Regulation No. 64-02

Name:Regulation No. 64-02
Description:Temporary Spare Wheels, Tyres, Run Flat Tyres and Tyre Pressure Monitoring Systems.
Official Title:Uniform Provisions Concerning the Approval of: Vehicles with Regard to their Equipment Which May Include: a Temporary Use Spare Unit, Run Flat Tyres and/or a Run Flat System, and/or a Tyre Pressure Monitoring System.
Country:ECE - United Nations
Date of Issue:2010-11-09
Amendment Level:02 Series, Supplement 2
Number of Pages:30
Vehicle Types:Car, Component, Light Truck
Subject Categories:Prior Versions
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Keywords:

vehicle, tyre, approval, regulation, pressure, system, paragraph, test, spare, warning, type, temporary-use, unit, wheel, speed, position, requirements, run-flat, amendments, series, tyres, time, monitoring, signal, maximum, force, fitted, vehicles, ignition, annex, run, tpms, accordance, malfunction, paragraphs, means, defined, case, date, axle, entry, manufacturer, granted, approved, procedure, distance, equipment, drive, tell-tale, tested

Text Extract:

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E/ECE/324
) Rev.1/Add.63/Rev.1/Amend.2
E/ECE/TRANS/505 )
February 14, 2013
STATUS OF UNITED NATIONS REGULATION
ECE 64-02
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
VEHICLES WITH REGARD TO THEIR EQUIPMENT WHICH MAY INCLUDE
A TEMPORARY USE SPARE UNIT, RUN FLAT TYRES AND/OR A
RUN FLAT SYSTEM, AND/OR A TYRE PRESSURE MONITORING SYSTEM
Incorporating:
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 17.09.89
Supplement 2 to the 00 series of amendments
Date of Entry into Force: 30.10.03
01 series of amendments
Date of Entry into Force: 03.02.08
Corr. 1 of 18.01.08 to the 01 series of amendments
Dated: 03.02.08
02 series of amendments
Date of Entry into Force: 19.08.10
Corr. 1 of 30.07.10 to the 02 series of amendments
Dated: 19.08.10
Supplement 1 to the 02 series of amendments
Date of Entry into Force: 13.04.12
Supplement 2 to the 02 series of amendments
Date of Entry into Force: 27.01.13

REGULATION NO. 64
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF VEHICLES WITH REGARD TO
THEIR EQUIPMENT WHICH MAY INCLUDE: A TEMPORARY USE SPARE UNIT, RUN FLAT
TYRES AND/OR A RUN FLAT SYSTEM, AND/OR A TYRE PRESSURE MONITORING SYSTEM
REGULATION
1. Scope
2. Definitions
3. Application for Approval
4. Approval
5. Specifications and Tests
6. Supplementary Information
CONTENTS
7. Modifications and Extension of Approval of the Vehicle Type
8. Conformity of Production
9. Penalties for Non-conformity of Production
10. Production Definitely Discontinued
11. Names and Addresses of Technical Services Responsible for Conducting Approval Tests,
and of Administrative Departments
12. Transitional Provisions
ANNEXES
Annex 1 – Communication Concerning the Approval (or Refusal or Extension or Withdraw of Approval
or Production Definitely Discontinued) of a Vehicle Type with Regard to its Equipment With
Temporary-use Unit, Pursuant to Regulation No. 64.
Annex 2 – Arrangements of Approval Marks
Annex 3 – Braking and Deviation test for Vehicles Fitted With Temporary-use Spare Units
Annex 4 – Test requirements for Run-Flat Warning System (RFWS)
Annex 5 − Test requirements for Tyre Pressure Monitoring Systems (TPMS)

2.2.2. "Vehicle type with regard to its tyre pressure monitoring system":
2.2.2.1. The manufacturer’s trade name or mark;
2.2.2.2. Vehicle features which significantly influence the performances of the tyre pressure
monitoring system;
2.2.2.3. The type and design of the tyre pressure monitoring system.
2.3. "Wheel" means a complete wheel consisting of a rim and a wheel disc;
2.3.1. "Wheel size designation" means a designation comprising at least the nominal rim
diameter, the nominal rim width and the rim profile;
2.3.2. "Wheel offset" means the distance from the hub abutment face to the centre line of the rim.
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 greater than atmospheric pressure. It may be a:
2.4.1. "Normal tyre" being a tyre that is suitable for all normal, on-road, conditions of use;
2.4.2. "Temporary-use spare tyre" being a tyre that is specifically designed to be different from a
normal tyre and intended only for temporary-use under restricted driving conditions;
2.4.3. "Run-flat tyre" or "Self supporting tyre" describes a pneumatic tyre structure provided
with any technical solutions (for example, reinforced sidewalls, etc.) allowing the pneumatic
tyre, mounted on the appropriate wheel and in the absence of any supplementary
component, to supply the vehicle with the basic tyre functions, at least, at a speed of 80km/h
(50mph) and a distance of 80km when operating in flat tyre running mode;
2.4.4. "Run-flat system" or "Extended mobility system" describes an assembly of specified
functionally dependant components, including a tyre, which together provide the specified
performance granting the vehicle with the basic tyre functions, at least, at a speed of 80km/h
(50mph) and a distance of 80km when operating in flat tyre running mode.
2.5. "Flat tyre running mode" describes the state of tyre, essentially maintaining its structural
integrity, while operating at an inflation pressure between 0 and 70 kPa.
2.6. "Basic tyre function" means the normal capability of an inflated tyre in supporting a given
load up to a given speed and transmitting the driving, the steering and the braking forces to
the ground on which it runs.
2.7. "Tyre size designation" means a combination of figures that uniquely identify the
geometric size of the tyre, comprising the nominal section width, the nominal aspect ratio
and the nominal diameter. Precise definitions of these features may be found in
Regulation No. 30.
2.8. "Tyre structure" means the technical characteristics of the tyre's carcass. This may be bias
ply (diagonal or cross ply), bias-belted, radial ply or run-flat tyre as further defined in
Regulation No. 30.

2.14. "Tyre Pressure Monitoring 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
vehicle is running.
2.15. "Cold tyre inflation pressure" means the tyre pressure at ambient temperature, in the
absence of any pressure build-up due to tyre usage.
2.16. "Recommended cold inflation pressure (P )" means the pressure recommended for
each tyre position by the vehicle manufacturer, for the 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.
2.17.
"In service operating pressure (P
)" means the inflation pressure for each tyre position
elevated from the cold pressure (P
) by temperature effects during vehicle usage.
2.18. "Test Pressure (P )" means the actual pressure of the tyre(s) selected for each tyre
position after deflation during the test procedure.
2.19. "Type of Tyre Pressure Monitoring System" means systems which do not differ
significantly in such essential aspects as:
(a)
(b)
The principle of operation;
Any components which are likely to have a significant influence on the performance of
the system as specified under Paragraph 5.3 to this Regulation.
3. APPLICATION FOR APPROVAL
3.1. The application for approval of a vehicle type with regard to its equipment with:
(a)
(b)
A temporary-use spare unit (including, where applicable, a run-flat warning system);
and/or
A tyre pressure monitoring system;
shall be submitted by the vehicle manufacturer or by his duly accredited representative;
3.2. It shall be accompanied, in 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 Administrative Department shall verify the existence of satisfactory arrangements for
ensuring effective control of the conformity of production before type approval is granted.

4.4.3. A dash and the approval number to the right of the markings prescribed in
Paragraphs 4.4.1. and 4.4.2.
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 Regulation 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 Paragraph 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. Tyres intended for use as part of a temporary-use spare unit as defined in Paragraph 2.10.,
shall be approved in accordance with Regulations Nos. 30 or 54.
5.1.2. For vehicles having at least four wheels, the load capacity of the temporary-use spare unit
shall be at least equal to one half of the highest of the maximum axle loads of the vehicle; if
its use is restricted to a specific axle mentioned in the instructions in Paragraph 6. below, its
load capacity shall be at least equal to one half of the maximum load of that axle.
5.1.3. The design speed of the temporary-use spare unit shall be at least 120km/h for Types 1, 2
and 3.

5.1.4.1.1. An 120km/h maximum speed warning symbol arranged in accordance with the diagram
below shall be permanently displayed on the outer face of the wheel in a prominent position.
In the case of vehicles intended to be sold in countries using imperial units of measurement,
an additional warning symbol, identical to that described above, with the exception that the
figure "120" shall be replaced by "75" and the wording "km/h" by "mph", shall be
permanently displayed on the outer face of the wheel in a prominent position.
Alternatively a single warning symbol arranged in accordance with the diagram below, shall
be permanently displayed on the outer face of the wheel in a prominent position.
Upper case letters shall be at least 5mm high and the numbers "120" and "75" shall be at
least 20mm high with the elements that make up each character of the number at least 3mm
line thickness. Lower case text shall at least have a line height of 5mm. All text shall be
enclosed in a border and be on a background of contrasting colour.
For a Type 4 temporary-use spare unit as defined in Paragraph 2.10.4., either the
requirements of this Paragraph or the requirements of Paragraph 5.1.4.1. shall apply, at the
request of the vehicle manufacturer.
5.1.4.2. When mounted to the vehicle for temporary-use the outward facing surface of the wheel
and/or tyre shall exhibit a distinctive colour or colour pattern which is quite clearly different
from the colour(s) of the standard units. If it is possible to attach a wheel cover to the
temporary-use spare unit, the distinctive colour or colour pattern shall net be obscured by
this wheel cover.

5.3. Tyre Pressure Monitoring Systems (TPMS)
5.3.1. General Requirements
5.3.1.1. Subject to the requirements of Paragraph 12., any vehicle of Categories M up to 3,500kg
and N , in both cases with all axles equipped with single tyres, and fitted with a tyre
pressure monitoring system complying with the definition of Paragraph 2.14. shall meet the
performance requirements contained in Paragraphs 5.3.1.2. to 5.3.5.5. below and shall be
tested in accordance with Annex 5.
5.3.1.2. Any tyre pressure monitoring system fitted on a vehicle shall comply with the requirements
of Regulation No. 10.
5.3.1.3. The system shall operate from a speed of 40km/h or below, up to the vehicle's maximum
design speed.
5.3.2. Tyre pressure detection for incident-related pressure loss (puncture test).
5.3.2.1. The TPMS shall be tested according to the test procedure set out in Paragraph 2.6.1. of
Annex 5. When tested to this procedure, the TPMS shall illuminate the warning signal
described in Paragraph 5.3.5 not more than 10min after the in service operating pressure in
one of the vehicle's tyres has been reduced by 20% or it is at a minimum pressure of
150kPa, whatever is higher.
5.3.3. Detection for a tyre pressure level significantly below the recommended pressure for
optimum performance including fuel consumption and safety (diffusion test).
5.3.3.1. The TPMS shall be tested according to the test procedure set out in Paragraph 2.6.2. of
Annex 5. When tested to this procedure, the TPMS shall illuminate the warning signal
described in Paragraph 5.3.5. within not more than 60min of cumulative driving time after
the in-service operating pressure in any of the vehicle's tyres, up to a total of four tyres, has
been reduced by 20%.
5.3.4. Malfunction Detection Test
5.3.4.1. The TPMS shall be tested according to the test procedure set out in Paragraph 3. of
Annex 5. When tested to this procedure, the TPMS shall illuminate the warning signal
described in Paragraph 5.3.5. not more than 10min 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. If the system is blocked by external influence
(e.g. radiofrequency noise), the malfunction detection time may be extended.
5.3.5. Warning Indication
5.3.5.1. The warning indication shall be by means of an optical warning signal conforming to
Regulation No. 121.
5.3.5.2. 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
space.
5.3.5.3. 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.

6.2.3. 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.
6.3. If no owner's manual is supplied with the vehicle, the information required in Paragraph 6.1.
and/or 6.2. 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 shall be notified to the Administrative Department
which granted the type approval. The department may then either:
7.1.1. Consider that the modifications made are unlikely to have appreciable adverse effects and
that in any event the vehicle still complies with the requirements; or
7.1.2. Require a further test report from the Technical Service responsible for conducting the tests.
7.2. Confirmation or refusal of approval, specifying the alterations, shall be notified by the
procedure specified in Paragraph 4.3. above to the Parties to the Agreement applying this
Regulation.
7.3. The Administrative Department issuing the extension of approval shall assign a series
number to each communication form drawn up for such an extension.
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 Administrative Department which has granted type approval, 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 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".
10. PRODUCTION DEFINITELY 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 authority shall inform thereof the
other 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".

ANNEX 1
COMMUNICATION
(Maximum format: A4 (210 × 297mm))
issued by:
Name of administration:
.....................................
.....................................
.....................................
Concerning:
APPROVAL
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITELY DISCONTINUED
of a vehicle type with regard to their equipment which may include: a temporary-use spare unit, run-flat
tyres and/or a run-flat system , and/or a tyre pressure monitoring system pursuant to Regulation No. 64.
Approval No. .................................................. Extension No. ................................
1. Trade name or mark of the vehicle: ...........................................................................................
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: ................................................................................................................

ANNEX 2
ARRANGEMENTS OF APPROVAL MARKS
Model A
(See Paragraph 4.4. of this Regulation)
The above approval mark affixed to a vehicle shows that the vehicle type concerned has, with regard to
the equipment of temporary-use spare unit(s), been approved in the Netherlands (E 4), pursuant to
Regulation No. 64 under approval number 022439. The approval number indicates that the approval was
granted in accordance with the requirements of Regulation No. 64, incorporating the 02 series of
amendments.
Model B
(See Paragraph 4.5 of this Regulation)
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. 64 under approval number 022439. The approval number indicates that the approval was
granted in accordance with the requirements of Regulation No. 64, incorporating the 02 series of
amendments.

ANNEX 3
BRAKING AND DEVIATION TEST FOR VEHICLES FITTED WITH
TEMPORARY-USE SPARE UNITS
1. GENERAL CONDITIONS
1.1. The test track shall be substantially level and have a surface affording good adhesion.
1.2. The test shall be performed when there is no wind liable to affect the results.
1.3. The vehicle shall be loaded to its maximum mass as defined in Paragraph 2.9. of this
Regulation.
1.4. The axle loads resulting from the loading condition in accordance with Paragraph 1.3. of this
Annex shall be proportional to the maximum axle loads as defined in Paragraph 2.10 of this
Regulation.
1.5. Except in the case of a run-flat tyre, the tyres shall be inflated to the pressures
recommended by the vehicle manufacturer for the vehicle type and loading condition. A runflat
tyre shall be tested in the fully deflated condition.
2. BRAKING AND DEVIATION TEST
2.1. The test shall be carried out with the temporary-use spare unit fitted alternately in place of
one front wheel and one rear wheel. However, if use of the temporary-use spare unit is
restricted to a specific axle, the test shall be carried out only with the temporary-use spare
unit fitted to that axle.
2.2. The test shall be carried out using the service braking system from an initial speed of
80km/h with the engine disconnected.
2.3. The braking performance shall correspond to the test procedure given in Regulation No. 13
or 13-H for Categories M and N vehicles for the Type O cold test with the engine
disconnected, and is based on the stopping distance and the mean fully developed
deceleration. The performance of the vehicle shall be determined by measuring the stopping
distance in relation to the prescribed speed of the vehicle and/or by measuring the mean
fully developed deceleration during the test.

2.3.1.3. In the case of N Category vehicles approved to Regulation No. 13 fitted with Type 4 spare
unit as defined in Paragraph 2.10.4. and tested using a prescribed speed of 120km/h:
The stopping distance achieved using a maximum force of 700 N applied to the foot control,
shall not exceed 128.8m and;
The mean fully developed deceleration (d ) shall be calculated as the deceleration
averaged with respect to distance over the interval v to v , according to the formula given in
Paragraph 2.3.1. and shall be not less than 5.0m/s .
2.3.1.4. In the case of M or N Category vehicles approved to Regulation No. 13-H fitted with
Types 1, 2, 3 and 5 temporary-use spare units as defined in Paragraphs 2.10.1., 2.10.2.,
2.10.3. and 2.10.5. and tested using a prescribed speed of 80km/h;
The stopping distance achieved using a maximum force of 500N + 0 / -50N applied to the
foot control, shall not exceed 46.4m and;
The mean fully developed deceleration (d ) shall be calculated as the deceleration
averaged with respect to distance over the interval v to v according to the formula given in
Paragraph 2.3.1. and shall be not less than 6.43ms :
2.3.1.5. In the case of M and N Category vehicles approved to Regulation No. 13-H fitted with
Type 4 temporary-use spare unit as defined in Paragraph 2.10.4. and tested using a
prescribed speed of 120km/h;
The stopping distance achieved using a maximum force of 500N + 0 / -50N applied to the
foot control, shall not exceed 98.4m and;
The mean fully developed deceleration (d ) shall be calculated as the deceleration
averaged with respect to distance over the interval v to v , according to the formula given in
Paragraph 2.3.1. and shall be not less than 6.43ms :
2.4. Tests shall be carried out for each of the fitting conditions of temporary-use spare units
specified in Paragraph 2.1. of this Annex.
2.5. The prescribed braking performance shall be obtained without any wheel-locking, deviation
of the vehicle from its intended course, abnormal vibration, abnormal wear of the tyre during
the test or excessive steering correction.

2.1.1.6. If the warning signal as required in Paragraph 2.1.1.5. above has activated, wait 5 minutes
before turning the ignition on; the signal must reactivate and remain active as long as the
ignition switch is in the "on" ("run") position.
2.1.1.7. Repeat the process described in Paragraphs 2.1.1.1. to 2.1.1.6., but with a test speed of
130km/h or higher. All the relevant requirements shall be met for both test speeds.
2.1.2. Test 2
2.1.2.1. The tyres are to be inflated to the pressure recommended by the vehicle manufacturer.
2.1.2.2. With the vehicle stationary and the ignition (start) switch in the "Lock" or "Off" position, turn
the ignition (start) switch to the "On" ("Run") position or, where applicable, the appropriate
key position. Confirm the activation of the warning signal. Turn off the ignition.
2.1.2.3. Produce on one tyre a gradual pressure loss of between 10kPa/min and 20kPa/min.
2.1.2.4. Drive the vehicle at any speed above 25km/h.
2.1.2.5. The test requirement is satisfied if the system delivers an alert by the time the pressure drop
has reached 100kPa.
2.2. Test procedures for detecting a failure of the Run-Flat Warning System
2.2.1. With the vehicle in the normal use condition, simulate a Run-Flat Warning System failure.
This may be simulated by, for example, disconnecting connectors for wiring related to the
power supply from the power source or wiring related to the input/output to/from the warning
system control.
2.2.2. With a simulated fault introduced, drive the vehicle normally between 40 and 100km/h.
2.2.3. When:
(a)
The run-flat malfunction signal as described in Paragraph 5.1.6.4. has activated or;
(b) A period of 5min has elapsed, when determined in accordance with Paragraph 2.3.,
from the time the test speed has been reached. If the warning does not activate the
test has failed.
The vehicle shall be brought to a halt and the ignition switched off.
2.2.4. If the warning signal as required in Paragraph 2.2.3. above has activated, wait 5min before
turning the ignition on; the signal must reactivate and remain active as long as the ignition
switch is in the "on" ("run") position.

ANNEX 5
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 during
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 driver, 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)
(b)
In a speed range from 40km/h and 120km/h or the vehicle's maximum design speed if
it is less than 120km/h for the puncture test to verify the requirements of
Paragraph 5.3.2. to this Regulation; and
In a speed range from 40km/h and 100km for the diffusion test to verify the
requirements of Paragraph 5.3.3 to this Regulation and for the malfunction test to
verify the requirements of Paragraph 5.3.4. to this Regulation.
The whole speed range shall be covered during the test.
For vehicles equipped with cruise control, the cruise control 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.

2.4.3. Within the 5min 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 . This value will be used
for subsequent operations.
2.5. Deflation Phase
2.5.1. Procedure for the puncture test to verify the requirements of Paragraph 5.3.2. to this
Regulation.
Deflate one of the vehicle's tyres within 5min of measuring the warm pressure as described
in Paragraph 2.4.3. above, until it is at P - 20%, or it is at a minimum pressure of
150kPa, whichever is higher, namely P . Following a stabilisation period of between 2 and
5min the pressure P shall be rechecked and adjusted if necessary.
2.5.2. Procedure for the diffusion test to verify the requirements of Paragraph 5.3.3. to this
Regulation.
Deflate all four tyres within 5min of measuring the warm pressure as described in
Paragraph 2.4.3. above, until the deflated tyres are at P - 20% plus a further deflation of
7kPa, namely P . Following a stabilisation period of between 2 and 5min the pressure P
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 5.3.2. 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 10min 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 5.3.3. to this
Regulation.
2.6.2.1. Drive the vehicle along any portion of the test course. After not less than 20min and not
more than 40 minutes bring the vehicle to a complete standstill with the engine switched off
and the ignition key removed for not less than 1 minute or more than 3min. Resume the test.
The sum of the total cumulative drive time shall be the lesser of 60min 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 the ''Off'' or ''Lock'' position. After a 5min 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"
("Run") 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.

Temporary Spare Wheels, Tyres, Run Flat Tyres and Tyre Pressure Monitoring Systems.