Zero-Position Sensor
WARNING: This page does not describe the selected car, but rather 37 other vehicles, including the 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, 2005 BMW 330xi, and 2005 BMW 330i. However, it is still accessible from the selected car via links, so may be relevant.
The zero-position sensor records the zero position of the positioner module for the adaptive headlights as follows: If the positioner module drives past the zero-position sensor, the zero-position sensor signals a level change (between high and low).
The zero-position sensor is crucial for the operation of the positioner modules:
- When the vehicle is parked, the headlights drive to parked position (for terminal 15 OFF).
- Before the vehicle is driven, the headlights always perform a calibration sequence. During the calibration sequence, the headlights are moved from the parked position past the zero-position sensor and into the straight-ahead position.
- The zero-position sensor fails, the position of the headlights is determined via a mechanical reference point as follows: The positioner module moves as far as the permitted mechanical end stop and then into the straight-ahead position. The adaptive headlights function is then deactivated. The indicator lamp on the light switch (light switch cluster on the E46) flashes.