Page 49 of 56
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 49V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP4The steering wheel does not return by itself to the centre at low
vehicle speed: steering wheel self-centring inactive
NOTES
Check the condition and pressure of the tyres, the condition of the joints and the axle geometries.
Check the vehicle's battery voltage.
Repair if necessary.
Check that the steering wheel angle sensor is correctly calibrated and consistent with the position of the steering
wheel (status ET020 at status 3 or 4 and PR121 at 0˚ ± 5˚ with wheels set straight ahead).
Program the steering wheel angle again if necessary (see 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_ALP04/DAETRW_V08_ALP04/DAETRW_V06_ALP04/DAETRW_V0C_ALP04/
DAETRW_V12_ALP04
Page 50 of 56
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 50V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP5Under-assistance at low speed and over-assistance at
high speed
NOTESNone
Check the vehicle's battery voltage.
Repair if necessary.
Make sure that the computer calibration ET026 is in order (consult the help for ET026 on the Clip tool). Calibrate
the computer using command SC001 if necessary.
Check the conformity of PR003 Vehicle speed.
Carry out a multiplex network test.
Check the integrity of the multiplex network (see 88B, Multiplex).
Deal with any faults.
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_ALP05/DAETRW_V08_ALP05/DAETRW_V06_ALP05/DAETRW_V0C_ALP05/
DAETRW_V12_ALP05
Page 51 of 56
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 51V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP6 Too little assistance
NOTESAt full lock, steering assistance is reduced after 5 seconds.
Check the pressures and condition of the tyres, the condition of the joints and the front axle geometry.
Check the vehicle's battery voltage.
Repair if necessary.
Make sure that computer calibration ET026 is in order (consult the help for ET026 on the Clip tool). Calibrate the
computer using command SC001 if necessary.
Check the conformity of PR014 Assistance level available.
Do not use the electric power steering for about fifteen minutes.
Make sure that no components located in the vicinity of the electric power steering are promoting a temperature
rise in the system.
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_ALP06/DAETRW_V08_ALP06/DAETRW_V06_ALP06/DAETRW_V0C_ALP06/
DAETRW_V12_ALP06
Page 52 of 56
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 52V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP7 Assistance available for 5 minutes after switching off the ignition
NOTESThis fault may occur if the engine operating status multiplex signal is defective.
Check the vehicle's battery voltage.
Repair if necessary.
Test the multiplex network.
Check the integrity of the multiplex network (see 88B, Multiplexing).
Deal with any faults.
Check the conformity of ET023 and PR003.
Run fault finding on the injection and ABS.
Repair if necessary.
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_ALP07/DAETRW_V08_ALP07/DAETRW_V06_ALP07/DAETRW_V0C_ALP07/
DAETRW_V12_ALP07
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 54 of 56
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 54V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP9The Service indicator light and the Check Steering message
come on straight away
NOTESApply the fault finding procedure only on Vdiag 06 and 12.
Check the conformity of the battery voltage and carry out fault finding on the charge circuit if necessary.
Check the condition and conformity of the ABS computer connector and its clips.
Check that the ABS computer has an electrical feed (see wiring diagram for the ABS fitted on the vehicle).
Disconnect the 8-track electric power assisted steering computer connector.
Check the condition and conformity of the connector and its clips.
If there is a repair procedure (see Technical Note 6015A, Electrical wiring repair, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
Carry out fault finding on the multiplex network (see 88B, Multiplexing).
Check the insulation, continuity and the absence of interference resistance on the following connections:
Electric power-
assisted steering
computer (8-track
connector)UCH
(PE2 40-track
connector)Protection and
Switching Unit (CT1
12-track connector)
track 7 track 8
track 5 track 18
track 6 track 8
track 16 track 1
track 3 ABS computer
track 2 ABS computer
(see wiring
diagram of the ABS
system installed in
the vehicle)
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise replace it.
If the connections previously checked are correct, contact the Techline.
AFTER REPAIRCarry out a check using the diagnostic tool.
DAETRW_V04_ALP09/DAETRW_V06_ALP09/DAETRW_V08_ALP09/DAETRW_V0C_ALP09/
DAETRW_V12_ALP09
Page 55 of 56
POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 55V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP10 The vehicle pulls to the right or to the left
NOTESNone
Check that the casing under the steering wheel does not rub on the steering column or steering wheel.
Check the tyre pressures and the condition of the joints and the steering geometry.
Repair if necessary.
Check status ET020 Steering wheel angle sensor programming, which must be STATUS 4.
Position the vehicle wheels in the straight line driving position (steering centre point).
Consult parameter PR121 Steering wheel angle which must be between - 10d˚ < X < 10d˚.
Turn the steering wheel to full right lock then to full left lock, and check that the parameter varies within the
tolerances given in the Conformity check.
Check the position of the steering wheel on the splines of the steering column.
If parameter PR121 Steering wheel angle and status ET020 Steering wheel angle sensor programming listed
above are not correct:
Place the vehicle on a front axle adjusting bench.
Position the vehicle wheels in the straight line driving position (steering centre point).
Program the steering wheel angle using command VP004 Steering wheel angle sensor programming (see
Configuration and programming).
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a complete check using the diagnostic tool.
DAETRW_V04_ALP10/DAETRW_V08_ALP03/DAETRW_V06_ALP10/DAETRW_V0C_ALP10/
DAETRW_V12_ALP10
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
