Fault interpretation
| DF002 PRESENT OR STORED | CONTROL UNIT DEF: ECU fault |
In the stored contexts of DF002, if PR143 equals 105, 65 or 110 (decimal), contact your Techline.
This fault, together with any of these values, is irreversible.
INSTRUCTIONS
Handling priorities when multiple faults are present: This fault must be dealt with first in this multiple-fault case.
Conditions for applying the diagnosis on a stored fault: The fault is declared present after the engine is running and the steering wheel is turned lock to lock.
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| If the fault persists, contact the Techline. |
AFTER REPAIR
Switch off the ignition for 15 seconds.
Switch the ignition back on.
Clear the stored faults.
| DF020 PRESENT OR STORED | ECU POWER SUPPLY DEF: ECU internal voltage |
INSTRUCTIONS
Conditions for applying the diagnosis on a stored fault: The fault is declared present after the engine is running and the steering wheel is turned lock to lock.
| Check the condition and value of the power supply fuses (battery and ignition-switched +) of the electric power steering ECU. Replace if necessary. |
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| Check the battery voltage and the charging circuit. Repair if necessary. |
| If the fault persists, contact the Techline. |
AFTER REPAIR
Deal with any other faults.
Switch off the ignition for 15 seconds.
Switch the ignition back on.
Clear the stored faults.
| DF033 PRESENT OR STORED | MULTIPLEX NETWORK DEF: CAN link fault |
INSTRUCTIONS
Conditions for applying the diagnosis on a stored fault: The fault is declared present after the engine is running and the steering wheel is turned lock to lock.
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| Check the insulation, continuity and absence of parasitic resistance of the harness between the variable-assist steering ECU and the cabin central unit (refer to the wiring diagrams for the vehicle type): repair if necessary. Black 8-way connector pin 5 → Cabin central unit Replace the harness if necessary. |
| Check the insulation, continuity and absence of parasitic resistance of the harness between the variable-assist steering ECU and the instrument panel (refer to the wiring diagrams for the vehicle type): repair if necessary. 8-way black connector pin 4 → Instrument panel Replace the harness if necessary. |
| Apply the multiplex network diagnosis procedure. |
| If the fault persists, contact your Techline. |
AFTER REPAIR
Deal with any other faults.
Switch off the ignition for 15 seconds.
Switch the ignition back on.
Clear the stored faults.
| DF035 PRESENT OR STORED | VARIABLE-ASSIST STEERING MOTOR DEF: Open circuit or internal electronic fault |
INSTRUCTIONS
Priority in case of multiple faults: Deal with fault “DF020 ECU power supply” first if it is present or stored.
Conditions for applying the diagnosis on a stored fault: The fault is declared present after the engine is running and the steering wheel is turned lock to lock.
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| Perform a steering wheel angle learn by running command CF08 |
| If the fault persists, contact the Techline. |
AFTER REPAIR
Deal with any other faults.
Switch off the ignition for 15 seconds.
Switch the ignition back on.
Clear the stored faults.
| DF038 PRESENT OR STORED | ANGLE SENSOR DEF: Inconsistency |
INSTRUCTIONS
Conditions for applying the stored fault diagnosis: The fault is declared present after the engine is running and the steering wheel is turned from lock to lock, then returned to centre.
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| If fault DF038 is present, check the stored contexts. If parameter PR121 is not between -680 and 680, the steering angle sensor learn was not performed correctly because the steering wheel was not in the centre position with the wheels straight ahead. Repeat procedure CF085, and check for faults again. |
| If the fault persists, contact the Techline. |
AFTER REPAIR
After repair, start the vehicle and check whether parameter PR121 changes when the steering wheel is turned.
Deal with any other faults.
Switch off the ignition for 15 seconds.
Clear the stored faults.
Turn the steering wheel from lock to lock, slowly return it to centre, and check that there are no faults.
| DF053 PRESENT OR STORED | ECU CONFIGURATION DEF: Incorrect vehicle configuration |
INSTRUCTIONS
Conditions for applying the stored fault diagnosis: The fault is declared present after the engine is running.
| Conditions for applying the stored fault diagnosis: The fault is declared present after the engine is running. |
| Reconfigure the ECU to match the vehicle equipment and type. |
| If the fault persists, contact the Techline. |
AFTER REPAIR
Switch off the ignition for 15 seconds.
Clear the stored faults.
Confirm the configuration programmed previously.
| DF054 PRESENT OR STORED | TORQUE SENSOR DEF: Internal electronic fault in sensor |
INSTRUCTIONS
Conditions for applying the stored fault diagnosis: The fault is declared present after the engine is running and the steering wheel is turned from lock to lock, then returned to centre.
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| Perform a steering wheel angle learn by running command CF085. |
| If the fault persists, contact the Techline. |
AFTER REPAIR
Deal with any other faults.
Switch off the ignition for 15 seconds.
Switch the ignition back on.
Clear the stored faults.
| DF055 PRESENT OR STORED | ECU MEMORY DEF: EPROM fault |
INSTRUCTIONS
Conditions for applying the stored fault diagnosis: The fault is declared present after:
- turning the steering wheel
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| Reconfigure the ECU to match the vehicle equipment and type. |
| If the fault persists, contact the Techline. |
AFTER REPAIR
Deal with any other faults.
Switch off the ignition for 15 seconds.
Switch the ignition back on.
Clear the stored faults.
| DF057 PRESENT OR STORED | MULTIPLEXED VEHICLE SPEED INFORMATION DEF: CAN link fault |
INSTRUCTIONS
Conditions for applying the stored fault diagnosis:
The fault is declared present following:
- road test.
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| Check the insulation, continuity and absence of parasitic resistance of the harness between the variable-assist power steering ECU and the passenger compartment central unit (refer to the wiring diagrams for the vehicle type): Black 8-way connector pin 5 → Cabin central unit Replace the harness if necessary. |
| Apply the multiplex network diagnosis procedure. |
| Carry out a diagnosis of the anti-lock braking system (ABS). |
| If the fault persists, contact your Techline. |
AFTER REPAIR
Deal with any other faults.
Switch off the ignition for 15 seconds.
Switch the ignition back on.
Clear the stored faults.
| DF059 PRESENT OR STORED | ANGLE SENSOR DEF: Internal electronic fault in sensor |
INSTRUCTIONS
Conditions for applying the stored fault diagnosis: The fault is declared present after:
- starting the engine and turning the steering wheel from lock to lock, then returning it to the centre position.
| Check for a 12 V permanent supply on pin 1 and ground on pin 2 of the black 2-way connector, and a 12 V ignition-switched supply on pin 8 of the black 8-way connector of the steering column assembly. Repair if necessary. |
| If fault DF059 "Steering angle sensor" is present, check the stored contexts. If parameter PR121 is not between -680 and 680, the steering angle sensor learn was not performed correctly because the steering wheel was not in the centre position with the wheels straight ahead. Repeat procedure CF085, and check for faults again. |
| If the fault persists, contact the Techline. |
AFTER REPAIR
After repair, start the vehicle and check whether parameter PR121 changes when the steering wheel is turned.
Switch the ignition off for 15 seconds without fail.
Clear the stored faults.
Turn the steering wheel from lock to lock, slowly return it to centre and check that there is no fault.
Test yourself
A quick Renault Megane quiz: every answer comes with an explanation and a link to the manual page.