2009 RENAULT TWINGO RS Chasiss - Power Assisted Steering Workshop Manual

36B-41
MR-413-X44-36B000$804.mif
V2
POWER – ASSISTED STEERING
Fault finding – Interpretation of parameters
EPAS
Vdiag No.: 04 - 08
36B
PR130
PR132
MOTOR POWER (45 A)
CURRENT SETPOINT (45 A)
NOTESNone.
Parameter PR130 Current setpoint (45 A) indicates the current setpoint (power) sent by the EPAS computer to
the steering motor according to the torque applied to the steering wheel. Parameter PR132 Motor power (45 A)
indicates the electric current actually consumed by the EPAS motor.
The value of parameter PR130 Current setpoint (45 A) must be approximately equal to the value of parameter
PR132 Motor power (45 A).
If the parameters are not the same, contact the Techline.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V04_PR130/DAE_V04_PR132/ DAE_V08_PR130/DAE_V08_PR132

36B-42
MR-413-X44-36B000$871.mif
V2
36B
POWER – ASSISTED STEERING
Fault finding – Customer complaints
NO DIALOGUE WITH THE COMPUTER ALP 1
POOR VEHICLE HANDLINGALP 2
SUDDEN LOSS OF ASSISTANCE ALP 3
GRADUAL LOSS OF ASSISTANCE CHART 4
INTERMITTENT ASSISTANCE ALP 5
ASSISTANCE RETURN ALP 6
PERMANENT ASSISTANCEALP 7
EXCESSIVE PERMANENT ASSISTANCE ALP 8
STEERING WHEEL VIBRATION OR PULSATING ALP 9
NO ASSISTANCE ON START-UP ALP 10
WARNING LIGHT ON WITH NO FAULT ALP 11
STEERING WHEEL NOT RETURNING TO CENTRE POINT ALP 12
EPAS
Vdiag No.: 04 - 08
MR-413-X44-36B000$871.mif

36B-43
MR-413-X44-36B000$938.mif
V2
36B
POWER – ASSISTED STEERING
Fault finding – Fault finding Chart
ALP 1 No dialogue with the computer
NOTESUse the Technical Note wiring diagram for New Twingo.
Try to establish dialogue with a computer on another vehicle to check that the diagnostic tool is not faulty.
If the tool is not faulty and no dialogue is established with any other computer of the same vehicle, check the
tightness and condition of the battery terminals (see 80A, Battery).
Check the charging circuit (see 16A, Starting - Charging).
With connector A of component 502 and the connector of components 1222 and 1094 disconnected, check the
continuity and insulation of connection HK between components 502 and 225.
If the connection(s) are faulty and there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the wiring, otherwise replace it.
If the checks reveal no faults, check the conformity of components 1022 and 1094.
Check the condition and the position of the 80 A fuse in the engine fuse and relay box.
Check the condition and the position of fuse F3 (15 A) in the passenger compartment fuse box.
With the ignition on and the engine stopped, check for a voltage equal to the battery voltage on connections BP81
and AP23 against earth ML.
Connectors of component 502 disconnected, check the condition and conformity of the connectors and clips.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
With the connectors of components 597 and 1016 disconnected:
Check the continuity and insulation of connection BP81 between components 502 and 597.
Check the continuity and insulation of connection AP23 between components 502 and 1016.
Check the continuity and insulation of connection ML of component 502.
If the connection(s) are faulty and there is a repair method (see Technical Note 6015A, Repairing electrical
wiring, W iring: Precautions for repair), repair the wiring, otherwise replace it.
If the checks reveal no faults, check the conformity of components 597 and 1016.
If the fault is still present, contact Techline.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V04_ALP1/ DAE_V08_ALP1
EPAS
Vdiag No.: 04 - 08
MR-413-X44-36B000$938.mif

36B-44
MR-413-X44-36B000$938.mif
V2
POWER – ASSISTED STEERING
Fault finding – Fault finding Chart
EPAS
Vdiag No.: 04 - 08
36B
ALP 2 CUSTOMER COMPLAINTS CONCERNING ASSISTANCE
NOTESOnly consult this customer complaint after a complete check with the
diagnostic tool.
Check that the steering column and steering rack are in sound mechanical condition.
Repair if necessary.
Check the pressure and condition of the tyres, the condition of the joints and the front axle geometry.
Check that the configuration reading LC002 Strategy number corresponds to the vehicle equipment.
Configure the computer correctly using the diagnostic tool, if necessary (see Configuration and Programming).
AFTER REPAIRPerform a check using the diagnostic tool.
DAE_V04_ALP2/ DAE_V08_ALP2

36B-45
MR-413-X44-36B000$938.mif
V2
POWER – ASSISTED STEERING
Fault finding – Fault finding Chart
EPAS
Vdiag No.: 04 - 08
36B
ALP 3 SUDDEN LOSS OF ASSISTANCE
NOTESOnly consult this customer complaint after a complete check with the
diagnostic tool.
Use the Technical Note wiring diagram for New Twingo.
Connectors of component 502 disconnected, check the condition and conformity of the connectors and clips.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
With the connector of component 597 disconnected:
Check the continuity and insulation of connection BP81 between components 502 and 597.
Check the continuity and insulation of connection ML of component 502.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
If the checks reveal no faults, perform a conformity check of component 597.
Check the pressure and condition of the tyres, the steering, joints and the front axle geometry.
If the fault is still present, contact Techline.
AFTER REPAIRPerform a check using the diagnostic tool.
DAE_V04_ALP3/ DAE_V08_ALP3

36B-46
MR-413-X44-36B000$938.mif
V2
POWER – ASSISTED STEERING
Fault finding – Fault finding Chart
EPAS
Vdiag No.: 04 - 08
36B
CHART 4 GRADUAL LOSS OF ASSISTANCE
NOTESOnly consult this customer complaint after a complete check with the
diagnostic tool.
Use the Technical Note wiring diagram for New Twingo.
Connectors of component 502 disconnected, check the condition and conformity of the connectors and clips.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
With the connector of component 1016 disconnected:
Check the continuity and insulation of connection AP23 between components 502 and 1016.
Check the continuity and insulation of connection ML of component 502.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
If the checks reveal no faults, perform a conformity check of component 1016.
Check the pressure and condition of the tyres, the condition of the joints and the front axle geometry.
If the fault is still present, contact Techline.
AFTER REPAIRPerform a check using the diagnostic tool.
DAE_V04_ALP4/ DAE_V08_ALP4

36B-47
MR-413-X44-36B000$938.mif
V2
POWER – ASSISTED STEERING
Fault finding – Fault finding Chart
EPAS
Vdiag No.: 04 - 08
36B
ALP 5 INTERMITTENT ASSISTANCE
NOTESOnly consult this customer complaint after a complete check with the
diagnostic tool.
Use the wiring diagram Technical Note for New Twingo.
Connectors of component 502 disconnected, check the condition and conformity of the connectors and clips.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
With the connector of component 1016 disconnected:
Check the continuity and insulation of connection AP23 between components 502 and 1016.
Check the continuity and insulation of connection ML of component 502.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
If the checks reveal no faults, perform a conformity check of component 1016.
If the fault is still present, contact Techline.
AFTER REPAIRPerform a check using the diagnostic tool.
DAE_V04_ALP5/ DAE_V08_ALP5

36B-48
MR-413-X44-36B000$938.mif
V2
POWER – ASSISTED STEERING
Fault finding – Fault finding Chart
EPAS
Vdiag No.: 04 - 08
36B
ALP 6 ASSISTANCE RETURN WHILE DRIVING
NOTESOnly address this customer complaint after a complete check with the
diagnostic tool.
Use the wiring diagram Technical Note for New Twingo.
Connectors of component 502 disconnected, check the condition and conformity of the connectors and clips.
If the connector is faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring: Precautions for
repair), repair the connector, otherwise replace the wiring.
With the connector of component 597 disconnected:
Check the continuity and insulation of connection BP81 between components 502 and 597.
Check the continuity and insulation of connection ML of component 502.
If the connection or connections are faulty (see Technical Note 6015A, Repairing electrical wiring, Wiring:
Precautions for repair), repair the wiring, otherwise replace it.
If the checks reveal no faults, perform a conformity check of component 597.
Check the pressure and condition of the tyres, the condition of the joints and the front axle geometry.
If the fault is still present, contact Techline.
AFTER REPAIRPerform a test using the diagnostic tool.
DAE_V04_ALP6/ DAE_V08_ALP6