Audio Communication Line Circuit Troubleshooting

Audio Communication Line Circuit Troubleshooting

With Navigation

1. Disconnect climate control unit connector A (32P) and the audio-navigation switch panel 24P connector.

2. Check for continuity between the following terminals of climate control unit connector A (32P) and the audio-navigation switch panel 24P connector.





Is there continuity?
YES - Go to step 3.

NO - Repair open in the wire between climate control unit connector A (32P) and the audio-navigation switch panel 24P connector.






3. Check for continuity between body ground and climate control unit connector A (32P) terminals No. 3 and No. 4 individually.

Is there continuity?
YES - Repair short to body ground in the wire between climate control unit connector A (32P) and the audio-navigation switch panel 24P connector.

NO - Go to step 4.






4. Reconnect climate control unit connector A (32P).

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

6. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

7. Press and hold the front DEF button and OFF button.

Is the front DEF button LED blinking?
YES - The audio-navigation switch panel is faulty, replace the audio-navigation switch panel. Audio-Navigation Switch Panel Removal/Installation (With Navigation)

NO - The climate control unit is faulty, replace the climate control unit. Climate Control Unit Removal/Installation






Without Navigation

1. Disconnect climate control unit connector A (32P) and the audio-HVAC display unit 12P connector.

2. Check for continuity between the following terminals of climate control unit connector A (32P) and the audio-HVAC display unit 12P connector.





Is there continuity?
YES - Go to step 3.

NO - Repair open in the wire between climate control unit connector A (32P) and the audio-HVAC display unit 12P connector.






3. Check for continuity between body ground and climate control unit connector A (32P) terminals No. 3 and No. 4 individually.

Is there continuity?
YES - Repair short to body ground in the wire between climate control unit connector A (32P) and the audio-HVAC display unit 12P connector.

NO - Go to step 4.






4. Reconnect climate control unit connector A (32P).

5. Connect the audio-HVAC display unit 12P connector No. 7 and No. 8 terminals with a jumper wire.

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

7. Press and hold the front DEF button and OFF button.

Is the front DEF button LED blinking?
YES - The audio-HVAC display unit is faulty, replace the audio-HVAC display unit. Audio-HVAC Display Unit Removal/Installation (Without Navigation)

NO - The climate control unit is faulty, replace the climate control unit. Climate Control Unit Removal/Installation