air condition 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 – 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-16V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
DF020
PRESENT
OR
STOREDCOMPUTER SUPPLY VOLTAGE
1.DEF: Voltage too low
2.DEF: Voltage too high
CO: Open circuit
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is considered present when the engine is running.
Notes:
This fault causes a degraded assistance (no warning light or message) until assistance
is lost (below 9 V or above 17 V) with STOP warning light + Message.
–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 code 135 of the PR143
Check the conditioning and positioning of the EPAS supply fuses:
–Power fuse (80A BP81) in the engine fuse box.
–AP44 after ignition fuse (5A) in the Protection and Switching Unit.
Check the condition and tightness of the battery and alternator terminals, as well as the Protection and Switching
Unit bolt.
Carry out fault finding on the charge circuit.
Repair if necessary.
Disconnect the two 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_DF020/DAE_V09_DF020/DAE_V0D_DF020

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-17V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
DF020
CONTINUED
Procedure to be applied for internal fault codes 147 and 148 of PR143.
The EPAS is not the reason for these internal fault codes. Check the condition of the battery and carry out fault
finding on the charge circuit.
AFTER REPAIRClear the stored faults.
Check that the EPAS is working.
Deal with any other faults.

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-19V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
DF023
PRESENT
OR
STORED+ AFTER IGNITION FEED
1.DEF: Abnormal voltage
NOTESNotes:
When this fault appears, the assistance gradually cut outs within 5 minutes.
Next time the ignition is switched on, this fault causes the absence of steering
assistance.
Check the power supply fuse for the EPAS:
–AP44 after ignition fuse (5A) in the Protection and Switching Unit.
Check the tightness and the condition of the battery terminals.
Repair if necessary.
Disconnect the 8-track connector of the EPAS computer.
Check the condition and conformity of the connector and its clips.
Check the conformity of the 12 V after ignition feed, with the ignition on and engine running (it 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 connection:
8-track connector track 8 + 12 V after ignition
Repair if necessary.
If the connections are OK but the EPAS computer electrical supply is not correct, run fault finding on the charge
circuit.
AFTER REPAIRClear the stored faults.
Check that the EPAS is working.
Deal with any other faults.
DAE_V05_DF023/DAE_V09_DF023/DAE_V0D_DF023

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-20V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
DF033
PRESENT
OR
STOREDMULTIPLEX NETWORK
DEF: CAN connection fault
NOTESConditions for applying the fault finding procedure to stored faults:
Apply this fault finding procedure.
Priority in the event of a number of faults:
Apply the interpretation of faults DF020 Computer supply and DF023 + after ignition
supply first, if they are present or stored.
Notes:
This fault may cause a reduction in steering assistance with the SERVICE indicator
light + Message.
Run fault finding on the multiplex network.
Carry out the necessary repairs.
Disconnect the 8-track connector from the EPAS computer.
Check the condition and conformity of the connector and its clips (terminals).
Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connections:
8-track connector of the EPAS computer
track 5 UCH
track 7 UCH
track 4 Instrument panel
track 6 Instrument panel
(see wiring diagram)
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_DF033/DAE_V09_DF033/DAE_V0D_DF033

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-21V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09,
0D
DF035
PRESENT
OR
STOREDVARIABLE POWER ASSISTED STEERING MOTOR
DEF: Internal electronic fault
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.
Notes:
This fault causes a loss of assistance or an absence of steering assistance and also
illuminates the STOP warning light + Message, or assistance is limited to 30% and
the SERVICE indicator light + Message come on.
–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 3, 33, 34, 35, 50, 51, 112, 113, 128, 145 of PR143.
Contact Techline.
Procedure to apply for internal fault codes 4, 5, 100, 114, 115, 129, 130 and 131 of PR143.
Check the condition of the wiring inside the EPAS and make sure that the 3 white EPAS connectors are correctly
locked.
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_DF035/DAE_V09_DF035/DAE_V0D_DF035

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-22V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09
DF038
PRESENT
OR
STOREDANGLE SENSOR
1.DEF: Sensor internal electrical fault
2.DEF: Absence of sensor signal
3.DEF: Values outside limits
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.
Notes:
This fault causes an absence of steering wheel return (no warning light or message).
–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 195 and 196 of PR143.
Position the vehicle wheels in the straight line driving position (steering centre point).
Refer to parameters PR121 Steering wheel angle and PR007 Steering wheel angle offset compensation.
Both parameters must be between - 10˚ < X < 10˚.
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".
Refer to status ET020 Steering wheel angle sensor programming, which must be STATUS 4.
If parameters PR121, PR007 and status ET020 are not correct:
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 via command VP004 Steering wheel angle sensor programming (see
Configuration and programming, section A).
Remove the fault, start the engine and check that the EPAS functions correctly by turning the steering wheel from
lock to lock (parking manoeuvres).
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_DF038/DAE_V09_DF038

POWER-ASSISTED STEERING
Fault finding – Interpretation of faults
36B
36B-23V5 MR-372-J84-36B000$462_fra.mif
EPAS
Vdiag no.: 05, 09
DF038
CONTINUED
Procedure to apply for internal fault codes 192, 193 and 194 of PR143.
Check the fault occurrence context for internal fault codes 193 and 194. If PR108 Computer supply voltage
is less than 10 V, the fault is due to a battery undervoltage.
Check the vehicle battery voltage.
Check the tightness and the condition of the battery terminals.
Check the charge circuit if necessary.
Check the condition of the 3 white EPAS connectors and check that they are locked correctly.
In the event of a fault, check the insulation, continuity and the absence of interference resistance on the
following connection:
2-track connector track 1 + 12 V before ignition feed
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.