8009 PCM2 MMI

8009 PCM2 MMI

MOST Fault, Optical/Electrical

Diagnostic conditions
- Ignition on
- PCM2 on

Possible cause of fault
- An optical (optical waveguide) or electrical (PCM2) open circuit in the ring
- MOST switch in production mode
- MOST switch incorrectly coded
- An optically/electrically faulty MOST control module is connected to the MOST

NOTE:
The MOST optical waveguide is connected to the following control modules:
- PCM2 as of model year 2003
- CD changer
- Amplifier
- Telephone/telematics








Diagnosis/Troubleshooting

Work Instruction 1 - 4:

Work Instruction 5 - 6: