RENAULT SCENIC 2006 J84 / 2.G Power Assisted Steering Service Manual

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

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

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

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

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

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

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

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

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

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