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

Symptom Troubleshooting: Audio switch panel button illumination does not work

Audio switch panel button illumination does not work (without navigation)

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or loose terminals.

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

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 problem; the audio unit is OK at this time. Check for loose or poor connections at 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), or press the engine start/stop button to select the OFF mode.

6. Disconnect audio unit connector A (24P).
NOTE: Eject all the CDs before removing 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. 8.

Is there continuity?
YES - Go to step 9.

NO - Repair open in the wire between the gauge control module and the audio unit.






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

10. With the headlight switch still on, 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, replace the audio unit. Audio Unit Removal/Installation (Without Navigation)

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