Procedures

STANDARD PROCEDURE

NOTE: The following procedure is necessary and should be performed ONLY after an Automatic Headlamp Leveling Module (AHLM) is replaced with a new (uncalibrated) unit.

1. Before beginning, the vehicle should be empty with between 1/4 and 1/2 tank of fuel.
2. Perform a mechanical Front Lamp Alignment of the headlamps. Headlamp Alignment.
3. Calibrate the AHLM. Follow the steps outlined in the diagnostic scan tool under the AHLM Electronic Control Unit (ECU), Miscellaneous Functions, Record Curb Sensor Values.