Procedures

Bleeding Brake System

• If the old ACC pressure sensor (1J0...) is installed, then will not be possible to bleed the brake system completely. Replace the old version ACC pressure sensor with a new version sensor.

• Brake Pressure Sensor 1, Removing and Installing, refer to => [ Brake Pressure Sensors ] Service and Repair

CAUTION!
• Do not, under any circumstances, allow brake fluid to come into contact with any fluids containing mineral oil (oil, gasoline, cleaning solvents). Mineral oil damages the sealing plugs and boots of the brake system.

• Brake fluid is poisonous. NEVER siphon brake fluid with your mouth! Also due to its corrosive effect, brake fluid must not come into contact with paintwork.

• Brake fluid is hygroscopic, meaning that it absorbs moisture from the surrounding air, and must therefore be stored in air-tight containers.

• When bleeding, brake fluid that has been flushed through must not be reused and must be disposed of properly.

• Observe disposal regulations, refer to => [ Brake Fluid ] Description and Operation.

• Only use new brake fluid conforming to US-Norm FMVSS 116 DOT 4.

• Genuine VW/Audi brake fluid conforms to this specification.

• Do not use any silicone-based fluid.

• Avoid contaminating brake fluid with particles or lint (e.g. from cleaning cloths).

• Rinse off spills, by using plenty of water.

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

• During the final road test, ensure that a ABS-controlled brake test is performed at least once (pulsation must be felt at the brake pedal).

• The brake system indicator light blinks when the brake fluid is too low or the ABS system or parking brake is malfunctioning.