Circuit/System Verification

Ignition ON.
Verify the scan tool LED Backlight Dimming Command parameter changes between a high percentage to a low percentage while operating the dimmer switch from high to low.
- If the parameter does not change
  Refer to Dimmer Switch Malfunction .
- If the parameter changes
Verify the backlighting components turn ON and OFF while commanding the LED Backlight Dimming ON and OFF with a scan tool.
- If the backlighting components do not turn ON and OFF
  Refer to Interior Backlighting Malfunction .
- If the backlighting components turn ON and OFF
Verify the phrase PASSENGER AIR BAG is illuminated on the Passenger Air Bag Disable Indicator.
- If the phrase PASSENGER AIR BAG is not illuminated
  Refer to Passenger Air Bag Disable Indicator Backlighting Malfunction .
- If the phrase PASSENGER AIR BAG is illuminated
All OK.