Display Does Not Dim Or Brighten With Dimmer (With Multi-Information Display)

Audio System Symptom Troubleshooting - Display does not dim or brighten with dimmer

Display does not dim or brighten with dimmer

NOTE:
* Check the vehicle battery condition first Battery Test.
* Check the connectors for poor connections or loose terminals.

1. Problem verification:

Problem verification
-1. Turn the ignition switch to ON (II).

-2. Turn the combination lighting switch to the parking light position.

-3. Rotate the dashlights brightness controller knob several times.

Does the multi-information display brightness change?
-YES- Intermittent failure, the system is OK at this time.
-NO- The failure is duplicated, go to step 2.

2. Multiplex integrated control system DTC check:

Multiplex integrated control system DTC check
-1. Turn the combination light switch off.

-2. Turn the ignition switch to LOCK (0).

-3. Connect the HDS to the DLC.

-4. Turn the ignition switch to ON (II).

-5. Clear the DTCs with the HDS.

-6. Turn the ignition switch to LOCK (0) and then back to ON (II).

-7. Check for DTCs with the HDS.

Are any DTCs indicated?
-YES- Go to indicated DTC's troubleshooting.
-NO- Replace the multi-information display unit Multi-Information Display Unit Removal And Installation.