Display Does Not Dim or Brighten With Dimmer (Without Navigation)
Audio System Symptom Troubleshooting - Display does not dim or brighten with dimmer
Display does not dim or brighten with dimmer (without navigation)
NOTE:
- Check the vehicle battery condition first 12 Volt Battery Test.
- Check the connectors for poor connections or loose terminals.
1. Turn the ignition switch to ON (II).
2. Turn the combination light switch on and off to see if the symptom can be duplicated.
Can you duplicate the symptom?
YES -
Go to step 3.
NO -
Operation is normal.
3. Turn the combination light switch off.
4. Operate the illumination control dial.
Does the illumination control dial function normally?
YES -
Operation is normal.
NO -
Go to step 5.
5. Turn the ignition switch to LOCK (0).
6. Remove the audio unit.
NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD player's load mechanism.
7. Disconnect and check audio unit connector A (24P) for loose or a poor connection reconnect audio unit connector A (24P), and recheck the symptom.
Does the symptom still appear?
YES -
Go to step 8.
NO -
Operation is normal.
8. Turn the ignition switch to ON (II).
9. Measure the voltage between audio unit connector A (24P) terminals No. 2 and No. 4. Operate the dashlights brightness controller buttons to see if the voltage changes.
Does the voltage change?
YES -
Substitute a known-good center panel, and recheck. If the symptom/indication goes away, replace the original center panel. If symptom is still present, substitute a known-good audio unit Audio Unit Removal / Installation, and recheck. If the symptom/indication goes away, replace the original audio unit Audio Unit Removal / Installation.
NO -
Check for an open in the wire(s) between the under-dash fuse/relay box and the gauge control module. If the wires are OK, substitute a known-good gauge control module Service and Repair, and recheck. If the symptom goes away, replace the original gauge control module Service and Repair.