Front Level Control System Sensor: Notes

General Information

Vehicles with level control and/or gas discharge lamps have standard automatic headlamp range control. Refer to OVERVIEW - AUTOMATIC HEADLAMP RANGE CONTROL .

To function properly, the level control and automatic headlamp range control system needs 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-. This transmit electrical signals to the Left/Right High-intensity Gas Discharge Lamp Control Module -J343/344-.

Left/right high-intensity gas discharge lamp control module, servicing. Refer to LEFT/RIGHT HID HEADLAMP CONTROL MODULE -J343- /J344 .

At the rear axle, these signals from Left Rear Level Control System Sensor -G76- and Right Rear Level Control System Sensor -G77- are transmitted to 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.

It is always necessary to adapt the control position, to check the headlamp basic setting and to calibrate the lane assists when:

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

Adapt the control position. Refer to SELF-LEVELING SUSPENSION CONTROL POSITION, PROGRAMMING .

Headlamp basic setting. Refer to HEADLAMP, ADJUSTING .

Calibrating the lane assists. Refer to LANE ASSIST CALIBRATION PROCEDURE .