RSC: definition, function, principle of operation and causes of failure

RSC (Roll Stability Control) is a rollover protection system. It is installed on Ford, Land Rover, Lincoln and Volvo vehicles, mainly SUVs and crossovers. It first appeared in 2002. The system is an essential element of active safety systems and is often combined with stability control. It helps prevent road accidents by stabilizing the car during dynamic driving.

How RSC works

With the help of gyro sensors the RSC monitors both the speed and the angle of inclination of the body. As soon as this angle is classified as dangerous, the stability control switches on. The wheel in question is braked with ABS mechanisms. The torque of the engine is also limited. This reduces the centrifugal force exerted on the car and allows the car to return to its correct position on the road. This system improves safety when avoiding obstacles and negotiating tight corners.

Popular car models with RSC

  • Lincoln Aviator UN152, Navigator U326;
  • Ford Explorer III, Escape I, II, Edge Mk2, Kuga Mk2;
  • Volvo XC90 I, V90 II, XC60 I;
  • Land Rover Discovery 4, Freelander 2;
  • Mazda CX-9 TB.

Frequent reasons for defects

  • Incorrect readings from body position, yaw and ABS sensors.
  • ABS hydraulic unit solenoid valves failed due to coil winding damage.

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