Audi A4: Dynamic Steering

Overview - Dynamic Steering

1 - Steering Gear

• with Power Steering Control Module -J500-

2 - Electromechanical Power Steering Motor -V187-

• Steering column component
• Do not disconnect or loosen from the steering column
• Replace the steering column if faulty. Refer to → Chapter "Steering Column, Removing and Installing".

3 - Steering Column

• Overview. Refer to → Chapter "Overview - Steering Column".
• Perform the basic setting after replacing. Refer to → Chapter "Dynamic Steering Basic Setting"

4 - Active Steering Safety Lock Actuator -F437-

• Removing and installing. Refer to → Chapter "Active Steering Safety Lock (Locking Solenoid), Removing and Installing".

5 - Active Steering Control Module -J792-

• Component location: in front of the driver seat
• Removing and installing. Refer to → Chapter "Active Steering Control Module -J792-, Removing and Installing".
• Perform the basic setting after replacing. Refer to → Chapter "Dynamic Steering Basic Setting"

6 - Bolt

• 8 Nm

7 - Nut

• 6 Nm

8 - Bracket

• For the Active Steering Control Module -J792-

Active Steering Control Module -J792-, Removing and Installing

Special tools and workshop equipment required

• Torque Wrench 1783 - 2-10Nm -VAG1783-

Removing

- Remove the footrest. Refer to → Body Interior; Rep. Gr.70; Vehicle Interior Trim Panels; Footrest, Removing and Installing.

- Remove the A-pillar lower trim panel. Refer to → Body Interior; Rep. Gr.70; Vehicle Interior Trim Panels; A-Pillar Trim Panel, Removing and Installing.

- Free up the left front carpet and lift up slightly.

- Remove the bolts -arrows- and disconnect the connector -1-.

- Remove the Active Steering Control Module -J792--2-.

Installing

Install in reverse order of removal and note the following:

- Activate the control module after installing a new Active Steering Control Module -J792-.

- 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
• 1B - Active Steering Control Module J792
• 1B - Active Steering Control Module functions J792
• 1B - Replacing the control module

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

- The basic setting must be performed if the Active Steering Control Module -J792- was replaced. Refer to → Chapter "Dynamic Steering Basic Setting".

Tightening Specifications

• Refer to → Chapter "Overview - Dynamic Steering"

Dynamic Steering Basic Setting

Special tools and workshop equipment required

• Vehicle Diagnostic Tester
• Wheel Alignment Computer

Requirements

• Steering Angle Sensor -G85- is calibrated. Refer to → Chapter "Steering Angle Sensor -G85- Basic Setting".
• There are no entries in the DTC memory for the Active Steering Control Module -J792-.

Procedure

There are two choices for performing a basic setting on the dynamic steering:

The "quick access"

Select this procedure for the following operations if only the basic setting should be performed:

• The Steering Angle Sensor -G85- was calibrated.
• The Active Steering Control Module -J792- was replaced,
• The steering column was replaced.
• The steering wheel is crooked when driving straight.

The "complete alignment"

Select this procedure for the following operations if a basic setting and a wheel alignment should be performed.

• The front axle toe was adjusted.
• The rear axle toe was adjusted.
• The Steering Angle Sensor -G85- was calibrated.
• The Active Steering Control Module -J792- was replaced,
• The steering column was replaced.
• The steering wheel is crooked when driving straight.
• The vehicle suspension was changed, for example changing from standard to sport suspension.

Both procedures are programmed in the wheel alignment computer.

• The respective procedure is performed automatically.
• It is only necessary to select the appropriate program for the procedure that will be performed.

Preparation Work for Calibrating and Adjusting Driver Assist Systems. Refer to → Chapter "Preparation Work for Calibrating and Adjusting Driver Assist Systems".

- Select the basic setting procedure for dynamic steering in the alignment computer.

- Install the quick-action clamps on all four wheels.

- Install the measurement sensors on the front and rear wheels.

- Perform wheel run-out compensation. Refer to → Chapter "Wheel Run-Out Compensation".

  Note

• Disregard the steering wheel position when doing this.
• Only the display on the wheel alignment computer applies.

Perform any subsequent work using 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
• Steering
• 01 - OBD-capable systems
• 1B - Active Steering Control Module J792
• 1B - Active Steering Control Module functions J792
• 1B - Basic setting

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

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