Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify the left upper daytime running lamp turns ON and OFF while commanding the Left Front Park Lamp/Daytime Running Lamp ON and OFF with a scan tool.
- If the left upper daytime running lamp does not turn ON and OFF
  Refer to Daytime Running Lamps Malfunction - Primary.
- If the left upper daytime running lamp turns ON and OFF
Verify the right upper daytime running lamp turns ON and OFF while commanding the Right Front Park Lamp/Daytime Running Lamp ON and OFF with a scan tool.
- If the right upper daytime running lamp does not turn ON and OFF
  Refer to Daytime Running Lamps Malfunction - Primary.
- If the right upper daytime running lamp turns ON and OFF
Verify the left lower auxiliary daytime running lamp turns ON and OFF while commanding the Left Lower Park/Daytime Running Lamp ON and OFF with a scan tool.
- If the left lower auxiliary daytime running lamp does not turn ON and OFF
  Refer to Daytime Running Lamps Malfunction - Auxiliary.
- If the left lower auxiliary daytime running lamp turns ON and OFF
Verify the right lower auxiliary daytime running lamp turns ON and OFF while commanding the Right Lower Park/Daytime Running Lamp ON and OFF with a scan tool.
- If the right lower auxiliary daytime running lamp does not turn ON and OFF
  Refer to Daytime Running Lamps Malfunction - Auxiliary.
- If the right lower auxiliary daytime running lamp turns ON and OFF
Refer to Ambient Light Sensor Malfunction - without CE1 or Rain/Ambient Light Sensor Module Malfunction - with CE1.