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Why does the ABS light come on after vehicle inspection?

1 Answers

Henry

09/04/25 2:33am

The reasons why the ABS light comes on after vehicle inspection: Air in the system pipeline; computer system failure; vehicle speed sensor failure; ABS wiring harness breakage; poor contact of the ABS relay. How ABS works: During braking, the 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 begins to lock up, and keeps the braking force unchanged. If the wheel continues to lock up, the normally closed output solenoid valve is opened, and the braking pressure on this wheel rapidly decreases due to the pipeline directly connected to the brake fluid reservoir, preventing the wheel from completely locking up due to excessive braking force. This keeps the braking state always at the optimal point (slip rate S of 20%), achieving the best braking effect and the safest driving. The role of ABS: It maximizes the effectiveness of the brakes, shortening braking time and distance. It can effectively prevent 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.

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