PCM2/CDR23 - Navigation

8020 Navigation

GPS antenna short circuit

Diagnostic conditions
- Ignition on
- PCM2 on
- Navigation active

NOTE:
- Fault code 8003 is recorded in the PCM2 MMI if the operating buttons are actuated for 1 Min.
- 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
- Antenna input signal insufficient
- 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
- Amplifier optional (Harman or BOSE)
- CD changer
- Telephone/telematics

Affected pins
Plug I, pin 1

Diagnosis/troubleshooting

Work Instruction 1 - 5:

Work Instruction 6: