8004 External BOSE Amplifier

8004 BOSE External Amplifier

Rear Loudspeaker Channel Faulty

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 if the operating buttons are actuated for longer than '≥ 1 minute'.
- Deactivate the 'automatic traffic announcement' before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort.

Possible cause of fault
- Open circuit, high contact resistance or short circuit to B+/ground in wiring harness
- Speaker faulty
- Amplifier faulty

Affected pin
BOSE external amplifier plug A, pin 23, pin 24, pin 26, pin 28.







Diagnosis/Troubleshooting

Work Instruction 1 - 6:

Work Instruction 7 - 10: