Fault-Tracing Information

Fault-tracing information

Condition




The signal from the back-up (reversing) lamp switch controls whether or not all the navigation settings in the audio unit can be changed or not during GPS navigation.

Substitute value
- None.

Possible source
- Contact resistance or oxidation in the connectors
- Open-circuit, short-circuit to ground or short-circuit to voltage in the signal cable between the audio unit and the back-up (reversing) lamp switch
- Defective or incorrectly installed back-up (reversing) lamp switch.

Fault symptom[s]
- The settings cannot be changed.