CD Changer

8004 CD Changer

Fault in speed control unit

Diagnostic conditions
- Ignition on
- PCM2/CDR23 on
- Functional audio CD inserted correctly in CD changer
- Start CD changer

NOTE:
- The fault memory status(present/not present) is always updated when the engine is running.
- Fault code 8003 is recorded in the PCM2 MMI if the operating buttons are actuated for '≥ 1 minute'.
- Deactivate the 'automatic traffic announcement' before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort (applies only to software version < 03).

Possible cause of fault
- CD changer faulty

NOTE:
- The MOST optical waveguide is connected to the following control modules:
- PCM2/CDR23
- CD changer
- Amplifier
- Telephone/telematics

Diagnosis/troubleshooting