8020 Navigation

8020 Navigation

GPS antenna short circuit

Diagnostic conditions
- Ignition on
- PCM2 on

NOTE:
- Actuating the operating buttons for '≥ 1 Min.' results in a fault code 8003 being recorded in PCM2 MMI
- 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 wiring from GPS antenna on PCM2 to ground or B+
- GPS antenna faulty
- Navigation module faulty
- PCM2 faulty

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

Affected pin
Plug I, pin 1

Diagnosis/troubleshooting