Fault-Tracing Information

Fault-tracing

Checking the function




- Ignition off.
- All doors and covers are closed.
Check if it is possible to lock and unlock the vehicle with the remote key. Try with several remote keys to exclude that there is a problem with the remote key.
If locking/unlocking works correctly, the problem is probably intermittent. Therefore, check the connectors and cables between Central electronic module (CEM) and Remote Receiver Module (RRX) for contact resistance and loose connection.

Hint: Check if there are error messages in the Driver information module (DIM) which warns for low battery level in remote keys.

Other information
- Checking wiring and terminals Checking Wiring And Terminals
- For replacing battery in remote key, see owner's manual.

Does locking and unlocking work?

Yes - Verification

No - Checking the wiring and terminals

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
To ensure the function, lock and unlock the vehicle with the remote key.

Is communication established?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking the function

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Checking the wiring and terminals




- Ignition off.
Check that the cables between Central electronic module (CEM) and Remote Receiver Module (RRX) are intact.
Check that the cable between Remote Receiver Module (RRX) and grounding point is intact.
Check the connectors on Central electronic module (CEM) and Remote Receiver Module (RRX) for contact resistance and loose connection.
- Ignition on.
Unplug the connector on Remote Receiver Module (RRX) and measure voltage supply (30-feed) in the connector.

Hint: It is easier if you are two when this measurement is performed.

If no problems are detected on cables and connectors, and there is voltage feed to Remote Receiver Module (RRX), it is likely that it is an internal error in Remote Receiver Module (RRX).
Remedy as necessary.

Other information
- Checking wiring and terminals Checking Wiring And Terminals
- Locking system receiver Locking System Receiver

Continue - Verification

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