ABS With Traction Control and Electronic Stability Control (ESC): Notes

The ABS with traction control and Electronic Stability Control (ESC) consists of the following components:

• ABS module - attached to the Hydraulic Control Unit (HCU), but can be serviced separately.
• Front wheel speed sensors - one sensor is located in each front wheel knuckle. The sensors are serviced separately from the knuckle.
• Front wheel speed sensor tone rings - one tone ring is located on the outer CV joint of each halfshaft and is serviced with the halfshaft.
• HCU  - which contains several valves (inlet, outlet, isolation and dump), the hydraulic pump motor and is mounted behind the battery and battery tray.
• Rear wheel speed sensors - one sensor is located in each rear wheel knuckle, the sensors are serviced separately from the knuckle.
• Rear wheel speed sensor tone rings - one tone ring is located on the outer CV joint of each halfshaft and is serviced with the halfshaft.
• Stability control sensor cluster - located under the rear of the front floor console and contains several sensors (yaw rate, roll rate, lateral accelerometer and longitudinal accelerometer).
• Steering wheel rotation sensor - located on the RH side of the clock spring and is serviced separately from the clock spring assembly.
• Stability/traction control switch - depending on vehicle options, the switch is located in the Front Controls Interface Module (FCIM) (and is serviced with the module) or the HVAC module (and is serviced with the module).