Operation CHARM: Car repair manuals for everyone.

ABS/EDL General Information



ABS prevents the wheel from locking up during hard braking initiated by the driver.

The Electronic Differential Lock (EDL) is a traction control aid for driving away from a standstill. An electronically-controlled brake application at the wheel that is spinning provides a torque reaction point for the differential. This enables the wheel with better traction to make use of the engine power. EDL is effective in both forward and reverse. EDL regulations are performed up to a speed of 80 km/h.

The brake system is divided diagonally (two circuits). The vacuum brake booster unit boosts the brakes pneumatically.

Vehicles with this ABS system do not have a mechanical brake pressure regulator. A specially coordinated software program, Electronic Brake Distribution (EBD), in the control module determines brake pressure allocation at the rear axle.

The hydraulic unit consists of the ABS hydraulic pump -V64-, ABS hydraulic unit -N55-, and the ABS control module (w/EDL) -J104-. Maintenance can only be performed when removed from vehicle.

New control modules from the replacement part program are not coded. They must be coded following installation.