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

POWER ASSISTED STEERING
Fault finding - Introduction
36B
36B - 4V6 MR-366-X84-36B000$066_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
4. FAULT FINDING PROCEDURE
Check the battery charge and the
condition of the fuses
Print the system fault finding log
(available on CLIP or in the MR
or NT)
Connect CLIP
no
Dialogue with
computer?
yes
Read the faults
no
Faults
present
yes
Deal with present faults
Dealing with stored faults
no
The cause is
still presentFault
solved
yes
Refer to ALP No. 1
Conformity check
no
The cause is
still presentFault
solved
Use fault finding charts (ALPs)
no
The cause is
still presentFault
solved
Contact the Techline with the
completed fault finding log

POWER ASSISTED STEERING
Fault finding - Introduction
36B
36B - 6V6 MR-366-X84-36B000$066_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
5. FAULT FINDING LOG
You will always be asked for this log:
–when requesting technical assistance from Techline,
–for approval requests when replacing parts for which approval is mandatory,
–to be attached to monitored parts for which reimbursement is requested. The log is needed for warranty
reimbursement, and enables better analysis of the parts removed.
6. SAFETY ADVICE
Safety rules must be observed during any work on a component to prevent any damage or injury:
–check the battery voltage to avoid incorrect operation of computer functions,
–Use the proper tools. IMPORTANTIMPORTANT
Any fault on a complex system requires thorough fault finding with the appropriate tools. The
FAULT FINDING LOG, which should be completed during the procedure, enables you to keep
track of the procedure which is carried out. It is an essential document when consulting the
manufacturer.
IT IS THEREFORE MANDATORY TO FILL OUT A FAULT FINDING LOG FOR EACH FAULT
FINDING PROCEDURE.

POWER ASSISTED STEERING
Fault finding - System operation
36B
36B - 8V6 MR-366-X84-36B000$132_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
SYSTEM OPERATION
On this vehicle, the steering system is power-assisted by an electric motor (mounted on the steering column). The
driver's actions are translated by a torque sensor, which measures the force applied to the steering wheel by the
driver, and by an angle measuring sensor. The steering wheel angle signal is used by the electronic stability program
computer for the trajectory control programming.
Assistance is provided by means of an electric motor which applies an appropriate torque to the steering column, in
one direction or the other.
A computer controls this assistance according to several vehicle environment parameters, including the vehicle
speed.
NOTE
Depending on the operating conditions and the operations performed on the vehicle before switching on the ignition,
the assistance system may take a certain time to be activated after engine starting; this also applies after battery cut-
off or switching off the ignition.
Fault finding warning lights illumination programming:
Slow flashing of the Service warning light at 2 Hz: the electric power steering system is in fault finding mode.
Rapid flashing of the Service warning light at 8 Hz accompanied by the Check steering message: the steering
wheel angle sensor is not calibrated and not indexed.
Service warning light continuously lit with Check steering displayed on instrument panel: signal received by the
EPAS computer.
–assistance equal to that provided at a speed of 24 mph (40 km/h) if vehicle speed signal is absent or incorrect,
–angle sensor signal invalid: steering wheel angle sensor not calibrated (no active recall).
STOP warning light continuously lit with steering defective displayed on the instrument panel: fault in the EPAS
system.
If the fault is still present after repair, contact the Techline.
Angle sensor programming (initialisation)
The steering wheel angle sensor is initialised after the ignition is switched on. The sensor is not initialised until the
steering wheel has gone through a quarter turn left or right. If this turn is not carried out, the steering wheel angle
value reading will be 1.2 degrees higher or lower than the actual value.
Check consistency of ET020 Steering wheel angle sensor programming. Note:
If the computer detects a fault, the level of assistance can be modified depending on how serious the fault is.
An incorrect or absent vehicle speed signal results in fixed, unsatisfactory assistance.

POWER ASSISTED STEERING
Fault finding - Replacement of components36B
36B - 10V6 MR-366-X84-36B000$264_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12POWER ASSISTED STEERING
Fault finding - Replacement of components
The power-assisted steering computer cannot be separated from the steering column.
Before replacing the electric power assisted steering computer, the battery must be disconnected.
Procedure to follow after battery disconnection:
Every time the battery is disconnected, the steering wheel angle is invalid (remains at 0) and status ET020 is at
Status 3.
Following a road test, this will result in a fault in the Electronic Stability Program.
Therefore, every time the battery is disconnected, turn the steering wheel from lock to lock, then bring back the
steering wheel to the centre point with the wheels set straight ahead and the engine running.
Check that ET020 Steering wheel angle sensor programming becomes Status 4.
If the fault is still present, stop and restart the engine without pressing the ESP button and repeat the procedure
above.
Replacing the computer:
Each time the Electric Power Assisted Steering computer is replaced, configure the computer to the vehicle (see
SC001 Computer calibration) and program the steering wheel angle sensor (VP004 Steering wheel angle sensor
programming).
The computer must only be replaced with the battery disconnected.
MR-366-X84-36B000$264_eng.mif

POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 15V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12POWER ASSISTED STEERING
Fault finding - Interpretation of faults
DF002
PRESENT
OR
STOREDCOMPUTER
DEF : Computer fault
WARNING
Consult the fault contexts.
If PR143 Internal fault codes = 46 and the battery voltage when the fault occurs (PR108) is above 9 V, do not
clear the fault; contact the Techline.
If PR143 Internal fault code = 46 and the battery voltage when the fault occurs (PR108) is less than or equal to
9 V, run fault finding on the battery and charge circuit and clear the fault.
For other values of PR143, do not clear the fault, contact the Techline.
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after starting or a steering wheel movement from full lock
to full lock.
–Check the condition and connection of the battery terminals.
–Check that the EPAS black 2-track connector is correctly locked.
–Check that the EPAS black 8-track connector is correctly locked.
–Check the condition and conformity of the EPAS fuses: on the power fuse board (70A) and on the UPC (5A).
–Check the conformity of PR108 Computer feed voltage: 12 V < PR108 < 16 V.
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.
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_DF002/DAETRW_V08_DF002/DAETRW_V06_DF002/DAETRW_V0C_DF002/
DAETRW_V12_DF002
MR-366-X84-36B000$462_eng.mif

POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 16V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF020
PRESENT
OR
STOREDCOMPUTER SUPPLY VOLTAGE
DEF : Computer internal voltage
NOTESSpecial notes:
Although stored in the computer, this fault is not caused by an electric power-assisted
steering failure, but by a poor electrical supply.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after the engine is started or a steering wheel movement
from full lock to full lock.
–Check the condition and connection of the battery terminals.
–Check that the EPAS black 2-track connector is correctly locked.
–Check that the EPAS black 8-track connector is correctly locked.
–Check the condition and conformity of the EPAS fuses: on the power fuse board (70A) and on the UPC (5A).
–Check the conformity of PR108 Computer feed voltage: 12 V < PR108 < 16 V.
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 voltage of the battery and the charge circuit.
Repair if necessary.
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_DF020/DAETRW_V08_DF020/DAETRW_V06_DF020/DAETRW_V0C_DF020/
DAETRW_V12_DF020

POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 18V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF035
PRESENT
OR
STOREDVARIABLE POWER ASSISTED STEERING MOTOR
DEF : Internal electronic fault
WARNING
For TRW EPAS Vdiag 04 only, consult the fault contexts.
–If PR143 Internal fault code = 58 and if the battery voltage when the fault occurs (PR108) is above 9 V, do not
clear the fault; contact the Techline.
–If PR143 Internal fault code = 58 and if the battery voltage when the fault occurs (PR108) is less than or equal
to 9 V, run fault finding on the battery and charge circuit.
–For other values of PR143, do not clear the fault, contact the Techline.
For the other Vdiag of TRW EPAS, do not clear the fault, contact the Techline.
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after starting or a steering wheel movement from full lock
to full lock.
Special notes:
Apply the fault finding procedure only on Vdiag 04.
For Vdiag 06, 08, 0C and 12, do not clear the fault and contact the Techline.
–Check the condition and connection of the battery terminals.
–Check that the EPAS black 2-track connector is correctly locked.
–Check that the EPAS black 8-track connector is correctly locked.
–Check the condition and conformity of the EPAS fuses: on the power fuse board (70A) and on the UPC (5A).
–Check the conformity of PR108 Computer feed voltage: 12 V < PR108 < 16 V.
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.
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_DF035/DAETRW_V08_DF035/DAETRW_V06_DF035/DAETRW_V0C_DF035/
DAETRW_V12_DF035

POWER ASSISTED STEERING
Fault finding - Interpretation of faults
36B
36B - 22V6 MR-366-X84-36B000$462_eng.mif
PAS
Vdiag No.: 04, 06, 08, 0C
and 12
DF055
PRESENT
OR
STOREDCOMPUTER MEMORY
DEF : EEPROM irregularity
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after the battery is disconnected.
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.
Configure the computer using command SC001 Computer calibration, in line with the equipment and vehicle
type.
If the fault is still present, without customer complaints, the EPAS is secure.
If the fault is still present and the assistance level is severely reduced, contact the Techline.
AFTER REPAIRCarry out a road test followed by a complete test with the diagnostic tool.
DAETRW_V04_DF055/DAETRW_V08_DF055/DAETRW_V06_DF055/DAETRW_V0C_DF055/
DAETRW_V12_DF055

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.

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