What is the wheel speed channel number for Volkswagen ABS?
1 Answers
Volkswagen ABS wheel speed channel number is 03-04-001. ABS working principle: During braking, ABS quickly determines the wheel lock state based on speed signals from each wheel speed sensor, closes the normally open input solenoid valve for the locking wheel to maintain constant braking force. If the wheel continues to lock, the normally closed output solenoid valve opens, causing the brake pressure on that wheel to rapidly decrease due to direct connection to the brake fluid reservoir, preventing complete wheel lockup from excessive braking force. This keeps braking at the optimal point (20% slip ratio S), achieving the best braking effect and maximum driving safety. ABS functions: Maximizes brake efficiency, reducing braking time and distance. Effectively prevents vehicle skidding and fishtailing during emergency braking, ensuring good driving stability. Allows steering during emergency braking, providing excellent steering control. Avoids severe friction between tires and road surface, reducing tire wear.