What Causes the Hissing Sound When Braking?

[AdelineRose]

The hissing sound when braking is caused by a damaged vacuum booster. The components of the braking system include the vacuum booster, master cylinder, wheel cylinders, brake pads, and brake discs. The method to eliminate brake lock-up is to engage first gear or reverse gear and utilize the vehicle's power to resolve it. Causes of brake lock-up: 1. Absence of an ABS anti-lock braking system; 2. Prolonged vehicle inactivity leading to lock-up. The functions of the ABS anti-lock braking system are: 1. Enhancing brake performance, reducing braking time and distance; 2. Preventing vehicle skidding and fishtailing during emergency braking, ensuring good driving stability; 3. Allowing steering during emergency braking, maintaining good steering control; 4. Avoiding severe friction between tires and the ground, reducing tire wear. Reasons for the ABS light appearing on the dashboard: 1. Wheel speed sensor malfunction; 2. ABS wiring fault; 3. ABS pump or pressure regulating solenoid valve failure; 4. ABS computer malfunction.