INTEGRATED CONTROL UNIT - MK25E
DESCRIPTION
NOTE: Later launch vehicles use the MK25E
Antilock Braking System (ABS). The MK25E ICU
can be easily identified by the brake tube ports on
two sides as shown instead of on one side as
used on previous systems.
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 (1) is located in the engine compartment,
mounted to a bracket that is attached to the right side
rail through the use of isolation grommets (2).
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 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/ANTILOCK
BRAKE MODULE - DESCRIPTION).
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BRAKES - ABS SERVICE INFORMATION
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