Audio Switch Panel Button Illumination Does Not Work (With Premium Audio System) (Without Navigation System)

Audio System Symptom Troubleshooting - Audio switch panel button illumination does not work (with premium audio system)

Audio switch panel button illumination does not work (with premium audio)

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors for poor connections or loose terminals.

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

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

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

Are the buttons illuminated?

YES -

Intermittent failure, the audio switch panel is OK at this time. Check for loose or poor connections at audio switch panel connector A (20P).

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 -

Go to step 9.

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

6. Remove the audio switch panel, then check the bulbs Audio Switch Panel Removal / Installation (Without Navigation System).

Are the bulbs OK?

YES -

Go to step 7.

NO -

Replace the failed audio switch panel bulbs Audio Switch Panel Removal / Installation (Without Navigation System).

7. Disconnect audio switch panel connector A (20P) and the gauge control module 36P connector.

8. Check for continuity between audio switch panel connector A (20P) terminal No. 18 and the gauge control module 36P connector terminal No. 16.





Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire between the gauge control module and the audio switch panel.

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

10. With the combination light switch in the parking position, measure the voltage between audio switch panel connector A (20P) terminal No. 20 and body ground.





Is there battery voltage?

YES -

Check the connection at audio switch panel connector A (20P). If the connection is OK, replace the audio switch panel Audio Switch Panel Removal / Installation (Without Navigation System).

NO -

Troubleshoot the interior light circuit. Start by checking the No. 14 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is OK, check for an open in the wire between the under-dash fuse/relay box and the audio switch panel.