Possible cause of fault
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
- Open circuit to ring break diagnosis line ground/B+.
- The recipient MOST control module is faulty.
- PCM2 faulty.NOTE:
- The diagnosis distribution line is connected to the following MOST control modules:
- PCM2 as of model year 2003.
- PCM2 gateway.
- PCM2 MMI.
- PCM2 navigation (optional).
- The diagnosis distribution line and the MOST optical waveguide are connected to the following control modules:
- External amplifier (Harman or BOSE) (optional).
- CD changer (optional).
- Telephone/telematics (optional).