8004 CD Changer

8004 CD changer

Fault in speed control unit

Diagnostic conditions
- Ignition on
- PCM2/CDR23 ON

NOTE:
- The fault memory status (present / not present) is always updated when the motor is running.
- Fault code 8003 is recorded in the PCM2 MMI/CDR23 if the operating buttons are actuated for '≥ 1 Min.'.
- Deactivate the 'automatic traffic announcement' before performing the diagnosis on the PCM2/CDR23. If this is not done, the diagnosis will abort.

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