PT Cruiser L4-2.4L (2008)
Hydraulic Control Assembly - Antilock Brakes: Description and Operation
Integrated Control Unit (ICU)
Description
DESCRIPTION
The Hydraulic Control Unit (HCU) (2) and the Antilock Brake Module (ABM) (1) used with this antilock brake system are combined (integrated) into
one unit, which is called the Integrated Control Unit (ICU).
The ICU is located in the engine compartment, mounted to the left side body frame rail (1) right below the master cylinder (on left-hand-drive vehicles).
Two different ICU's are used on this vehicle depending on whether or not the vehicle is equipped with traction control. The HCU on a vehicle equipped
with traction control has a valve block that is approximately one inch longer than a HCU on a vehicle that is equipped with ABS only.
The ABS-only ICU consists of the following components: the ABM, 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 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.
