Notes For ABS System Repair

Notes for repair work on ABS

Notes:
^ Before carrying out repair work on the antilock braking system' determine the cause of the malfunction using "Guided fault finding". "Guided fault finding" is carried out on the vehicle diagnosis, testing and information system VAS 5051.
^ Disconnect battery ground strap with ignition switched off.
^ When working with brake fluid, observe safety precautions.
^ After working on an open brake system, bleed the brake system with brake fluid and bleeding unit VAS 5234.
^ During the final road test, make sure that a controlled brake test is performed at least once (pulsations must be felt at the brake pedal).
^ Absolute cleanliness is required when working on the anti-locking brake system. Do not use any products, which contain mineral oil, such as oils, greases etc.
^ Thoroughly clean all connections and the adjacent areas before loosening, do not use cleaning agents such as brake cleaner, gasoline, or thinners.
^ Place parts that have been removed on a clean surface and cover.
^ Cover or seal open components if repairs cannot be completed immediately. (Use sealing plugs repair kit 1 HO 693 311 A).
^ Do not use fluffy cloths.
^ Remove replacement parts from packaging immediately prior to installation.
^ Use genuine parts.
^ When the system is open do not work in areas with compressed air and do not move the vehicle.
^ 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 a maximum temperature of 85°C for longer periods of time (approximately 2 hours).