2007 RENAULT SCENIC Power Assisted Steering Workshop Manual

POWER-ASSISTED STEERING
Fault finding – Fault Finding Chart
36B
36B-49V5 MR-372-J84-36B000$924_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
ALP2 Loss of vehicle assistance without warning
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
The vehicle is no longer assisted if the Electric Power Steering fuse is damaged or supply is lost. The steering is
equivalent to manual steering, manoeuvrable when driving even at low speeds, but very difficult to manoeuvre
when stopped.
Since it is no longer being supplied, the EPAS computer is not capable of lighting the warning light, but the
instrument panel lights the STOP warning light + Message 4 seconds after the loss of the feed causing the loss
of assistance.
The driver will only become aware of the fault through noticing the loss of assistance at the steering wheel.
Check the fuses for the electric power-assisted steering:
Power fuse 80A BP81 in the engine fuse box.
5A AP44 + after ignition fuse on the UPC.
Check the condition of the electric power-assisted steering connectors and repair if necessary.
Check that the electrical feeds to the computer are correct:
2-track connector track 2vehicle earth
2-track connector track 1+ battery feed
8-track connector track 8+ after ignition feed
Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the connections between the electric
power-assisted steering computer and the instrument panel.
8-track connector track 6 track 30 of the instrument panel
8-track connector track 4 track 29 of the instrument panel
Check that the steering column and steering rack are in sound mechanical condition.
Repair if necessary.
Make sure 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 REPAIRPerform a test using the diagnostic tool.
DAE_V05_ALP2/DAE_V09_ALP2/DAE_V0D_ALP2

POWER-ASSISTED STEERING
Fault finding – Fault Finding Chart
36B
36B-50V5 MR-372-J84-36B000$924_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
ALP3 Poor vehicle handling
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check the pressure and condition 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 status and presence of the Electric Power Steering system power supply fuse.
Repair if necessary.
Check the insulation, continuity and absence of interference resistance on the wiring harness between the
battery and the 2-track EPAS connector.
Repair if necessary.
Check that status ET026 Computer calibration corresponds to the vehicle equipment.
Configure the computer correctly using the diagnostic tool, if necessary (see Configuration and Programming).
If the fault is still present, contact the Techline.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V05_ALP3/DAE_V09_ALP3/DAE_V0D_ALP3

POWER-ASSISTED STEERING
Fault finding – Fault Finding Chart
36B
36B-51V5 MR-372-J84-36B000$924_fra.mif
EPAS
Vdiag No.: 05, 09
ALP4The steering wheel does not return by itself to the centre at low
speed: steering wheel return to centre point inactive
NOTESOnly consult this customer complaint after a complete check with the diagnostic tool.
Check that the casing under the steering wheel does not rub on the steering column or steering wheel.
Check the pressure and condition of the tyres, the condition of the joints and the front axle geometry.
Check the vehicle battery voltage.
Check the charge circuit if necessary.
Refer to 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).
Refer to parameters PR121 Steering wheel angle which must be in the range - 10 d˚ < X < 10 d˚ and PR007
Steering wheel angle offset compensation which must be in the range - 10 d˚ < X < 10 d˚.
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".
If parameters PR121, PR007 and status ET020 listed above are not in conformity:
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 REPAIRPerform a test using the diagnostic tool.
DAE_V05_ALP4/DAE_V09_ALP4

POWER-ASSISTED STEERING
Fault finding – Fault Finding Chart
36B
36B-52V5 MR-372-J84-36B000$924_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
ALP5Under-assistance at low speed and over-assistance at high
speed without warning
NOTESNone.
Check the vehicle battery voltage.
Check the charge circuit if necessary.
Check that parameter PR003 Vehicle speed is correct (see Conformity check).
Test the multiplex network.
Repair if necessary.
If the fault is still present, contact Techline.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V05_ALP5/DAE_V09_ALP5/DAE_V0D_ALP5

POWER-ASSISTED STEERING
Fault finding – Fault Finding Chart
36B
36B-53V5 MR-372-J84-36B000$924_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
ALP6 Too little assistance
NOTESNote :
With the steering wheel on full lock, assistance is reduced after 0.5 seconds.
Check the pressure and condition of the tyres, the condition of the joints and the front axle geometry.
Check the vehicle battery voltage.
Check the charge circuit if necessary.
Do not operate the EPAS for at least 1 hour.
Check that parameters PR008 Computer temperature, PR009 Steering motor temperature and PR014
Assistance level available are correct (see Conformity check).
Make sure that no component located in the vicinity of the electric power-assisted steering system causes an
abnormal temperature rise in the system.
If the fault is still present, contact the Techline.
Note:
After the steering system has been heated a number of times, the EPAS limits assistance itself to protect its
electrical components.
It is normal for the system to do this.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V05_ALP6/DAE_V09_ALP6/DAE_V0D_ALP6

POWER-ASSISTED STEERING
Fault finding – Fault Finding Chart
36B
36B-54V5 MR-372-J84-36B000$924_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
ALP7 Assistance available for 5 minutes after switching off the ignition
NOTESNote :
This fault may arise if the vehicle speed multiplex signal is faulty or if the ignition is
switched off before the vehicle has come to a complete halt.
Check the vehicle battery voltage.
Check the charge circuit if necessary.
Check that parameter PR003 Vehicle speed is correct (see Conformity check).
Run a multiplex network test (see 88B, Multiplex).
Repair if necessary.
Carry out fault finding on the injection system (see 13B, Diesel injection and 17B, Petrol injection).
Repair if necessary.
Check the fuses for the electric power-assisted steering:
5A AP44 + after ignition fuse on the Protection and Switching Unit.
Repair if necessary.
Check the conformity of the + 12 after ignition feed for the computer:
Electric Power Assisted Steering Computer Connector:
8-track connector track 8+ After ignition
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V05_ALP7/DAE_V09_ALP7/DAE_V0D_ALP7

POWER-ASSISTED STEERING
Fault finding – Fault Finding Chart
36B
36B-55V5 MR-372-J84-36B000$924_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
ALP8Assistance available but Check Steering warning message
displayed and Service indicator light continuously lit
NOTESNone.
Check the vehicle battery voltage and the condition of the electric power-assisted steering connector.
Repair and check the charge circuit if necessary.
Vdiag 05 and 09: Check status ET020 Steering wheel angle programming which should be STATUS 4. If not,
program the steering wheel angle sensor VP004 Steering wheel angle programming (see Configuration and
programming).
If the fault is still present, contact the Techline.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V05_ALP8/DAE_V09_ALP8/DAE_V0D_ALP8

POWER-ASSISTED STEERING
Fault finding – Fault Finding Chart
36B
36B-56V5 MR-372-J84-36B000$924_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
ALP9 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 pressure and condition of the tyres, the condition of the joints and the front axle geometry.
Repair if necessary.
Vdiag 05 and 09:
Refer to 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).
Refer to parameters PR121 Steering wheel angle which must be in the range - 10 d˚ < X < 10 d˚ and PR007
Steering wheel angle offset compensation which must be in the range - 10 d˚ < X < 10 d˚.
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 parameters PR121, PR007 and status ET020 listed above are not in conformity:
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 REPAIRPerform a test using the diagnostic tool.
DAE_V05_ALP9/DAE_V09_ALP9/DAE_V0D_ALP9