Audi A4: Electronic Damping

Component Location Overview - Electronic Damping

1 - Front Level Control System Sensor

• Left Front Level Control System Sensor -G78-
• Right Front Level Control Sensor -G289-

• Overview. Refer to → Chapter "Overview - Front Level Control System Sensor".

2 - Shock Absorber with Right Front Damping Adjustment Valve -N337-

• Overview. Refer to → Chapter "Overview - Suspension Strut Coil Spring".

3 - Drivetrain Control Module -J775-

• Installation location: On the center tunnel
• Removing and installing. Refer to → Chapter "Drivetrain Control Module -J775-, Removing and Installing".

4 - Shock Absorber with Right Rear Damping Adjustment Valve -N339-

• Overview. Refer to → Chapter "Overview - Shock Absorber".

5 - Shock Absorber with Left Rear Damping Adjustment Valve -N338-

• Overview. Refer to → Chapter "Overview - Shock Absorber".

6 - Rear Level Control System Sensor

• Left Rear Level Control System Sensor -G76-
• Right Rear Level Control System Sensor -G77-

• Overview. Refer to → Chapter "Overview - Rear Level Control System Sensor".

7 - Shock Absorber with Left Front Damping Adjustment Valve -N336-

• Overview. Refer to → Chapter "Overview - Suspension Strut Coil Spring".

Electronic Damping Control Module -J250- - Tightening specification

- Tighten the nuts -arrows- to 8 Nm.

Electronic Damping Basic Setting

Adapting the height sensor end stops

Select this basic setting for the following operations:

• The threaded connection for a level control system sensor was loosened.
• A level control system sensor was removed and installed.
• A front or rear shock absorber was replaced.

Requirement:

• The vehicle must be raised on the hoist and the wheels are hanging freely, whereby the shock absorbers move into the end stops.

Adapting the height sensor zero position

Select this basic setting for the following operations:

• The threaded connection for a level control system sensor was loosened.
• A level control system sensor was removed and installed.
• The Drivetrain Control Module -J775- was removed and installed.

Requirements:

• The vehicle must be standing on a level surface.
• The vehicle may not be loaded.

Calibration of inertial sensors (sensors in control module)

Select this basic setting for the following operation:

• The Drivetrain Control Module -J775- was replaced

Requirements:

• The vehicle must be standing on a level surface.
• The vehicle may not be loaded.

  Note

The basic settings can be done individually or together.

Procedure

- Connect the Vehicle Diagnostic Tester.

- Switch the ignition on.

- Select and start the Diagnostic operating mode.

- Select the Test plan tab.

- Select the Select individual test button and select the following tree structure consecutively:

• Chassis
• Suspension control
• 01 - OBD-capable systems
• 74 - Drivetrain Control Module J775
• 74 - Drivetrain Control Module Functions
• 74 - Basic setting

- Start the selected program and follow the instructions on the Vehicle Diagnostic Tester display.

The following procedures must be performed after a basic setting:

• Adjust the headlamps. Refer to → Electrical Equipment; Rep. Gr.94; Headlamps; Headlamps, Adjusting.
• Driver assistance systems front camera, calibrating. Refer to → Chapter "Driver Assistance Systems Front Camera, Calibrating".

Drivetrain Control Module -J775-, Removing and Installing

Special tools and workshop equipment required

• Vehicle Diagnostic Tester

Removing

- Remove the center console. Refer to → Body Interior; Rep. Gr.68; Center Console; Center Console, Removing and Installing.

- Remove the nuts -arrows-, and remove the Electronic Damping Control Module -J250--1-.

- Disconnect the connector -2-.

Installing

Install in reverse order of removal and note the following:

Activate the control module after installing a new Electronic Damping Control Module -J250-:

- Connect the Vehicle Diagnostic Tester.

- Switch the ignition on.

- Select and start the Diagnostic operating mode.

- Select the Test plan tab.

- Select the Select individual test button and select the following tree structure consecutively:

• Drivetrain
• Suspension control
• 01 - OBD-capable systems
• 74 - Drivetrain Control Module J775
• 74 - Drivetrain Control Module Functions
• 74 - Control module, replacing

- Start the selected program and follow the instructions on the Vehicle Diagnostic Tester display.

Tightening Specifications

• Refer to → Fig. " Electronic Damping Control Module -J250- - Tightening specification"

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