Audi Q7 Owners & Service Manuals

Audi Q7: Rear Axle Steering

Overview - Rear Axle Steering

Overview - Rear Axle Steering

1 - Nut

  • Tightening specification. Refer to -item 9-

2 - Eccentric Washer

3 - Tie Rod

  • Removing and installing. Refer to → Chapter "Tie Rod, Removing and Installing".

4 - Bolt

  • Replace after removing

5 - Rear Axle Steering Gear

  • With integrated Rear Axle Steering Control Module -J1019-
  • The Rear Axle Steering Control Module -J1019- cannot be replaced separately if faulty replace the rear axle.
  • Removing and installing. Refer to → Chapter "Rear Axle Steering Gear, Removing and Installing".

6 - Subframe

7 - Bolt

  • 90 Nm +180º
  • Replace after removing

8 - Heat Shield

9 - Bolt

  • 9 Nm

Rear Axle Steering Gear, Removing and Installing

Special tools and workshop equipment required

  • Locking Tool -T40326-, not shown

  Caution

This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure.

Mandatory Replacement Parts

  • Nut and Bolt - Tie Rod to Rear Axle Steering
  • Bolt - Rear Axle Steering to Subframe

Removing

Before starting work:

- Versions with coil springs: determine the curb weight position. Refer to → Chapter "Wheel Bearing in Curb Weight Position, Lifting Vehicles with Coil Spring".

- Versions with air suspension: determine the standard vehicle height. Refer to → Chapter "Wheel Bearing at Standard Vehicle Height, Lifting Vehicles with Air Suspension".

- Exhaust system without separating point: remove the rear muffler. Refer to → Rep. Gr.26; Exhaust Pipes/Mufflers; Overview - Muffler.

- Exhaust system with separating point: remove the exhaust pipe. Refer to → Rep. Gr.26; Exhaust Pipes/Mufflers; Overview - Muffler.

- Versions with air suspension: remove the nuts -arrows- and the cover -1- for the air supply unit.

A42-10778

- Release the safety catch in direction of -arrow-, push the retainer down and disconnect the connector from -3- from the Rear Axle Steering Control Module -J1019-.

- Disconnect the connector -2- on the Rear Axle Steering Control Module -J1019-.

  Note

Ignore -1-.

A42-10776

- Remove the left and right bolt -2- and disconnect the threaded connection -1-.

- Remove the bolt -4- and the rear axle steering -3-.

Installing

Install in reverse order of removal and note the following:

- Bring the rear axle steering into the installation position, install the Locking Tool - T40326-.

A42-10794

Right side of vehicle:

  • Pay attention to the labeling -2-"rechts/right".
  • The "arrow" points in the direction of travel.
  • The rear axle steering -1- is positioned on the points -3- on the locking tool pin.
  • The pin of the locking tool must engage in the holes -4- on the subframe.

A48-10774

Left side of vehicle

  • Pay attention to the labeling -3-"links/left".
  • The "arrow" points in the direction of travel.
  • The half round mounts -2- from the rear axle steering -4- must be positioned on the pin of the locking tool.
  • The pin of the locking tool must engage in the holes -1- on the subframe.

- Tighten the threaded connections for the rear axle steering.

- Remove the Locking Tool -T40326-.

- Lifting the wheel bearing in curb weight position (refer to → Chapter "Wheel Bearing in Curb Weight Position, Lifting Vehicles with Coil Spring") or at standard vehicle height (refer to → Chapter "Wheel Bearing at Standard Vehicle Height, Lifting Vehicles with Air Suspension").

- Install the tie rods. Refer to → Chapter "Tie Rod, Removing and Installing".

A48-10772

  Note

Pay attention to the procedures after installing the rear axle steering.

Procedures after Installing the Used Rear Axle Steering.

- After installing drive the vehicle on the alignment stand.

- Switch off the ignition when the vehicle has come to a stop. Only this way it can be ensured that the is in the straight-ahead position.

- Connect the Vehicle Diagnostic Tester.

- Switch the ignition on.

- Select and start the Diagnostic operating mode.

- Select the Test plan tab.

- Select the button Individual tests and select the following tree structures one after the other:

  • Suspension
  • Steering
  • 01 - OBD-capable systems
  • CB - Rear axle steering control module J1019
  • CB - Rear axle steering control module functions
  • CB - Basic setting

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

- Then measure the vehicle. Refer to → Chapter "Vehicle Alignment".

Procedures after Installing a New Rear Axle Steering.

- Connect the Vehicle Diagnostic Tester.

- Switch the ignition on.

- Select and start the Diagnostic operating mode.

- Select the Test plan tab.

- Select the button Individual tests and select the following tree structures one after the other:

  • Suspension
  • Steering
  • 01 - OBD-capable systems
  • CB - Rear axle steering control module J1019
  • CB - Rear axle steering control module functions
  • CB - Replacing the control module

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

- Drive the vehicle on the alignment stand.

- Switch off the ignition when the vehicle has come to a stop. Only this way it can be ensured that the is in the straight-ahead position.

- Connect the Vehicle Diagnostic Tester.

- Switch the ignition on.

- Select and start the Diagnostic operating mode.

- Select the Test plan tab.

- Select the button Individual tests and select the following tree structures one after the other:

  • Suspension
  • Steering
  • 01 - OBD-capable systems
  • CB - Rear axle steering control module J1019
  • CB - Rear axle steering control module functions
  • CB - Basic setting

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

- Then measure the vehicle. Refer to → Chapter "Vehicle Alignment".

Tightening Specifications

  • Refer to → Chapter "Overview - Rear Axle Steering"
  • Refer to → Rep. Gr.26; Exhaust Pipes/Mufflers; Overview - Muffler.
  • Refer to → Body Exterior; Rep. Gr.66; Underbody Trim Panel.

Rear Axle Steering Gear Orientation, Checking

Special tools and workshop equipment required

  • Locking Tool -T40326-

Procedure

- Drive the vehicle on the hoist.

- Switch off the ignition when the vehicle has come to a stop. This is the only way to ensure that the rear axle steering is in the straight-ahead position.

The orientation of the rear axle steering is checked as follows:

- Install the Locking Tool -T40326-.

Right side of vehicle:

  • Pay attention to the labeling -2-"rechts/right".
  • The "arrow" points in the direction of travel.
  • The rear axle steering -1- is positioned on the points -3- on the locking tool pin.
  • The pin of the locking tool must engage in the holes -4- on the subframe.

A48-10774

Left side of vehicle

  • Pay attention to the labeling -3-"links/left".
  • The "arrow" points in the direction of travel.
  • The half round mounts -2- from the rear axle steering -4- must be positioned on the pin of the locking tool.
  • The pin of the locking tool must engage in the holes -1- on the subframe.

- If the Locking Tool -T40326- cannot be inserted as described, align the rear axle steering gear. Refer to → Chapter "Rear Axle Steering Gear, Aligning".

A48-10772

Rear Axle Steering Gear, Aligning

Special tools and workshop equipment required

  • Locking Tool -T40326-

The rear axle steering must be aligned under the following conditions.

  • If there are drivability problems.
  • If there is high or uneven tire wear.

Procedure

- Versions with air suspension: remove the nuts -arrows- and the cover -1- for the air supply unit.

A42-10778

- Remove the left and right bolt -2- for the rear axle steering -3- and replace with new.

- Remove the bolt -4- and replace with new.

- Lightly install the bolts by hand.

  Note

Ignore item -1-.

- Install the Locking Tool -T40326-.

A42-10794

Right side of vehicle:

  • Pay attention to the labeling -2-"rechts/right".
  • The "arrow" points in the direction of travel.
  • The rear axle steering -1- is positioned on the points -3- on the locking tool pin.
  • The pin of the locking tool must engage in the holes -4- on the subframe.

A48-10774

Left side of vehicle

  • Pay attention to the labeling -3-"links/left".
  • The "arrow" points in the direction of travel.
  • The half round mounts -2- from the rear axle steering -4- must be positioned on the pin of the locking tool.
  • The pin of the locking tool must engage in the holes -1- on the subframe.

- Tighten the threaded connections for the rear axle steering.

- Remove the Locking Tool -T40326-.

- After installing drive the vehicle on the alignment stand.

- Switch off the ignition when the vehicle has come to a stop. This is the only way to ensure that the rear axle steering is in the straight-ahead position.

- Connect the Vehicle Diagnostic Tester.

- Switch the ignition on.

- Select and start the Diagnostic operating mode.

- Select the Test plan tab.

- Select the button Individual tests and select the following tree structures one after the other:

  • Suspension
  • Steering
  • 01 - OBD-capable systems
  • CB - Rear axle steering control module J1019
  • CB - Rear axle steering control module functions
  • CB - Basic setting

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

- Then measure the vehicle. Refer to → Chapter "Vehicle Alignment".

A48-10772

Tightening Specifications

  • Refer to → Chapter "Overview - Rear Axle Steering"

Special Tools

Special tools and workshop equipment required

  • Torque Wrench 1331 5-50Nm -VAG1331-

W00-11166

  • Torque Wrench 1332 40-200Nm -VAG1332-

W00-11165

  • Torque Wrench 1332 Insert - Ring Wrench - 21mm -VAG1332/7-

W00-11476

  • Hose Clip Pliers -VAG1921-

W00-11169

  • Torque Wrench Insert - Open Jaw -VAG1923-

W00-11621

  • Steering Wheel Scales -VAS6458-

W00-11697

  • Engine and Gearbox Jack -VAS6931-
  • Not illustrated:
  • Locking Tool -T40326-
  • Ball Joint Splitter -VAS251805-,

W00-11607

Revision History

DRUCK NUMBER: A005A010721

Revision History

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