Components Description - SSANGYONG Kyron Repair Manual

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7. COMPONENTS DESCRIPTION

1) HECU (Hydraulic & Electronic Control Unit)
1. Motor pump
The motor is operated when ABS is
activated. The cam-shaped output
shaft of the motor (a) enables the
brake system to receive and supply
the brake fluid during the motor
operation.
3. ECU (Including Solenoid Valves)
HECU controls the hydraulic valves by supplying or cut-
ting off the voltage to solenoid valves depending on the
wheel speed and other information from wheel speed
sensors. The ABS ECU has 6 solenoid valves. It has
three channels; 2 channels for front wheels and 1 chan-
nel for rear wheels Each channel has one inlet and one
outlet valve, therefore, there are six solenoid valves.
Main functions are
1) Overall control of ABS functions
2) Monitoring of ABS electric components
3) Diagnosis function support
ABS/ESP SYSTEM
KYRON SM - 2005.09
This section is provided only for the understanding of
HECU. Note that this component cannot be disas-
sembled for repair and maintenance. HECU consists of
motor pump, valve body, solenoid valve and ECU.
ECU connector has 47 pins and the number of valves in
valve body is 6 when equipped with only ABS and 12
when equipped with ESP system.
2. Valve body
The cam bushing (c) is installed be-
tween plungers (b) and it draws and
discharges the brake fluid.
<ECU lower cover>
The electrical components are weak to moisture. To pro-
tect ECU, Gore Tex-based plate is used at ECU lower
cover. The vent hall (arrow) allows air to ventilate but
does not allow moisture to penetrate.
<Pumping>
When the cam pushes the left plunger
during motor operation, the system
pressure is generated in the left
cylinder. At this time, the right
plunger is expanded by spring force
and the expanded volume of the right
cylinder draws the brake fluid.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN