Antilock Brake System Overview

Component locations: Anti-Lock Brake Systems

Anti-Lock Brake System Overview







1 ABS control module (w/EDL) -J104-
• Component location: On the hydraulic unit, right suspension strut tower.
2 ABS hydraulic unit -N55-
• Component location: On the right suspension strut tower.
The hydraulic unit consists of the components:
• ABS hydraulic pump -V64-
• Valve block (contains inlet and outlet valves)
• Brake pressure sensor 1 -G201-
3 Brake pad wear indicator lamp -K32-
• Component location: In the instrument cluster.
4 ABS indicator lamp -K47-
• Component location: In the instrument cluster.
5 Brake system indicator lamp -K118-
• Component location: In the instrument cluster.
6 ASR/ESP indicator lamp 2 -K216-
• Component location: In the instrument cluster.
7 ASR/ESP indicator lamp -K155-
• Component location: In the instrument cluster.
8 Brake lamp switch -F- => [ Brake lamp switch ] See Image Below.
9 ASR/ESP button -E256-
• Component location: In center console.
10 Steering angle sensor -G85-
• Component location: On steering column between steering wheel and steering column switch.
11 ESP sensor unit -G419- => [ ESP sensor unit ] See Image Below.
Combined in one housing:
• Transverse acceleration sensor -G200-
• Rotation rate sensor -G202-
• Longitudinal acceleration sensor -G251-
12 Diagnostic Connection
• Component location: Driver side footwell cover
13 Wheel Hub with Wheel Bearing
14 Right front ABS wheel speed sensor -G45- / Left front ABS wheel speed sensor -G47- => [ Front Wheel Speed Sensor ] See Image Below.
15 Right rear ABS wheel speed sensor -G44- / Left rear ABS wheel speed sensor -G46- => [ Rear Wheel Speed Sensor ] See Image Below.
16 Wheel Hub with Wheel Bearing

Brake lamp switch






1 - Brake lamp switch -F-

ESP sensor unit






1 - Connector for ESP sensor unit -G419-

Front Wheel Speed Sensor






1 - Connector for the front wheel speed sensors

Rear Wheel Speed Sensor






1 - Rear wheel speed sensors