Lighting and Horns: Testing and Inspection

Automatic Headlamp Range Control

The automatic headlamp aim control system is installed on vehicles with High Intensity Gas Discharge (HID) headlamps.

The system contains the following components:

• Level control system sensors at front and rear axles

• Headlamp range control module

• Headlamp beam adjusting motors integrated with headlamp units

When driving, the system automatically adapts the headlamp beam inclination dependent on vehicle suspension movement and load. Headlamp glare to oncoming traffic is minimized.

=> [ OBD, Function ]

OBD, Function

The headlamp range control module is controlled by a microprocessor and has On Board Diagnostic (OBD) capability. If malfunctions occur in any of the system components, corresponding DTCs are stored in the Diagnostic Trouble Code (DTC) memory.

Before performing any troubleshooting or inspection, always begin by checking for DTCs using the On Board Diagnostic (OBD) program. DTCs stored in memory are retrieved/checked with VAS 5051/5052 tester in mode "Guided Fault Finding".