هيئة التقييس لدول مجلس التعاون لدول الخليج العربية 
GCC STANDARDIZATION ORGANIZATION (GSO)  
 
 
مشروع  مواصفة نهائي 
Final Draft of Standard FDS  
  
 
 
 
إعداد اللجنة الفرعية   الخليجية رقم TC02/SC01 
 
Prepared by GSO  Technical  Committee No.  TC02/SC01  
 
  
 
 GSO 02/01  / FDS  / ECE 141 :2017  
   
الأحكام الموحدة المتعلقة بالموافقة على المركبات فيما يتعلق بنظام مراقبة ضغط  
الهواء في الإطارات  (TPMS) 
 
Uniform provisions concerning the approval of vehicles with regard 
to their Tyre Pressure Monitoring Systems (TPMS)  
 
 
  
  
  
هذه الوثيقة مشروع للائحة فنية  خليجية تم توزيعها 
لإبداء الرأي والملاحظات بشأنها، لذلك فإنها عرضة 
للتغيير والتبديل ، ولا يجوز الرجوع إليها كلائحة فنية  
خليجية إلا بعد اعتمادها من الهيئة . 
 This document is  a draft Gulf Standard   
circulated for comments. It is, therefore, 
subject to alteration and modification and 
may not be referred to as a Gulf Standard  
until approved by GSO.  
 المواصفةالقياسية الخليجية  GSO  ECE 141:2017   
  
1 
  تقديم   
 
هيئة التقييس لدول  مجلس التعاون  لدول  الخليج العربية هيئة إقليمية تضم في عضويتها أجهزة التقيييس الونييية فيي 
الييدول  الأعضييا   وميي  مهييا  الهيئيية إعييداا ااواايي ا  القياسييية واللييوا ا ال يييية الخليجييية اواسيي ة لجييان فيييية 
متخصصة . 
قرر  مجلس الإاارة لهيئة  التقييس لدول مجلس التعاون لدول  الخليج  العربية في اجتماعه رقييييييييي م   ..………………… 
الذي عقد      اتاريخ     ......./......./....... هي  ااوافق ......./...../.......        اعتماا اللا حة ال يية    الخليجية رقم     
GSO  ECE 141: 2017   التي  تم  اراستها   وتبييها  ع   اللجية الاقتصااية الأوربية في الأمم ااتحدة ECE    رقم  
ECE 141: 2017        اون   إاخال   تعديلا    فيية   عليها   ضم    ارنامج   عمل   اللجية ال يية ال رعية   
الخليجية   رقم TC02/SC01   "اللجية ال يية ال رعية الخليجية اواا ا  ااركبا  والإنارا"  اادرجة في خ ة  
اولة ق ر  " . 
  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
3 Regulation No. 14 1 
  Uniform provisions concerning the approval of vehicles with 
regard to their Tyre Pressure Monitoring Systems (TPMS)  
Contents  
 Page  
 1. Scope  ................................ ................................ ................................ ................................ ................   4 
 2. Definitions  ................................ ................................ ................................ ................................ ........   4 
 3. Application for approval  ................................ ................................ ................................ ..................   5 
 4. Approval   ................................ ................................ ................................ ................................ ..........   5 
 5. Specifications and tests  ................................ ................................ ................................ ....................   6 
 6. Supplementary information  ................................ ................................ ................................ ..............   7 
 7. Modifications and extension of approval of the vehicle type  ................................ ...........................   8 
 8. Conformity of production  ................................ ................................ ................................ .................   8 
 9. Penalties for non -conformity of production  ................................ ................................ .....................   8 
 10. Production definit ively discontinued  ................................ ................................ ................................   9 
 11. Names and addresses of Technical Services responsible for conducting  
  approval tests, and of Type Approval Authorities  ................................ ................................ ............   9 
 Annexes  
 1 Communication  ................................ ................................ ................................ ................................   10 
 2 Arrangements of approval marks  ................................ ................................ ................................ .....  12 
 3 Test req uirements for Tyre Pressu re Monitoring Systems (TPMS)  ................................ .................   13 FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
4   1.  Scope  
1. This Regulation  applies to the approval of vehicles of category  M1 up to a 
maximum mass of 3,500 kg and N 11 when equipped with a tyre  pressure 
monitoring system, except for vehicles fitted with dual wheels on an axle.  
  2.  Definitions  
  For the purposes of this Regulation : 
2.1. "Approval of a vehicle " means the approval of a vehicle type with regard to 
its tyre pressure monitoring syst em. 
2.2. "Vehicle type " means vehicles which do not differ significantly in such 
essential aspects as:  
  (a) The manufacturer’s trade name or mark;  
 (b) Vehicle features which significantly influence the performances of the 
tyre pressure monitoring system ; 
  (c) The design of the tyre pressure monitoring system.  
2.3.  "Wheel " means a complete wheel consisting of a rim and a wheel disc;  
2.4. "Tyre" means a pneumatic tyre , being a reinforced flexible envelope that is 
provided with, or forms in conjunction with the wheel on which it is 
mounted, a continuous, essentially toroidal, closed chamber containing a gas 
(usually air) or a gas and liquid, that is intended normally to  be used at a 
pressure gre ater than atmospheric pressure;  
2.5. "Maximum mass " means the maximum value of the vehicle stated by the 
manufacturer to be technically permissible (this mass may be higher than the 
"permissible maximum mass" laid down by the nat ional administration);  
2.6. "Maximum axle load " means the maximum value, as indicated by the 
manufacturer, of the total vertical force between the contact surfaces of the 
tyres or tracks of one axle and the ground and resulting from the part of the 
vehicle  mass supported by that axle; this load may be higher than the 
"authorized axle load" laid down by the national administration. The sum of 
the axle loads may be greater than the value corresponding to the total mass 
of the vehicle ; 
2.7. "Tyre Pressure Moni toring System (TPMS) " means a system fitted on a 
vehicle, able to perform a function to evaluate the inflation pressure of the 
tyres or the variation of this inflation pressure over time and to transmit 
corresponding information to the user while the vehic le is running;  
2.8. "Cold tyre inflation pressure " means the tyre pressure at ambient 
temperature, in the absence of any pressure build -up due to tyre usage;  
2.9. "Recommended cold inflation pressure (P rec)" means the pressure 
recommended for each tyre pos ition by the vehicle manufacturer, for the 
  
 1 As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document 
ECE/TRANS/WP.29/78/Rev. 4, para. 2 - 
www.unece.org/trans/main/wp29/wp29wgs/wp29gen/wp29resolutions.html . FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
5 intended service conditions (e.g. speed and load) of the given vehicle, as 
defined on the vehicle placard and/or the vehicle owner's manual;  
2.10.  "In service operating pressure (P warm)" means the inflation pressu re for each 
tyre position elevated from the cold pressure (P rec) by temperature effects 
during vehicle usage;  
2.11.  "Test Pressure (P test)" means the actual pressure of the tyre(s) selected for 
each tyre position after deflation during the test procedure.  
  3.  Application for approval  
3.1. The application for approval of a vehicle type with regard to its tyre pressure 
monitoring system shall be submitted by the vehicle manufacturer or by his 
duly accredited representative;  
3.2. It shall be accompanied, i n triplicate, by a description of the vehicle type with 
regard to the items specified in Annex  1 to this Regulation : 
3.3. A vehicle representative of the vehicle type to be approved shall be submitted 
to the Type Approval Authority or the Technical Service responsible for 
conducting the approval tests.  
3.4. The Type Approval Authority shall verify the existence of satisfactory 
arrangements for ensuring effective control of the conformity of productio n 
before type approval is granted.  
  4.  Approval  
4.1. If the vehicle submitted for approval pursuant to this Regulation  meets all the 
requirements of paragraph  5. below, approval of that vehicle type shall be 
granted.  
4.2. An approval number shall be ass igned to each type approved. Its first two digits 
(at present 00 for the regulation in its original form ) shall indicate the series of 
amendments incorporating the most recent major technical amendments made 
to the regulation at the time of issue of the ap proval. The same Contracting 
Party may not assign the same number to anothe r type of vehicle.  
4.3. Notice of approval or of extension or of refusal of approval of a vehicle type 
pursuant to this Regulation  shall be communicated to the Contracting Parties 
to the Agreement which apply this Regulation  by means of a form 
conforming to the model in Annex  1 to this Regulation . 
4.4. There shall be affixed, conspicuously and in a readily accessible place 
specified on the approval form, to every vehicle conforming to a vehicle type 
approved under this Regulation  an international approval mark consisting of:  
4.4.1.  A circle surrounding t he letter "E" followed by the distinguishing number of 
the country which granted approval ;2 
  
 2 The distinguishing numbers of the Contracting Parties to the 1958 Agreement are reproduced in 
Annex 3 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), document 
ECE/TRANS/WP.29/78/Rev. 4, Annex 3 - 
www.unece.org/trans/main/wp29/wp29wgs/wp29gen/wp29resolutions.html.  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
6 4.4.2.  The number of this Regulation , followed by the letter "R", a dash and the 
approval number to the right of the markings prescribed in paragraph 4.4.1.  
4.5. If the vehicle conforms to a vehicle type approved, under one or more 
regulations annexed to the Agreement, in the country which granted approval 
under this Regulation , the symbol prescribed in paragraph  4.4.1. need not be 
repeated; in such a case, the regul ation and approval numbers and the 
additional symbols for all the regulations under which approval has been 
granted in the country which granted approval under this Regulation  shall be 
placed in vertical columns to the right of the symbol prescribed in par agraph 
4.4.1.  
4.6. The approval mark shall be clearly legible and be indelible.  
4.7. The approval mark shall be placed close to or on the vehicle data plate 
affixed by the manufacturer.  
4.8. Annex  2 to this Regulation  gives examples of approval marks.  
  5.  Specifications and tests  
5.1.  General  
5.1.1.  Any vehicle of categories M 1 up to 3,500  kg and N 1, in both cases with all 
axles equipped with single tyres, and fitted with a tyre pressure monitoring 
system complying with the definition of paragraph  2.7. shall meet the 
performance requirements contained in paragraphs  5.1.2. to 5.5.5. of this 
Regulation  over a wide range of road and environmental conditions 
encountered within the territory of the Contacting Parties . 
5.1.2.  The effectiveness of the tyre press ure monitoring system fitted on a vehicle  
shall not be adversely affected by magnetic or electrical fields. This shall be 
demonstrated by fulfilling the technical requirements and respecting the 
transitional provisions of Regulation No. 10 by applying:  
(a) The 03 series of amendments for vehicles without a coupling system 
for charging the R echargeable Electric Energy Storage System  
(traction batteries);  
(b) The 04 series of amendments for vehicles with a coupling system for 
charging the R echargeable Electri c Energy Storage System  (traction 
batteries)  
5.1.3.  The system shall operate from a speed of 40  km/h or below, up to the 
vehicle's maximum design speed.  
5.1.4.  The vehicle shall fulfil the tests (puncture, diffusion and malfunction) as 
specified in Annex 3 . 
5.2. Tyre pressure detection for incident -related pressure loss.  
5.2.1.  The TPMS shall illuminate the warning signal described in paragraph  5.5. 
within not more than  ten minutes of cumulative driving time after the in 
service operating pressure in one of the vehicle's tyres has been reduced by 
twenty per cent or it is at a minimum pressure of  150 kPa, whatever is higher.  
5.3. Detection for a tyre pressure level significantly below the recommended 
pressure f or optimum performance including fuel consumption and safety.  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
7 5.3.1.  The TPMS shall illuminate the warning signal described in paragraph  5.5. 
within not more than sixty minutes of cumulative driving time after the in -
service operating pressure in any of th e vehicle's tyres, up to a total of four 
tyres, has been reduced by twenty per cent  or it is at a minimum pressure of 
150 kPa, whatever is higher . 
5.4. Malfunction detection.  
5.4.1.  The TPMS shall illuminate the warning signal described in paragraph  5.5. n ot 
more than 10  minutes after the occurrence of a malfunction that affects the 
generation or transmission of control or response signals in the vehicle's tyre 
pressure monitoring system.  
5.5. Warning indication.  
5.5.1.  The warning indication shall be by me ans of an optical warning signal 
conforming to Regulation No.  121. 
5.5.2.  The warning signal shall be activated when the ignition (start) switch is in the 
"on" (run) position (bulb check). This requirement does not apply to tell -tales 
shown in a common spa ce. 
5.5.3.  The warning signal must be visible even by daylight; the satisfactory  
condition of the signal must be easily verifiable by the driver from the 
driver's seat.  
5.5.4.  The malfunction indication may be the same warning signal as the one used 
to ind icate under -inflation. If the warning signal described in paragraph  5.5.1. 
is used to indicate both under -inflation and a malfunction of the TPMS, the 
following shall apply: with the ignition (start) switch in the "on" (run) 
position the warning signal sha ll flash to indicate a malfunction. After a short 
period of time the warning signal shall remain continuously illuminated as 
long as the malfunction exists and the ignition (start) switch is in the "on" 
(run) position. The flashing and illumination sequenc e shall be repeated each 
time the ignition (start) switch is in the "on" (run) position until the 
malfunction has been corrected.  
5.5.5.  The tell -tale of the warning described in paragraph  5.5.1. may be used in a 
flashing mode in order to provide informati on about the reset status of the 
tyre pressure monitoring system in accordance with the  owner's manual of 
the vehicle.  
  6.  Supplementary information  
6.1. The owner’s manual, if any, of the vehicle shall contain at least the following 
information:  
6.1.1. A statement that the vehicle is equipped with such a system (and information 
how to reset the system, if the actual system includes such a feature).  
6.1.2. An image of the tell -tale symbol described in paragraph  5.5.1. (and an image 
of the malfunction tell -tale symbol, if a dedicated tell -tale is used for this 
function).  
6.1.3. Additional information about the significance of the low tyre pressure 
warning tell -tale illuminating and a description of the corrective action to be 
undertaken if this happens.  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
8 6.2. If no owner's manual is supplied with the vehicle, the information required in 
paragraph 6. 1. above shall be displayed in a prominent place on the vehicle.  
  7.  Modifications and extension of approval of the  
  vehicle type  
7.1. Every modification of the  vehicle type as defined in paragraph 2.2. of this 
Regulation  shall be notified to the Type Approval Authority which approved 
the vehicle type. The Type Approval Authority may then either:  
7.1.1.  Consider that the modifications made do not have an adverse effect on the 
conditions of the granting of the approval and grant an extension of approval;  
7.1.2.  Consider that the modifications made affect the conditions of the granting of 
the approval and require further tests or additional checks before granting an  
extension of approval.  
7.2. Confirmation or refusal of approval, specifying the alterations, shall be 
communicated by the procedure specified in paragraph  4.3. above to the 
Contracting Parties to the Agreement applying this Regulation . 
7.3. The Type Approval Authority  shall inform the other Contracting Parties of 
the extension by means of the communication form which appears in 
Annex  1 to this Regulation . It shall assign a serial number to each extension, 
to be known as the extension number.  
  8.  Conformity of production  
8.1. The conformity of production procedures shall comply with those set out in 
Appendix  2 of the Agreement (E/ECE/324 –E/ECE/TRANS/505/Rev.2), with 
the following requirements:  
8.2. The Type Approval Authority  which has granted type ap proval, may at any 
time verify the conformity of production in each production facility. The 
normal frequency of these verifications shall be at least once per year.  
  9.  Penalties for non -conformity of production  
9.1. The approval granted in respect of a  vehicle type pursuant to this Regulation  
may be withdrawn if the requirements laid down in paragraph  8 are not 
complied with.  
9.2. If a Contracting Party to the Agreement, which applies this Regulation , 
withdraws an approval it has previously granted, it shall forthwith so notify 
the other Contracting Parties applying this Regulation , by means of a copy of 
the approval form bearing at the end, in large letters, the signed and dated 
annotation "APPROVAL WITHDRAWN".  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
9   10.  Production definit ively discontinued  
 If the holder of the approval completely ceases to manufacture a type of 
vehicle approved in accordance with this Regulation , he shall so inform the 
authority which granted the approval. Upon receiving the relevant 
communication that authori ty shall inform thereof the other Contracting 
Parties to the Agreement applying this Regulation  by means of a copy of the 
approval form bearing at the end, in large letters, the signed and dated 
annotation "PRODUCTION DISCONTINUED".  
  11.  Names and addres ses of Technical Services  
  responsible for conducting approval tests, and of 
  Type Approval Authorities  
 The Contracting Parties to the Agreement which apply this Regulation  shall 
communicate to the United Nations Secretariat the names and addresses of  
the Technical Services responsible for conducting approval tests and of the 
Type Approval Authorities which grant approval and to which forms 
certifying approval or extension or refusal or withdrawal of approval, issued 
in other countries, are to be sent.  
  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
Annex 1  
10 Annex 1  
  Communication  
(maximum format:  A4 (210 x 297 mm))  
  
 
concerning:2  Approval  
   Approval extended  
   Approval refused  
   Approval withdrawn  
   Production definit ively discontinued  
of a vehicle type with regard to its tyre pressure monitoring system pursuant to Regulation 
No. 141. 
Approval No.:  ....................       Extension No.:  .................  
1. Trade name or mark of the v ehicle:  
 ................................ ................................ ................................ ................................ ......  
2 Vehicle type (if applicable, variants that are included):   
3. Manufacturer's name and address:  ................................ ................................ ................   
4. If applicable, name and address of the manufacturer's representative:  
  ................................ ................................ ................................ ................   
5. Vehicle submitted for approval on:  ................................ ................................ ...............   
6. Technical Service responsible for conducting approval tests:  ................................ ......  
7. Date of test report:  ................................ ................................ ................................ ........   
8. Number of test report:  ................................ ................................ ................................ ...  
9. Brief description of the vehicle type:  ................................ ................................ ............   
  
 1 Distinguishing number of the country which  has granted/extended/refused/withdrawn approval 
(see approval provisions in the regulation).  
 2 Strike out what does not apply.  
issued by :  Name of administration:  
......................................  
......................................  
......................................  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
Annex 1  
 
11 9.1. Mass of the vehicle when tested:  
 Front axle:  ................................ ................................ ................................ .....................   
 Rear axle:  ................................ ................................ ................................ ......................   
 Total:  ................................ ................................ ................................ .............................   
9.2. Marking and wheel size(s) of standar d unit equipment:  ................................ ...............   
9.3. Brief description of the tyre pressure monitoring system  ................................ .............   
10. Result of the tests:  
 Measured  
Time to warning  
(mm:ss)  
"Puncture test"   
"Diffusion test"   
"Malfunction test"   
 
11. Position of approval mark:  ................................ ................................ ............................   
12. Reason(s) of extension (if applicable): ................................ ................................ .........   
13. Approval granted/refused/extended/withdrawn2 ................................ ...........................   
14. Place:  ................................ ................................ ................................ ............................   
15. Date:  ................................ ................................ ................................ .............................   
16. Signature:  ................................ ................................ ................................ .....................   
17. The list of documents deposited with the Type Approval Authority which has 
granted approval  is annexed to this communication and can be obtained upon 
request.  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
Annex 2  
12 Annex 2  
  Arrangements of approval marks  
 (See paragraph 4.4. of this Regulation ) 
 
         a = 8 mm min.  
 The above approval mark affixed to a vehicle shows that the vehicle type concerned 
has, with regard to the equipment of a tyre pressure monitoring system, been approved in 
the Netherlands (E  4), pursuant to Regulation No.  141 under approval number 002439 . 
The approval number indicates that the approval was granted  in accordance with the 
requirements of Regulation No.  141 in its original form . 
 
 141R - 002439  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
Annex 3  
13 Annex 3  
  Tests for Tyre  Pressure Monitoring Systems (TPMS)  
1.  Test conditions  
1.1.  Ambient temperature.  
  The ambient temperature shall be between 0  °C and 40  °C. 
1.2.  Road test surface.  
 The road shall have a surface affording good adhesion. The road surface 
shall be dry d uring testing.  
1.3. The tests shall be conducted in an environment free of interferences from 
radio wave.  
1.4. Vehicle conditions.  
1.4.1.  Test weight.  
 The vehicle may be tested at any condition of load, the distribution of the 
mass among the axles being  that stated by the vehicle manufacturer without 
exceeding any of the maximum permissible mass for each axle.  
 However, in the case where there is no possibility to set or reset the system, 
the vehicle shall be unladen. There may be, in addition to the dri ver, a second 
person on the front seat who is responsible for noting the results of the tests. 
The load condition shall not be modified during the test.  
1.4.2.  Vehicle speed.  
 The TPMS shall be calibrated and tested:  
(a) In a speed range from forty km/h an d 120  km/h or the vehicle's 
maximum design speed if it is less than 120  km/h for the puncture test 
to verify the requirements of paragraph  5.2. to this Regulation ; and  
(b) In a speed range from forty km/h and 100  km for the diffusion test to 
verify the req uirements of paragraph  5.3 to this Regulation  and for the 
malfunction test to verify the requirements of paragraph  5.4. to this 
Regulation . 
 The whole speed range shall be covered during the test.  
 For vehicles equipped with cruise control, the cruise con trol shall not be 
engaged during testing.  
1.4.3.  Rim position.  
 The vehicle rims may be positioned at any wheel position, consistent with 
any related instructions or limitations from the vehicle's manufacturer.  
1.4.4.  Stationary location.  
 When the vehicle  is parked, the vehicle's tyres shall be shaded from direct 
sun. The location shall be shielded from any wind that may affect the results.  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
Annex 3  
 
14  1.4.5.  Brake pedal application.  
 Driving time shall not accumulate during service brake application while the 
vehicle  is moving.  
1.4.6.  Tyres.  
 The vehicle shall be tested with the tyres installed on the vehicle according to 
the vehicle manufacturer's recommendation. However, the spare tyre may be 
utilised for testing TPMS malfunction.  
1.5. Accuracy of pressure measureme nt equipment.  
 Pressure measurement equipment to be used for the tests contained in this 
annex shall be accurate to at least +/ -3kPa.  
2.  Test procedure  
 The test shall be performed at a test speed within the range in accordance 
with paragraph  1.4.2. to  this annex, at least once for the test case according to 
paragraph  2.6.1. to this annex ("puncture test"), and at least once for each test 
case according to paragraph  2.6.2. to this annex ("diffusion test").  
2.1. Before inflating the vehicle's tyres, leav e the vehicle stationary outside at 
ambient temperature with the engine off shaded from direct sunlight and not 
exposed to wind or other heating or chilling influences for at least one hour. 
Inflate the vehicle's tyres to the vehicle manufacturer's recomme nded cold 
inflation pressure (P rec), in accordance with the vehicle manufacturer's 
recommendation for the speed and load conditions, and tyre positions. All 
pressure measurements shall be carried out using the same test equipment.  
2.2. With the vehicle sta tionary and the ignition locking system in the "Lock" or 
"Off" position, activate the ignition locking system to the "On" or "Run" 
position. The tyre pressure monitoring system shall perform a check of lamp 
function for the low tyre pressure tell -tale as s pecified in paragraph  5.5.2. of 
this Regulation . This last requirement does not apply to tell -tales shown in a 
common space.  
2.3. If applicable, set or reset the tyre pressure monitoring system in accordance 
with the vehicle manufacturer's recommendations.  
2.4. Learning phase.  
2.4.1.  Drive the vehi cle for a minimum of twenty minutes within the speed range in 
paragraph  1.4.2. to this annex, and with an average speed of eighty  km/h 
(10 km/h). It is allowed to be outside the speed range for a maximum 
cumulati ve time of two minutes during the learning phase.  
2.4.2.  At the discretion of the Technical Service, where the driving test is 
undertaken on a track (circle/oval) with only turns in a single direction, then 
the driving test in paragraph  2.4.1. above shoul d be equally split  
(+/-2 minutes) in both directions.  
2.4.3.  Within the five minutes of completing the learning phase, measure the warm 
pressure of the tyre(s) to be deflated. The warm pressure shall be taken as the 
value P warm. This value will be used fo r subsequent operations.  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
Annex 3  
 
 15 2.5. Deflation phase.  
2.5.1.  Procedure for the puncture test to verify the requirements of paragraph  5.2. to 
this Regulation . 
 Deflate one of the vehicle's tyres  within five minutes of measuring the warm 
pressure as described in pa ragraph  2.4.3. above, until it is at P warm  
-20 per cent, or it is at a minimum pressure of  150 kPa, whichever is higher, 
namely P test. Following a stabilisation period of between two and five minutes 
the pressure P test shall be rechecked and adjusted if n ecessary.  
2.5.2.  Procedure for the diffusion test to verify the requirements of paragraph  5.3. to 
this Regulation . 
 Deflate all four tyres within five minutes of measuring the warm pressure as 
described in paragraph 2.4.3. above, until the deflated tyres a re at P warm  
- 20 per cent plus a further deflation of 7 kPa, namely P test. Following a 
stabilisation period of between two and five minutes the pressure P test shall be 
rechecked and adjusted if necessary.  
2.6. Low tyre pressure detection phase.  
2.6.1.  Procedure for the puncture test to verify the requirements of paragraph  5.2. to 
this Regulation . 
2.6.1.1.  Drive the vehicle along any portion of the test course (not necessarily 
continuously). The sum of the total cumulative drive time shall be the lesser 
of 10  minutes or the time at which the low tyre pressure tell -tale illuminates.  
2.6.2.  Procedure for the diffusion test to verify the requirements of paragraph  5.3. to 
this Regulation . 
2.6.2.1.  Drive the vehicle along any portion of the test course. After not less than 
twenty (20)  minutes and not more than forty (40) minutes bring the vehicle to 
a complete standstill with the engine switched off and the ignition key 
removed for not less than one (1) minute or more than three (3) minutes. 
Resume the test. The sum of the total cumulative drive time shall be the 
lesser of sixty (60)  minutes of cumulative driving under the conditions set out 
in paragraph  1.4.2. above or the time at which the low tyre pressure tell -tale 
illuminates.  
2.6.3.   If the low tyre pressure signal did not illuminate, discontinue the test.  
2.7. If the low tyre pressure tell -tale illuminated during the procedure in 
paragraph  2.6. above, deactivate the ignition locking system to t he ''Off'' or 
''Lock'' position. After a  five minutes period, reactivate the vehicle's ignition 
locking system to the ''On'' (''Run'') position. The tell -tale must illuminate and 
remain illuminated as long as the ignition locking system is in the "On" 
("Ru n") position.  
2.8. Inflate all of the vehicle's tyres to the vehicle manufacturer's recommended 
cold inflation pressure. Reset the system in accordance with the instructions 
of the vehicle manufacturer. Determine whether the tell -tale has extinguished. 
If necessary, drive the vehicle until the tell -tale has been extinguished. If the 
tell-tale does not extinguish, discontinue the test.  FOR STUDYE/ECE/324/Rev.2/Add.140  
E/ECE/TRANS/505/Rev.2/Add.140  
Annex 3  
 
16  2.9. Repetition of the deflation phase.  
 The test may be repeated, at the same or different loads, using the relevant 
test procedures in paragraphs  2.1. to  2.8. above, with the relevant tyre(s) on 
the vehicle under -inflated, in accordance with the provisions of 
paragraph  5.2. or 5.3. to this Regulation , whichever is relevant.  
3.  TPMS malfunction detection  
3.1. Simulate a TPMS  malfunction, for example, by disconnecting the power 
source to any TPMS component, disconnecting any electrical connection 
between TPMS  components, or installing a tyre or wheel on the vehicle that 
is incompatible with the TPMS. When simulating a TPMS mal function, the 
electrical connections for the tell -tale lamps shall not be disconnected.  
3.2. Drive the vehicle for up to ten minutes of cumulative time (not necessarily 
continuously) along any portion of the test course.  
3.3. The sum of the total cumulativ e drive time under paragraph  3.2. shall be the 
lesser of  ten minutes or the time at which the TPMS malfunction tell -tale 
illuminates.  
3.4. If the TPMS malfunction indicator did not illuminate in accordance with 
paragraph  5.4. to this Regulation , as require d, discontinue the test.  
3.5. If the TPMS malfunction indicator is illuminated or illuminates during the 
procedure in paragraphs  3.1 to  3.3 above, deactivate the ignition locking 
system to the ''Off'' or ''Lock'' position. After five minutes, reactivate th e 
vehicle's ignition locking system to the ''On'' (''Run'') position. The TPMS 
malfunction indicator shall again signal a malfunction and remain illuminated 
as long as the ignition locking system is in the ''On'' (''Run'') position.  
3.6. Restore the TPMS t o normal operation. If necessary, drive the vehicle until 
the warning signal has extinguished. If the warning lamp has not 
extinguished, discontinue the test.  
3.7. The test may be repeated using the test procedures in paragraphs  3.1. to  3.6. 
above, with ea ch such test limited to simulation of a single malfunction.