Diagnostic Test

CHECK IF THE DTC IS ACTIVE
1. Turn the ignition on, headlamps on.
  NOTE:
  It may be necessary to drive the vehicle to enable this DTC to set.
2. With the scan tool, read Automatic Headlamp Leveling Module (AHLM) DTCs.
  Is this DTC active?
  
  Yes
  - Go To 2
  No
  - Go To 4
CHECK THE REAR HEADLAMP LEVEL SENSOR MOUNTING/LINKAGE
1. Turn the ignition off.
2. Disconnect the AHLM harness connector.
3. Disconnect the Rear Headlamp Level Sensor harness connector. Check the Rear Headlamp Level Sensor linkage/bracket for looseness, damage, binding or improperly mounted.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE REAR HEADLAMP LEVELING SENSOR
1. Turn the ignition off.
2. Replace the Rear Headlamp Leveling Sensor in accordance with the Service Information.
3. Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  Does this DTC reset after performing the Body Verification Test?
  
  Yes
  - Replace the Automatic Headlamp Leveling Module (AHLM) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Test Complete
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this module. Wiggle the wiring and connectors while checking for shorted and open circuits.
3. Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
4. Check the sensor linkage/bracket for looseness, damage or improperly mounted.
5. Check Service Bulletins for any possible causes that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Test complete.