General Notes on Anti-Lock Braking System

The following variants of ABS are possible:
^ ABS
^ ABS/EDL
^ ABS/EDL with ASR
The ABS brake system is divided diagonally. The servo-assistance 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 Bosch 5.3).