Checking the Head Unit/Audio Unit Rheostat Function

Checking the head unit/audio unit rheostat function

Fault-tracing information
Check whether the rheostat function is working on the hazard warning flasher button by increasing and lowering the instrument lighting.

Hint: If the rheostat function is not working in the hazard warning flasher button, the fault is in the head unit/audio module.

Is the rheostat flash warning button working?

Yes - Replacing component

No - No Fault Found

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Replacing component
Try a new head unit/audio module.

Caution! New head unit/audio control module are supplied without software. The head unit/audio control module must be programmed after it has been replaced.

Other information:
- For information about programming and accessing/replacing the head unit/audio control module, see Radio cassette player, replacing Radio Cassette Player, Replacing.

Was a fault detected?

Yes - FAULT FOUND

No - No Fault Found

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