Fault Code 8018

08018 External BOSE amplifier

Fault in rear subwoofer

Diagnostic conditions
- Ignition on
- PCM2/CDR23 on

NOTE:
- Fault code 8003 is recorded in the PCM2 MMI if the operating buttons are actuated for '≥ 1 minute'.
- Deactivate the 'automatic traffic announcement' before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort (applies only to software < 03).
- This fault code is set by means of a self-test with the 9588 Porsche System Tester II.

Possible cause of fault
- Wiring harness/subwoofer loudspeaker faulty
- External BOSE amplifier output stage faulty

Affected pins
Amplifier control module, plug A, pins 4 and 16

Diagnosis/troubleshooting