Precautions for Headlight Auto Leveling System Service
Precautions: Precautions for Body, Cab and Accessories · General safety (00)
Headlight auto leveling system must be initialized after performing any of the following operations. 
•Replacement of the headlight auto leveling control module
•Replacement of the rear vehicle height sensor
•Removal of the rear vehicle height sensor
•Replacement of the rear vehicle height sensor
•Removal of the rear vehicle height sensor