Audio Unit Button Illumination Does Not Work
Audio unit button illumination does not workNOTE: 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 - Intermittent failure the audio unit is OK at this time. Check for loose or poor connections at the audio unit connector A (17P).
NO - Go to step 4.
4. Check the illumination of several other dash components that are not related to the audio system.
Dose the illumination for the other dash components work properly?
YES - Go to step 5.
NO - Troubleshoot the dash lights. Start by checking the No. 22 (10 A) fuse in the under-dash fuse/relay box. If the fuse is OK, go to gauge control module input test, Component Tests and General Diagnostics and test circuits A15 and A9.
5. Turn the ignition switch to LOCK (0).
6. Disconnect audio unit connector A (17P).
NOTE: Eject the CD before removing the audio unit to prevent damaging the CD player's load mechanism.
7. Disconnect gauge control module connector A (20P).
8. Check for continuity between audio unit connector A (17P) No. 1 terminal and gauge control module connector A (20P) No. 15 terminal.
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) and turn the headlight switch on.
10. Check for voltage between audio unit connector A (17P) No. 10 terminal and body ground.
Is there battery voltage?
YES - Check the connections at audio unit connector A (17P). If all the connections are OK, replace the audio unit.
NO - Repair open in the wire between the under-dash fuse/relay box and the audio unit.