Page 35 of 56
POWER ASSISTED STEERING
Fault finding - Interpretation of statuses
36B
36B - 35V6 MR-366-X84-36B000$660_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
ET020
CONTINUED
STATUS 1 OR STATUS 2
If the status is STATUS 1 or STATUS 2, program the steering wheel angle sensor (see Configurations and
programming).
STATUS 3
If the status is STATUS 3, turn the steering wheel to right full lock, and then left full lock; then slowly return to the
centre point and go slightly beyond.
Status ET020 should become STATUS 4.
Note:
A present or stored fault can impede STATUS 4 (make the necessary repairs, consulting the fault finding manual).
After the battery is disconnected, status ET020 is STATUS 3 and PR121 Steering wheel angle remains 0.
Consult the Replacement of components section for the procedure to follow after disconnecting the battery.
AFTER REPAIRRun a system fault check.
Repeat the conformity check.
Page 38 of 56
POWER ASSISTED STEERING
36B
36B - 38V6 MR-366-X84-36B000$726_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12POWER ASSISTED STEERING
Fault finding - Parameter summary table
Tool parameter Diagnostic tool title
PR001Torque applied to the steering wheel
PR003Vehicle speed
PR006Steering motor torque setpoint
PR012Current absorbed by the motor
PR013Setpoint for current absorbed by the motor
PR014Level of assistance available
PR108Computer feed voltage
PR119Motor thermal protection indicator
PR121Steering wheel angle
MR-366-X84-36B000$726_eng.mif
Page 40 of 56
POWER ASSISTED STEERING
Fault finding - Parameter interpretation
36B
36B - 40V6 MR-366-X84-36B000$792_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
PR012
CURRENT ABSORBED BY THE MOTOR
NOTESNone
Parameter PR013 indicates the stipulated current setpoint for the steering motor.
This current depends:
–on the vehicle speed,
–on the torque applied to the steering wheel.
Parameter PR012 indicates the current actually consumed by the steering motor.
The value of parameter PR013 Setpoint for current absorbed by motor should be almost equal to the value of
parameter PR012 Current absorbed by motor.
If the parameters do not match the values indicated in the Conformity check, consult the interpretation of fault
DF035 Variable power assisted steering motor.
AFTER REPAIRCarry out a road test, followed by a check with the diagnostic tool.
DAETRW_V04_PR012/DAETRW_V08_PR012/DAETRW_V06_PR012/DAETRW_V0C_PR012 /
DAETRW_V12_PR012
Page 41 of 56
POWER ASSISTED STEERING
Fault finding - Parameter interpretation
36B
36B - 41V6 MR-366-X84-36B000$792_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
PR013
SETPOINT FOR CURRENT ABSORBED BY THE MOTOR
NOTESNone
Parameter PR013 indicates the stipulated current setpoint for the steering motor.
This current depends:
–on the vehicle speed,
–on the torque applied to the steering wheel.
Parameter PR012 indicates the current actually consumed by the steering motor.
The value of parameter PR013 Setpoint for current absorbed by motor should be almost equal to the value of
parameter PR012 Current absorbed by motor.
If the parameters do not match the values indicated in the Conformity check, consult the interpretation of fault
DF035 Variable power assisted steering motor.
AFTER REPAIRCarry out a road test, followed by a check with the diagnostic tool.
DAETRW_V04_PR013/DAETRW_V08_PR013/DAETRW_V06_PR013/DAETRW_V0C_PR013 /
DAETRW_V12_PR013
Page 43 of 56

POWER ASSISTED STEERING
Fault finding - Parameter interpretation
36B
36B - 43V6 MR-366-X84-36B000$792_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
PR119
MOTOR THERMAL PROTECTION INDICATOR
NOTESNone
The computer and assistance motor are both thermally protected. When the critical temperature is reached, the
power-assisted steering computer limits the assistance to 15 %.
This critical temperature may vary with the operation and forces applied to the steering column.
If the temperature exceeds 60 ˚C, do not operate the steering for 15 minutes, to allow the temperature to drop.
A search must be made to identify the cause of the temperature rise. It may arise from:
–an environment causing a temperature rise,
–abnormal use by the driver.
Note:
If the steering wheel is kept at full lock for over 5 seconds, the assistance will drop to 15 %, although the
temperature does not exceed 60˚.
AFTER REPAIRCarry out a road test, followed by a check with the diagnostic tool.
DAETRW_V04_PR119/DAETRW_V08_PR119/DAETRW_V06_PR119/ DAETRW_V0C_PR119/
DAETRW_V12_PR119
Page 44 of 56
POWER ASSISTED STEERING
Fault finding - Parameter interpretation
36B
36B - 44V6 MR-366-X84-36B000$792_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
PR121
STEERING WHEEL ANGLE
NOTESNone
The steering wheel angle, positive to the right or negative to the left, is the position of the steering wheel relative
to the zero value set when the steering wheel angle sensor is programmed.
If the parameter is not in line with the conformity check values (- 580˚ < X < 580˚), consult interpretation of faults
DF038 or DF059 Angle sensor.
Note:
If the angle remains 0˚:
–The steering wheel angle sensor has not been calibrated (status ET020 at status 1 or 2),
–the procedure to apply after disconnecting the battery was not observed,
–a fault is present. Deal with this fault.
AFTER REPAIRCarry out a road test, followed by a check with the diagnostic tool.
DAETRW_V04_PR121/DAETRW_V08_PR121/DAETRW_V06_PR121/DAETRW_V0C_PR121 /
DAETRW_V12_PR121
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 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