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 Testing and Inspection.
- Check the connectors for poor connections or loose terminals.
- If the vehicle is equipped with navigation, refer to the Display day/night mode does not work Symptom Troubleshooting.

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.

Is the symptom duplicated?

YES -

Go to step 3.

NO -

Operation is normal.�

3. Turn the combination light switch to OFF.

4. Push the dashlights brightness controller button.

Does the illumination dim and brighten normally as you rotate the dial?

YES -

Operation is normal.�

NO -

Go to step 5.

5. Turn the ignition switch to LOCK (0).

6. Remove the audio unit Audio Unit Removal/Installation (Without Navigation).

7. Disconnect audio unit connector A (17P), and check for a loose or a poor connection.�

NOTE: Eject all the discs before removing the audio unit to prevent damaging the CD player's load mechanism.

Reconnect audio unit connector A (17P) and recheck the symptom; does it 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 (17P) terminals No. 1 and No. 10. Push the dashlights brightness controller buttons to see if the voltage changes.





Does the voltage change?

YES -

Substitute a known-good audio unit Audio Unit Removal/Installation (Without Navigation), and recheck. If the symptom/indication goes away, replace the original audio unit Audio Unit Removal/Installation (Without Navigation). If the symptom/indication is still present, substitute a known-good center panel Audio Unit Removal/Installation (Without Navigation), and recheck. If the symptom/indication goes away, replace the original center panel Audio Unit Removal/Installation (Without Navigation).�

NO -

Repair an open in the wire between the under-dash fuse/relay box and the gauge control module.�