Function

Function of individual components

Components:

1. Control module

The control module is installed on the passenger's side below the passenger's airbag unit. If the control module is replaced, the following points must be observed:

1. Coding of the vehicle type
2. Calibration of the control module
3. Adjustment of the headlights

If a new control module is installed, fault codes "6 Control unit coding error" and "7 Calibration not performed yet" are stored.

Remedy:
Start the automatic control module search and code the vehicle type. Then perform a calibration and then erase the fault memory. Adjust the headlights after calibration.


2. Main light switch

The HBA system is activated when the parking light is switched on (terminal 58). The headlights are set to high-beam position when the high-beam switch is operated.


3. Angle sensor for HBA, rear

The sensor is fastened on the left side of the rear axle and is connected to the lower axle strut by a linkage.
A sensor measures the compression travel and forwards this value as a sensor voltage to the control module.


4. Angle sensor for HBA, front

The sensor is fastened on the left side of the front axle and is connected to the axle strut by a linkage. A sensor measures the compression travel and forwards this value as a sensor voltage to the control module.


5. Headlights

Headlight without lens:

Each headlight includes a stepper (servomotor for HBA) which is activated by the control module.