Level Control System Sensor

Level Control System Sensor

General Information

Vehicles with electronically controlled damping and/or HID headlamps have standard automatic headlamp range control.

To function properly, the electronically controlled damping and automatic headlamp range control system need information about compression travel or rebound travel at the front and rear axles.

For this, the position of the left/right track control arm in relation to the body is transferred via a coupling rod to Left Front Level Control System Sensor (G78) and Right Front Level Control Sensor (G289). These transmit electrical signals to the electronic damping control module (J250) and/or left/right high-intensity gas discharge lamp control module (J343/344).

At the rear axle, these signals are transmitted from the left rear level control system sensor (G76) and right rear level control system sensor (G77) to the electronic damping control module and/or the left/right high-intensity gas discharge lamp control module.

These signals are required for determining vehicle level.

The headlamp range control responds automatically to changes in the vehicle level.

The vehicle level can change in the following situations:

• Trailer Mode.

• Different load conditions; vehicle empty, vehicle partially or fully loaded.

• Programming the control position and checking the headlamp basic setting is always necessary in vehicles with electronically controlled damping if:

• The track control arm has been removed and reinstalled or replaced.

• The subframe was replaced.

• Installation work has been performed on the level control system sensor.

• The level control system sensor has been replaced.

• The threaded connection for coupling rod of level control system sensor was loosened at track control arm.

If the vehicle has electronically controlled damping, then the control position must be programmed. Refer to => [ Control Position, Programming using VAS 5051B ] Testing and Inspection.

The directional stabilization assistance control module (J759) must be re-calibrated if the control position has been "retaught" in vehicles equipped with lane assist. Refer to => [ Lane Assist Calibration Procedure ] Lane Assist Calibration Procedure.

Removing

- Remove the nuts - 1 - and the cover - 2 -.






- Disconnect the harness connector - 2 -.






- Remove nut - 3 -.

- Remove the bolt - 1 -.

- Remove level control system sensor - 4 -.

Installing

Install in reverse order of removal. Pay attention to the following:

• The only sensors that may be installed must be the same type.

Tightening specifications, refer to => [ Track Control Arm, Ball Joint, Guide Link and Level Control System Sensor Assembly Overview ] Track Control Arm, Ball Joint, Guide Link and Level Control System Sensor Assembly Overview.

Guide the retaining hook on the sensor bracket into the subframe.

The sensor lever must point toward the back.

Check the basic setting for the headlamp adjustment after loosening.

- The control position must be "retaught" if the vehicle level sensor has been removed or installed, or if the linkage rod has loosened, in vehicles equipped with electronic damping; refer to => [ Control Position, Programming using VAS 5051B ] Testing and Inspection.

- The directional stabilization assistance control module (J759) must be re-calibrated if the control position has been "retaught" in vehicles equipped with lane assist; refer to => [ Lane Assist Calibration Procedure ] Lane Assist Calibration Procedure.