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What are the causes of ESC system failure?

1 Answers

ClaireLee

07/24/25 7:03pm

When the ESC warning light illuminates, possible causes include: 1. Sensor failure: Malfunction in ESC system sensors such as yaw rate sensor, lateral acceleration sensor, or steering wheel angle sensor; 2. Wiring issues: Problems in system wiring including short circuits or open circuits; 3. Control unit failure: Malfunction in the control unit itself may also lead to ESC failure. Below is an introduction to the ESC system: 1. System function: ESC is an electronic vehicle stability control system and a supplementary system for driving safety, which helps avoid hazards. During rapid turns or lane changes when the vehicle becomes extremely unstable, it compensates for vehicle stability by applying wheel brakes or controlling engine torque. ESC is a vehicle stability system - continuous illumination indicates system failure, while flashing indicates active operation. 2. Components: The system consists of three main parts: sensors, electronic control unit (ECU), and actuators. The electronic control unit monitors vehicle operating conditions and intervenes in the engine and brake system control. A typical automotive electronic stability control system mainly includes four wheel speed sensors, steering wheel angle sensor, lateral acceleration sensor, yaw rate sensor, and brake master cylinder pressure sensor in its sensor array. The actuation part includes conventional brake systems (vacuum booster, pipelines, and brakes), hydraulic regulators, etc. The electronic control unit interacts with the engine management system to intervene and adjust engine power output.

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