Headlamp: Testing and Inspection

HID Headlamps OBD Function

The automatic vertical headlamp beam adjusting control module of the HID headlamp system is controlled by an internal microprocessor with On Board Diagnostic (OBD) capability. If malfunctions occur in monitored components, Diagnostic Trouble Codes (DTC) will be stored in memory.

Troubleshoot system malfunctions, code control modules or perform basic settings with OBD program. Use Vehicle Diagnostic Testing and Information System VAS 5051 / VAS5052 in mode "Guided Fault Finding".

- Enter appropriate model, equipment and model year information and press ">" to confirm.

After the DTC memory of all control modules has been checked:
- Press "Go to" button
- Select "Function / Component Selection"
- Select: "Body
- Select: "Electrical System
- Select: "01 - On Board Diagnostic (OBD) capable systems"
- Select: "Automatic vertical headlamp aim control"
- Select: appropriate option
- Follow tester prompts