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 each front wheel hub and is serviced separately from the wheel hub.
• HCU  - which contains several valves (inlet, outlet, isolation and dump) and the hydraulic pump motor. It is mounted in the LF corner of the engine compartment and can be serviced separately.
• Rear wheel speed sensors - one sensor is located on each end of the rear axle housing. The sensors are serviced separately from the axle housing.
• Rear wheel speed sensor tone rings - one tone ring is located on each axle shaft and is serviced separately from the axle shaft.
• Restraints Control Module (RCM) - located under the rear of the front floor console and contains the yaw rate and lateral accelerometer sensors.
• Power Steering Control Module (PSCM) located in the steering gear, sends steering angle and rotation information to the ABS module.
• Stability/traction control switch - is part of the hazard flasher switch plate.