Antilock Brakes / Traction Control Systems: Locations

Electrical/electronic components and installation locations





1- ABS hydraulic unit -N55
The hydraulic unit consists of the following components:
^ ABS hydraulic pump -V64-1)
^ Valve block (contains the inlet and outlet valves)
^ ABS hydraulic pump -V64- and valve block must not be separated from one another
^ When changing hydraulic unit, always seal old part with plugs from repair set Part No. 1 HO 698 311 A

CAUTION! Part numbers are listed here for reference only. Always check with your Parts department for the latest information.

2- ABS control module -J104
^ Checked by On Board Diagnostic (OBD)
^ Located on hydraulic unit in left side of engine compartment
^ Before disconnecting harness connector:
^ Check DTC memory.
^ Switch ignition off before separating harness connector.

3- ABS/EDL hydraulic unit -N55
The hydraulic unit consists of the components:
^ ABS hydraulic pump -V64-1)
^ Valve block (contains the inlet and outlet valves)
^ ABS hydraulic pump -V64- and valve block must not be separated from one another
^ When changing hydraulic unit, always seal old part with plugs from repair kit Part No. 1 HO 698 311 A

CAUTION! Part numbers are listed here for reference only. Always check with your Parts department for the latest information.

4- ABS/EDL and ABS/EDL/ASR control module -J104
^ Checked by On Board Diagnostic (OBD)
^ Located on hydraulic unit in left side of engine compartment
^ Before disconnecting harness connector:
- Check DTC memory.
- Switch ignition off before separating harness connector.





5- Brake light switch -F-
^ Open in rest position
^ Can be checked via Read Measuring Value Block
6- Data Link Connector (DLC)
^ Installation position- Current model (DLC) location is left of steering column, under the instrument panel. Early production is at the center console below heating/air conditioning controls.





7- ASR/ESP Control Lamp -K155- (only for vehicles with ASR)
8- Warning light for brake system -K118
9- ABS warning light -K47





10- ABS wheel speed sensors -G45-/-G47- (front)
^ Checked by On Board Diagnostic (OBD)
^ Before inserting sensor clean inner surface of sensor mounting and coat with lubricating paste G 000 650
^ When connecting wheel speed sensor wire make sure it is not twisted in wheel housing
^ Securing bolt tightening torque -10 Nm (7 ft lb)
11- Wheel hub with wheel speed sensors rotor (front)
12- ABS wheel speed sensor -G44-/-G46- (rear)
^ Checked by On Board Diagnostic (OBD)
13- Wheel hub with wheel speed sensor rotor (rear)