Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete. The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (L58) LEFT DAYTIME RUNNING LAMP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the Headlamps off.
2. Turn the ignition off.
3. Disconnect the Left Front Lamp Assembly C2 harness connector.
4. Disconnect the BCM C1 harness connector.
5. Turn the ignition on.
6. Measure the voltage between ground and the (L58) Left Daytime Running Lamp Driver circuit.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (L58) Left Daytime Running Lamp Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE BCM FOR CORRECT OPERATION
1. Reconnect the BCM C1 harness connector.
2. Connect a 12-volt test light between the (L58) Left Daytime Running Lamp Driver circuit and (Z910) Ground circuit in the Left Front Lamp Assembly C2 harness connector.
3. Turn the ignition on.
4. Turn the Headlamps on.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Left DRL Bulb in accordance with the Service Information. Refer to UNIT, FRONT LAMP, LOWER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .