ICU (Integrated Control Unit): Description

The Hydraulic Control Unit (HCU) and the Antilock Brake Module (ABM) 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 in the engine compartment below the air cleaner housing on the lower radiator support.

Fig 1: Integrated Control Unit

Courtesy of DAIMLERCHRYSLER CORP.

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

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

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