ICU (Integrated Control Unit)

INTEGRATED CONTROL UNIT (ICU)

DESCRIPTION





The Hydraulic Control Unit (HCU) and the Controller Antilock Brake (CAB) used with this antilock brake system are combined (integrated) into one unit, which is called the Integrated Control Unit (ICU) (Fig. 20). The ICU is located below the air cleaner housing on the lower radiator support (Fig. 21).

The ICU on this vehicle can be the ABS only type or the ABS with traction control type, depending on how the vehicle is equipped.

The ABS only ICU consists of the following components: the CAB, eight (build/decay) solenoid valves (four inlet valves and four outlet valves), valve block, fluid accumulators, a pump, and an electric motor.

The ABS with traction control ICU consists of the following components: the CAB, eight (build/decay) solenoid valves (four inlet valves and four outlet valves), two traction control (ASR) valves, two hydraulic shuttle valves, valve block, fluid accumulators, a pump, and an electric motor.

The replaceable components of the ICU are the HCU and the CAB. No attempt should be made to service any individual components of the HCU or CAB.

OPERATION
For information of the ICU, refer to these individual components of the ICU:
^ CONTROLLER ANTILOCK BRAKE (CAB)
^ HYDRAULIC CONTROL UNIT (HCU)