Audio Unit Button Illumination Does Not Work (With ELS Audio System) (With Navigation System)
Audio System Symptom Troubleshooting - Audio unit button illumination does not work (with ELS audio system)
Audio unit button illumination does not work (with ELS 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 unit buttons.
Are the buttons illuminated?
YES -
Intermittent failure, the audio unit is OK at this time. Check for loose or poor connections at audio unit connector A (17P).
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. Disconnect audio unit connector A (17P).
NOTE: Eject all CDs before disconnecting the audio unit and CD changer to prevent damaging the CD.
7. Disconnect the gauge control module 36P connector.
8. Check for continuity between audio unit connector A (17P) terminal No. 1 and 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 unit.
9. Turn the ignition switch to ON (II).
10. With the combination light switch in the parking light position, measure the voltage between audio unit connector A (17P) terminal No. 10 and body ground.
Is there battery voltage?
YES -
Check the connection at audio unit connector A (17P). If the connection is OK, substitute a known-good audio unit Audio Unit Removal/Installation (With Navigation System), and recheck. If the symptom/indication goes away, replace the original audio unit Audio Unit Removal/Installation (With Navigation System).
NO -
Troubleshoot the interior lights 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 unit.