Page 23 of 56

POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 23V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF057
PRESENT
OR
STOREDMULTIPLEX VEHICLE SPEED SIGNAL
DEF : CAN connection fault
NOTESSpecial notes:
Although stored in the computer, this fault is not caused by an electric power-assisted
steering failure, but by a multiplex network fault.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after a road test.
Check that:
–there is a + 12 V before ignition feed on track 1 of the electric power steering black 2-track connector,
–there is an earth on track 2 of the electric power steering black 2-track connector,
–there is a + 12 V after ignition feed on track 8 of the steering column assembly black 8-track connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Check the continuity of the wiring harness for the multiplex network (see 88B, Multiplexing):
Black 8-track connector track 5CAN_L
Black 8-track connector track 7CAN_H
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Multiplex network: repair),
repair the multiplex connection, otherwise change the multiplex connection.
Run a multiplex network test and make sure there are no faults.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF057/DAETRW_V08_DF057/DAETRW_V06_DF057/DAETRW_V0C_DF057/
DAETRW_V12_DF057
Page 24 of 56

POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 24V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF059
PRESENT
OR
STOREDANGLE SENSOR
DEF : Sensor internal electronic fault
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after a steering wheel movement from full lock to full lock
or a road test.
Check that:
–there is a + 12 V before ignition feed on track 1 of the electric power steering black 2-track connector,
–there is an earth on track 2 of the electric power steering black 2-track connector,
–there is a + 12 V after ignition feed on track 8 of the steering column assembly black 8-track connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Program the steering wheel angle sensor using command VP004 Steering wheel angle sensor programming.
If the fault is still present, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF059/DAETRW_V08_DF059/DAETRW_V06_DF059/DAETRW_V0C_DF059/
DAETRW_V12_DF059
Page 46 of 56

POWER ASSISTED STEERING
36B
36B - 46V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
ALP1 No dialogue with the computer
NOTESNone
Check the vehicle's battery voltage.
Repair if necessary.
Try the diagnostic tool on another computer on the same vehicle, or on a different vehicle.
Check the condition of the 5A fuse on the UPC (shared between Electric power-assisted steering and Airbag) and
attempt to run fault finding on the system.
If the condition of the fuse is not the cause, carry out the following operations:
–activate forced + after ignition feed or have the engine running,
–disconnect the Electric Power Assisted Steering power connector,
–check the connection by pushing and pulling the connector,
–try running fault finding again using the tool,
–if dialogue can be established the fault is repaired,
–if the fault is still present, apply the following procedure.
Check the electric power-assisted steering and engine compartment fuses (70A) and the passenger compartment
fuse (5A).
Check the continuity and absence of interference resistance on the wiring harness between the battery and
the variable power assisted steering computer:
Black 2-track connector track 1 + Battery
Black 2-track connector track 2 Battery 0 V
Black 8-track connector track 8 + After ignition
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Run fault finding on the multiplex network.
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_ALP01/DAETRW_V08_ALP01/DAETRW_V06_ALP01/DAETRW_V0C_ALP01/
DAETRW_V12_ALP01
MR-366-X84-36B000$924_eng.mif
Page 47 of 56

POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 47V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP2 Loss of vehicle assistance without warning
NOTES–apply the ALP after a complete check with the diagnostic tool,
–check the conformity of ET026 Computer calibration.
The vehicle loses the assistance function if the electric power assisted steering fuse is broken or the power supply
is lost.
The driver will feel the loss of the assistance on the steering wheel. Steering will then be the same as for unassisted
steering, manoeuvrable when driving even at low speed, but very difficult to manoeuvre when stationary.
Without its power supply, the power-assisted steering computer can no longer illuminate the warning light, and so
the driver is not made aware of the fault.
Check the electric power-assisted steering and engine compartment fuses (70A) and the passenger compartment
fuse (5A).
Change the fuses if necessary.
Check the computer supply voltage:
Black 2-track connector track 1 Vehicle earth
Black 8-track connector track 8 Vehicle earth
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the wiring, otherwise change the wiring.
Run a multiplex network test, and interpret any faults.
Check that the steering column and steering rack are in sound mechanical condition.
Repair if necessary.
Check that the front axle components, such as the track rod ends and shock absorber base plates, are in sound
mechanical condition.
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_ALP02/DAETRW_V08_ALP02/DAETRW_V06_ALP02/DAETRW_V0C_ALP02/
DAETRW_V12_ALP02
Page 48 of 56

POWER ASSISTED STEERING
Fault finding - Fault Finding Chart
36B
36B - 48V6 MR-366-X84-36B000$924_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ALP3 Poor vehicle handling
NOTESNone
Check using status ET026 Computer calibration that the computer configuration corresponds to the vehicle
equipment, wheel size, vehicle type and engine:
Configure the computer correctly using the diagnostic tool, if necessary (see SC001 Computer calibration).
Check the conformity of PR014 Assistance level available.
Check the condition and pressure of the tyres, the condition of the joints and the front axle geometry.
Check the vehicle battery voltage and the condition of the battery terminals.
Repair if necessary.
Check the condition and presence of the electric power steering supply fuse.
Repair if necessary.
Check the condition of the electric power steering black 2-track power connector.
If there is a repair procedure (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise change the wiring.
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_ALP03/DAETRW_V08_ALP03/DAETRW_V06_ALP03/DAETRW_V0C_ALP03/
DAETRW_V12_ALP03
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 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 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