ESP RENAULT SCENIC 2007 J84 / 2.G Power Assisted Steering Workshop Manual

POWER-ASSISTED STEERING
Fault finding – Introduction
36B
36B-3V5 MR-372-J84-36B000$066_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
Faults
Faults are declared present or stored (depending on whether they appeared in a certain context and have
disappeared since, or whether they remain present but are not diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is switched on
after the + after ignition feed (without any system components being active).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with
the fault.
If the fault is not confirmed, check:
–the electrical lines which correspond to the fault,
–the connectors for these lines (for oxidation, bent pins, etc.),
–the resistance of the component detected as defective,
–the condition of the wires (melted or split insulation, wear).
Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool because the
data is inconsistent. Therefore, this stage is used to:
–carry out fault finding on faults that do not have a fault display, and which may correspond to a customer complaint.
–check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the
corresponding fault finding page.
Customer complaints - Fault finding chart
If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be processed by
customer complaints.
A synopsis of the general procedure to follow is provided on the following page in the form of a flow chart.

POWER-ASSISTED STEERING
Fault finding – Introduction
36B
36B-5V5 MR-372-J84-36B000$066_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
FAULT FINDING PROCEDURE (continued)
Wiring check
Fault finding problems
Disconnecting the connectors and/or manipulating the wiring harness may temporarily remove the cause of a fault.
Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not
present when the analysis is made (stored fault).
Visual inspection
Look for damage under the bonnet and in the passenger compartment.
Carefully check the fuses, insulators and wiring harness routing.
Look for signs of oxidation.
Physical inspection
While manipulating the wiring harness, use the diagnostic tool to note any change in fault status from stored
to present.
Make sure that the connectors are properly locked.
Apply light pressure to the connectors.
Twist the wiring harness.
If there is a change in status, try to locate the source of the fault.
Inspection of each component
Disconnect the connectors and check the appearance of the clips and tabs, as well as the crimping (no crimping on
the insulating section).
Make sure that the clips and tabs are properly locked in the sockets.
Check that no clips or tabs have been dislodged during connection.
Check the clip contact pressure using an appropriate model of tab.
Resistance check
Check the continuity of entire lines, then section by section.
Look for a short circuit to earth, to + 12 V or to another wire.
If a fault is detected, repair or replace the wiring harness.

POWER-ASSISTED STEERING
Fault finding – System operation
36B
36B-7V5 MR-372-J84-36B000$132_fra.mif
EPAS
Vdiag no.: 05, 09,
0DPOWER-ASSISTED STEERING
Fault finding – System operation
GENERAL OPERATION
On this vehicle, the steering system is power-assisted by an electric motor attached to the steering column.
The action of the driver is relayed by a torque sensor, which measures the force applied to the steering wheel,
and a steering column angle sensor (steering wheel angle sensor only on Vdiag 05 and 09). Assistance is given
by an electric motor which applies more or less 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.
EPAS ALSO OFFERS THE FOLLOWING:
Active recall:
This function is used to bring the steering wheel back to the straight-ahead position when driving at low speeds but
not when the vehicle is stationary. This function is normal on hydraulic power-assisted steering vehicles or vehicles
without assistance.
This function cannot be deactivated by the diagnostic tool.
For Vdiag 05 and 09 (columns with steering wheel angle sensor): this feature is inactive when the steering wheel
angle is not available (ET020 Programming steering wheel angle sensor for STATUS 1, STATUS 2, STATUS 3).
For Vdiag 0D (columns without steering wheel angle sensor): this feature is always inactive.
Lock torque limit:
This function limits the assistance torque when the steering wheel is held at full lock with considerable effort, when
the vehicle is stationary or travelling at a speed less than 3 mph (5 km/h). The purpose of this function is to limit
overheating of the electric power assisted steering motor.
Note:
When 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 assistance equal to that provided at 60 mph (100 km/h)
without active recall. The EPAS sends a steering wheel angle signal to the ESP computer (if fitted).
MR-372-J84-36B000$132_fra.mif

POWER-ASSISTED STEERING
36B
36B-11V5 MR-372-J84-36B000$330_fra.mif
EPAS
Vdiag no.: 05, 09,
0DPOWER-ASSISTED STEERING
Fault finding – Configurations and programming
Summary table of configurations and configuration readings
GENERAL INSTRUCTIONS:
After replacing the EPAS computer/steering column unit, configure the computer's assistance strategy and program
the steering wheel angle sensor (only for Vdiag 05 and 09).
The following procedure must be followed in order to carry out the above configuration and programming:
–connect the diagnostic tool,
–switch on the ignition and establish dialogue with the electric power-assisted steering computer,
–select the "Repair mode" menu,
–configure the computer's assistance strategy and program the steering wheel angle sensor (see below),
–exit fault finding mode: stop dialogue with the electric power assisted steering computer without switching off the
CLIP tool,
–switch off the ignition for at least 15 seconds, without disconnecting the battery, for the configuration to be taken
into account by the EPAS computer,
–switch on the ignition again and establish dialogue with the electric power assisted steering computer,
–make sure the configuration readings have been properly registered,
–check that the system is operating correctly (steering assistance available when the engine is running).
A. STEERING WHEEL ANGLE SENSOR PROGRAMMING (only for Vdiag 05 and 09)
PROCEDURE COMPLETE:
(following replacement of the computer/steering column assembly).
Status ET020 Steering wheel angle sensor programming is STATUS 1 (SERVICE indicator light is continuously
lit, see interpretation of status).
–with the ignition on, connect the diagnostic tool and establish dialogue with the electric power assisted steering
computer,
–with the engine stopped or running (to obtain maximum steering assistance), turn the steering wheel to full left lock
and then to full right lock,
–set the vehicle wheels straight ahead, with the steering at the centre point (driving in a straight line),
–run command VP004 Steering wheel angle sensor programming by pressing the CONFIRM button,
–turn the steering wheel to full left lock and then to full right lock,
–Status ET020 Steering wheel angle sensor programming must be STATUS 4 (normal operational status),
–check that parameter PR121 Steering wheel angle varies within the limits indicated in the Conformity check
section and that DF038 Angle sensor is not present. VP001 Enter VIN ID010 VIN code
VP004Steering wheel angle sensor programming
(only for Vdiag 05 and 09)ET020Steering wheel angle sensor programming
(only for Vdiag 05 and 09)
VP005 Enter the APV* operation date ID018 Read last APV* operation date
SC001 Computer calibration ET026 Computer calibration
Note:
To obtain a precise wheels straight ahead position (straight line driving), carry out this operation on a front axle
adjustment bench (especially for vehicles fitted with ESP).
IMPORTANT
If the vehicle is fitted with ESP, establish dialogue with the ABS/ESP computer after the operation; if the function
is available (depending on the computer version) clear the ESP sensor programming using command RZ003.
Make sure there are no ESP faults: carry out the necessary operations by referring to the Fault Finding Manual.
MR-372-J84-36B000$330_fra.mif

POWER-ASSISTED STEERING
36B
36B-12V5 MR-372-J84-36B000$330_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
STARTING WITH WHEELS TURNED (OUTSIDE RANGE ± 120˚) (only for Vdiag 05 and 09)
When starting the engine with the wheels fully locked (outside range ± 120˚), status ET020 Steering wheel angle
sensor programming is STATUS 3. No fault is indicated by the EPAS or ESP and no indicator light comes on, as
this is a basic operation of the system.
In order for status ET020 to be STATUS 4 turn the wheels so that they are straight (normal operating range).
B. CONFIGURING THE STEERING ASSISTANCE STRATEGY
This configuration enables the computer's assistance strategy to be calibrated depending on the vehicle type, engine
type, gearbox type and tyre sizes.
–with the ignition on, connect the diagnostic tool and establish dialogue with the electric power assisted steering
computer,
–run command SC001 Computer calibration by pressing the CONFIRM button,
–enter the criteria corresponding to the vehicle,
–check, using status ET026 Computer calibration, that the criteria that have been entered correspond
to the vehicle.

POWER-ASSISTED STEERING
36B
36B-13V5 MR-372-J84-36B000$396_fra.mif
EPAS
Vdiag no.: 05, 09,
0DPOWER-ASSISTED STEERING
Fault finding – Fault summary table
Tool
faultDiagnostic tool titleAssociated
DTCCustomer complaints and warning light
coming on
DF001Motor thermal protection5614Steering assistance intermittent reduction.
DF002Computer5608Assistance limited to 30% (with SERVICE
warning light + message) or no assistance
(with STOP warning light + message)
depending on the internal fault code.
DF020Computer supply5601Degraded assistance (no warning light or
message) until a loss of assistance below
9 V or above 17 V with STOP indicator light
+ Message.
DF021Steering wheel angle sensor
programming (only for Vdiag 05 and 09)5612Degraded steering wheel recall (with
SERVICE indicator light + message). ESP
fault, if present.
DF023+ after ignition feed5613Assistance gradually cuts out (within
5 minutes). When the ignition is next
switched on there is no steering
assistance.
DF033Multiplex networkD000Inappropriate level of assistance:
SERVICE indicator light + Message.
DF035Variable power assisted steering motor5606Assistance limited to 30% (with SERVICE
warning light + message) or no steering
assistance (with STOP warning light
+ Message).
DF038Angle sensor (only Vdiag 05 and 09) 5605Steering wheel recall degraded
(no warning light or message). ESP fault,
if present.
DF053Computer configuration5602Defect mode assistance (no message
or warning light).
DF054Torque sensor5604Steering assistance loss or absence with
STOP indicator light + Message.
DF055Computer memory5607Degraded assistance (without warning
light or message) or assistance limited to
10% with SERVICE warning light
+ Message.
Risk of ESP fault.
DF057Vehicle speed multiplex signalD200Inappropriate level of assistance:
SERVICE indicator light + Message.
Note:
Warning light/message
SERVICE + "Check steering" or,
STOP + audible warning + "Faulty steering" or "EPAS fault", depending on the type of instrument panel.
MR-372-J84-36B000$396_fra.mif

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-14V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0DPOWER-ASSISTED STEERING
Fault finding – Interpretation of faults
DF001
PRESENT
OR
STOREDMOTOR THERMAL PROTECTION
NOTESPriority in the event of a number of faults:
Deal with fault DF020 "Computer supply voltage" first, whether it is present
or stored.
Conditions for applying the fault finding procedure to stored faults:
Apply this fault finding procedure even if the fault is stored.
Notes:
This fault does not indicate a system failure, but indicates either overheating of the
Electric Power-Assisted Steering (EPAS) motor (160˚C) or of the computer (100˚C)
during repeated manoeuvres.
This fault can occur following repeated actions on the steering wheel (parking) and
causes a reduction in the steering assistance.
Check the conformity of the battery voltage and carry out fault finding on the charge circuit if necessary.
Remove the underside of the dashboard in order to gain access to the EPAS.
Ensure (carefully) that the EPAS is not still hot.
If the EPAS is still hot, let it cool for an hour before working on it.
Make sure that nothing in the EPAS environment can cause overheating (presence of components under the
dashboard, etc.).
Repair if necessary.
After leaving the EPAS to cool (PR008 Computer temperature and PR009 Steering motor temperature less
than 30˚C), clear the fault, start the engine and check that the EPAS is operating correctly by repeatedly carrying
out parking manoeuvres (turn the wheel slowly from the right-hand to left-hand lock positions).
Check that PR014 Level of assistance available = 100%.
If the fault is present once more or is stored after just a few manoeuvres, contact Techline.
AFTER REPAIRClear the stored faults.
Check that the EPAS is working.
Deal with any other faults.
DAE_V05_DF001/DAE_V09_DF001/DAE_V0D_DF001
MR-372-J84-36B000$462_fra.mif

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-15V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
DF002
PRESENT
OR
STOREDCOMPUTER
DEF: Computer fault
NOTESPriority in the event of a number of faults:
In the event of an accumulation of faults, deal with the other present and stored faults
before applying the interpretation for this fault.
Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after having started the engine and turned the steering
wheel from lock to lock.
Notes:
–This fault causes an absence of steering assistance or a loss of steering assistance
and also illuminates the STOP indicator light + Message or assistance is limited to
30% and the SERVICE indicator light + Message come on.
Disconnect the 2 black connectors from the EPAS computer.
Check the condition and conformity of the connectors and their clips.
Check the conformity of the electrical supplies (they must be equal to the battery voltage).
In the event of a fault, check the insulation, continuity and the absence of interference resistance on the
following connections:
8-track connector track 8 + 12 V after ignition
2-track connector track 1 + 12 V before ignition feed
2-track connector track 2 Earth
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRClear the stored faults.
Check that the EPAS is working.
Deal with any other faults.
DAE_V05_DF002/DAE_V09_DF002/DAE_V0D_DF002

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-24V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
DF053
PRESENT
COMPUTER CONFIGURATION
DEF: Computer calibration not carried out
NOTESPriority in the event of a number of faults:
Deal with fault DF020 Computer supply voltage first, if it is present or stored.
Notes:
This fault is present for as long as the computer assistance strategy is not configured.
It is automatically cleared after configuration.
This fault causes:
Degraded assistance (no message or warning light).
Check that the computer's configuration correctly corresponds to the vehicle type, engine type, gearbox and tyres
fitted on the vehicle.
Reconfigure the computer if necessary (see Configuration and programming).
If the fault is still present, contact the Techline.
AFTER REPAIRClear the stored faults.
Check that the EPAS is working.
Deal with any other faults.
DAE_V05_DF053P/DAE_V09_DF053P/DAE_V0D_DF053P

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-26V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
DF055
PRESENT
OR
STOREDCOMPUTER MEMORY
DEF: EEPROM irregularity
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after having started the engine and turned the steering
wheel from lock to lock, then returning it to the centre.
Notes:
This fault leads to degraded assistance with no warning light or message or an
assistance that is limited to 10% with the SERVICE indicator light + Message.
–Risk of ESP fault.
–The computer records an occurrence context (computer operating values frozen
when fault occurs). To view this information, click on the fault description (camera
symbol). Within these values, parameter PR143 Internal fault code gives the fault
finding procedure to apply.
Procedure to apply for internal fault codes 83 and 85 of PR143.
Only for 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 after the ignition has been switched on several times, contact the Techline.
Procedure to apply for internal fault codes 84 and 86 of PR143.
Contact Techline.
AFTER REPAIRClear the stored faults.
Check that the EPAS is working.
Deal with any other faults.
DAE_V05_DF055/DAE_V09_DF055/DAE_V0D_DF055