Audio Remote Switch Does Not Work Properly (With Navigation)

Audio System Symptom Troubleshooting - Audio remote switch does not work properly (with navigation)

Audio remote switch does not work properly ('10 model with navigation)

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.
- On vehicles with navigation, audio button operation can be checked by doing the hard key status test in the unit check screen. See navigation diagnostic mode Navigation System Diagnostic Mode.

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

2. Turn on the audio-navigation unit and check the audio remote switch operation (volume up, volume down, CH +, CH -, MODE).

Is the audio-navigation unit operation OK?

YES -

Intermittent failure, the audio remote switch is OK at this time. Check for loose connections.�

NO -

Go to step 3.

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

4. Test the audio remote switch Audio Remote Switch Test.

Is the audio remote switch OK?

YES -

Go to step 5.

NO -

Replace the audio remote switch Service and Repair, and recheck.�

5. Remove the audio-navigation unit Audio-Navigation Unit Removal/Installation.

6. Disconnect audio-navigation unit connector A (24P).

NOTE:

- Eject all the discs before removing the audio-navigation unit and the audio disc changer to prevent damaging the CD player's load mechanism.
- Remove the PC card before removing the audio-navigation unit.

7. Reconnect the audio remote switch, and measure the resistance between audio-navigation unit connector A (24P) terminals No. 5 and No. 16 as specified in the table.






AUDIO REMOTE SWITCH TABLE





Is the resistance OK?

YES -

Go to step 8.

NO -

Repair a short, an open, or high resistance in the wire(s) between the audio-navigation unit and the audio remote switch. If the wires are OK, replace the cable reel Service and Repair.�

8. Check for continuity between body ground and audio-navigation unit connector A (24P) terminals No. 5 and No. 16 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the audio-navigation unit and the audio remote switch. If the wires are OK, replace the cable reel Service and Repair.�

NO -

Substitute a known-good audio-navigation unit Audio-Navigation Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit Audio-Navigation Unit Removal/Installation.�