Navigation Communication Line Circuit Troubleshooting

Navigation Communication Line Circuit Troubleshooting

1. Disconnect navigation unit connector A (20P) ('07 model) or connector A (32P) ('08-10 models).

2. Disconnect the climate control unit 30P connector.

3. Check for continuity between the following terminals of the front climate control unit 30P connector and navigation unit connector A (20P)('07 model) or connector A (32P) ('08-10 models).










Is there continuity?

YES -

Go to step 4.

NO -

Repair an open in the wire(s) between the front climate control unit and the navigation unit.�

4. Check for continuity between body ground and front climate control unit 30P connector terminals No. 6, 17, and 24 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the front climate control unit and the navigation unit.�

NO -

Check for loose wire or poor connections at the front climate control unit 30P connector and at the navigation unit connector A (20P) ('07 model) or connector A (32P) ('08-10 models). If the connections are good, substitute a known-good front climate control unit and/or navigation unit, and recheck. If the symptom/indication goes away, replace the original front climate control unit and/or the navigation unit.�