Anti-Lock Brake System (ABS), Notes On Towing, Test And Repair Work - GF42.30-P-0003-07GG

Model 463 

• All electrical and hydraulic test work is described in the Diagnosis Manual, Chassis.

Towing 

There is a lack of servo assistance when the engine is not running.

Considerably higher forces are then required for braking and steering.

Handling ABS parts on vehicles following an accident 

If, due to the extent of the damage to the vehicle or the position and external appearance of the hydraulic unit after the accident, it can be seen that the hydraulic unit has received a heavy blow, it is to be replaced.

Indications of this are for example:

• Hydraulic lines kinked
• Connections on hydraulic unit leaking
• Electric cables or plug connections damaged
• Metal block of hydraulic unit shows signs of damage
• Hydraulic unit has sprung out of the mounting and cannot just be installed again

If this does not apply, the system must nevertheless be subjected to a thorough function check. The solenoid valves and pump must be checked using the corresponding test steps in the Diagnosis Manual.