ICU - Integrated Control Unit: 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). See Fig 1. The ICU is located on the driver's side of the vehicle, below the master cylinder. See Fig 2.

Fig 1: Integrated Control Unit (ICU)

Courtesy of DAIMLERCHRYSLER CORP.

1 - PUMP/MOTOR

2 - HCU

3 - PUMP/MOTOR WIRING CONNECTOR

4 - CAB

Fig 2: Master Cylinder And ICU

Courtesy of DAIMLERCHRYSLER CORP.

1 - PRIMARY BRAKE TUBE

2 - MASTER CYLINDER

3 - SECONDARY BRAKE TUBE

4 - ABS ICU

The 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 pump/motor.

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

For additional information on the CAB, (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/CONTROLLER ANTILOCK BRAKE - DESCRIPTION) . For additional information on the HCU, (Refer to BRAKES - ABS/HYDRAULIC/MECHANICAL/HCU (HYDRAULIC CONTROL UNIT) - DESCRIPTION ).