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 unit is connected to the MOST

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







Affected pins

Diagnosis/troubleshooting

Diagnosis/troubleshooting (Part 1):

Diagnosis/troubleshooting (Part 2):