Headlight Driver Module
The headlight driver module controls and monitors the stepper motors for the adaptive headlights and the headlight beam throw adjustment system of the respective bi-xenon headlight.
The integrated chassis management makes available the values for the dynamic headlight beam throw adjustment system to the footwell module. The footwell module receives these values via the K-CAN2. In this way the beam angle can be adapted to the different driving situations, e.g. laden/unladen.
The signal from the integrated chassis management must be transferred to the KCAN2 in the central gateway module.
| Index | Explanation |
|---|---|
| 1 | Stepper motor for adaptive headlight |
| 2 | Headlight driver module |
| 3 | Stepper motor, headlight vertical aim control |
| 4 | Zero position sensor |
| 5 | LIN-Bus |
| 6 | Coding pin for right/left |
| 7 | Voltage supply + |
The headlight driver module fulfils the following functions:
- Receiving and evaluating the data sent from the footwell module via the LIN-bus:
- Reference run
- Target position commands
- Diagnosis requests
- Output control of the stepper motors
- Zero position acquisition of swivel module
- Reference run of swivel module
- Position feedback of swivel module to footwell module
- Diagnosis
- Feedback of diagnosis data to the footwell module.
The footwell module in its function as the central control unit for the adaptive headlight checks the status of the headlight driver modules every 20 ms.
Furthermore, the footwell module initiates activation of the LEDs in the front headlights.