What is the reason for the continuous flashing of the electronic parking brake warning light?
2 Answers
The reason for the continuous flashing of the electronic parking brake warning light is a problem with the brake pads or signal light. It is recommended to use a car diagnostic tool to detect the specific issue before proceeding with repairs. Additional knowledge: 1. Working principle of cable-type electronic parking brake: When the driver presses and holds the electronic parking brake switch, the emergency braking function is activated. When the service brake is functioning normally, the ESP system (Electronic Stability Program) controls the service brake to apply braking force to all four wheels. If the service brake fails, the electronic parking brake control unit evaluates signals from the four-wheel speed sensors, applies braking force to the rear wheels, and prevents them from locking. In this case, the request to illuminate the brake light is sent by the electronic parking brake control unit. 2. Working principle of caliper-type electronic parking brake: When the driver pulls the electronic parking brake button, the parking brake control module motor located on the rear brake calipers starts rotating, applying braking force to the brake disc. At the same time, the traditional hydraulic brake also engages to make the braking response more agile. When the vehicle is parked, the driver can automatically release the parking brake by pressing the accelerator or brake pedal (applying a braking force of 10bar).
The flashing electronic parking brake warning light can be quite alarming. I've encountered this issue several times. The most common cause is low brake fluid level - the system triggers a warning when it detects insufficient fluid. Another possibility is a stuck parking brake actuator motor, especially in cold winter temperatures when the motor gears are prone to jamming, causing signal abnormalities. Wiring issues shouldn't be overlooked either - loose sensor connectors or short circuits in worn wiring harnesses can also activate the warning light. There might also be a control module malfunction, which requires professional diagnostic equipment to confirm through trouble codes. Before long trips, I always check the brake fluid dipstick first and top it up if the level approaches the minimum mark. When the light flashes, it's best to pull over safely and try resetting the system by repeatedly pressing the parking brake button. If that doesn't work, the safest option is to go directly to a repair shop to check the fuses and wiring harness.