Mitsubishi Outlander XL. Manual — part 1292

WHEN BRAKE FLUID PRESSURE IS INCREASED BY ABS

ZC600009

Master cylinder

0000

Wheel
cylinder

Low pressure
accumulator

Pump

Hydraulic unit

Motor

Wheel
cylinder

Suction damper

Outlet valve

Inlet valve

Outlet valve

Inlet valve
(with switched orifice)

Suction valve

Cut
valve

Pressure sensor

Brake fluid flow

Pressure relief valve

Damping
chamber

The system opens the inlet valve while closing the
outlet valve to increase the brake fluid pressure in the
wheel cylinder.

VALVE CONDITION

Item

Power status

Open/Close

Cut valve

OFF

Open

Suction valve

OFF

Closed

Inlet valve

OFF

Open

Outlet valve

OFF

Closed

35C-22

ACTIVE STABILITY CONTROL SYSTEM (ASC)

DESCRIPTION OF CONSTRUCTION AND OPERATION

When brake fluid pressure is increased by skid control (or increased by traction control)

ZC600010

Master cylinder

0000

Wheel
cylinder

Low pressure
accumulator

Pump

Hydraulic unit

Motor

Wheel
cylinder

Suction damper

Outlet valve

Inlet valve

Outlet valve

Inlet valve
(with switched orifice)

Suction valve

Cut
valve

Pressure sensor

Brake fluid flow

Brake fluid flow

Pressure relief valve

Damping
chamber

The system closes the cut valve to block the passage
from the pump outlet to the master cylinder, and
opens the suction valve, connecting the passage from

the master cylinder to the pump inlet. The brake fluid
from the master cylinder is supplied to the wheel
cylinder.

VALVE CONDITION

Item

Power status

Open/Close

Cut valve

ON

Closed

Suction valve

ON

Open

Inlet valve

OFF

Open

Outlet valve

OFF

Closed

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-23

DESCRIPTION OF CONSTRUCTION AND OPERATION

When brake fluid pressure is held by skid control (or held by traction control)

ZC600011

Master cylinder

0000

Wheel
cylinder

Low pressure
accumulator

Pump

Hydraulic unit

Motor

Wheel
cylinder

Suction damper

Outlet valve

Inlet valve

Outlet valve

Inlet valve
(with switched orifice)

Suction valve

Cut
valve

Pressure sensor

Brake fluid flow

Brake fluid flow

Brake fluid
flow

Brake fluid
flow

Pressure relief valve

Damping
chamber

The system closes the inlet valve and outlet valve to
hold the brake fluid pressure in the wheel cylinder.

The brake fluid pressurized by the pump returns to the
pump through the pressure relief valve in the cut
valve.

VALVE CONDITION

Item

Power status

Open/Close

Cut valve

ON

Closed

Suction valve

ON

Open

Inlet valve

ON

Closed

Outlet valve

OFF

Closed

35C-24

ACTIVE STABILITY CONTROL SYSTEM (ASC)

DESCRIPTION OF CONSTRUCTION AND OPERATION

When brake fluid pressure is decreased by skid control (or decreased by traction control)

ZC600012

Master cylinder

0000

Wheel
cylinder

Low pressure
accumulator

Pump

Hydraulic unit

Motor

Wheel
cylinder

Suction damper

Outlet valve

Inlet valve

Outlet valve

Inlet valve
(with switched orifice)

Suction valve

Cut
valve

Pressure sensor

Brake fluid flow

Brake fluid flow

Brake fluid flow

Damping
chamber

Pressure relief valve

Brake fluid flow

The system opens the outlet valve while closing the
inlet valve to store the brake fluid filled in the wheel
cylinder in the low pressure accumulator. The brake

fluid stored in the low pressure accumulator returns to
the master cylinder through the pressure relief valve
in the cut valve by driving the pump using the motor.

VALVE CONDITION

Item

Power status

Open/Close

Cut valve

ON

Closed

Suction valve

ON

Open

Inlet valve

ON

Closed

Outlet valve

ON

Open

TRACTION CONTROL OPERATION

The ASC-ECU receives various kinds of information
from the engine ECU, AWD-ECU, steering wheel
sensor, A/T-ECU, G and yaw rate sensor, and wheel
speed sensor. When the ASC-ECU determines that a

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-25

DESCRIPTION OF CONSTRUCTION AND OPERATION