Ecu (Electronic Control Unit); Hydraulic Control Unit - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

8E2-18
ESP COMPONENTS
HECU (HYDRAULIC AND ELECTRONIC CONTROL UNIT)
Brake pressure
Reference speed
Mote pump
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
The electronic control unit performs the following functions:
- controlling the ABS and ESP
- cotinuous monitoring of all electrical components
In the integrated control unit, the coils of the solenoid valves
are integrated into the control unit housing. The necessary
relays are mounted on the circuit board of the electronic con-
trol unit.
- yaw rate
- G sensor
- lateral/longitudinal acceleration
Y220_8E2021
- pressure in hydraulic system
- wheel speed
- reference speed
- deceleration
- slip
# ABS control
If during braking, one wheel speed deviates from the reference
speed, the ABS control unit attempts to correct that wheel by
Vehicle speed modulating the brake pressure until it again matches the ref-
erence speed. When all four wheels tend to lock, all four wheels
Wheel speed
speeds suddenly deviate from the previously determined ref-
erence speed. In that case, the control cycle is initiated again
in order to again correct the wheel speed by modulating the
brake pressure.
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The pump and the valve body are grouped together in one
housing, forming one compact unit with the electric motor.
Four pairs of valves (4 inlet valves, 4 outlet valves) are provided
for modulating the pressure at the wheels plus two isolating
valves and two electrically operated shuttle valves.
Valve body
Y220_8E2023

ECU (Electronic Control Unit)

Hydraulic Control Unit

ESP SYSTEM
REXTON SM - 2004.4