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Standard Procedure - AHLM Calibration

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. Refer to STANDARD PROCEDURE .
  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.
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