Audio Switch Panel Button Illumination Does Not Work (With Premium Audio)

Audio System Symptom Troubleshooting - Audio switch panel button illumination does not work

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 the combination lighting switch to the parking light position.

3. Check the illumination of the audio unit buttons.

Are the buttons illuminated?

YES -

Intermittent failure, the audio unit is OK at this time. Check for loose or poor connections at the audio unit connector A (24P).�

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 the passenger's under-dash fuse/relay box and the audio unit.�

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

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

NOTE: Eject all the disc(s) before disconnecting the audio unit to prevent damaging the CD player's load mechanism.

7. Disconnect the gauge control module 32P connector.

8. Check for continuity between audio unit connector A (24P) terminal No. 1 and gauge control module 32P connector terminal No. 2.





Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire between the audio unit and the gauge control module.�

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

10. With the combination lighting switch in the parking light position, measure the voltage between audio unit connector A (24P) terminal No. 13 and body ground.





Is there battery voltage?

YES -

Check the connections at audio unit connector A (24P). If all connections are OK, substitute a known-good audio switch panel Audio Switch Panel Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio switch panel Audio Switch Panel Removal/Installation. If the symptom/indication is still present, replace the audio unit Audio Unit Removal/Installation. �

NO -

Repair an open in the wire between the passenger's under-dash fuse/relay box and the audio unit.�