Illumination Mode Test

Illumination Mode Test

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) .


Circuit/System Description

When the Increase and Decrease interior illumination dimmer buttons are pressed simultaneously for an extended period, the vehicles interior illumination will all set to night mode. Only the vehicles speedometer will remain illuminated. When the Increase and Decrease dimmer button are pressed simultaneously again for an extended period, the vehicles interior illumination will return to previous illumination setting. The Illumination test is performed using the scan tool, and commands the infotainment unit to change the illumination mode. You can choose between Day and Night mode. When day mode is selected the infotainment unit will be illuminated. In night mode the infotainment unit illumination will turn off.


Diagnostic Aids

* This diagnostic is for the infotainment unit day / night illumination mode feature.
* Before diagnosis of the illumination mode feature, make sure the primary controls of the associated components are functioning properly.



Reference Information

Scan Tool Reference

Control Module References (Programming and Relearning)


Component Testing

Important: It is recommended that component testing is performed before circuit testing when diagnosing infotainment unit functions.



1. Connect the scan tool to the DLC and select Infotainment
System / Audio System / Actuator Test / Display / Illumination Mode .
2. Ignition On, infotainment unit On.
3. Select day illumination mode by pressing the Day soft key on the scan tool. The infotainment unit illumination should set to maximum brightness.
4. Select night illumination mode by pressing the Night soft key on the scan tool. The infotainment unit illumination should dim significantly.
5. Press the Quit soft key to exit the test.

• If the illumination mode function does not operate correctly, replace the infotainment unit.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) .


Radio Replacement (Service and Repair)