General Notes on Anti-Lock Braking System

General notes on anti-lock braking system (ABS)
The following variants of ABS are possible:
^ ABS
^ ABS/EDL
^ ABS/EDL with ASR
^ ABS/EDL/ASR with electronic stabilization program (ABS/EDL/ASR/ESP)

The ABS brake system is divided diagonally. The servo-assist is effected pneumatically, by the vacuum brake servo unit.

Malfunctions on the ABS influence the brake system and servo assistance. A braking behavior change should be checked. When the ABS warning lamp comes on, rear wheels can lock-up when braking!





ABS layout.





Hydraulic unit -a- and control module -b- are one unit and if malfunctions occur they should be replaced (apart from ABS/EDL/ASR/ESP Bosch 53).