Audi Q7 Owners & Service Manuals

Audi Q7: General Information

  Note

  • On this vehicle the brake system is divided by axle.
  • Right and left front axle
  • Right and left rear axle

Anti-Lock Braking System (ABS) Repair Information

  Note

ABS malfunctions do not affect the brake system and the booster. The conventional brake system remains operative even without ABS. A change in braking behavior should be checked. When the ABS indicator lamp comes on the rear wheels can lock-up early when braking!

  WARNING

  • The ABS is generally maintenance-free.
  • Testing, assembly, and repair work may only be performed by qualified personnel.
  • By not observing the points described in the repair manual, the system can be damaged and vehicle safety could be compromised.
  • Before performing repair work on the ABS system, determine the cause of the damage using OBD.
  • Disconnect the battery ground cable when the ignition is switched off.
  • When handling brake fluid, observe the relevant safety precautions and notes. Refer to → Chapter "Brake Fluid General Information".
  • Bleed the brake system with the Brake Charger/Bleeder Unit -VAS5234- for all work that requires opening the hydraulic system. High and low pressure testing should also be performed on the brake system.
  • During the final road test, ensure that a ABS-controlled brake test is performed at least once (pulsation must be felt at the brake pedal).

Component Location Overview

Component Location Overview - ABS/ESP

Component Location Overview - ABS/ESP

1 - Front Speed Sensor

  • Left Front ABS Wheel Speed Sensor -G47-
  • Right Front ABS Wheel Speed Sensor -G45-
  • Overview. Refer to → Chapter "Overview - Front Axle Speed Sensor".

2 - Hydraulic Control Unit

  • With
  • ABS Control Module -J104-
  • ABS Hydraulic Unit -N55-
  • The control module and the hydraulic unit can be separated
  • Overview. Refer to → Chapter "Overview - Control Module and Hydraulic Unit".

3 - Steering Angle Sensor -G85-

  • Integrated in the Steering Column Switch Module
  • Cannot be replaced separately
  • If faulty replace the steering gear. Refer to →Electrical Equipment; Rep. Gr.94.

4 - Vacuum Sensor -G608-

5 - Switch Module in Instrument Panel, Center -EX22-

  • With
  • ASR/ESP Button -E256-
  • Hill Descent Control Button -E618- (equipment level)
  • Removing and installing. Refer to → Electrical Equipment; Rep. Gr.96; Controls; Component Location Overview - Controls in Center Console.

6 - Electromechanical Parking Brake Button -E538-

  • Electromechanical Parking Brake Button -E538-
  • -AUTO HOLD- Button -E540- (equipment level)
  • Removing and installing. Refer to → Electrical Equipment; Rep. Gr.96; Controls; Electromechanical Parking Brake Button E538/-AUTO HOLD- ButtonE540, Removing and Installing.

7 - Roof Rack Recognition Sensor -G625-

  • Component location: in the roof railing

8 - Brake Pad Wear Sensor

  • Left Front Brake Pad Wear Sensor -G34-
  • Right Front Brake Pad Wear Sensor -G35-
  • Left Rear Brake Pad Wear Sensor -G36-
  • Right Rear Brake Pad Wear Sensor -G37-
  • Actually in the inner brake pad.
  • Overview. Refer to → Chapter "Overview - Front Brakes", and → Chapter "Overview - Rear Brakes".

9 - Rear Speed Sensor

  • Right Rear ABS Wheel Speed Sensor -G44-
  • Left Rear ABS Wheel Speed Sensor -G46-
  • Overview. Refer to → Chapter "Overview - Rear Axle Speed Sensor".

10 - Instrument Cluster with Instrument Cluster Control Module -J285-

  • With the following integrated indicator lamps:
  • ABS Indicator Lamp -K47-
  • Brake System Indicator Lamp -K118-
  • Parking Brake Indicator Lamp -K139-
  • The indicator lamps cannot be replaced separately
  • Replace the instrument cluster if faulty. Refer to → Electrical Equipment; Rep. Gr.90; Instrument Cluster; Overview - Instrument Cluster.

11 - Brake Lamp Switch -F-

  • Component location: on the brake master cylinder
  • Overview. Refer to → Chapter "Overview - Brake Booster/Brake Master Cylinder".

    READ NEXT:

     Control Module and Hydraulic Unit

    Overview - Control Module and Hydraulic Unit   Note If the ABS Control Module -J104- is faulty it can be replaced separately. If the ABS Hydraulic Unit -N55- is faulty it must be replaced t

     Control Module, Separating from Hydraulic Unit

    Special tools and workshop equipment required ESD Work Surface -VAS6613-   Note If the ABS Control Module -J104- is faulty it can be replaced separately. If the ABS Hydraulic Unit -N55-

     Sensors

    Overview - Front Axle Speed Sensor 1 - Wheel Bearing Housing Clean the inner surface of the hole before inserting the speed sensor. 2 - Front Speed Sensor Right Front ABS Wh

    SEE MORE:

     Wheel Covers, Removing and Installing

    Wheel Cover, Removing and Installing, Front   Caution This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure. Refer to → Chapter "Overview - Wheel Covers" Special tools and workshop equipment required Wedge Set -T10383- Clea

     Side Windows

    Overview - Rear Side Window 1 - Rear Side Window Removing and Installing. Refer to → Chapter "Rear Side Window, Removing and Installing". after installing push in first with the retainers -item 8- 2 - Adhesive Bead Observe the minimum curing time. Refer to →&nb

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