What is the cause of the ABS sensor failure in the front right wheel of the Audi A6L?
1 Answers
Audi A6L front right wheel ABS sensor failure may be caused by faults in the wheel speed sensor, ABS wiring, ABS pump, pressure regulating solenoid valve, ABS computer, and other components. How ABS works: During braking, ABS quickly determines the wheel lock-up state based on the speed signals from each wheel speed sensor, closes the normally open input solenoid valve on the wheel that is starting to lock, and keeps the braking force unchanged. If the wheel continues to lock, the normally closed output solenoid valve is opened, and the braking pressure on that wheel rapidly decreases due to the direct connection to the brake fluid reservoir, preventing the wheel from completely locking due to excessive braking force. This keeps the braking state at the optimal point (slip ratio S of 20%), achieving the best braking effect and the highest driving safety. The role of ABS: It maximizes the effectiveness of the brakes, shortening braking time and distance. It effectively prevents vehicle skidding and fishtailing during emergency braking, ensuring good driving stability. It allows steering during emergency braking, providing good steering control. It avoids severe friction between the tires and the ground, reducing tire wear.
