Audio Communication Line Circuit Troubleshooting (With Navigation)

Audio Communication Line Circuit Troubleshooting

With Navigation

1. Turn the ignition switch to LOCK (0).

2. Disconnect climate control unit connector A (28P) and the audio-navigation switch panel 24P connector.

3. Check for continuity between the following terminals of climate control unit connector A (28P) and the audio-navigation switch panel 24P connector.









Is there continuity?

YES -

Go to step 4.

NO -

Repair an open in the wire between climate control unit connector A (28P) and the audio-navigation switch panel 24P connector.�

4. Check for continuity between body ground and climate control unit connector A (28P) terminals No. 19 and No. 20 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire between climate control unit connector A (28P) and the audio-navigation switch panel 24P connector.�

NO -

Go to step 5.

5. Reconnect climate control unit connector A (28P).

6. Connect audio-navigation switch panel 24P connector terminals No. 7 and No. 19 with a jumper wire.





7. Turn the ignition switch to ON (II).

8. Press and hold the WINDSHIELD DEFOGGER button and ON/OFF button.

Is the WINDSHIELD DEFOGGER button LED blinking?

YES -

The audio-navigation switch panel is faulty, replace the audio-navigation switch panel Audio-Navigation Switch Panel Removal/Installation.�

NO -

The climate control unit is faulty, replace the climate control unit Climate Control Unit Removal/Installation.�