ESR (Electronic Wheel-Slip Reduction) is an electronic traction control system , which is used on SEAT models. It works together with the ABS and other driver assistance systems and is active at speeds below 40 km/h. The system improves the vehicle's stability, maneuverability and driving dynamics on slippery surfaces.
How ESR works
The ABS sensors measure the speed at which the wheels are turning. As soon as one of them starts to slide, the system slows it down. To do this, the pressure in the corresponding brake circuit is increased by the pumps and magnets of the ABS hydraulic unit. This reduces the torque of the wheel, restoring traction.
Popular SEAT models with ESR
- Ibiza 6J8 , 6P8, KJ1
- Leon 5F1, 5F5, 5F8, and
- Toledo 5P2, KG3
- Alhambra 710, 711
- Ateca KH7 .
Causes of defects
- ABS wheel speed sensor defects
- Lower Brake fluid level
- Uneven pressure in the tires
- Failure of the brake pedal position sensor.