Vehicle Damage Warnings

Always observe the following when servicing ABS-equipped vehicles

Welding
Before using an electric welder, always remove the plug from the ABS control unit and remove the ground cable from the battery.

Painting
In the drying booth the ABS control unit should not be exposed to temperatures of more than 95°C for brief periods, or more than 85°C for longer periods (approx. 2 hours).

Battery Installation
If the battery has been removed, ensure that both cables are tight on their respective terminals during reinstallation.

Rear Axle Center Section
When replacing or servicing the rear axle center section, ensure that the drive gear for the wheel-speed sensor is the correct unit for the final-drive ratio.

Testing Operations
After any work in which components of the ABS have not been directly affected, the ABS malfunction indicator lamp in the instrument duster will provide an adequate check. After the engine starts, the malfunction indicator lamp should go out if the ABS unit is in order.
Operations in which no ABS components are directly affected include:
Exchange or replacement of
Brake Calipers,
Brake Pads,
Brake Hoses,
Brake Disks,
Brake Booster,
Tandem Master Cylinder,
Brake Cables,
Components Of The Parking Brake,
Brake Lines To The Rear Axle.

Operations in which ABS components are directly affected include:
After work on the
Hydraulic Unit
ABS Control Unit
Wiring Harness
Speed Sensors

Or replacement of component assemblies (for example in course of accident repairs).

The entire ABS must be tested with the available ABS test adapter and a multimeter.

The Bosch ABS tester ETT 016.00 is no longer suitable for performing the entire range of test procedures. Refer to Testing and Inspection for the most current testing procedures.

Handling Of ABS Parts On Vehicles Involved In Accidents
If it is apparent from the extent of damage to the vehicle or to the position and external appearance of the hydraulic unit after an accident, that the hydraulic unit has received a severe blow, it is to be replaced.
Symptoms of this are, for example:

^ Hydraulic lines kinked
^ Connections on hydraulic unit leaking
^ Electric cables or plug connectors damaged
^ The metal block of the hydraulic unit shows signs of damaged
^ The hydraulic unit has sprung out of its mounting and cannot be put back easily

Should this not be the case. the system must nevertheless be subject to a thorough function check and the test steps carried out for the solenoid valves and pump.