Anti-Lock Braking System (Abs) Repair Information
WARNING: This page is about a different car, the 2022 Audi SQ5, 2021 Audi S4, and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The brake system is divided by the axle on this vehicle.
Right and left front axle
Right and left rear axle
ABS malfunctions do not affect the brake system and the booster. The conventional brake system remains operative even without ABS. A change in braking behavior should be checked. When the ABS indicator lamp comes on, the rear wheels can lock up early when braking.
WARNING:
- The ABS is generally maintenance-free.
- Testing, assembly, and repair work may only be performed by qualified personnel.
- By not observing the points described in the Service Information, the system can be damaged and vehicle safety could be compromised.
- Before servicing the ABS system, determine the cause of the damage using OBD.
- Disconnect the battery ground cable when the ignition is switched off.
- When handling brake fluid, observe the relevant safety precautions and notes. Refer to BRAKE FLUID GENERAL INFORMATION .
- Bleed the brake system with the Brake Charger/Bleeder Unit :VAS5234 for all work that requires opening the hydraulic system. High and low pressure testing should also be performed on the brake system.
- During the final road test, make sure that a ABS-controlled brake test is performed at least once (pulsation must be felt at the brake pedal).