Audio Unit Button Illumination Does Not Work

Symptom Troubleshooting: Audio unit button illumination does not work

Audio unit button illumination does not work

NOTE:

- Check the connectors for poor connections or loose terminals.

- Check the vehicle battery condition first.

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 - All buttons illuminated: Intermittent problem: the audio unit is OK at this time. Check for loose or poor connections at the audio unit connector C (24P).
Some button(s) illuminated: Audio panel is faulty, replace the audio panel.

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 the B-CAN line troubleshooting. Troubleshooting - B-CAN System Diagnosis Test Mode A If the B-CAN line is OK, substitute a known-good audio unit, and recheck. If the symptom/indicated goes away, replace the original audio unit. Audio Unit Removal/Installation If the symptom is still present, substitute a known-good audio panel, and recheck. If the symptom/indicated goes away, replace the original audio panel. Audio Unit Removal/Installation

NO - Troubleshoot the interior lights. Start by checking the No. 22 (7.5 A) fuse in the under-hood fuse/relay box. If the fuse is OK, check the interior light relay.