8020 Navigation

8020 Navigation

GPS Antenna Short Circuit

Diagnostic conditions
- Ignition on
- PCM2 ON

NOTE:
- Fault code 8003 is recorded in the PCM2 MMI if the operating buttons are actuated for longer than '≥ 1 minute'.
- Deactivate the 'automatic traffic announcement' before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort.

Possible cause of fault
- Short circuit in the antenna lead between GPS antenna to PCM2 to body ground or B+.
- GPS antenna faulty.
- Navigation module faulty.
- PCM2 faulty.

NOTE:
The MOST optical wave guide is connected to the following control modules:
- PCM2
- CD changer
- Amplifier
- Telephone/telematics

Affected pins
Plug I, pin 1

Diagnosis/Troubleshooting

Work Instruction 1 - 6: