Rear Vehicle Level Sensor

Rear Vehicle Level Sensor

General Information

Vehicles with level control and/or gas discharge lamps have standard 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 lower transverse link in relation to the body is transferred via a coupling rod to left rear level control system sensor (G76) and right rear level control system sensor (G77). They transmit electrical signals to the level control system control module (J197).

The signals from the left front level control system sensor (G78) and the right front level control sensor (G289) are transmitted to the level control system control module (J197) at the rear axle.

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

• Adapting control position and checking headlamp basic setting is necessary if:

• The lower transverse link 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 level control system sensor coupling rod threaded connection was loosened at the lower transverse link.

Special tools, testers and auxiliary items required

• Torque Wrench (V.A.G 1410)

Removing

- Place the vehicle on a hoist. Refer to => [ Positioning Vehicle on Hoist and Wheels ] Positioning Vehicle on Hoist and Wheels.

- Disconnect the harness connector - 2 -.






- Remove the bolt - 1 - from the coupling rod.

- Remove the bolts - 3 - and the vehicle level sensor.

Installing

Install in reverse order of removal. Note the following:

Sensor lever must point toward front.

Tightening specifications, refer to => [ Upper Transverse Link, Tie Rod, Lower Control Arm and Level Control System Sensor Overview ] Upper Transverse Link, Tie Rod, Lower Control Arm and Level Control System Sensor Overview

- Adapt the control position, refer to => [ Control Position, Programming with Vehicle Diagnosis Tester ] Testing and Inspection.