External Bose Amplifier

8004 External BOSE amplifier

Fault in front right/rear right loudspeaker channel

Diagnostic conditions
- Ignition on
- PCM2/CDR23 ON

NOTE:
- Fault code 8003 is recorded in the PCM2 MMI if the operating buttons are actuated for one or more minutes.
- 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, contact resistance or short circuit to B+/ground in the wiring harness
- Loudspeaker faulty
- Amplifier faulty

Affected pin







External BOSE amplifier, plug A, pins 23 and 28

Diagnosis/troubleshooting - BOSE

Part 1:

Part 2: