Repair Information

Repair Information

• Before carrying out repairs to the ABS system, determine the cause of the malfunction using "Guided Fault Finding".

Perform "Guided Fault Finding" using vehicle diagnosis, testing and information system (VAS 5051).

• Disconnect battery ground (GND) strap before working on ABS. Note radio code (for vehicles equipped with coded anti-theft radio).

• Before carrying out welding work with an electric welding unit, disconnect the ABS control module.

• When working with brake fluid, observe safety precautions and notes, => [ Brake System Bleeding General Information ] Brake System Bleeding General Information.

• After finishing any work that required opening the brake system, bleed the brake system using the brake charger/bleeder unit ( VAS 5234), => [ Brake System Bleeding General Information ] Brake System Bleeding General Information.

• During final road test, carry out at least one ABS controlled braking operation (pulsations must be felt at brake pedal).

• Absolute cleanliness is required when working on the antilock brake system. Do not use any products which contain mineral oil, such as oils, greases etc.

• Thoroughly clean all unions and the adjacent areas before loosening. Do not use aggressive cleaning agents such as brake cleaner, fuel, thinners or similar chemicals.

• Place parts that have been removed on a clean surface and cover.

• Carefully cover opened components or seal, if repairs are not carried out immediately. (Use sealing plug (1H0 698 311 A))

• Only use lint-free cloths.

• Only unpack replacement parts immediately prior to installation.

• Only use parts in their original packing.

• Do not work with compressed air and do not move vehicle while the system is open.

• Make sure that brake fluid does not enter harness connectors.

• When painting, electronic control module can be exposed to a maximum temperature of. 95° C only briefly, and to a maximum of 85° C for longer periods (approximately 2 hours).