8004 External Harman Amplifier

8004 External Harman amplifier

Fault in rear loudspeaker

Diagnostic conditions
- Ignition on
- PCM2/CDR23 ON

NOTE: Fault code 8003 is recorded in the PCM2 MM/ if the operating buttons are actuated for '≥ 1 Min.'.

Possible cause of fault
- Short circuit to B+/ground in the wiring harness
- Short circuit - loudspeaker faulty
- Short circuit - amplifier faulty

Affected pin
External Harman amplifier, plug A, pin 24, pin 29, pin 25, pin 38


Diagnosis/troubleshooting

Part 1:

Part 2: