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 BOSE

Diagnosis/troubleshooting - BOSE (Part 1):

Diagnosis/troubleshooting - BOSE (Part 2):