Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

Ignition - On / Vehicle - In Service Mode
Verify the component activates: Radio SpeakerThe balance and fade controls can be used to help isolate an inoperative speaker or poor sound condition.
- If the component does not activate
  Refer to: Speaker Malfunction (UQP) , or Speaker Malfunction (UQG) .
- Go to next step: If all components operate
Headlamp Switch - Off
Verify the scan tool parameter: Headlamp Switch Signal = OFF (or Inactive)
- If not the specified state
  Refer to: Headlamps Malfunction
- Go to next step: If the specified state
Turn Signal Switch - Off
Verify the scan tool parameter: Left Turn Signal Switch & Right Turn Signal Switch = Inactive
- If not the specified state
  Refer to: Turn Signal Lamps and/or Indicators Malfunction
- Go to next step: If the specified state
All OK.