Checking The Demisting For The Rear Windshield And Door Mirrors

Checking the demisting for the rear windshield and door mirrors

Checking for a short-circuit
- Check fuse number 5 (25 A) in the integrated relay/fusebox in the engine compartment
- Check the voltage to the heating connector
- Check the relay for the heated rear windshield and door mirrors
- Check the cable between the demister relay (position 1) terminal #5 and fuse number 5 (25A) in the integrated relay/fusebox in the engine compartment. Check for an open-circuit and short-circuit to ground
- Check the wiring between the demister relay (position 1) terminal #3 and the demister for the rear windshield and door mirrors. Check for an open-circuit and a short-circuit to ground
- Check the demist connectors for contact resistance and oxidation
- Check the demist ground (0V). Check for contact resistance and oxidation.Check for an open-circuit
- Check the demist heater pad for an open-circuit.
Remedy as necessary.

Other information:
- For further information about the wiring and terminals, see the Wiring Diagrams Service Manual
- To replace the rear windshield demister, see The heating loops in the rear windshield Service and Repair
- To replace the demister in the door mirrors, see Door mirrors Door Mirrors
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault













Was a fault detected?

Yes - Verification

No - Fault-tracing information

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Verification

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








- Ignition off
- Connect the connectors, reinstall components etc.
- Ignition on.

Does the symptom recur?

Yes - Fault-tracing information

No - FAULT FOUND

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking for a short-circuit

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