ESC

📖 YOUCANIC Automotive Glossary

ESC/ESP (Electronic Stability Control/Electronic Stability Program) prevents loss of vehicle control by detecting and reducing skidding during emergency maneuvers, slippery conditions, and oversteering/understeering situations. The system compares the driver’s intended direction (steering angle sensor input) with the vehicle’s actual movement (yaw rate sensor, lateral acceleration sensor, wheel speed sensors). When a mismatch is detected — meaning the vehicle is not going where the driver is steering — ESC selectively applies individual wheel brakes and may reduce engine torque to bring the vehicle back on the intended path.

ESC relies on accurate calibration of the steering angle sensor and yaw rate sensor. After alignment work, SAS calibration is required or ESC may intervene inappropriately. DTCs appear in the ABS/ESC module. The YOUCANIC UCAN-II provides SAS calibration, G Sensor Learn (yaw rate calibration), and ESC module diagnostics. Common causes of ESC warnings: uncalibrated steering angle sensor, faulty yaw rate sensor, and wheel speed sensor discrepancies.