shal l b e availabl e throug h th e dat a lin k

. Suc h dat a shal l b e transmitte d i n accordanc e wit h SA E J197 9 (o rSA E J1939 , whicheve rapplies)

. Alternativ e method s shal l b e approve d byth e Executive Office rif , i n th e judgmen t of th e Executiv e Officer , the yprovid e fo requivalen t off-boar d evaluation

. (m),IMPLEMENTATIO N SCHEDUL E (1.0 ) Thes e OB D I I requirements , except evaporative purg e syste m monitorin g (so o sectio n (b ) (4.1.5) ) unles s otherwis e specified , shal l b e implemente d beginnin g wit h th e 199 4 mode l year

. (2.0 ) Th e Executive Officer'shal l gran t a n extensio n fo rcompliance wit h th e requirement s of thes e subsection s wit h respec t t o a specifi cvehicl e mode l o rengin e famil yi f th e vehicl e mode l o rengin e famil ymeets previousl yapplicabl e on-boar d diagnosti c syste m requirement s an d a manufacture rdemonstrate s that i t cannot modif ya presen t electroni ccontro l syste m b yth e 199 4 model-yea rbecaus e majo rdesig n syste m change s not consisten t wit h th e manufacturer' s projecte d changeove rschedul e woul d b e neede d t o compl ywit h provision s of thes e subsections

. (2.1 ) Th e manufacture rwhic h has receive d a n extensio n fro m th e Executive Office rshal l compl ywit h thes e regulation s whe n modificatio n of th e electroni csyste m occurs i n accordanc e wit h th e manufacturer' s projecte d changeove rschedul e o ri n th e 199 6 mode l year , whicheve rfirs t occurs

. (2.2 ) An ymanufacture rrequestin g a n extensio n shall , n o late rtha n Octobe r15 , 1991 , submi t t o th e Executiv e Office ra n applicatio n specifyin g th e perio d fo rwhic h th e extensio n i s required

. (3.0 ) Smal l volum e manufacturers a s define d i n (n ) (13.0 ) shal l meet thes e requirement s b y th e 199 6 mode l year

. (4.0 ) Manufacturer

s ma yat thei rdiscretio n implemen t a portio n of thes e regulation s prio rt o th e require d implementatio n dat e provide d that th e syste m complie s wit h previousl y applicabl e on-board diagnosti csyste m requirements

.

3 4 

# 44 -(5.0 ) - Vehicle s certifie d t o ru n o n alternat e fuels , an d dDiese l vehicles Tshal l mee t thes e requirement s b yth e 199 6 mode l year

. Manufacturer s ma yreques t a dela yi n th e implementatio n o fthes e requirement s fo rdiese l vehicle s unti l 1997 , subjec t t o Executiv e Office rapproval , i fi t i s adeguatel ydemonstrate d tha t th e dela ywil l allo wfo r th e developmen t o fsignificantl ymor e effectiv e monitorin g systems. (5.1 ) Vehicle s an d engine s certifie d t o ru n o n alternat e fuel s shal l mee t thes e reguirement s b vth e 199 6 mode l year

. However , manufacturer s ma yregues t th e Executiv e Office r t o waiv e specifi cmonitorin g reguirement s fo rwhic h monitorin g ma yno t b e reliabl e wit h respect t o th e us e o f alternat e fuel s unti l th e 199 9 mode l year

. (5.2 ) Medium-dut vvehicle s wit h engine s certifie d o n a n engin e dynamomete rma vcompl y wit h thes e requirement s o n a n engin e mode l vea rcertificatio n basi s rathe rtha n o n a vehicl e mode l basis

. (6.0 ) Th e Executiv e Office rmaywaiv e on e o rmor e o f th e requirement s o f thes e subsection s wit h respec t t o a specifi cvehicl e o rengin e famil yfo rwhic h productio n commence s prio rt o Apri l 1 , 1994 , an d whic h i s no t otherwis e exempte d fro m complianc e i n accordanc e wit h section s (2.0 ) an d (2.1 ) above

. I n grantin g a waiver , th e Executiv e Office rshal l conside rth e followin g factors : th e exten t t o whic h thes e requirement s ar e satisfie d overal l o n th e vehicl e application s i n question , th e exten t t o whic h th e resultan t diagnosti csyste m desig n wil l b e mor e effectiv e tha n system s develope d accordin g t o sectio n 1968 , Titl e 13 , an d a demonstrate d good-fait h effort t o mee t thes e requirement s i n ful l b yevaluatin g an d considerin g th e bes t availabl e monitorin g technology

. (6.1 ) Fo r199 5 an d 199 6 mode l yea rvehicle s fo rwhic h productio n i s t o commenc e subsequen t t o Marc h 31 , 1994 , an d whic h ar e no t exempte d fro m complianc e i n accordanc e wit h section s (2.0 ) an d (2.1 ) above , th e Executiv e Officer , upo n receip t o f a n applicatio n fro m th e manufacturer , maycertif yth e vehicle s i n questio n eve n thoug h sai d vehicle s ma yno t compl ywit h on e o rmor e o f th e requirement s o f thes e subsections

. Suc h certificatio n i s contingen t upo n th e manufacture rmeetin g th e criteri a se t fort h i n sectio n (6.0 ) above

. Manufacturer s o fnon-complyin g system s shal l b e subjec t t o fines pursuan t t o sectio n 4301 6 o fth e Californi a Healt h an d Safet yCod e fo reac h deficienc yidentified , afte rth e second , i n a vehicl e model

. Fo rth e thir d deficienc yan d ever ydeficienc ythereafte ridentifie d i n a vehicl e model , th e fines shal l b e i n th e amoun t o f $5 0 pe rdeficienc yper

. vehicl e fo rnon-complianc e wit h an yo fth e monitorin g requirement s specifie d i n subsection s (b)(1 ) throug h (b)(9) , an d $2 5 pe r deficienc ype rvehicl e fo rnon-complianc e wit h an yothe rrequiremen t o fsectio n 1968.1

. I n determinin g th e identifie d orde ro fdeficiencies , deficiencie s o fsubsection s (b)(1 ) throug h (b)(9 ) shal l b e identifie d first

. Tota l fines pe rvehicl e unde rthi s sectio n shal l no t excee d $50 0 pe rvehicl e an d shal l b e payabl e t o th e Stat e Treasure rfo r deposi t i n th e Ai rPollutio n Contro l Fund

. Engin e familie s i n receip t o fa waive r grante d unde rsectio n (6.0 ) abov e shal l b e exemp t fro m thes e fines. Further , smal l volum e manufacturer s choosin g t o compl ywit h thes e requirement s i n th e 199 5 mode l yea rshal l als o b e exemp t fro m thes e fines. Fo r199 6 mode l vea rvehicle s an d engine s onlv

. failur e t o properl ymonito rmultipl e electroni ctransmissio n component s shal l b e considere d a singl e monitorin g svste m deficiency

. 3 5 

# ITP.4 7



### (6.2 ) Beginnin g wit h th e 199 7 mode l vea ran d throug h th e 200 0 model , th e certificatio n provision s se

t fort h i n sectio n (m)(6.1 ) above shal l continu e t o appl ysubject t o th e followin g limitations : 1 ) Th e specifie d fine s shal l appl yt o th e secon d an d subsequentl yidentifie d deficiencies , wit h th e exceptio n that fine s shal l appl yt o al l monitorin g svste m deficiencie s wherei n a require d monitorin g strateg yi s completel y absen t fro m th e OB D svstem , an d 2 ) Manufacturer s ma ynot carr yove rmonitorin g svste m deficiencie s t o future mode l vear s unles s i t ca n b e demonstrate d tha t vehicl e hardware modification s woul d be necessar yt o correc

t th e deficiency , i n whic h cas e th e deficienc

yma vb e carrie d ove rfo ron e mode l vear

. (n ) GLOSSARYFo rpurpose s of thi s section : (1.0 ) "Malfunction " mean s th e inabilit yof a n emission-relate d componen t o rsyste m t o remai n withi n desig n specifications

. Further , malfunctio n refer s t o th e deterioratio n of an yof th e above component s o rsystem s t o a degre e that woul d likel ycaus e th e emission s o

fa n averag e certificatio n durabilit yvehicl e wit h th e deteriorate d components o rsystem s presen t a t th e beginnin g of th e applicabl e certificatio n emissio n tes t t o excee d b ymor e tha n 1. 5 time s an yofth e emissio n standard s (bot h wit h respec

t t o th e certificatio n an d usefu l lif e standards) , unles s otherwis e specified , applicabl e pursuan t t o Subchapte r1 (commencin g wit h Sectio n 1900) , Chapte r3 of Titl e 13

. (2.0 ) "Secondar

yair " refers t o ai rintroduce d int o th e exhaust syste m b ymean s of a pum p o raspirato rvalv e o rothe rmean s that i s intende d to ai d i n th e oxidatio n of H C an d C O containe d i n th e exhaust gas stream

. (3.0 ) "Engin e misfire " mean s lac k of combustio n i n th e cylinde rdu e t o absenc e o f spark , poo rfue l metering , poo rcompression , o ranyothe rcause

. (4.0 ) Oxyge n senso r"respons e rate " refer s t o th e dela

y(measure d i n milliseconds ) betwee n a switc h o f th e senso rfro m lea n t o rich o rvic e vers a i n respons e t o a chang e i n fuel/ai rrati o above an d belowstoichiometric

. (5.0 ) A"trip " mean s vehicl e operatio n (followin g a n engine-of f period ) o

f duratio n an d drivin g mod e suc h tha t al l components an d system s are monitore d a t leas t onc e b

y th e diagnosti csyste m excep t catalyst efficienc yo revaporative syste m monitorin g whe n a steady-spee d chec k i s used , subjec

t t o th e limitatio n that th e manufacturer-define d tri p monitorin g condition s shal l al l b e encountere d at leas t onc e durin g th e first engin e star t portio n of th e applicabl e FT P cycle

. (6.0 ) A"warm-u p cycle " mean s sufficien t vehicl e operatio n suc h that th e coolan t temperature ha s rise n b ya t least 4 0 degree s Fahrenhei t fro m engin e startin g an d reache s a minimu m temperature of 16 0 degree s Fahrenheit

. (7.0 ) A"drivin g cycle " consist s of engin e startup , vehicl e operatio n beyon d th e beginnin g of close d loo p operation , an d engin e shutoff

.

3 6(8.0 ) "Continuou s monitoring " mean s samplin g a t a rat e n o les s tha n tw o sample s pe r second

. I f fo rengin e contro l purposes , a compute rinpu t componen t i s sample d les s freguently

. th e valu e o f th e componen t ma vinstea d b e evaluate d eac h tim e samplin g occurs

. (9.0 ) "Fue l trim " refer s t o feedbac k adjustment s t o th e bas e fue l schedule

. Short-ter m fue l tri m refer s t o dynami co rinstantaneou s adjustments

. Long-ter m fue l tri m refer s t o muc h mor e gradua l adjustment s t o th e fue l calibratio n schedul e tha n short-ter m tri m adjustments

. Thes e lon g ter m adjustment s compensat e fo rvehicl e difference s an d gradua l change s tha t occu rove rtime

. (10.0 ) "Bas e Fue l Schedule " refer s t o th e fue l calibratio n schedul e programme d int o th e Powertrai n Contro l Modul e o rPRO M whe n manufacture d o rwhe n update d b ysom e off-boar d source , prio rt o an ylearne d on-boar d correction

. (11.0 ) "Calculate d loa d value " refer s t o a n indicatio n o fth e curren t airflo wdivide d b ypea k airflow , wher e pea k

airflo wi s correcte d fo raltitude , i favailable

. Thi s definitio n provide s a unitles s numbe rtha t i s no t engin e specific , an d provide s th e servic e technicia n wit h a n indicatio n o fth e percen t engin e capacit ytha t i s bein g use d (wit h wid e ope n throttl e a s 100%)

.

Curren t Airflo wAt m Pressur e ( @ se a level ) CLV = • X

Pea k airflo w( @ se a level ) Barometri cpressur e
Fo rdiese l applications , th e calculate d loa d valu e shal l b e determine d b yth e rati o o f curren t outpu t torgu e t o maximu m outpu t torgu e a t curren t engin e speed

. (12.0 ) "Medium-dut yvehicle " i s define d i n Titl e 13 , Sectio n 190 0 (b)(9)

. (13.0 ) "Smal l volum e manufacturer " shal l mea n an yvehicl e manufacture rwit h sale s les s tha n o requa l t o 300 0 ne wlight-dut yvehicle s an d medium-dut yvehicle s pe rmode l yea rbase d o n th e averag e numbe ro fvehicle s sol d b yth e manufacture reac h mode l yea rfro m 198 9 t o 1991

. Fo rmanufacturer s certifyin g fo rth e firs t tim e i n California , mode l yea rsale s shal l b e base d o n projecte d Californi a sales

. (14.0 ) "Lo wEmissio n Vehicle " refer s t o a vehicl e certifie d i n Californi a a s a Transitiona l Lo w Emissio n Vehicl e (TLEV) , a Lo wEmissio n Vehicl e (LEV) , o ra n Ultr a Lo wEmissio n Vehicl e (ULEV)

. Thes e vehicl e categorie s ar e furthe rdefine d i n Titl e 13 , section s 1956. 8 an d 1960.1

. (15.0 ) "Diese l engines" , fo rth e purpose s o fthes e regulations , include s diese l derive d refer s tp_engine s an d thos e usin g a compressio n ignitio n thermodynami ccycle

. (16.0 ) "Functiona l check " fo ra n outpu t componen t mean s verificatio n o fprope rrespons e t o a compute rcommand

. Fo ra n inpu t component , functiona l chec k mean s verificatio n o f th e inpu t signa l bein g i n th e rang e o fnorma l operation , includin g evaluatio n o fth e signal' s rationalit yi n compariso n t o al l availabl e information

. 3 7 • - 

### HI : 

### - • -P.4 9



### (17.0 ) "Federa l Test Procedure " (FTP ) cycl e o rtest refer s to , fo rpassenge rvehicles , light-dutytrucks , an d medium-dut yvehicle s certifie d o n a chassi s dynamometer, , th e drivin g schedul e i n Cod e of Federa l Regulation s (CFR) 40 , Appendi x1 , Par t 86 , sectio n (a) entitled , "EPAUrba n Dynamomete rDrivin g Schedul e fo rLight

- Dut y Vehicle s an d Light-DutyTrucks. " Fo rmedium-dut yengine s certifie d o n a n engin e dynamometer , FT P cycl e o rtest refer s t o th e engin e dynamomete rschedul e i n CF R 40 , Appendi x1 , Par

t 86 , sectio n (f)(1) , entitled , "EP AEngin e Dynamomete rSchedul e fo rHeavy-Dut

yOtto-Cycl e Engines, " o rsectio n (f)(2) , entitled , "EPAEngin e Dynamomete rSchedul e fo rHeavy-Dut yDiese l Engines. " (18.0 ) "Redlin e engin e speed " mean s th e manufacture rrecommende d maximu m engin e spee d a s normall ydisplaye d o n instrumen t pane l tachometers , o rth e engin e spee d a t whic h fue l shutof

f occurs

. (19.0 ) "Powe rTake-Of

f unit " refer

s t o a n engin e drive n outpu t provisio n fo rth e purpose s of powerin g auxiliar

yeguipmen t (e.g. , a dump-truc k bed , aeria l bucket , o rtow-truc k winch)

.
Note : Authoritycited : Section s 39600 , 39601 , 4301 3 an d 43018 , Healt h an d SafetyCode

. Reference : Section s 39002 , 39003 , 43013 , 43100 , 43101 , 43102 , 43104 , 4310 5 an d 43204 , Healt h an d Safet

yCode

.

3 8 

# ijZ• _ STAT E -O F CALIFORNIA PET E WILSON , Governo r AI RRESOURCE S BOAR D 202 0 L STREE T P.O
. BO X281 5 SACRAMENTO , C

A 9581 2

STATEMEN T R E MAILIN G NOTIC E O

F AVAILABILIT Y O

F MODIFIE D TEX T



### O n Apri l 3 , 199 5
. , th e Ai r Resource s Boar dmaile dth e attache dNOTIC E O F AVAILABILIT YO F MODIFIE DTEX T t o thos e person s specifie d
i nsectio n44 , subsection s (a)(1 ) throug h(4 ) Titl e 1 , CCR , a s require db y sectio n44 , Titl e 1 , CCR . Inaddition , th e notic e wa s availabl e t o th e publi c fro m

Apri l 3 , 199 5 throug hApri l 18 , 199 5 a t th e Publi c Informatio nOffic e o f th e Ai r Resource s Board , 202 0 L Street , Firs t
Floor , Sacramento , California .

Date : Apri l 26 , 199 5 

### Artrrf.tfH. Edward s Regulation s Coordinato r

Attachmen t



# <fiP.5 1

._.

_MAI L OU T #95-1 2 .
Stat e o f Californi a • AI RRESOURCE S BOAR D Notic e o f Publi c Availabilit y o f Modifie dTex t andSupportin g Document s andInformatio n
PUBLI C HEARIN GT O CONSIDE RAMENDMENT S T O REGULATION S REGARDIN GON-BOAR DDIAGNOSTI C SYSTE M REQUIREMENT S FO R199 4 AN DLATE RPASSENGE RCARS , LIGHT-DUT YTRUCKS ,

AN DMEDIUM-DUT YVEHICLE S AN DENGINE S

Publi c Hearin g Date : Decembe r 8 , 199 4 Firs t Publi c Availabilit y Date : Januar y

19 , 199 5 Deadlin e fo r Publi c Comment : Februar y 3 , 199 5 Secon dPubli c Availabilit y Date : Apri l 3 , 199 5 Deadlin e fo r Publi c Comment : Apri l 18 , 199 5

A t a publi c hearin g hel dDecembe r 8 , 1994 , th e Ai r Resource s Boar d(th e "Board" ) considere damendment s t o section s 1968. 1 and2030-2031 , Titl e 13 , Californi a Cod e o f Regulation s ("CCR") . Th e propose damendment s woul dimprov e th e overal l effectivenes s o f th e OB DI I requirement s whil e addressin g implementatio nconcern s expresse db y manufacturers . Th e propose dregulator y actio ni s describe di ndetai l i nth e Staf f Report , release dOctobe r 21 , 1994 .
A t th e hearing , th e Boar dapprove damendment s t o section s 1968. 1 and 2030-2031 , Titl e 13 , CCR , an dth e document s incorporate dtherei nwit h modification s t o th e originall y propose dregulator y language . Thos e modification s wer e notice di nth e Notic e o f Availabilit y o f Modifie dText , issue donJanuar y

19 , 1995 , whic hwer e availabl e fo r publi c commen t throug h Februar y

3 , 1995 .
I nadditio nt o th e document s tha t wer e identifie di nth e Staf f Report , th e staf f ha s adde dt o th e rulemakin g recor dth e followin g Societ y o f Automotiv e Enginee r (SAE ) document s tha t staf f relie dupon , indevelopin g thes e regulations : Draf t SA E Recommende dPractic e J1939 , "Seria l Contro l andCommunication s Vehicl e Network" , Januar y 1994 . (Th e document' s titl e an dth e dat e o f th e draf t wer e inadvertentl y omitte dfrom

sectio n(k)(5.0 ) o f th e regulation . Sectio n(k)(5.0 ) ha s bee nmodifie dt o correctl y reflec t th e titl e anddate , an di s attache dhereto . Th e modification s reflectin g th e adde dlanguag e ar e indicate dby doubl e underline. )
Internationa l Standard s Organizatio n(ISO ) 9141-2 , "Roa dvehicle s - Diagnosti c System s - CAR B Requirement s fo r Interchang e o f Digita l Information" , Februar y 1994 . (Referenc e o f thi s documen t wa s inadvertentl y

omitte dfrom

th e Boar dHearin g Notice) . SA E 940975 , "Roa dTest s o f a Misfir e Detectio nSystem" , Willia m B . Ribben s an

dJaehon g Park , 199 4

SA E 920236 , "Miniatur e Maanetostrictiv e Misfir e Sensor" , Rober t D . Klaube r etal , 199 2

SA E 890486 , "Cylinde r b y Cylinde r Engin e Pressur e andPressur e Torqu e Wavefor m

Determinations . Utilizin g Spee dFluctuations" , Stephe nJ . Citron , Joh nE . 0'Higgins , andLillia nY . Chen , 1989 . 

### '•-•'. . r o •P.5 2



### Th e AR B i s als o addin g t o th e rulemakin g recor dth e followin g comment s an dinformatio n(muc ho f whic hha s bee nidentifie da s confidential ) tha t hav e bee nsubmitte dt o th e AR B b y moto r vehicl e manufacturer s an dothe r intereste dpartie s an

dtha t th e AR B staf f relie dupo ninadoptin g amendment s t o th e OB DI I regulations : Dat a provide db

y Chrysle r Corporatio no nMay 9 , 1994 , regardin g misfir e detectio ntes t results . Dat a provide db

y Genera l Motor s o

nMa y 11 , 1992 , an

dAugus t 31 , 1994 , regardin g evaporativ e system monitorin g requirements . Dat a provide db

y FordMoto r Company

regardin g misfir e detectio nan d catalys t monitoring , receive dJuly , 1994 . Mazd a applicatio nfo r 199 5 mode l yea r certification . Mitsubish i applicatio nfo r 199 5 mode l yea r certification . Th e tex t o f sectio n1968. 1 (k) , Titl e 13 , Californi a Cod e o f Regulations , wit hth e propose damendmen t t o complet e th e referenc e t o SAE J1939 , i s attached . Th e othe r material s reference dar e availabl e fo r publi c inspectio na t th e th e Mobil e Sourc e Divisio nOffice s at 952 8 Telstar , E l Monte , California . However , fo r informatio ntha t ha s beendesignate da s confidential , th e AR B wil l follow th e disclosur e policie s se t fort hinTitl e 17 , CCR , sectio n9100 0 e t seq . Inquirie s shoul db e mad e t o th e attentio no f Mr . Alle nLyons , (818 ) 575-6833 . Inaccordanc e wit hsectio n11346. 8 o f th e Governmen t Code , th e Boar d directe dth e Executiv e Office r t o adop t th e amendment s t o section s 1968. 1 an d2030-2 0 an

dth e document s incorporate db y referenc e there , a s approved , afte r makin g th e modifie dregulator y languag e an

dadditiona l supportin g document s an

dinformatio n(excludin g confidentia l information ) availabl e t o th e publi c fo r commen t fo r a perio do f a t leas t 1 5 days , provide dtha t th e Executiv e Office r shal l conside r suc hwritte ncomment s a s ma y b e submitte d durin g thi s period , shal l mak e suc hmodification s a s may b e appropriat e in ligh t o f th e comment s received , an dshal l presen t th e regulation s t o th e Boar dfo r furthe r consideratio ni f h e determine s tha t thi s i s warranted . Writte ncomment s mus t b e submitte dt o th e Boar dSecretary , Ai r Resource s Board , P.O . Box2815 , Sacramento , Californi a 95812 , no late r tha n Apri l 18 , 1995 , fo r consideratio nb y th e Executiv e Office r prio r t o fina l action . Onl y

comment s relatin g t o th e modification s o r supportin g document s an dinformatio ndescribe dinthi s notice , wil l be considere db y th e Executiv e Officer . Sincerely ,

K . D . Drachand , Chie f Mobil e Sourc e Divisio n Attachmen t 

# fl