Exploded view

Fig 1: ABS/ESP ITT Mark 20 Exploded View

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - Rotor for right rear ABS wheel speed sensor

Rotor is welded to wheel hub.
Checking rotor. Refer to Rotor, checking or Rotor, checking
Removing and installing

Refer to 42 REAR SUSPENSION

2 - Right rear ABS wheel speed sensor -G44-

Removing and installing. Refer to Speed sensor, removing and installing or Speed sensor, removing and installing

3 - Left rear ABS wheel speed sensor -G46-

Removing and installing. Refer to Speed sensor, removing and installing or Speed sensor, removing and installing

4 - Rotor for left rear ABS wheel speed sensor

Rotor is welded to wheel hub.
Checking rotor. Refer to Rotor, checking or Rotor, checking
Removing and installing

Refer to 42 REAR SUSPENSION

5 - Parking brake indicator light -K14-

Installed position in instrument cluster

6 - ABS warning light -K47-

Installed position in instrument cluster

7 - Warning light for brake system -K118-, malfunction symbol

Installed position in instrument cluster in Driver Information System (DIS)

8 - Traction control indicator light -K86-

Installed position in instrument cluster

9 - Brake light disable relay (ESP) -J508-

Installed position at fuse box
Only for vehicles with ESP

10 - Brake light switch -F-

Removing and installing brake light switch. Refer to Brake light switch (square housing), removing and installing or Brake light switch (round housing), removing and installing

11 - Rotor for left front ABS wheel speed sensor

Rotor is welded to wheel hub.
Testing. Refer to Rotor, checking
Removing and installing

Refer to 40 FRONT SUSPENSION

12 - Left front ABS wheel speed sensor -G47-

Removing and installing. Refer to ABS wheel speed sensor, removing and installing

13 - ABS Hydraulic Unit -N55- with ABS control module (w/EDL) -J104-

The hydraulic control unit consists of the ABS hydraulic pump -V64-, ABS hydraulic unit -N55-, and the ABS control module (w/EDL) -J104-.
Removing and installing. Refer to ABS control module and hydraulic unit, removing and installing

14 - Rotor for right front ABS wheel speed sensor

Rotor is welded to wheel hub.
Testing. Refer to Rotor, checking
Removing and installing

Refer to 40 FRONT SUSPENSION

15 - Right front ABS wheel speed sensor -G45-

Removing and installing. Refer to ABS wheel speed sensor, removing and installing

16 - Longitudinal acceleration sensor -G251-

Only for vehicles with All Wheel Drive (AWD).
Installed position: A-pillar on passenger`s side
Removing and installing. Refer to Longitudinal acceleration sensor -G251-, removing and installing

17 - Sender -2- for brake booster -G214-

Removing and installing. Refer to Brake pressure sensors, removing and installing

18 - Sender -1- for brake booster -G201-

Removing and installing. Refer to Brake pressure sensors, removing and installing

19 - Brake pressure release solenoid -F84-

Brake booster assembly must be replaced if solenoid is defective

20 - Magnetic coil for brake pressure, in brake booster -N247-

Brake booster assembly must be replaced if solenoid is defective

21 - Brake fluid level warning switch -F34-

22 - Sensor for transverse acceleration -G200-

Removing and installing. Refer to Sensor for transverse acceleration -G200- and Sender for rotation rate -G202-, removing and installing

23 - Sender for rotation rate -G202-

Removing and installing. Refer to Sensor for transverse acceleration -G200- and Sender for rotation rate -G202-, removing and installing

24 - Anti-Slip control switch -E132-

Installed position at center console

25 - Steering angle sensor -G85-

Removing and installing. Refer to Steering angle sensor -G85-, removing and installing

26 - Parking brake warning light switch -F9-

Installed position at parking brake assembly