ABS With AdvanceTrac®: Notes

The ABS with AdvanceTrac® consists of the following components:

• ABS module - attached to the Hydraulic Control Unit (HCU), but can be serviced separately.
• Brake booster vacuum sensor - located in the brake booster and can be serviced separately from the booster. Refer to POWER BRAKE SYSTEM ACTUATION .
• 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 in each wheel bearing and wheel hub assembly and is serviced with the wheel bearing and wheel hub. Refer to FRONT SUSPENSION - REAR WHEEL DRIVE (RWD) or FRONT SUSPENSION - FOUR WHEEL DRIVE (4WD) .
• HCU  - contains several valves (inlet, outlet, isolation and dump) and the hydraulic pump motor. It 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 in each wheel bearing and wheel hub assembly and is serviced with the wheel bearing and wheel hub. Refer to REAR SUSPENSION .
• Restraints Control Module (RCM) - located under the front floor console and contains several sensors (yaw rate, roll rate, lateral and longitudinal accelerometers).
• Steering wheel rotation sensor - located at the end of the steering column on the LH side of the column, the slotted wheel is serviced with the steering column.
• Stability/traction control switch - part of the power liftgate/traction control/hazard center stack switch assembly located in the instrument panel finish panel. The switch assembly is serviced separately from the finish panel.