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A . PUBLICATIO N O F NOTIC E (Complete for publication

in Notice Register) 1 . TOPI C O F NOTIC E OB D I I TITLE(S ) 1 3 FIRS TSECTD N AFFECTE D •1968. 1 2 . REQUESTE D PUBLICATIO N DAT E

Octobe r 21
. 199 4 3 . NOTIC E TYP E

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## Michael L
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regulations) 1
. SPECIF YCALIFORNI ACOD E O F REGULATION S TITLE(S ) AN D SECTION(S ) (Includlnq title 26, if toxlcs-relatm-i) TITLE(S ) 1 3 SECTION S AFFECTE D ADOP T
AMEN D 1968.1 , 2230 , 2231 , an d th e Document s Incorporate d b yReferenc e REPEA L
2 . TYP E O F FILIN G Regula rRulemakin g (Gov

. Code , §11346 ) 

# D Resubmit-
. • Change s Withou t RegulatoryEffect (Cal

. Cod e Regs. , titl e 1 , § 100 ) • Emergency(Gov

. Code , §1 1 § 11346.1(b) )

• Certificat e o fCompliance : Th e agencyoffice rname d belo wcertifie s tha t thi s agencycomplie d wit h th e provision s o fGovernmen t Cod e § § 11346. 4 -11346. 8 prio rto , o rwithi n 12 0 day s of , th e effectiv e dat e ofth e regulation s liste d above
. | I Prin t Onl y|_ J Othe r(specify ) 3 . DATE(S ) O F AVAILABILITYO F MODIFIE D REGULATION S AND/O R MATERIA L ADDE D T O TH E RULEMAKIN G FIL E (CaLCoda Regs. M B t §§

44 nnd 45) Januar y 19 , 199 5 - Februar y 3 , 199 5 an dApri l 3 , 199 5 - Apri l 18 , 199 5

* . EFFECTIV E DAT E O F REGUUTOR YCHANGE S (Go*. Co*» § I134&2)
• Etleetrv

e 30l h dayafte rI vI Effoesh - o n filin g wit h Wlna wit h Secretaryo l Stat e ____ " Secretaryo (Stat e 

# n Effective othe rfSoeciM 5 . CHEC KI F THES E REGUUTION S REQUIR E NOTIC E TO . O R REVIEW . CONSULTATION . APPROVA L O R CONCURRENC E BY . ANOTHE R AGENC YO R ENTIT YN/ A i - | Departmen t o fFinanc e (For m STD

. 399 ) [ ~ Fai rPolitica l Practice s Commissio n [~ ] Stat e Fir e Marsha l [ | Other(Specify

) 6 . CONTAC TPERSO N

Michae l L
. Terris , Senio rStaf fCounse l m TELEPHON E NUMBE R (916 ) 322-288 4 7
. 1 / certify that the attached

copy of the regulation(s)

Is a true and correct copy of the regulatlon(s)

identified

on this form, that

the Infonnatlon

specified

on this form is true and correct, and

that 1 am the head of the agency taking this action, or

a designee

of the head of the agency, and

am authorized

to make this certification. SIGNATUR E O F ^G*NC YHEA D OtVJESIGNE E ^^_^--<~ " DAT E Apri l 26 , 199 5 TYPED-NAM E ANCTITt - O F SIGNATOR Y
_ To m "Cackett e , "Chief

. Deput yExecutiv e Office r' "

# V P. 3

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1968. 1 Malfunctio n an d Diagnosti cSyste m Requirements-199 4 an d Subsequen t Model-Yea r

Passenge rCars , Light-DutyTrucks , an d Medium-Dut yVehicle s an d Engine s (a ) GENERA LREQUIREMENT 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 that wil l automaticall yinfor m th e vehicl e operato ri n th e even t o fa malfunctio n o fan ypowertrai n component s whic h ca n affect emission s an d whic h provid e inpu t to , o rreceiv e outpu t from , th e on-boar d computer(s ) o ro fth e malfunctio n o fth e on-boar d computer(s ) itself

. Th e MI Lshal l no t b e use d fo ran yothe rpurpose . (1.1 ) Th e MI Lshal l b e o fsufficien t illuminatio n an d locatio n t o b e readil yvisibl e unde ral l lightin g conditions
. Th e MI Lshal l illuminat e i n th e engine-ru n keypositio n befor e engin e crankin g t o indicat e that th e MI Li 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
. Altematively
. th e Internationa l Standard s Organizatio n (ISO ) engin e symbo l mavb 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 Lpursuan 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 fidentifyin g th e likel yare a of th e malfunctio n bymean s o ffaul 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
. Aglossaryof term s i s containe d i n subsectio n (n) 1 at th e en d ofthi 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
. (4-4)—Manufacturer s o fdiese l engine s utilizin g computer-base d electroni cpowertrai n contro l systems-shal l submi t a pla n fo rcomplyin g wit h thes e requirement s t o th e Executiv e Office rfo rapprova l a t less ' two 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 affect emission s an d fo r whic h reliabl e monitorin g technique s are availabl e at cost s comparabl e t o othe r engine s meetin g thes e requirements , an d o n meetin g al l othe rapplicabl e requirement s (e.g. , storin g freez e fram e conditions , meetin g standardizatio n requirements , etc.)

. (1.-54) Fo rLo wEmissio n Vehicle s (LEV) , th e Executiv e Office rshal l revis e th e emissio n threshol d fo ra malfunctio n o n an ychec k i fth e mos t reliabl e monitorin g metho d develope d require s a highe rthreshol d t o preven t significan t errors o fcommissio n i n

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

.P. 4

I 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 of1. 5 time s th e standard) , th e manufacture rmay perfor m onl ya functiona l chec k (define d i n sectio n (n)(16.0) ) ofa specifi ccomponen t o rsyste m i fdeterioratio n o rfailur e o fsuc h woul d no t 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 o ffedera l On-Boar d Diagnosti c (OBD ) requirement s shal l b e deeme d t o b e a n acceptabl e optio n fo rth e manufacture r fo rth e purpos e o fmeetin g thes e requirements
. (1.87 ) Fo r199 4 an d 199 5 mode l years only , illuminatio n ofth e malfunctio n indicato rligh t upo n detectio n o fa malfunctio n shal l b e optiona l fo rcatalyst , misfire , an d complet e evaporativ e syste m monitoring
. MI Lilluminatio n fo rsuc h vehicle s shal l b e optiona l fo r othe rmonitorin g requirements , subject t o Executiv e Office rapproval , o n th e basi s of us e ofa ne wmonitorin g strateg ywhic h i s significantl ydifferen t tha n tha t use d previousl yb yth e manufacture rand/o rwhic h entail s a hig h degre e o fsophisticatio n i n it s application
. Irrespectiv e ofth e precedin g th e MI Lshal l illuminat e o n thes e vehicle s i n accordanc e wit h sectio n 1968. 1 fo rlac k o ffunctio n (se e sectio n (n)(16.0) ) fo r electroni ccomponents/system s otherwis e approve d fo rno t 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 o fsectio n 1968.1
. Fo rcomponents/system s not requirin g illuminatio n o f th e MIL , manufacturer s shal l provid e a pla n fo rapprova l byth e Executiv e Office rfo r reportin g o n th e correc t performanc e ofth e monitorin g system s i n custome rus e a t 6 mont h interval s beginnin g fro m th e start ofproductio n eac h yea rfo rat leas t th e firs t thre e year s afte rproduction
. Approva l o fth e pla n shal l b e base d o n obtainin g a statisticall yvali d sampl e size , assurin g tha t adequat e resource s are availabl e t o investigat e th e potentia l problems , an d assurin g tha t a wid e varietyofvehicles , 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 ofth e diagnosti csyste m b e determine d b yth e Executiv e Office r o n th e basi s o fthes 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 rthe yshal l submi t a n alternat e pla n fo rremedyin g th e proble m fo rapprova l by th e Executiv e Office ro n th e basi s o fachievin g comparabl e captur e rate s an d timelines s a s a n officia l recal l plan
. (1.98 ) Manufacturer s ma yemplo yalternat e statistica l MI Lilluminatio 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 Executiv e 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 averag e betwee n thre e an d si x drivin g cycle s fo rMI Lillumination , th e manufacture rshal l provid e dat a and/o ra n engineerin g evaluatio n whic h adequatel ydemonstrat e tha t th e monitorin g syste 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 Lilluminatio n shal l not b e accepted
. (1.9 ) Regardin g diagnosti csvste m monitorin g condition s an d MI Lilluminatio n requirements , manufacturer s ar e generall yrequire d t o defin e appropriat e operatin g condition s fo rP. 5

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 fth e applicabl e Federa l Tes t Procedur e (FTP ) test
. Upo n detectio n ofa malfunction , th e MI Li 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 ofth e next drivin g cycl e durin g whic h monitorin g occur s provide d th e malfunctio n i s agai n detected
. Unti l th e 199 7 mode l year , diagnosti cstrategie s that illuminat e th e MI Lo n th e basi s o fcompletin g a tri p (tri o i s define d i n sectio n (n)(16.0 ) ofthes 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 csyste m shal l stor e a faul t cod e an d th e MI Lshal l b e illuminate d n o late rtha n th e en d o fth e next tri p i fth e malfunctio n i s agai n present
. (2.0 ) Manufacturer s ma yreques t Executiv e Office rapprova l t o disabl e a diagnosti csyste m designe d t o mee t th e requirement s ofsectio n (b ) a t ambien t engin e startin g temperature s belo wtwentydegree 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 adequatel 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 mayb e requeste d a t othe rambien t engin e startin g temperature s i fth e manufacture r adequatel 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 impac t ofsuc h ambien t temperature s o n th e performanc e of th e componen t itsel f(e.g.

. componen t freezing)

. (2.1 ) Manufacturer s ma ydisabl e monitorin g system s tha t ca n b e affecte d bvrunnin g ou t of fue l (e.g.

. misfire detection ) whe n th e fue l leve l i s low , provide d disablemen t wil l not occu rwhe n th e fue l leve l i s abov e 1 5 percen t ofth e nomina l capacityo fth e fue l tank
. (2.2 ) Fo rvehicle s designe d t o accommodat e th e installatio n o fPowe rTake-Off(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 ywhil e th e PTO 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 not 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 upo n PT O de-activation
. (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.e. , an ycatalyst(s ) whic h receiv e engine-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 next catalys t downstrea m i fi 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 alon o malfunctionin g (se e (b ) (1.2.1))

. Catalyst s arrange d i n paralle l wit h th e sam e inle t 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 catalys t incorporate d i n serie s int o th e sam e containe ra s a fron t catalys t shal l b e considere d a downstrea m catalyst
. Ih eP. 6

diagnosti csyste m shal l monito rth e catalvs t syste m fo rprope rperformance

. (1.1.2 ) I fth 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 next catalys t downstrea m o fth e smal l volum e catalys t eithe rindependentl yof , o r(i fth e condition s i n sectio n (1.1.1 ) ar e met ) i n combinatio n with , th e smal l volum e catalyst
. (1.1.3 ) Manufacturer s maysubmi t othe rmonitoring.strategies , subject t o Executiv e Office r approval , base d o n equa l timelines s an d reliabilityi n detectin g a catalys t malfunctio n a s thes e requirements
. (1.1.4 ) Mo n LEVs : Th e diagnosti csyste m shal l monito rth e catalys t syste m fo rprope r performance

. (1.1.2 ) Manufacturer s ar e not require d t o implemen t thes e catalys t monitorin g requirement s o n diese l vehicle s an d engines
. Further , manufacturer s o fspark ignite d lean-bur n vehicle s an d engine s ma yreques t tha t th e Executiv e Office r exemp t suc h application s fro m thes e catalys t monitorin g requirement s i fi t ca n b e

. demonstrate d tha t a reliabl e monitorin g technolog yi s no t available
. Th e Executiv e Office rshal l approv e suc h a reques t upo n determinin g tha t al l reasonabl e monitorin g technologie s hav e bee n considere d t o th e exten t possible
. (1.2 ) Malfunctio n Criteria : (1.2.1 ) LowEmissio n Vehicle s (se e sectio n (n)(14.0)) : Eac h monitore d catalyst , o r combinatio n o fcatalysts , shal l b e considere d malfunctionin g whe n averag e Federa l Tes t Procedur e (FTP ) tota l hydrocarbo n (HC ) conversio n efficienc yfail s betwee n 5 0 t o 6 0 percent
. 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 tota l H C emission s measure d a t th e outle t ofth e monitore d catalyst(s ) i s more tha n 4 0 t o 5 0 percen t ofth e cumulativ e tota l engine-ou t emission s measure d at th e inle t o fth e catalyst(s)

. I n addition , i fa fron t catalys t i s monitore d i n combinatio n wit h a downstrea m catalyst , th e fron t catalys t shal l b e considere d malfunctionin g whe n it s efficiencyha s deteriorate d betwee n 4 0 t o 5 0 percen t fro m it s 400 0 mil e averag e FT P tota l H C efficiency : Th e catalys t syste m shal l b e considere d malfunctionin g whe n it s conversio n capabilitydecrease s t o th e poin t tha t eithe ro fth 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 averag e Federa l Tes t Procedur e (FTP ) Non-Methan e Hydrocarbo n (NMHC ) conversio n efficiencyo fth e monitore d portio n o fth e catalys t syste 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 at th e outle t

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 byth e certificatio n reactivityadjustmen t facto rfo r th e vehicle
.P. 7

o fth e monitore d cataiyst(s ) are mor e tha n 5 0 percen t ofth e cumulativ e engine-ou t emission s measure d a t th e inle t ofth e catalyst(s)

. (1.2.2 ) TLE V application s shal l emplo ya n emissio n threshol d malfunctio n criterio n of2. 0 time s th e applicabl e FT P H C standar d plu s th e emission s fro m a tes t ru n wit h a representativ e 400 0 mil e catalys t syste m (12 5 hour s ofoperatio n fo rmedium-dut y vehicle s wit h engine 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 standard 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 year , manufacturer s shal l phas e i n a n emissio n threshol d of1. 5 time s th e applicabl e FT P H C standar d fo ral l categorie s o flo wemissio n vehicles , whic h shal l no t includ e th e emissio n leve l wit h a 400 0 mil e catalys t svstem
. 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 ) shai l equa l o rexcee d 3 0 percen t i n th e 199 8 mode l year . 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 fth 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 rcatalys t syste m modification s woul d b e necessar yfo rthi s threshol d t o b e met
. (1.2.2 ) Fo rLEVs , eac h smal ! volum e catalys t (i.e. , thos e designe d wit h a conversio n efficiencyto o lov

/ to b e practicall ymonitore d fo r5 0 t o 6 0 percen t averag e FT P tota l H C efficiency ) rr.cnitore d independentl yshal l b e considere d malfunctionin g whe n it s averag e FT P conversio n efficiencyha s deteriorate d bybetwee n 4 0 t o 5 0 percen 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 its conversio n capabilitydecrease s t o th e poin t tha t H C emissions increas e b

ymore 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 engine 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 may monito 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 ofth e monitore d catalyst(s ) i s more tha n 2 0 t o 4 0 percen t o fth e cumulativ e tota l engine-ou t emission s measure d at th e inle t o fth e catalyst(s)

. Alternatively , i fcorrelatio n wit h FT P emission s ca n b e demonstrated , manufacturer s mayus e th e malfunctio n criteri a specifie d i n (b)(1.2.1 ) o r(b)(1.2.3)

. 199 4 an d 199 5 mode l yea rvehicles,certifie d t o thi s optio n shal l incorporat e FT PP. 8

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 utilize-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 leas t onc e pe rtri p excep t fo rvehicle s utilizin g stead ystat e monitoring , whic h shal l compl ywit h sectio n (1.3.2)

. "Trip " i s 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 , subject t o th e limitatio n tha t th e monitorin g condition s shal l b e encountere d at least onc e durin g th e firs t engin e start portio n o fth e applicabl e FT P test
. However , vehicle s utilizin g stead ystat e monitorin g (a s permitte d by 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 syste m shal l operat e at leas t onc e pe r drivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met
. (1.3.2 ) I fstead ystat e efficiencyi 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 byth e manufacture rt o b e representativ e ofmedium-dutyvehicl 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 ofth 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 tha t 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 a t th e earlies t suc h conditio n encountere d afte rth e beginnin g o f closed-loo p operatio n fo reac h drivin g cycle
. Performanc e ofth e chec k ma yb e delaye d afte rengin e startu p unti l stabilize d coolan t temperatur e i s achieve d and/o r a suitabl e cumulativ e tim e interva l o fnon-close d throttl e vehicl e operatio n ha s elapse d t o ensur e th e catalys t i s warmed-u p fo rproperl yperformin g th e monitorin g •check
. Th e specifie d cumulativ e 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 temperatur e d rafte r engin e startin g an d shal l no t excee d 18 0 seconds
. Thes e monitorin g constraint s an d condition s mayb e altered , subject t o Executiv e Office rApproval
. Suc h approva l shal l b e grante d i fth 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 tha t th e requeste d alteratio n woul d yiel d improve d catalys t monitoring
. "Reasonabl y steady " spee d interva l i n thi s instanc e mean s a 2 0 secon d perio d wher e al l acceleration s an d deceleration s are o fa n averag e magnitud e equivalen t t o 0. 5 mph/secon d o rles s ove ran ytw o secon d interva l durin g thi s period
. Th e manufacture rma yabor t th e chec k

i fth e engin e operatin g condition s chang e durin g th e chec k

s o that 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 dP. 9

loa d condition s equivalen t t o th e abov e monitorin g conditions
. I fa manufacture r develop s a mean s ofmonitorin g catalys t efficiencywhic 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 accuracyan 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 LIlluminatio n an d Faul t Cod e Storage : (1.4.1 ) Excep t a s note d below , upo n detectio n ofa catalys t malfunction , th e diagnosti c syste m shal l stor e a faul t cod e an d th e MI Lshal l b e illuminate d n o late rtha n th e en d ofth e next tri p i fth e malfunctio n i s agai n present , upo n detectio n ofa catalys t malfunction , th e MI Lshal 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 cycl e durin g whic h monitorin g occurs provide d th e malfunctio n i s agai n present
. (1.4.2 ) Fo rstead ystat e catalys t efficiencychecks , upo n detectio n o fcatalys t efficiency belo w6 0 percent , th e diagnosti csyste m ma yperfor m u p t o tw o successiv e monitorin g check s prio rt o informin g th e vehicl e operato rofa malfunction

. Thes e monitorin g check s nee d not occu ro n th e sam e drivin g cycle , bu t shal l b e performe d a s soo n as prope rmonitorin g condition s occur . I fcatalys t efficiency 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 Lshal 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 affect th e prope revaluatio n ofcatalys t efficiency

. (1.4.4 ) Th e monitorin g metho d fo rth e catalyst(s ) shal l b e capabl e ofdetectin 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 not 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 monito ral l heate d catalys t system s fo rprope rheating
. (2.1.2 ) I n additio n t o th e non-heate d catalys t requirement s i n sectio n (b ) (1) , th e H C conversio n efficiencyofal l heate 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 e demonstrate d tha t a malfunctio n wil l b e indicate d whe n th e heate d catalys t i s malfunctioning

. Otherwise , th e heate d catalys t shal l b e monitore d independently
. I fa heate d catalys t i s a smal l volum e fron t catalyst , th e diagnosti c syste m shal l als o monito rth e next catalys t downstrea m eithe rindependentl yof , o r (i fth e condition s abov e are met ) i n combinatio n with , th e smal l volum e heate d catalyst
. Th e efficiencyofheate d catalyst s shal l b e monitore d i n conjunctio n wit h

# F P.1 0

. th e requirement s ofsectio n (b)(1)

. (2.2 ) Malfunctio n Criteria : (2.2.1 ) Pre-Start Heate d Catalys t Systems : Th e syste m shal l b e considere d malfunctionin g whe n th e designate d pre star t catalys t temperatur e i s no t attaine d

. befor e engin e starting
. (2.2.2-1 ) After-Start Heate d Catalys t System s Th e catalys t heatin g syste m shal l b e

considere d malfunctionin g whe n th e catalys t doe s no t 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 i s t o b e determine d byth e manufacture rsubject t o th e requiremen t tha t th e syste m shal l detect a heatin g syste m malfunctio n causin g emissions 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 y ofth e applicabl e FT P standards
. (2.2.32 ) Manufacturer s usin g othe rheatin g o rmonitorin g strategie s maysubmi t a n

alternat e pla n fo rapprova l byth e Executiv e 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 ) Excep t a s 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 rsectio n (b ) (1.2.2) , whicheve r i s applicable , whe n monitorin g th e conversio n efficiencyofa heate d catalyst
. (2.3 ) Monitorin g Conditions : (2.3.1 ) Manufacturer s shal l defin e appropriat e operatin g condition s fo rmonitorin g ofth e catalys t heatin g system ; subject 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 syste m shal l operat e at 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
. Pre-Start Heate d Catalys t Systems : Th e diagnosti csyste m shal l monito rth e heatin g syste m fo rprope roperatio n onc e pe rtrip
. Manufacturer s ma ydisabl e th e monitorin g syste m fo ron e engin e star t i fdurin 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 ofFT P driving
. (2.3.2 ) After-Start Heate d Catalys t Systems : Th e diagnosti csyste m shal l monito rth e heatin g syste m fo rprope roperatio n onc o pe rtrip
. Manufacturer s ma ydisabl e th e monitorin g syste m fo ron e engin e star t i fdurin 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 ofFT 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 efficiencyofal l heate d catalyst s a t leas t onc e pe rtrip
. (2.4 ) MI LIlluminatio n an d Faul t Cod e Storage :P.1 1

(2.4.1 ) Upo n detectio n o fa catalys t heatin g malfunction , th e diagnosti csyste m shal l stor e a faul t cod e an d th e MI Lshal l b e illuminate d n o late rtha n th e en d o fth e next tri p i fth e malfunctio n i s agai n presen t th e MI Lshal l illuminat e an d a faul t cod e store d n o late rtha n th e en d ofth 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 Lshal 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

. Manufacturers ma yreques t Executiv e Office r approva l t o stor e a genera l misfir e faul t cod e instea d ofa cylinde rspecifi ccod e unde r certai n operatin g 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 cylinde rcanno t b e reliabl yidentifie d whe n suc h condition s occur . I fmore tha n on e cylinde ri s misfiring , a separat e cod e shal l indicat e tha t multipl e cylinders are misfirin g (specifyin g th e individua l misfirin g cylinder s unde rthi s conditio n i s optional , however , identifyin g onl y on e misfirin g cylinde rshal l not 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 ofmisfire s ou t o fth e tota l numbe roffirin g event s necessar yfo 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
. Subject t o Executiv e Office rapproval , a longe rinterva l (u p t o 100 0 revolutions ) ma yb e employe d provide d th e manufacture rsubmit s dat a and/o ra n engineerin g evaluatio n whic h adequatel ydemonstrat e tha t catalys t damag e woul d not occu rdu e t o unacceptabl yhig h catalys 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 product 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 affect th e previousl ydetermine d malfunctio n criteria ; (B ) Th e percen t misfir e evaluate d i n 100 0 revolutio n increment s whic h woul d caus e emission s fro m a durabilitydemonstratio n vehicl e t o excee d 1. 5 time s an yo fth e applicabl e FT P standard s i fth e degre e ofmisfir e wer e presen t fro m th e beginnin g ofth e test
. I fth e leve l o fmisfir e determine d unde rthi s requiremen t i s significantl y lowe rfo ra n LE V as oppose d t o a No n LE V wit h a simila rengin e design , th eP.1 2

manufacture rmayreques t approva l fro m th e Executiv e Office rt o us e a highe r percentag e o fmisfir e as th e malfunctio n criteri a fo rth e LEV , not t o excee d th e leve l ofth e Non-LEV. - Fo rth e purpos e ofestablishin g th e percen t misfire , th e manufacture rshal l conduc t th e demonstratio n test(s ) wit h th e misfir e event s occurrin g a t equall yspace d complet e engin e cycl e intervals , acros s randoml y selecte d cylinder s throughou t eac h 100 0 revolutio n increment
. However , th e percen t misfir e establishe d shal l b e applicabl e fo ran ymisfir e conditio n (e.g

. random , continuous , equall yspaced , etc. ) fo rth e purpos e o fidentifyin g a malfunction

. Thi s criterio n shall mayb e use d fo ral l vehicle s wit h engine s containin g th e sam e numbe ro fcylinder s as th e demonstratio n vehicle
. Th e numbe ro fmisfire s i n 100 0 revolutio n increment s whic h wa s determine d fo rth e durabilit ydemonstratio n vehicl e malfunctio n criterio n mayb 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 fcylinders
. Th e malfunctio n criteri a fo ra manufacturer' s product 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 ar e necessarytha n previousl yestablishe d t o remai n withi n th e abov e emissio n limit ; (C ) Th e degre e o fmisfir e evaluate d i n 100 0 revolutio n increment s whic h woul d caus e a durabilit ydemonstratio 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 ofcylinder s a s th e demonstratio n vehicle
. Th e numbe rofmisfire s i n 100 0 revolutio n increment s v/hic h wa s determine d fo rth e durabilitydemonstratio n vehicl e malfunctio n criterio n mayb 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 rnumbers o fcylinders
. Th e malfunctio n criteri a fo ra manufacturer' s product lin e shal l b e update d whe n a new durabilit ydemonstratio n vehicl e i s teste d whic h indicate s more stringen t criteri a are necessarytha n previousl yestablishe d t o ensur e passin g a n Inspectio n an d Maintenanc e test , o rwhe n th e Inspectio n an d Maintenanc e tes t i s revised
. (3.3 ) Monitorin g Conditions : Fo r199 7 an d late rmode l yea rvehicles , misfir e shal l b e monitore d continuousl yan d unde ral l positiv e torqu e engin e speed s an d conditions
. (3.3.1 ) Fo rpre-199 7 mode 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 ofengin e spee d an d loa d conditio n combination s encountere d durin g a n FT P test ; nonetheless , subject t o Executiv e Office rapproval , manufacturer s mayemployhighe rmisfir e percentag e malfunctio n criteri a disabl e misfir e monitorin g unde rspecifi ccondition s withi n th e rang e ofoperatin g condition s encountere d durin g a n FT P tes t i fth e manufacture rprovide s dat a and/o ra n engineerin g evaluatio n whic h eaf l adequatel ydemonstrat e tha t th e detectio n o flowe rlevel s ofmisfir e monitorin g i s no t woul d not b e reliabl e feasible fo rth e vehicl e mode l i n questio n whe n suc h condition s are encountere d withou t makin g fundamenta l engin e o rcontro l uni t desig n modifications

. I fth e manufacture rca n s o demonstrat e tha t eve n th e detectio n ofa highe rmisfire percentage s i s no t feasibl e unde rspecifi cFT P operatin g conditions , th e manufacture rmayreques t Executiv e Office rapprova l t o disabl e th e monitorin g svste m whe n suc h condition s are encountered
. Further , wit h Executiv e Office r 1 0approval , th e manufacture rmaydisabl e misfir e monitorin g whe n misfir e canno t b e distinguishe d fro m other - effeots-whe n usin g the-boot-availabl e monitorin g technology
. Th e manufacture rshal l presen t dat a an d a n engineering-evaluatio n t o th e Executiv e Office rto justifyth 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 year . 7 5 percen t i n th e 199 8 mode l year . 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 not b e require d t o mee t th e phase-i n percentages : however
. 10 0 percen t implementatio n ofthes e monitorin g condition s shal l b e require 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 as 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 torqu e engin e speed s an d loa d conditions
. Vehicle s not meetin g th e monitorin g condition s ofthi 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 maydisabl e misfir e monitorin g i n th e engin e operatin g regio n boun d byth e positiv e torqu e lin e (i.e.

. engin e loa d wit h th e transmissio n i n neutral) , an d th e tw o followin g engin e operatin g points : a n engin e spee d of300 0 rp m wit h th e engin e loa d a t th e positiv e torqu e 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 at fou rinche s of mercur ylowe rtha n that a

t th e positiv e torqu e line
. Belo wi s a diagra m ofth e permitte d misfir e detectio n disablemen t regio n wit h respect t o th e requirement s of thi s section
. Further , wit h Executiv e Office rapproval , th e manufacture rmay 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 fth e bes t availabl e monitorin g technologie s as applie d t o othe rengines
.

1 1P. M

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. idl e 2C0

0 300 0 400 0 500 0 Redlin e

Engin e Spee d (3.4 ) MI LIlluminatio n an d Faul t Cod e Storage : (3.4.1 ) Excep t a s provide d below , upo n detectio n ofth e leve l ofmisfir e specifie d i n subsectio n (3.2 ) (A) , th e MI Lshal l blin k onc e pe rsecon d durin g actua l misfir e condition s an d remai n continuousl yilluminate d otherwise
. I n vehicle s whic h provid e fue l shutof fan d defaul t fue l contro l t o preven t overfuelin g durin g misfir e conditions , th e MI Lnee d no t blin k an d ma yinstea d illuminat e continuousl yupo n detectio n o fmisfire provide d tha t th e fue l shutoffan d defaul t contro l shal l b e activate d a s soo n as misfir e i s detected
. Fue l shutoffan d defaul t fue l contro l ma y b e deactivate d onl yt o permi t fuelin g outsid e ofth e misfir e range . (3.4.2 ) Upo n detectio n o fth e misfir e level s specifie d i n subsectio n (3.2 ) (B ) o r(C) , th e MI Lshal l 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 nex t drivin g cycl e i fmisfir e i s agai n detected
. I fmisfir e i s not detecte d durin g th e secon d drivin g cycle , th e MI Lshal 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 cycl e i n whic h misfir e i s detected , unles s drivin g condition s simila rt o thos e unde rwhic h misfir e wa s originall ydetecte d hav e bee n encountere d (se e sectio n (3.4.3) ) withou t a n indicatio n o fmisfire , i n whic h cas e th e initia l temporar ycod e an d store d condition s ma yb 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 ofa malfunction , th e initia l temporarycod e an d store d condition s mayb e erased
. (3.4.3 ) Upo n detectio n o fmisfire , manufacturer s shal l stor e 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 misfir e 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 are encountere d withi n 37 5 rpm , loa d 

### 1 2P.1 5

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 rstrategie s fo rdeterminin g i fsimila 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 simila rconditions
. (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 csyste m o n a diese l engin e shal l b e capabl e ofdetectin g th e lac k ofcombustio n i n on e o rmor e cylinders
. Th e diagnosti csyste m shal l als o identifyth e specifi ccylinde rfo rwhic h combustio n canno t b e detected
. I fth e lac k ofcombustio n i s presen t i n mor e tha n on e cylinder , a separat e cod e shal l indicat e that multipl e cylinder s ar e malfunctionin g (specifyin g th e individua l malfunctionin g cylinders unde rthi s conditio n i s optional : however , identifyin g on e malfunctionin g cvlinde rshal l not 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 star t 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 cycl e durin g whic h th e manufacturer-define d monitorin g condition s ar e met
. (3.5.4 ) MI LIlluminatio n an d Faul t Cod e Storage : Th e MI Lshal 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 ofth e next 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 ) EVAPORATIV E 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 rth e los s o fH C vapo rint o th e atmospher e b yperformin g a pressur e o rvacuu m chec k o fth e complet e evaporativ e 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 mayreques 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 ca n b e dat a and/o ra n engineerin g evaluatio n ar e provide d whic h adequatel ydemonstrate d that a reliabl e chec k canno t b e mad e whe n thes e condition s exist
.
1 3(4.1.4 ) Subject 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 o fth e strateg yan d supportin g dat a showin g equivalen t monitorin g reliabilityan d timelines s i n detectin g a n evaporativ e syste m malfunctio n o rleak
. (4.1.5 ) Implementatio n o fthi s requiremen t i s mandator yonl yfo r199 6 an d late rmode l yea rvehicle s designe d t o compl ywit h th e requirement s ofTitl e 13 , Californi a Cod e o fRegulations , 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 bya 0.04 0 inc h diamete rorific e i n an yportio n o fth 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 4^ 8 200 0 mode l year , manufacturer s shal l phase-i n diagnosti c strategie s t o detec t syste m leaks greate rtha n o requa l i n magnitud e t o a lea k cause d bya 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 equa l o rexcee d 5 0 percen t fo rth e 200 0 mode l year . 7 5 percen t fo rth e 200 1 mode l year , an d 10 0 percen t implementatio n fo rth e 200 2 mode l year . Smal l volum e manufacturer s shal l no t b e subjec t to th e phase-i n requirements : however
. 10 0 percen t implementatio n shal l be require d fo r200 2 mode l year . (4.2.3 ) O n vehicle s wit h fue l tan k capacit ygreate rtha n 2 5 gallons , th e Executiv e Office r shal l revis e th e siz e o

fth e orific e i fth e mos t reliabl e monitorin g metho d availabl e canno t reliabl ydetect a syste m lea k ofthi s lt_e
. magnitude s indicate d above
. (4.3 ) Monitorin g Conditions : Th e monitorin g syste m shal l monito rth e evaporativ e syste m at 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 fth e applicabl e FT P test
. Th e monitorin g syste m shal l operat e at leas t onc e pe rdrivin g cvcl e durin g whic h th e manufacturer-define d monitorin g condition s are met
. However , monitorin g condition s ma yb e furthe rlimite d wit h respect t o detectin g leaks equivalen t t o a 0.02 0 inc h diamete rorifice , subjec t t o Executiv e Office rapproval , o n th e basi s tha t th e monitorin g condition s wil l b e reasonably-occurrin g in-use
. an d provide d that a chec k fo rleak s 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 at leas t onc e pe rdrivin g cycl e a s indicate d above
. Subject t o Executiv e Office rapproval , i f performanc e o fth 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 mayperfor m evaporativ e syste m monitorin g durin g a steady-spee d condition , a s define d i n sectio n (b)

. (1.3.2) , betwee n 2 0 an d 5 0 mph
. 

### 1 4(4.4 ) MI LIlluminatio n an d Faul t Cod e Storage :

(4.4.1 ) Upo n detectio n o fa n evaporativ e syste m malfunctio n o ra malfunctio n tha t prevent s completio n o

fa n evaporativ e syste m check , th e MI Lshal 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 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 Lshal l illuminat e n o late rtha n th e en d ofth e next tri p i fth e malfunctio n i s agai n detected
. (4.4.2 ) I fth e diagnosti csyste m i s capabl e ofdiscernin g tha t a syste m lea k i s bein g cause d bya missin g o rimproperl ysecure d fue l cap , th e manufacture rma ynotify th e vehicl e operato rthroug h th e us e ofa n indicato rligh t othe rtha n th e MIL
. Th e manufacture ri s no t require d t o store 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 ma yeras 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 securely-fastened

. 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 rdeliverysyste m shal l hav e th e diagnosti csyste m monito rth e prope rfunctionin g of(i ) th e secondaryai 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 secondar yai rdeliver

ysyste m malfunctio n whe n th e flo wrat e fall s belo wth e manufacturer' s specifie d lowflo 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 adequatel ydemonstratin g tha t deterioratio n ofth 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 fth e system
. A s par t o fthi s demonstration , manufacturer s shal l demonstrat e tha t th e material s use d fo rth e secondaryai rsyste m (e.g.

. ai rhoses , an d tubing ) ar e inherentl yresistan t t o corrosio n o rothe rdeterioration , l n such- a case , I fa functiona l chec k i s approved , th e diagnosti csyste m shal l indicate a malfunctio n whe n som e degre e o fsecondar yairflo 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 secondary-ai 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 ofth e secondar yai rsystem , 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 start portio n o fth e applicabl e FT P test
. Th e monitorin g syste m shal l operat e at leas t onc e pe rdrivin g cycl e durin g whic h th e manufacturer-define d monitorin g condition s are met
. 

### 1 5(5.4 ) MI LIlluminatio 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 Lshal l illuminat e n o late rtha n th e en d o fth e nex t tri p i fth e malfunctio n i s agai n detecte d nex t drivin g cycl e durin g whic h monitorin g occurs provide d th e malfunctio n i s again " 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 reactive , 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 ofoperation
. Aprovisio n fo rensurin g tha t a lea k ha s bee n correcte d befor e extinguishin g th e MI Lshal l b e provided
. (6.1.2 ) Manufacturer s o fa mode l vehicl e whic h wil l phas e ou t th e us e o f chlorofluorocarbon s i n it s ai rconditionin g system s byth 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 not 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 e 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 start portio n ofth 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 cycl e durin g whic h th e manufacturer-define d monitorin g condition s ar e me t (6.4 ) MI LIlluminatio 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 Lshal l illuminat e n o late rtha n th e en d o fth e nex t tri p i fth e malfunctio n i s agai n presen t drivin g cycl 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 not clea ra faul t cod e an d th e MI Lshal l no t tur n offunles s th e lea k ha s bee n corrected
. (7.0 ) FUE LSYSTE M MONITORIN G (7.1 ) Requirement : Th e diagnosti csyste m shal l monito rth e fue l deliver ysyste m fo rit s ability t 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 ofal l electroni cfue l syste m component s t o th e exten t feasibl e wit h respect t o th e malfunctio n criteri a specifie d i n sectio n (7.2 ) below
. (7.2 ) Malfunctio n Criteria : Th e manufacture rshal l establis h malfunctio n criteri a t o monito rth e 

### 1 6P.1 9

fue l deliverysyste m suc h that a vehicle' s emission s woul d no t excee d 1. 5 time s an yo f th e applicabl e FT P 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 as on e o fth e malfunctio n criteri a th e conditio n wher e the'tri m circuitr yha s use d u p al l ofth e tri m adjustmen t allowe d withi n th e manufacturer' s selecte d limit(s)

. Manufacturer s maycompensat e th e criteri a limit(s ) appropriatel yfo rchange s i n altitud e o rfo rtemporaryintroductio n oflarg e amount s of 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 ofa malfunction

. (7.4 ) MI LIlluminatio 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 fth e malfunctio n criteri a limi t an d tim e interva l ar e exceeded , th e MI Lshal l b e illuminate d an d a faul t cod e store d n o late rtha n th e en d ofth 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 rwhic 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 fsimila r drivin g condition s are not encountere d durin g 8 0 drivin g cycle s trip s subsequen t t o th e initia l detectio n ofa malfunction , th e initia l temporarycod 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 Lshal l b e illuminate d an d a faul t cod e store d n o late rtha n th e en d ofth e next tri p drivin g cycl e i fth e malfunctio n i s agai n detected
. I fth e malfunctio n i s no t detecte d durin g th e secon d drivin g cycle , th e MI Lshal 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 cycl e i n whic h th e malfunctio n i s agai n detected , unles s drivin g condition s simila rt 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 ma yb 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 temporarycod e an d store d condition s ma

yb e erased
. (7.4.3 ) Upo n detectio n o fa 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 fth 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 rstrategie s fo rdeterminin g i fsimilarcondition 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 simila rconditions
. 1 7(8.0 ) OXYGE N SENSO 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 affect emissions , ofal l primar y(fue l control ) oxyge n (lambda ) sensor s fo rmalfunction

. I t shal l als o monito ral l secondaryoxyge 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 rt o switc h fro m lean-to-ric h onc e i t i s expose d t o a riche rtha n stoichiometri cexhaus t ga s o rvic e vers a (measurin g oxyge n senso rswitchin g frequencyma yno t b e a n adequat e indicato rofoxyge n senso rrespons e rate , particularl yat lo wspeeds)

. (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 checks shal l evaluat e th e portion s o fth e sensor' s dynami csigna l tha t ar e mos t affecte d bysenso rmalfunction s suc h a s agin g o rpoisoning
. Manufacturer s mayobserv e th e voltag e envelop e ofth e senso rwhe n cycle d a t a frequenc yo f1. 5 Hert z o rgreater , a s determine d byth e manufacturer , t o evaluat e a slo wrespons e rat e senso r(i.e

. a slo wsenso rcanno t achiev e maximu m and/o r minimu m voltag e as v/il 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 Executiv e Office rapproval , manufacturer s mayus e othe rvoltag e requirements/fuel-ai rswitchin g frequencie s o rmonitorin g strategie s base d o n a determinatio n ofaccurat e an d timel y evaluatio n o fth 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 Executiv e Office rfo rapprova l base d o n showin g equivalen t evaluatio n ofth 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 foxyge n sensor s i s no t required)

. Othe rheate rcircui t monitorin g strategie s woul d requir e approva l b yth 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 yofth e applicabl e FT P standards , o r whe n th e criteri a o fsensor s fo rus e a s a diagnosti csyste m monitorin g devic e (e.g. , fo rcatalys t efficiencymonitoring ) are exceeded
. (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 

### 1 8P.2 1

require d t o b e me t b

yth e componen t vendo rfo rheate rcircui t performanc e at hig h mileage)

. Subjec t t o Executiv e Office rapproval , othe rmonitorin g strateg y malfunctio n criteri a fo rdetectio n ofheate 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 adequatel 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 ofth 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 ofth e senso rca n onl yb e judge d acceptabl e byon e o rmor e of th e followin g means : withi n an y2 0 secon d reasonabl ystead yspee d conditio n as define d i n (b ) (1.3.2) , withi n an ydeceleratio n of3 second s o rmore , o rdurin g th e firs t idl e perio d o fat 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) ; not withstanding , unacceptabl e performanc e ca n b e determine d at an ytime
. Othe rmonitorin g condition s ma yb 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 reliabilityan d timelines s i n detectin g a malfunctionin g senso r compare d t o th e abov e monitorin g condition s an d th e Executiv e Office rapproves . (8.3.2 ) Fo rsecondar yoxyge 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 operatin g 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 syste m shal l operat e at leas t onc e pe rdrivin g cycl e durin g whic h th e manufacturer-define d monitorin g condition s are me t pef4r4p

. (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 ofth e applicabl e FT P test
. Th e monitorin g syste m shal l operat e at leas t onc e pe rdrivin g cycl e durin g whic h th e manufacturer-define d monitorin g condition s ar e me t pef-tr4p

. (8.4 ) MI LIlluminatio n an d Faul t Cod e Storage : Upo n detectio n o fan yoxyge n senso r malfunction , th e diagnosti csyste m shal l stor e a faul t cod e an d th e MI Lshal l illuminat e n o late rtha n th e en d o fth e nex t tri p i fth e malfunctio n i s agai n presen t drivin g cycl e durin g whic h monitorin g occurs provide d th e malfunctio n i s agai n present
. (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 1 9manufacture rshal l defin e appropriat e operatin g condition s fo rth e diagnosti c syste m shal l provid e 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 syste 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 , pe rtri p an d a n Th e diagnosti csyste 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 Lilluminatio n an d faul t cod e storag e shal l b e a s i n (8.4)

. (8.5.2 ) I fa manufacture rutilize s othe rtype s ofoxyge 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 (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 lowan 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 adequatel y demonstrate d 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 fth e applicabl e FT P emissio n standards
. (9.3 ) Monitorin g Conditions : Th e diagnosti csyste m Manufacturer s shal l defin e appropriat e operatin g condition s fo rmonitorin g th e EG R system , subjec t 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 start portio n o fth e applicabl e FT P tes t monito rth e EG R syste m at leas t onc e pe rtrip
. Th e monitorin g syste 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
. (9.4 ) MI LIlluminatio 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 Lshal l illuminat e 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 tr-ip-i fth e malfunctio n i s agai n present
. (10.0 ) COMPREHENSIV E COMPONEN TMONITORIN G (10.1 ) Requirement : Th e diagnosti csyste 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 2 0which : (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 as par

t o fth e diagnosti cstrateg yfo ran yothe rmonitore d syste m o rcomponent
. (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 affect emission s no 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
. (B)(A ) Th e monitorin g syste m shal l hav e th e capabilityo fdetecting , a t a minimum , lac k

of circui t continuit yan d ou t o frang e value s t o ensur e prope roperatio n o fth e inpu t device
. Th e determinatio n o fou t o frang e value s shal l includ e logi cevaluatio n of availabl e informatio n to determin e i fa 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 not b e reasonabl e at a hig h engin e spee d wit h a hig h mas s airflo wsenso rreading).(e.g.

. indicatin g a malfunctio n i n th e cas e ofhig h fue l tan k pressur e whe n th e coolan t temperatur e i s lov/ ; a n acceleromete routpu t indicatin g continuou s roug h roa d conditions , etc.)

. (G)(B ) Inpu t component s ma yinclude , bu t ar e not 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))

. (Q)(C ) 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 fstartin g engin e coolan t temperatur e and/o ra functio n o fintak 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 fthi 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 adequatel ydemonstrate ^ 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 routpu t component s fo rprope rfunctiona l respons e t o compute rcommands , fo rprope rfunctiona l respons e t o eac h compute rcommand , an ypowertrai n output component/syste m receivin g command s fro m th e compute r eithe rdirectl yo rindirectl ywhic h ca n affect emission s an d whic h i s no t otherwis e monitore d a s a component/syste m i n th e abov e monitorin g requirements
. (B ) Component s fo rwhic h functiona l monitorin g i s no t feasibl e shal l b e monitored , at a minimum , fo rprope rcircui t continuit yan d ou t ofrang e values , i fapplicable
. (C ) Outpu t component s ma yinclude , bu t ar e not limite d to , th e automati cidl e spee d

2 1 

# Lmotor , emission-relate d electroni conl ytransmissio n controls , heate d fue l preparatio n systems , th e wait-to-start lam p o n diese l applications , an d a warmu p catalys t bypas s valv e (se e section_(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

o fcircui t continuit yo r manufacturer-specifie d out-of-rang e value s occur . Additionally , th e coolan t temperatur e senso rshal l b e considere d malfunctionin g i fi t doe s no t achiev e a stabilize d minimu m temperatur e necessaryfo rclose d loo p operatio n withi n a manufacturer-specifie d tim e interva l afte rstartin g th o 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 eas b compute rcommand s doe s no t occur . Shoul d a functiona l chec k fo rmalfunctio n not b e feasible , the n a n output component/syste m shal l b e considere d malfunctionin g when , a t a minimum , lac k

o fcircui t continuit yo rmanufacturer-specifie d out-of-rang e value s occur . (10.3 ) Monitorin g Conditions : Components/system s i n thi s subsectio n shal l b e monitore d continuously
. (10.3.1 ) Inpu t Components : Inou t component s shal l b e monitore d continuousl yfo rprope r

rang e o fvalue s an d circui t continuity
. Fo rrationalit ymonitorin g (wher e applicable) , manufacturer s 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 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 start portio n o fth e applicabl e FT P test
. Rationalit ymonitorin g shal l occu rat 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
. (10.3.2 ) Outpu t Components : Monitorin g fo rcircui t continuit yan d prope rrang e o fvalue s

(i fapplicable ) shal l b e conducte d continuously
. Fo rfunctiona l monitoring , manufacturer s 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 at leas t 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 yb e conducte d durin g non-FT P drivin g conditions , subject t o Executiv e Office rapproval , i fth e manufacture r provide s dat a and/o ra n engineerin g evaluatio n whic h adequatel ydemonstrat e tha t th e componen t doe s no t normall yfunction , o rmonitorin g i s 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 cycl e durin g whic h th e manufacturer-define d monitorin g condition s are met
. (10.4 ) MI LIlluminatio n an d Faul t Cod e Storage : • (10.4.1 ) Upo n detectin g a malfunction , th e diagnosti csyste m shal l stor e a faul t cod e afi d 2 2th e MI Lshal l illuminat e 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 tri p i fth e malfunctio n i s agai n detected
. (10.4.2 ) I n conjunction " wit h storin g a faul t code , manufacturer s shal l illuminat e th e MI Lfo r

malfunction s o fcomponents/system s fo rwhic h eithe ro fth e followin g occurs : 1 ) Whe n malfunctioning , th e componen t o rsyste m Coul d caus e vehicl e emissions t o increas e b y1 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 ofth 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 v/hethe ra powertrai n inpu t o routpu t componen t not otherwis e covere d ca n affect emissions
. I fth e Executiv e Office rreasonabl ybelieve s tha t a manufacture rha s incorrectl ydetermine 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 not hav e a n emissio n effect

. Emissio n dat a mayb e requeste d fo ran yreasonabl e drivin g condition
. (c) ADDITIONA LMI LILLUMINATIO N AN D FAULTCOD E STORAG E PROTOCO L (1.0 ) MI LILLUMINATIO N Fo ral l emission-relate d components/systems , upo n fina l determinatio n o fmalfunction , th e MI Lshal l remai n continuousl yilluminate d (excep t tha t i t shal l blin k

as indicate d previousl yfo rmisfir e detection)

. I fan ymalfunction s ar e identifie d i n additio n t o misfire , th e misfire conditio n shal l tak e precedence , an d th e MI Lshal l blin k accordingly
. Th e diagnosti csyste m shal l stor e a faul t cod e fo rMI Lilluminatio n wheneve rth e MI Li s illuminated
. Th e diagnosti csyste m shal l illuminat e th e MI Lan d shal l stor e a cod e wheneve rth e engin e contro l powertrai n enters a defaul t o r"lim p home " mod e o foperation
. Th e diagnosti csyste m shal l illuminat e th e MI Lan d shal l stor e a cod e wheneve rth e engin e contro l syste m fail s t o 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 fth 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 simila rt 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 syste m responsibl e fo rilluminatin g th e MI Lfunction s withou t detectin g th e malfunctio n trip s i n whic h th e malfunctio n ha s no t recurre d an d j fn o othe rmalfunctio n ha s bee n identifie d tha t woul d independentl yilluminat e th e MI Laccordin g t o th e requirement s outline d above
. (3.0 ) ERASIN G AFAUL TCOD E Th e diagnosti csyste m mayeras 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 Li s no t illuminate d fo rtha t faul t code
. 2 3(d ) TAMPERIN G PROTECTIO N Computer-code d engin e operatin g parameter s shal l not 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 are no t limite d to , curren t availabilit yofperformanc e chips , hig h performanc e capabilit yo fth 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 mayinclud e copyrightabl e executabl e routine s o rothe rmethods
. Beginnin g wit h th e 199 9 mode l year , 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 protect feature s requirin g electroni cacces s t o a n off-sit e compute rmaintaine d byth e manufacturer

. Equivalen t method s shal l als o b e considere d bvth e Executiv e Officer

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

. EEPROM ) shal l includ e prove n write-protec 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 fa ful l diagnosti cchec k (i.e. , th e minimu m numbe rofcheck s necessaryfo r MI Lillumination ) o fal l monitore d component s an d system s (excep t as note d below ) ha s no t bee n complete d sinc e th e compute rmemor ywa s las t cleare d (e.g.

. throug h th e us e o fa sca n too l o rbatterydisconnect). , th e manufacture rshal l stor e a cod e indicatin g th e nee d fo radditiona l mixe d cit yan 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 byreferenc 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 fmisfire an d fue l syste m fault s shal l b e considere d complet e fo rpurpose s of determinin g th e readines s indicatio n i fmalfunction s ar e no t detecte d i n thes e area s b y th e tim e al l othe rdiagnosti csyste m check s are complete
. I fmonitorin g i s temporaril y disable d unde rcondition s whic h maylea 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 revaporativ 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 fth 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 csyste m shal l als o includ e a cod e o racknowledg e messag e indicatin g tha t th e diagnosti csyste m itsel fi s functionin g properly
. (f ) STORE D ENGIN E CONDITION S Upo n detectio n o fth e firs t malfunctio n o fan y componen t o rsystem , "freez e frame " engin e condition s presen t at 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 byth 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 favailable) , fue l pressur e (i favailable) , vehicl e spee d (i favailable) , coolan t temperature , intak e manifol d pressur e (i favailable) , 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 fcondition s facilitatin g effectiv e repair s fo rfreez e fram e storage
. Onl y on e fram e o fdat a i s required
. Manufacturer s ma ya t thei rdiscretio n choos e t o stor e

_2 4additiona l frame s provide d that a t leas t th e require d fram e ca n b e rea d bya generi c sca 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 199 2 June
. 1994
. an d "E/ E Diagnosti cTes t Modes " ( J 1979) , Decembe r199 1 June
. 1994
. whic h are incorporate d byreferenc 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 ) DURABILITYDEMONSTRATIO N VEHICL E 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 not bee n use d previousl yfo rpurpose s ofthi s section
. I fa manufacture rdoe s no t hav e a certificatio n durabilityvehicl e availabl e whic h i s suitabl e fo rth e engin e famil y designate d fo rtesting
. T-th e Executiv e Office rshal l permi t a manufacture rt o satisf ythi s requiremen t wit h waiv e thi s requiremen t i fa manufacture rdoe s not hav e a certificatio n durabilit yvehicl e 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 r prio rt o runnin g a Californi a durabilityvehicl 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 rapplyin g fo rcertificatio n o fth e engin e familie s planne d fo ra particula rmode l yea ri n orde rt o allo wselectio n o fth 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 y vehicl e o rengin e a t th e en d ofth e require d mileag e o roperating-hou raccumulation
. Fo r non-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 NOxstandard shal l b e use d fo r demonstratio 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 percen t gasoline , an d gasolin e only
. Fo rvehicle s capabl e ofoperatin g o n othe r fue l combinations , th e manufacture rshal l submi t a pla n fo rperformin g demonstratio n testin g fo rapprova l b yth e Executiv e Office ro n th e basi s o fprovidin g accurat e an d timel yevaluatio n o fth 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 at thei rmalfunctio n criteri a limit s a s determine d b yth e manufacturer : (2.1 ) Oxyge n Sensors

. Th e manufacture rshal l conduct th e followin g demonstratio n tests : Th e firs t tes t involve s testin g al l primaryan d secondar y(i fequipped ) oxyge n sensor s 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 (secondaryoxyge n sensors fo rwhic h 2 5respons 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 secondary(i fequipped ) oxyge n sensor s 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 yothe roxyge n senso rparamete rtha t ca n caus e vehicl e emission s t o excee d 1. 5 time s th e applicabl e standard s (e.g. , shift 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 primaryan d secondary(i fequipped ) 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 rprimaryan d secondaryoxyge n senso rparameter s shal l b e wit h norma l characteristics
. Th e Executiv e Office rma yapprov e othe rdemonstratio n protocol s i fth e manufacture rca n adequatel ysho wcomparabl e assuranc e tha t 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 conduct onl yon e flo wrat e demonstratio n tes t a t th e lo wflo 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 rshal l conduc t on e demonstratio n tes t at th e borde ro fth e ric h limi t an d on e demonstratio n tes t a

t th e borde rofth e lea n limi t establishe d byth e manufacture r fo remissio n compliance
. (2.3.2 ) Fo rothe rsystems , th e manufacture rshal l conduct a demonstratio n tes t at th e criteri a limit(s)

. (2.3.3 ) Fo rpurpose s ofth e demonstration , th e fauft(s ) induce d ma yresul t i n a unifor m distributio n o ffue l an d ai ramon g th e cylinders
. Non-unifor m distributio n o ffue l an d ai ruse d t o induc e a faul t shal l no t caus e a n indicatio n o fmisfire

. 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 airflo wmeter , etc.)

. Compute rmodification s t o caus e th e fue l syste m t o operat e at th e adaptiv e limi t fo rmalfunctio n shal l not b e allowe d fo rth e demonstratio n tests
. (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 fpassin 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 not 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 at th e lo wflo wlimit , unles s onl ya functiona l chec k i s permitte d accordin g t o sectio n fb)(5.2.2)

. (2.6 ) Catalys t Efficiency : (2.6.1 ) Non-Lo wEmissio n Vehicles : Th e manufacture rshal l conduct a baselin e FT P tes t . 2 6wit 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 t o it s malfunctio n limit
. I f a manufacture ri s employin g a stead ystat e catalys t efficiencychec k i n accordanc e w'it 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
. I ftw 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 catalys t system s tha t us e a n afte rstart heatin g strategy , t Th e manufacture rshal l conduct a demonstratio n tes t wher e th 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 ) PRECONDITIONIN G Th e manufacture rshal l us e th e firs t engin e star t portio n o fon e applicabl e FT P cycl e fo rpreconditionin g befor e eac h o fth e abov e emissio n tests
. I fa manufacture roafr-provide s dat a and/o ra n engineerin g evaluatio n whic h adequatel y demonstrat e tha t additiona l preconditionin g i s necessar yt 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 r a 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 ) hot soa k afte rth e initia l preconditionin g cycle
. Th e manufacture rshal l not requir 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 syste m demonstratio n t o b e successful

. (4.0 ) EVALUATIO N PROTOCO L (4.1 ) Wit h th e exceptio n o fshort-ter m tri m onl yvehicles , tTh e manufacture rshal l se t th e syste m o rcomponen t 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 fan d throughou t th e prio rt o conductin g th e applicabl e preconditionin g cycle(s ) an d FT P test
. (Fo rmisfir e demonstration , misfir e shal l b e se t a t it s criteri a limi t a s specifie d pursuan t t o sectio n (b)(3.2)(B))

. I fa secon d preconditionin g cycl 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 syste m o rcomponen t befor e conductin g th e secon d preconditionin g cycle : however , th e demonstrate d syste m o rcomponen t shal l no t b e replaced , modifie d o radjuste d afte rpreconditionin g ha s take n place
. (4.2 ) Fo rshort-ter m tri m onl yvehicles , th e fue l syste m shal l operat e at th e criteri a limi t fro m th e beginnin g ofclosed-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 b e operate d ove rth e firs t 27 "engin e star t portio n o fth e applicabl e FT P tes t t o allo wfo rth e initia l detectio n o fth e malfunction

. Thi s drivin g cycl e mavb e omitte d fro m th e evaluatio n protoco l i fi t i s unnecessary . I frequire d b vth e demonstrate d monitorin g strategy , a col d soa k mayb e performe d prio rt o conductin g thi s drivin g cvcle
. (4.3 ) Fo rmisfir e demonstration , misfir e shal l b e se t a t it s criteri a limi t as specifie d pursuan t to 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 Lshal l b e illuminate d befor e th e hot start portio n o fth e ful l FT P tes t i n accordanc e wit h requirement s ofsubsectio n (b) : (4.4.1 ) I fth e MI Ldoe s no t illuminat e whe n th e system s o rcomponent s 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 no t acceptable
. (4.4.2 ) Excep t fo rcatalys t efficiencydemonstration , i fth e MI Lilluminate s an d emission s d o no t excee d 1. 5 time s an yo fth e applicabl e FT P emissio n standards , n o furthe r demonstratio n shal l b e required
. (4.4.3 ) Excep t fo rcatalys t efficiencydemonstration , i fth e MI Lilluminate 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 shai 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 emissions are reduce d byn o more tha n 3 0 percent
. Limi t valu e at a minimu m includes , i n th e cas e ofoxyge n sensors , respons e rat e an d voltage ; fo r EG R systems , EG R flo wrate ; fo rsecondar yai rsystems , ai rflo wrate ; fo r short-ter m fue l trim - onl ysystems , tim e interva l at th e fue l syste m rang e of authorit ylimit ; fo rlong-ter m fue l tri m systems , shift i n th e bas e fue l calibration ; fo r heate 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 temperatur e (i fa n after-start heatin g strateg yi s used) ; an d fo r misfire , percen t misfire

. Fo rth 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 teste d wit h th e fault ycomponents
. Th e MI Lshal l no t illuminat e durin g thi s demonstration
. (4.4.4 ) Fo rNon-LE V catalys t efficiencydemonstration , i fH C emission s d o no t increas e bymor e 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 Li s illuminated , n o furthe rdemonstratio n shal l b e required
. However , i fH C emission s increas e bymor e 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 Li s illuminated , th e vehicl e shal l b e reteste d wit h th e averag e FT P H C conversio n capabilityo fth e catalys t syste m increase d byn 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 rth 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 Lshal 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 not 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 Li 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 Li s illuminated , th e vehicl e shal l b e reteste d wit h averag e FT P H C conversio n capabilit yofth e catalys t svste m 2 8P.3 1

increase d b yn o mor e tha n 5 percen t (i.e.

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

. Fo rth e OB D l l 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 Lshal l not illuminat e durin g thi s demonstration , 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 Li s illuminated , n o furthe r demonstratio n i s required
. I fcatalys t efficiencyfall s outsid e ofth e malfunctio n criteri a range , th e catalyst' s efficiencyshal l b e adjusted , o rth e catalys 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 Li s no t illuminated , th e catalys t mayb e deteriorate d furthe rbu t no t belo wth e lowe r limi t ofth e malfunctio n criteri a range , an d th e syste m retested
. I fth e catalyst' s efficiencyi s belo wth e lowe rlimi t ofth e malfunctio n criteri a rang e an d th e MI Li s not illuminated , th e OB D syste m i s not acceptable
. (4.5 ) I fa n OB D syste m i s determine d unacceptabl e byth 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 OOV 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 ofcertification

. Wit h Executiv e Office r approval , on e o rmor e o fth e documentatio n requirement s specifie d i n thi s sectio n mav b e waive d o raltere d i fth e informatio n require d woul d b e redundan t o runnecessaril y burdensom e t o generate : (1 ) Awritte n descriptio n ofth e functiona l operatio n ofth e diagnosti csyste m t o b e include d i n Sectio n 8 ofmanufacturers ' certificatio n applications
. (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 ) ofth 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 ofoutpu t signa l iv
. faul t criteri a limit s use d t o evaluat e outpu t signa l o fprimar yparamete 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 fcheck 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 

## checks (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 yofAutomotiv e Engineers ' (SAE ) J193 0 "Electrical/Electroni c System s Diagnosti cTerms , Definitions , Abbreviations , an d Acronyms" , September , 4-994 - June
. 1993 , shal l b e used
. J193 0 i s incorporate d byreferenc 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 w 2 9 ~chart , provide d al l ofth e informatio n require d i n (2 ) i s included
.

(4 ) Alistin g an d bloc k diagra m ofth 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 fth e MI Lan d th e fue l ca p indicato rlight , i fpresent , 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 ofmisfir e 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 rLowEmissio 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 efficiencylevel , o ra 4 0 t o 5 0 percen t deterioratio n leve l t o indicat e a malfunctio n whe n catalys 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 indicate 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 fa stead ystat e catalys t efficiencychec k i s employe d i n accordance wit h sectio n (b)(1.2.4) , dat a supportin g th e criteri a use d byth e diagnosti csyste m fo r establishin g a 6 0 t o 8 0 percen t catalys t efficiencyleve l shal l b e provide d instead
. (11 ) Dat a supportin g th e criteri a use d t o detect evaporative purg e syste m leaks
. (12 ) Adescriptio n o fth e modifie d o rdeteriorate d component s use d fo rth e faul t simulatio n t o driv e th e fue l syste m t o th e criteri a limit(s ) fo rdemonstratin g fue l syste m complianc e wit h th e requirement s o fwit h respect t o th e demonstratio n test s specifie d i n subsectio n (g)

. (13 ) Alistin g o fal 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 necessaryt o demonstrat e complianc e wit h th e requirement s o fthi s section
. (i ) IN-US E RECAL LTESTIN G PROTOCO LTh e manufacture rshal l adher e t o th e followin g procedure s fo rvehicle s subject t o in-us e recal l testin g require d b yth e ARB : (1 ) I fth e MI Lilluminate 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
. 3 0(2 ) Th e tes t mayb e rerun , an d th e result s fro m th e repaire d vehicl e ma yb e use d fo r emissio n reportin g purposes . (3 ) I fa 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 Lillumination , th e par t 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 par t ha s bee n tampere d wit h o rabuse d i n suc h a wa ytha t th e diagnosti csyste m canno t reasonabl yb e expecte d t o detect th e resultin g malfunction.

. i (4 ) Failur e ofa vehicle , o rvehicle s o n average , t o mee t applicabl e emissio n standard s | wit h n o illuminatio n o fth e MI Lshal l not b yitsel fb e ground s fo rrequirin g th e OB D i syste m t o b e recalle d fo rrecalibratio n o rrepai rsinc e th e OB D syste m canno t predict I 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 ofemission s abov e applicabl e standards , presenc e ofj identifiabl e fault yo rdeteriorate d component s whic h affect emission s wit h n o MI L illumination , an d systemati cerroneou s activatio n ofthe.MIL

. Wit h respec t t o erroneou s i activatio n o fth e MIL , th e manufacture rma yreques t Executiv e Office rapprova l t o tak e ! actio n aoart fro m a forma l recal l (e.g. , extende d warrant yo ra servic e campaign ) t o j correc t th e performanc e o fth e diagnosti cstrateg yo n in-us e vehicles
. I n considerin g a ; manufacturer' s request , th e Executiv e Office rshal l conside rth e estimate d frequenc yo fj fals e MI Lactivatio n in-use
. an d th e expecte d effectivenes s i n relatio n t o a forma l recal l ofth e manufacturer' s propose d correctiv e actio n i n capturin g vehicle s i n th e field

. Fo r! 199 4 an d 199 5 mode l years-ssly , on-boar d diagnosti csyste m recal l shal l no t b e considere d fo rexcessiv e emission s withou t MI Lilluminatio n (i frequired ) an d faul t cod e storag e unti l emission s excee d 2. 0 time s an yofth 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 yo fth e applicabl e standards
. Thi s highe remissio n threshol d 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 rcatalys t monitoring , fo rwhic h th e threshol d shal l exten d t o th e 200 0 mode l year) , an d t o th e 200 0 mode l vea rfo ral l applicabl e monitorin g requirement s o n LE V an d ULE V applications
. (6 ) Regardin g catalys t syste m monitoring , unmonitore d catalyst s shal l b e normall yaged
. G ) CONFIRMATOR YTESTIN G Th e AR B mayperfor m confirmatorytestin g o fmanufacturers ' diagnosti csystem s fo rcomplianc e wit h requirement s o fthi 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 rit s designe e ma yinstal l appropriatel ydeteriorate d o rmalfunctionin g ' component s i n a n otherwis e properl yfunctionin g tes t vehicl e o fa n engin e famil y represente d byth 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 , misfir e detectio n system , oxyge n sensor , secondar yai rsystem , catalys t efficiencymonitorin g system , heate d catalys t system , an d EG R syste m malfunctio n criteri a fo rcomplianc e wit h th e ' applicabl e emissio n constraint s i n thi s section
. Confirmatorytestin g t o verif ytha t malfunctio n criteri a ar e se t fo rcomplianc e wit h emissio n requirement s o fthi 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 o fa representativ e sampl e ofvehicle s whic h uniforml yfai l t o mee t th e i requirement s ofthi s sectio n ma yb e recalle d fo rcorrection
.

3 1(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 ) as 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 based'o n th e industr yspecification s reference d i n thi s regulation
. (1.0 ) Eithe rSA E Recommende d Practic e J1850 , "Clas s B Dat a Communicatio n Networ k Interface" , August
. 199 1 Mav
. 1994
. o rIS O 9141_ 2 GARB , "Roa d vehicle s - Diagnosti c System s - CAR B Requirement s fo rInterchang e o fDigita l Information, " February
. 1994
. whic h are incorporate d b yreference , shal l b e use d as th e on-boar d t o off-boar d 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 cRedundanc 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 ofth e messag e conten t (includin g tes t mode s an d tes t messages ) a s wel l a s standardizatio n o fth e downloadin g protoco l fo rfaul t codes , paramete rvalue s an d thei runits , an d freez e fram e dat a ar e se t fort h i n SA E Recommende d Practice s o n "OB D I I Sca n Tool " (J1978) , March
. 199 2 June
. 1994
. an d "E/ E Diagnosti cTes t Modes " (J1979) , Docembor
. 199 1 Jun e 1994
. whic h hav e bee n incorporate d b yreference

. Faul t codes , paramete rvalues , an d freez e fram e dat a shal l b e capabl e o fbein 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 automotiv e repai rindustryvehicl e repai rprocedure s whic h allo weffectiv e emissio n relate d diagnosi s an d repairs t o b e performe d usin g onl yth e J197 8 generi csca n too l an 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 of manufacture rspecifi co renhance d equipment
. (2.2 ) Th e J197 8 sca n too l shal l b e capabl e o fnotifyin g th e use rwhe n on e o rmor e ofth e require d monitorin g system s ar e no t include d a s part o fth e OB D system
. (3.0 ) J201 2 Par

t 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 byreference

. (4.0 ) J196 2 Astandar d dat a lin k connecto ri n a standar d 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 bya technicia n enterin g th e vehicl e fro m th e driver' s side
. An ypin s i n th e standard connecto rtha t provid e an yelectrica l powe rshal l b e properl yfuse d t o protect th e integrityan 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-dutyvehicle s mayalternativel yemplo yth e communicatio n protocol s establishe d i n Draft SA E Recommende d Practic e J1939
. "Seria l Contro l an d Communication s Network" , Apri l 1994
. t o satisfyth e standardizatio n

, requirement s specifie d i n section s (k)(1 ) throug h (k)(4 ) above
. Th e Executiv e Officer' s 3 2decisio n shal l b e base d o n th e effectivenes s ofth e SA E J193 9 protoco l i n satisfyin g th e diagnosti cinformatio n requirement s ofSectio n 1968. 1 i n compariso n wit h th e abov e reference d documents
. (I ) SIGNA LACCES 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 fequippe d wit h close d loo p fue l control) , fue l tri m (i fequipped) , fue l pressur e (i favailable) , ignitio n timin g advanc e (i f equipped) , intak e ai rtemperatur e (i fequipped) , manifol d ai rpressur e (i fequipped) , ai r flo wrat e fro m mas s ai rflo wmete r(i fequipped) , engin e RPM , throttl e positio n senso r outpu t valu e (i fequipped) , secondaryai rstatu s (upstream , downstream , o r atmosphere ; i fequipped) , an d vehicl e spee d (i fequipped)

. Th e signal s shal l b e provide d i n standar d unit s base d o n th e SA E specification s incorporate d byreferenc e i n thi s regulation , an d actua l signal s shal l b e clearl yidentifie 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 ) a t idle , an d at 250 0 RP M (n o load , i n neutra l o rpark)

. I f250 0 RP M i s outsid e ofth e operatin g rang e o fth e engine , th e correspondin g dat a ma vb e omitted
. I fth e tota l fue l comman d tri m i s mad e u p by mor 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 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 requirement
. (3.0 ) Oxyge n senso rdat a tha t wil l allo wdiagnosi s ofmalfunctionin g oxyge n sensor s shal l b e provide d throug h seria l dat a port o n th e standardize d dat a link
. I n addition , beginning , wit h th e 199 6 mode l yea r(wit h ful l complianc e require d byth e 199 7 mode l year) , fo r al l monitore d component s an d systems , excep t misfir e detection , fue l syste m

. monitoring , an d comprehensiv e componen t monitoring) , result s ofth e mos t recen t tes t performe d byth e vehicle , an d th e limit s t o whic h th e syste m i s compare d (excep t fo r continuousl ymonitore d systems/components ) shal l b e availabl e throug h th e seria l dat a port o n th e standardized-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 mos t 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 b yth e Executiv e Office rif , i n th e judgmen t o fth e Executiv e Officer , the yprovid e fo r equivalen t off-boar d evaluation
. (m ) IMPLEMENTATIO N SCHEDUL E (1.0 ) Thes e OB D I I requirements , excep t evaporativ e purg e syste m monitorin g (se e 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 . 3 3(2.0 ) Th e Executiv e Office rshal l gran t a n extensio n fo rcomplianc e wit h th e requirement s of thes e subsection s wit h respect t o a specifi cvehicl e mode l o rengin e famil yi fth e vehicl e mode l o rengin e famil ymeet s previousl yapplicabl e on-boar d diagnosti csyste m requirement s an d Amanufacture rdemonstrate s tha t i t canno t modifya presen t electroni ccontro l syste m b yth e 199 4 model-yea rbecaus e majo rdesig n syste m change s no t 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 o fthes e subsections
. (2.1 ) Th e manufacture rwhic h has receive d a n extensio n fro m th e Executiv e Office rshal l compl ywit h thes e regulation s whe n modificatio n ofth e electroni csyste m occur s 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 extension i s required
. (3.0 ) Smal l volum e manufacturer s as define d i n (n ) (13.0 ) shal l mee t 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 ofthes e regulation s prio rt o th e require d implementatio n dat e provide d tha t th e syste m complie s wit h previousl y applicabl e on-boar d diagnosti csyste m requirements
. (5.0 ) Vehicle s certifie d t o ru n c n alternat e fuels , an d dDiese l vehicles Tshal l mee t thes e requirement s byth e 199 6 mode l year . Manufacturer s mayreques 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 adequatel 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 requirement s byth e 199 6 mode l year . However , manufacturer s mayreques t th e Executiv e Office r t o waiv e specifi cmonitorin g requirement s fo rwhic h monitorin g ma yno t b e reliabl e wit h respec t t o th e us e o falternat e fuel s unti l th e 199 9 mode l yea r (5.2 ) Medium-dut yvehicle s wit h engine s certifie d o n a n engin e dynamomete rma ycompl y wit h thes e requirement s o n a n engin e mode l yea rcertificatio n basi s rathe rtha n o n a vehicl e mode l basis
. (6.0 ) Th e Executiv e Office rma ywaiv e on e o rmor e o fth e requirement s o fthes 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 ir i accordance 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 byevaluatin g an d considerin g th e bes t availabl e 3 4monitorin 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 are not 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 , maycertifyth 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 fth e requirement s o fthes 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 systems.shal l b e subject t o fine s pursuan t t o sectio n 4301 6 ofth 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 deficiencyan d every , deficiencythereafte ridentifie d i n a vehicl e model , th e fine s shal l b e i n th e amoun t o f$5 0 pe rdeficiencype rvehicl e fo rnon-complianc e wit h an yofth e monitorin g requirement s specifie d i n subsection s (b)(1 ) throug h (b)(9) , an d $2 5 pe r deficiencype 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 rofdeficiencies , deficiencie s o fsubsection s (b)(1 ) throug h (b)(9 ) shal l b e identifie d first

. Tota l fine s pe rvehicl e unde rthi s sectio n shal l not 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 rgrante 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 r shal l als o b e exemp t fro m thes e fines

. Fo r199 6 mode l yea rvehicle s an d engine s only , failur e t o properl ymonito rmultipl e electroni ctransmissio n component s shal l b e considere d a singl e monitorin g syste m deficiency

. (6.2 ) Beginnin g wit h th e 199 7 mode l yea 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 ) abov e shal l continu e t o appl ysubjec t 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 y identifie d deficiencies , wit h th e exceptio n tha t fine s shal l appl yt o al l monitorin g syste m deficiencie s wherei n a require d monitorin g strateg yi s completel yabsen t fro m th e OB D system , an d 2 ) Manufacturer s maynot carr yove rmonitorin g syste m deficiencie s t o futur e mode l year s unles s i t ca n b e demonstrate d tha t vehicl e hardwar e modification s woul d b e necessaryt o correct th e deficiency , i n whic h cas e th e deficiencyma yb e carrie d ove rfo ron e mode l vear . (n ) GLOSSAR YFo rpurpose s ofthi s section : (1.0 ) "Malfunction " mean s th e inabilityo fa 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 o f an yo fth e abov e component s o rsystem s t o a degre e tha t woul d likel ycaus e th e emission s o fa n averag e certificatio n durabilityvehicl e wit h th e deteriorate d component s o rsystem s presen t a t th e beginnin g o fth e applicabl e certificatio n emissio n tes t t o excee d b ymor e tha n 1. 5 time s an yo fth e emissio n standard s (bot h wit h respect 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 o f Titl e 13
. 3 5(2.0 ) "Secondaryair " refer s t o ai rintroduce d int o th e exhaus t syste m bymean s o fa pum p o raspirato rvalv e o rothe rmean s tha t i s intende d t o ai d i n th e oxidatio n o fH C an d C O containe d i n th e exhaus t ga s stream
. (3.0 ) "Engin e misfire " mean s lac k ofcombustio n i n th e cylinde rdu e t o absenc e o fspark , poo rfue l metering , poo rcompression , o ran yothe rcause . (4.0 ) Oxyge n senso r"respons e rate " refer s t o th e delay(measure d i n milliseconds ) betwee n a switc h o fth e senso rfro m lea n t o ric h o rvic e vers a i n respons e t o a chang e i n fuel/ai rrati o abov e an d belo wstoichiometric
. (5.0 ) A"trip " mean s vehicl e operatio n (followin g a n engine-offperiod ) o fduratio n an d drivin g mod e suc h tha t al l component s an d system s are monitore d at leas t onc e byth e diagnosti csyste m excep t catalys t efficiencyo revaporativ e syste m monitorin g whe n a steady-spee d chec k

i s used , subjec t t o th e limitatio n tha t th e manufacturer-define d tri p monitorin g condition s shal l al l b e encountere d a t leas t onc e durin g th e firs t engin e star t portio n ofth e applicabl e FT P cycle
. (6.0 ) A"warm-u p cycle " mean s sufficien t vehicl e operatio n suc h tha t th e coolan t temperatur e ha s rise n bya t leas t 4 0 degree s Fahrenhei t fro m engin e startin g an d reache s a minimu m temperatur e of16 0 degree s Fahrenheit
. (7.0 ) A"drivin g cycle " consist s o fengin e startup , vehicl e operatio n beyon d th e beginnin g of close d loo p operation , an d engin e shutoff

. (8.0 ) "Continuou s monitoring " mean s samplin g at a rat e n o les s tha n tw o sample s pe r second
. I ffo rengin e contro l purposes , a compute rinpu t componen t i s sample d les s frequently , th e valu e o fth e componen t ma yinstea 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 " refers 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 " refers t o a n indicatio n ofth e curren t airflo wdivide d b ypea k airflow , wher e pea k

airflo wi s corrected.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 3 6Pea 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 byth e rati o of curren t outpu t torqu e t o maximu m outpu t torqu 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 to 300 0 ne wlight-dutyvehicle s an d medium-dut yvehicle s pe rmode l yea r base d o n th e averag e numbe rofvehicle s sol d b yth e manufacture reac h mode l yea r fro 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 ) "LowEmissio n Vehicle " refers t o a vehicl e certifie d i n Californi a as a Transitiona l Lov / Emissio n Vehicl e (TLEV) , a Lo wEmissio n Vehicl e (LEV) , o ra n Ultra 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 purposes-o fthes e regulations , include s diese l derive d refer s t o 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 ofprope rrespons e t o a compute rcommand
. Fo ra n inpu t component , functiona l chec k mean s verificatio n of 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

. (17.0 ) "Federa l Tes t Procedure " (FTP ) cycl e o rtes t refers to , fo rpassenge rvehicles , light-dut ytrucks , an d medium-dut yvehicle s certifie d o n a chassi s dynamometer , th e drivin g schedul e i n Cod e ofFedera l Regulation s (CFR ) 40 , Appendi x1 , Part 86 , sectio n (a ) entitled , "EP AUrba n Dynamomete rDrivin g Schedul e fo rLight - Duty Vehicle s an d Light-Dut yTrucks. " Fo rmedium-dut yengine s certifie d o n a n engin e dynamometer , FT P cycl e o rtes t refer s t o th e engin e dynamomete rschedul e i n CF R 40 , Appendi x1 , Part 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 , "EP AEngin 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 foccurs . (19.0 ) "Powe rTake-Offunit " refers t o a n engin e drive n outpu t provisio n fo rth e purpose s o f powerin g auxiliaryequipmen t (e.g.

. a dump-truc k bed , aeria l bucket , o rtow-truc k winch)

. Note : Authorit ycited : Section s 39600 , 39601 , 4301 3 an d 43018 , Healt h an d Safet yCode

. Reference : Section s 39002 , 39003 , 43013 , 43100 , 43101 , 43102 , 43104 , 4310 5 an d 43204 , 3 7 •

### J v"

Healt h an d Safet

yCode

.

38P.4 1 

# ri '
Amen dTitl e 13 , Californi a Cod e o f Regulations , Section s 203 0 and2031 , t o rea da s follows : Articl e 5 . Approva l o f System s Designe dt o Conver t Moto r Vehicle s t o Us e Fuel s Othe r Tha nth e Origina l Certificatio nFue l 2030 . Liquefie dPetroleu m Ga s o r Natura l Ga s Retrofi t Systems . (a ) Applicabl e Standard s an dTes t Procedures . Th e standard s an dtes t procedure s fo r approva l o f system s designe dt o conver t 199 3 andearlie r mode l yea r moto r vehicle s t o us e liquefie d petroleu m

ga s o r natura l ga s fuel s ar e containe di n"Californi a Exhaus t Emissio nStandard s an dTes t Procedure s fo r System s Designe dt o Conver t Moto r Vehicle s Certifie dfo r 199 3 andEarlie r Mode l Year s t o Us e Liquefie d Petroleu m

Ga s o r Natura l Ga s Fuels " adopte db y th e Stat e Boar do nApri l 16 , 1975 , a s amende dMarc h11 , 1993 . Th e standard s andtes t procedure s fo r approva l o f system s designe dt o conver t 199 4 an dsubsequen t mode l yea r moto r vehicle s t o us e liquefie dpetroleu m ga s o r natura l ga s fuel s ar e containe din"Californi a Certificatio nan dInstallatio nProcedure s fo r Alternativ e Fue l Retrofi t System s fo r Moto r Vehicle s Certifie dfo r 199 4 an d Subsequen t Mode l Years, " adopte dby th e Stat e Boar dMarc h11 , 1993 , a s amende dApriD

L 26 , 1995A t th e optio no f th e retrofi t syste m manufacturer , th e standard s andtes t procedure s fo r approva l o f system s designe dt o conver t 199 4 .an

dsubsequen t mode l yea r vehicle s t o us e liquefie dpetroleu m ga s o r natura l ga s .fuel s ma y be use dfo r approva l o f system s designe dt o conver t 199 3 andearlie r mode l yea r moto r vehicle s t o us e liquefie d petroleu m

ga s o r natura l ga s fuel s i nlie uo f th e "Californi a Exhaus t Emissio nStandard s and.Tes t Procedure s fo r System s Designe dt o Conver t Moto r Vehicle s Certifie dfo r 199 3 andEarlie r Mode l Year s t o Us e Liquefie d Petroleu m

Ga s o r Natura l Ga s Fuels. " (b ) Implementatio nPhase-I nSchedule . Notwithstandin g subsectio n(a) , a retrofi t syste m manufacture r ma y appl y "Californi a Exhaus t Emissio nStandard s an dTes t Procedure s fo r System s Designe dt o Conver t Moto r Vehicle s Certifie dfo r 199 3 andEarlie r Mode l Year s t o Us e Liquefie dPetroleu m Ga s o r Natura l Ga s Fuels " t o certif y retrofi t system s fo r 199 4 an d199 5 model-yea r vehicle s i naccordanc e wit h th e followin g implementatio nphase-i nschedule . Eac hmanufacture r ma y certif y a maximu m

o f 8 5 percen t o f it s tota l 199 4 model-yea r engin e famil y • retrofi t system s an d4 5 percen t o f it s tota l 199 5 model-yea r system s accordin g t o th e requirement s o f thes e tes t procedure s and"Californi a Exhaus t Emissio nStandard s an dTes t Procedure s fo r System s Designe dt o Conver t Moto r Vehicle s Certifie dfo r 199 3 andEarlie r Mode l Year s t o Us e Alcoho l o r Alcohol/Gasolin e Fuels" , adopte db y th e Stat e Boar do nApri l 28 , 1983 , -as amende dMarc h11 , 1993 . Th e remainin g percentag e o f eac h manufacturer' s certifie d199 4 an d199 5 model-yea r engin e famil y retrofi t system s an dal l o f 199 6 andsubsequen t model-yea r engin e famil y retrofi t system s shal l b e certifie daccordin g t o ".Californi a Certificatio nan d Installatio nProcedure s fo r Alternativ e Fue l Retrofi t System s Fo r Moto r



# 2 ?" k.

Vehicle s Certifi e

shal 1 b e determi n shal 1 b e me t pri o Exhaus t Emissio n Conver t Moto r Ye h Liquefie d Petrol e certif ya a retr o vehicl e ("TLEV") , vehicl e ("ULEV" ) vehicl e t o TLEV , 1960.1 , Titl e 13 ,

d Fo r 199 4 an

d Subsequen t Mode l Years. " Th e percentage s e d fro mth e tota l numbe r o f retrofi t systems certifie d and r t o th e en d o f th e applicabl e calenda r year . "Californi a Standard s an

d Tes t Procedure s fo r System s Designe d t o icle s Certifie d fo r 199 3 and Earlie r Mode l Year s t o Us e umGa s o r Natura l Ga s Fuels " shal l no t b e applie d t o fi t syste mfo r installatio n o n a transitiona l low-emissio n low-emissio n vehicl e ("LEY") , o r ultra-low-emissio n o r t o certif ya retrofi t syste mdesigne d t o conver t a LEV , o r ULE V

emissio n standard s (a s define d i n Sectio n Californi a Cod e o f Regulations) . NOTE : Authorit ycited : Section s 39515 , 39600 , 3960 1 and 43006 , Healt hand Safet yCode ; Section s 2715 6 an d 38395 , Vehicl e Code . Reference : Section s 43000 , 43004 , 43006 , 43008.6 , 4301 3 an d 43018 , Healt han d Safet yCode ; Section s 27156 , 3839 1 an d 38395 , Vehicl e Code .
2031 . Alcoho l o r Alcohol/Gasolin e Fuel s Retrofi t Systems , (a ) Applicabl e Standard s and Tes t Procedures . Th e standard s a conver t 199 3 and e a alcohol/gaso l in e f u ar e containe d i n " C fo r System s Design e Earlie r Mode l Year s th e Stat e Boar d Ap r an d tes t procedure s subsequen t mode l y e fuel s ar e containe d Procedure s fo r Ait e Certifie d fo r 199 4 Marc h11 , 1993 . a s syste m manufacture r system s designe d t o t o us e alcoho l o r a system s designe d t o us e alcoho l o r alc o Emissio n Standard s Moto r Vehicle s Cer t Alcohol/Gasolin e F u nd tes t procedure s fo r approva l o f systems designe d t o r1ie r mode l yea r moto r vehicle s t o us e alcoho l o r el s i n lie u o f th e origina l certificatio n fue l syste m aliforni a Exhaus t Emissio n Standard s and Tes t Procedure s d t o Conver t Moto r Vehicle s Certifie d fo r 199 3 an d t o Us e Alcoho l o r Alcohol/Gasolin e Fuels, " adopte d by i l 28 , 1983 , a s amende d Marc h11- , 1993 . Th e standard s fo r approva l o f system s designe d t o conver t 199 4 an d a r moto r vehicle s t o us e alcoho l o r alcohol/gasolin e i n "Californi a Certificatio n an d Installatio n rnativ e Fue l Retrofi t System s fo r Moto r Vehicle s an d Subsequen t Mode l Years, " adopte d byth e Stat e Boar d amende d A P r i l 2 & > 199 5 . A t th e optio n o f th e retrofi t

. th e standard s an d tes t procedure s fo r approva l o f conver t 199 4 an d subsequen t mode l yea r moto r vehicle s Icohol/gasolin e fuel s ma yb e use d fo r approva l o f • conver t 199 3 an d earlie r mode l yea r moto r vehicle s t o hol/gasolin e fuel s i n lie u o f th e "Californi a Exhaus t an d Tes t Procedure s fo r System s Designe d t o Conver t ifie d fo r 199 3 an d Earlie r Mode l Year s t o Us e Alcoho l o r els. "

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