Page 30 of 56
POWER ASSISTED STEERING
Fault finding - Conformity check
36B
36B - 30V6 MR-366-X84-36B000$528_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
SUB-FUNCTION: POWER
NOTESOnly check conformity after a complete check using the diagnostic tool. The values
shown in this conformity check are given as examples.
Test condition: ENGINE AT IDLE SPEED.
Order FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
1EngineET023:Engine
operationRUNNINGIn the event of a fault, test the
multiplex network.
2Computer
supplyPR108:Computer feed
voltage12 V < X < 16 VIf the computer supply
voltage is not sufficient,
dialogue cannot be
established.
If PR108 is not correct, run
fault finding on the charge
circuit.
Page 31 of 56

POWER ASSISTED STEERING
Fault finding - Conformity check
36B
36B - 31V6 MR-366-X84-36B000$528_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
SUB-FUNCTION: ASSISTANCE
NOTESOnly check conformity after a complete check using the diagnostic tool. The values
shown in this conformity check are given as examples.
Test condition: ENGINE AT IDLE SPEED.
Order FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
1Steering
wheel
angleET020:Steering wheel
angle sensor
programmingStatus 4: calibrated
and initialisedIn the event of a fault, refer to
the interpretation of status
ET020.
PR121:Steering wheel
angle0˚ with the wheels set
straight ahead
+ or - 570˚ ± 20˚ at full
lockIn the event of a fault, consult
the interpretation of PR121.
2Vehicle
speedPR003:Vehicle speed0 mph (km/h) when
stationaryIn the event of a fault, test the
multiplex network.
3TorquePR001:Torque applied to
the steering wheel- 11 Nm < X
< + 11 Nm
with action on the
steering wheelIn the event of a fault, consult
the interpretation of PR001.
PR006:Steering motor
torque setpoint0 Nm ± 0.2 NmIn the event of a fault, consult
the interpretation of PR006.
4Motor
powerPR012:Current absorbed
by the motor- 90 < X < 90A ± 5AIn the event of a fault, consult
the interpretation of PR012.
PR013:Setpoint for
current absorbed
by the motor- 90 < X < 90A ± 5ANone
5Thermal
protectionPR119:Motor thermal
protection
indicatorInterior temperature
± 5 ˚CIf PR119 > 60 ˚C, thermal
protection is activated.
The assistance level PR140
= 15 %.
To deactivate thermal
protection, switch off the
engine and do not operate the
EPAS for 15 minutes. PR014:Level of
assistance
available100 % idle speed
15 % if thermal
protection activated.
Page 32 of 56
POWER ASSISTED STEERING
Fault finding - Conformity check
36B
36B - 32V6 MR-366-X84-36B000$528_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
SUB-FUNCTION: ASSISTANCE (CONTINUED)
NOTESOnly check conformity after a complete check using the diagnostic tool. The values
shown in this conformity check are given as examples.
Test condition: ENGINE AT IDLE SPEED.
Order FunctionParameter or Status
checked or ActionDisplay and Notes Fault finding
6Computer
calibrationET026:Computer
calibrationConfiguration 1 to 5
according to
equipment and vehicle
type.Redefine the vehicle
specifications using
command SC001 Computer
calibration.
Page 39 of 56

POWER ASSISTED STEERING
Fault finding - Parameter interpretation
36B
36B - 39V6 MR-366-X84-36B000$792_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12POWER ASSISTED STEERING
Fault finding - Parameter interpretation
PR003
VEHICLE SPEED
NOTESThis signal is sent by the ABS computer to the multiplex network.
The vehicle speed signal can adapt the steering assistance to the vehicle speed.
PR003 must be equal to the actual vehicle speed, within 6 mph (10 km/h).
If the parameter does not match the actual vehicle speed:
–run fault finding on the multiplex network using the diagnostic tool,
–consult the interpretation of faults DF033 Multiplex network and DF057 Vehicle speed multiplex signal.
If the fault is still present, contact the Techline.
Note:
If the vehicle speed multiplex signal is absent or invalid, the value displayed on the tool is 0 or a fixed value
(depending on the configuration).
AFTER REPAIRCarry out a road test, followed by a check with the diagnostic tool.
DAETRW_V04_PR003/DAETRW_V08_PR003/DAETRW_V06_PR003/DAETRW_V0C_PR003 /
DAETRW_V12_PR003
MR-366-X84-36B000$792_eng.mif
Page 42 of 56

POWER ASSISTED STEERING
Fault finding - Parameter interpretation
36B
36B - 42V6 MR-366-X84-36B000$792_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
PR014
LEVEL OF ASSISTANCE AVAILABLE
The assistance level is the percentage of assistance authorised by the power-assisted steering computer.
This assistance level depends:
–on the status of the vehicle engine (started or stopped),
–on any system faults,
–on the system temperature,
–battery voltage.
Parameter PR014 relates to EPAS motor thermal protection.
Assistance limitation due to an excessively high temperature, can be deactivated by not actuating the steering
system for at least 15 minutes.
Note:
In normal operation, with the engine running and a battery voltage greater than or equal to 10 V, the displayed
value of PR014 should be 100 % and may fall to approximately 15 % if thermal protection is active. It is at 0 % if
the battery voltage is less than or equal to 9 V or 99 % with the engine stopped or stalled.
AFTER REPAIRCarry out a road test, followed by a check with the diagnostic tool.
DAETRW_V04_PR014/DAETRW_V08_PR014/DAETRW_V06_PR014/DAETRW_V0C_PR014 /
DAETRW_V12_PR014
Page 45 of 56

POWER ASSISTED STEERING
Fault finding - Customer complaints
36B
36B - 45V6 MR-366-X84-36B000$858_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12POWER ASSISTED STEERING
Fault finding - Customer complaints
NO DIALOGUE WITH THE COMPUTER ALP1
LOSS OF VEHICLE ASSISTANCE WITHOUT WARNING ALP2
POOR VEHICLE HANDLINGALP3
THE STEERING WHEEL DOES NOT RETURN BY ITSELF TO THE
CENTRE AT LOW VEHICLE SPEED: STEERING WHEEL SELF-
CENTRING INACTIVEALP4
UNDER-ASSISTANCE AT LOW SPEED AND OVER-ASSISTANCE AT
HIGH SPEEDALP5
TOO LITTLE ASSISTANCEALP6
ASSISTANCE AVAILABLE FOR 5 MIN. AFTER SWITCHING OFF THE
IGNITIONALP7
ASSISTANCE AVAILABLE BUT CHECK STEERING WARNING
MESSAGE DISPLAYED AND SERVICE WARNING LIGHT LIT
CONSTANTLY OR FLASHING AT 8 HzALP8
Vdiag 06 and 12 only
SERVICE INDICATOR LIGHT AND CHECK STEERING MESSAGE
COME ON STRAIGHT AWAYALP9
THE VEHICLE PULLS TO THE RIGHT OR TO THE LEFT ALP10
THE ENGINE DOES NOT START AND THE "STEERING NOT
UNLOCKED" IS DISPLAYED
OR
"STEERING NOT LOCKED" AFTER THE IGNITION IS SWITCHED
OFFALP11
MR-366-X84-36B000$858_eng.mif
Page 53 of 56
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 53V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP8Assistance available but Check steering warning message
displayed and Service warning light lit continuously or flashing
at 8 Hz
NOTESNone
Check the vehicle battery voltage and the condition of the system's connections.
Repair if necessary.
Check the steering wheel angle sensor programming (ET020 = STATUS 4)
If the sensor is not calibrated, program the steering wheel angle sensor (procedure VP004 Steering wheel angle
sensor programming).
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a check with the diagnostic tool.
DAETRW_V04_ALP08/DAETRW_V08_ALP08/DAETRW_V08_ALP08/DAETRW_V0C_ALP08/
DAETRW_V12_ALP08
Page 56 of 56
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 56V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP11The engine does not start and the "steering not unlocked" or
"steering not locked" message is displayed after the ignition is
switched off
NOTESSpecial notes:
An electric power-assisted steering failure is not the reason these messages are
displayed.
Check the UCH (see 87B, Passenger compartment connection unit)
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a complete check using the diagnostic tool.
DAETRW_V04_ALP11 /DAETRW_V08_ALP11 /DAETRW_V06_ALP11/DAETRW_V0C_ALP11/
DAETRW_V12_ALP11