Left/Right Rear Level Control System Sensor -G76- / -G77-, Removing And Installing

Special tools and workshop equipment required 

• Torque Wrench 1331 5-50Nm VAG1331

General Information 

Vehicles with electronically-controlled damping and/or gas discharge lamps have an automatic headlamp range control system as standard equipment. Refer to AUTOMATIC HEADLAMP RANGE CONTROL .

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

For this, the position of the left/right trapezoidal control arm 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-. These transmit electrical signals to the Electronic Damping Control Module -J250- and/or Left High-intensity Gas Discharge Lamp Control Module -J343- /Right High-intensity Gas Discharge Lamp Control Module -344-.

Left High-intensity Gas Discharge Lamp Control Module -J343- /Right High-intensity Gas Discharge Lamp Control Module -344- servicing. Refer to HEADLAMP RANGE CONTROL MODULE, REMOVING AND INSTALLING .

At the front axle, these signals are transmitted from the Left Front Level Control System Sensor -G78- and Right Front Level Control Sensor -G289- to the Electronic Damping Control Module -J250- and/or Left High-intensity Gas Discharge Lamp Control Module -J343- /Right High-intensity Gas Discharge Lamp Control Module -344-.

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

• The lower transverse link has been removed and reinstalled or replaced
• The upper transverse link was removed and installed 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 coil springs were replaced,
• The level control system sensor coupling rod threaded connection was loosened at the lower transverse link.

Basic setting of the headlamps. Refer to HEADLAMP, ADJUSTING .

If the vehicle has electronically controlled damping, then the control position must be programmed using the Vehicle Diagnostic Tester. Refer to CONTROL POSITION, PROGRAMMING .

If the control position was reprogrammed on vehicles with lane assist, the Directional Stabilization Assistance Control Module -J759- must be calibrated again. Refer to LANE ASSIST, CALIBRATING .

Replacing Level Control System Sensor with Subframe Installed

-- Remove the wheel.

-- Disconnect the connector -2-.

Fig 1: Identifying Bolt -1-, Harness Connector -2- & Screws -3-

Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -1-.

-- Remove screws -3- with angled wrench. Do not bend upper retaining plate when doing so.

-- Remove level control system sensor.

Installing

Fig 2: Identifying Bolt -1-, Harness Connector -2- & Screws -3-

Courtesy of AUDI OF AMERICA, LLC

-- Adapt replacement part accordingly and install.

-- Install the bolts -3- using an angled wrench. Do not bend upper retaining plate when doing so.

Sensor lever must point outward.

-- Install the bolt -1-.

-- Re-establish the connector -2-.

Tightening specifications. Refer to OVERVIEW - TRANSVERSE LINK .

-- Perform the basic setting of the headlamps. Refer to HEADLAMP, ADJUSTING .

-- If the Level Control System Sensor -- was removed and installed on a vehicle with electronically controlled damping or if the linkage was loosened, the control position must be reprogrammed using the Vehicle Diagnostic Tester. Refer to CONTROL POSITION, PROGRAMMING .

-- If the control position was reprogrammed on vehicles with lane assist, the Directional Stabilization Assistance Control Module -J759- must be calibrated again. Refer to LANE ASSIST, CALIBRATING .