Integrated Control Unit - MK25E: 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 below the master cylinder in the engine compartment. It is mounted to the left frame rail.

Fig 1: Integrated Control Unit

Courtesy of DAIMLERCHRYSLER CORP.

1 - ANTILOCK BRAKE MODULE (ABM)

2 - HYDRAULIC CONTROL UNIT (HCU)

3 - PUMP/MOTOR

The ABS ICU consists of the following components: the ABM, eight (build/decay) solenoid valves (four inlet valves and four outlet valves) and one hydraulic pump motor.

The ABS ICU with traction control consists of the following components: the ABM, eight (build/decay) solenoid valves (four inlet valves and four outlet valves), two master cylinder isolation valves, two low pressure feed valves and one hydraulic pump motor.

The replaceable components of the ICU are the HCU and the ABM. No attempt should be made to service any individual components of the HCU or ABM. For information on the ABM, (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/ANTILOCK BRAKE MODULE - DESCRIPTION) .