PCM2/CDR23 (MMI)

8007 PCM2-MMI

Ring break diagnosis line open circuit

Diagnostic conditions
- Ignition ON.
- PCM2 on.

Possible cause of fault
- Ping break diagnosis line: short circuit to ground! B+ or open circuit
- The recipient MOST control module is faulty
- PCM2 faulty

NOTE:
- The ring break diagnosis line is connected to the following MOST control modules:
- PCM2 gateway
- PCM2 MMI
- PCM2 navigation (optional)
- The ring break diagnosis line and the MOST optical wave guide are connected to the following control modules:
- External amplifier (Harman or BOSE) (optional)
- CD changer (optional)
- Telephone/telematics (optional)







Affected pin
PCM2 plug C, pin -4

Diagnosis/troubleshooting