Audio-Navigation Switch Panel Button Illumination Does Not Work (With ELS Audio System)

Symptom Troubleshooting: Audio-navigation switch panel button illumination does not work

Audio-navigation switch panel button illumination does not work (With ELS audio system)

NOTE:

- Check the vehicle battery condition first. Testing and Inspection

- Check the connectors for poor connections or loose terminals.

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

2. Turn the combination lighting switch to the parking light position.

3. Check the illumination of the audio-navigation switch panel buttons.

Are the buttons illuminated?
YES - Intermittent problem: The audio-navigation switch panel is OK at this time. Check for loose or poor connections at the audio-navigation switch panel 24P connector.

NO - Go to step 4.


4. Check the illumination of several other buttons not related to the audio system.

Are the buttons illuminated?
YES - Go to step 5.

NO - Troubleshoot the interior lights. Start by checking the No. 6 (7.5 A) fuse in the passenger's under-dash fuse/relay box. If the fuse is OK, check for an open in the wire between passenger's under-dash fuse/relay box and the audio-navigation switch panel.


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

6. Disconnect the audio-navigation switch panel 24P connector and the gauge control module 32P connector. Service and Repair

7. Check for continuity between audio-navigation switch panel 24P connector terminals No. 11 and No. 12 and gauge control module 32P connector terminals No. 3 and No. 2 respectively.

Is there continuity?
YES - Go to step 8.

NO - Repair an open in the wire between the gauge control module and the audio-navigation switch panel.






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

9. With the combination lighting switch in the parking light position, measure the voltage between audio-navigation switch panel 24P connector terminal No. 23 and body ground.

Is there battery voltage?
YES - Check the connections at the audio-navigation switch panel 24P connector. If all connections are OK, substitute a known-good audio-navigation switch panel, Audio-Navigation Switch Panel Removal/Installation (With Navigation) and recheck. If the symptom/indication goes away, replace the original audio-navigation switch panel.

NO - Repair an open in the wire between the passenger's under-dash fuse/relay box and the audio-navigation switch panel.