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HOMESERVICE MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1154 (VEHICLE DYNAMIC SYSTEMS)DIAGNOSTIC TESTSANTI-LOCK CONTROL - TRACTION CONTROL AND STABILITY ASSISTPRINCIPLES OF OPERATIONABS WITH TRACTION CONTROL, ELECTRONIC STABILITY CONTROL (ESC) AND ROLL STABILITY CONTROL (RSC)ELECTRONIC STABILITY CONTROL (ESC)
2010 Mercury Mariner Hybrid, AWD

Electronic Stability Control (ESC)

2010 Mercury Mariner Hybrid, AWDSECTION Electronic Stability Control (ESC)
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

The electronic stability control (ESC) system constantly monitors the vehicle motion relative to the intended course. This is done by using sensors to compare the steering input and the yaw rate sensor with that of the actual vehicle motion. The ESC system monitors information from the throttle position (TP) sensor, the steering wheel rotation sensor (steering wheel angle and rate of change) and a yaw rate sensor (integral to the stability control sensor cluster) that measures changes in vehicle direction. If the ESC system determines from all these inputs that the vehicle is unable to travel in the intended direction, the system adjusts the brake torque at specific wheels in response to direct measurement of the vehicle motion and reduces engine torque to allow the vehicle to follow the intended course. The ESC system can be deactivated by pressing the stability/traction control switch in the instrument panel.

When the ESC system activates, any of the following can occur:

  • A rumble or grinding sound much like ABS or traction control
  • A small deceleration or a reduction in the acceleration of the vehicle
  • The roll stability control (RSC) indicator flashes
  • If the driver's foot is on the brake pedal, a vibration will be felt in the pedal much like ABS
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.