Mitsubishi Outlander XL. Manual — part 1288

NOTE:

The dotted line indicates the CAN-bus line.

CONSTRUCTION DESCRIPTION

SENSOR

M23506100003USA0000010000

Wheel speed sensor

Refer to GROUP 35B, SENSOR P.35B-6.

G AND YAW RATE SENSOR

ZC3055990000

G&yaw rate sensor

This sensor is installed under the front floor console, and detects
the yaw rate, lateral and longitudinal acceleration (AWD) of the
vehicle. ABS employs the longitudinal acceleration.

STEERING WHEEL SENSOR

ZC6000060000

Steering wheel sensor

The steering wheel sensor is attached to the column switch, and
detects the rotational angle of the steering wheel.

ASC OFF SWITCH

ZC5019530000

ASC off switch

The ASC OFF switch is attached on the instrument panel to the
left side of the driver's seat. Traction control and skid control
functions can be deactivated by pressing this switch for 3
seconds or longer. Pressing this switch again resumes the active
state. Pressing the ASC OFF switch for 15 seconds resumes the
system to the active state, and the traction control and skid
control function cannot be turned off until the ignition switch is
turned on next time.
When the ignition switch is turned from "LOCK" (OFF) to ON
position, traction control and skid control functions are constantly
in the active state.

35C-6

ACTIVE STABILITY CONTROL SYSTEM (ASC)

CONSTRUCTION DESCRIPTION

ASC OFF switch operation and system operation

ASC OFF switch control Traction control function

Skid control function

Brake control

Engine control

ON

Enabled

Enabled

Enabled

OFF

Prohibited

Prohibited

Prohibited

NOTE:

The Skid control function is available when the

vehicle speed is about 15 km/h or more.

ACTUATOR

M23506100004USA0000010000

HYDRAULIC UNIT
The hydraulic unit incorporates the ABS and ASC.
The cut valve, pressure relief valve, suction valve,

suction damper, and pressure sensor have been
added to the unit for the ASC.

NOTE:

For the internal hydraulic circuit of the

hydraulic unit, refer to P.35C-6.

ASC OPERATION INDICATOR LAMP, ASC OFF INDICATOR LAMP
The ASC system illuminates or flashes the ASC
operation indicator light or ASC OFF indicator light in
the following operation patterns, and informs the
driver of the ASC system status.

ASC operation indicator light

｠

Flashes in 2 Hz during the skid control.

｠

Flashes in 2 Hz during the traction control.

｠

Turns ON when the system malfunction occurs.

ASC OFF indicator light

｠

ASC-ECU detects the overheat of the brake pads.
When the brake traction control is prohibited, the
ASC OFF indicator light flashes in approximately 2
Hz.

｠

Turns ON when the system malfunction occurs.

｠

Turns ON when the ASC OFF switch is pressed for
3 seconds or more, and the traction control function
and the skid control function are disabled.

ASC operation indicator light, ASC OFF indicator light illumination and flashing patterns

State

ASC operation indicator light

ASC OFF indicator light

Normal

Normal

-

-

Skid

control

function

operated

Flashing (2 Hz)

-

Traction control function
operated

Flashing (2 Hz)

-

Brake traction control
function does not function
to protect brake system.

-

Flashing (2 Hz)

Abnorm
al

Skid

control

function

malfunction

ON

ON

Traction control function
malfunction

ON

ON

Scan
tool
connecti
on

Actuator not operated

-

-

Actuator operated

ON (After the actuator is
operated)*1

ON (After the actuator is
operated)*1

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-7

CONSTRUCTION DESCRIPTION

State

ASC operation indicator light

ASC OFF indicator light

OFF (When the actuator is
operating)*2

OFF (When the actuator is
operating)*2

NOTE:

｠

*1After the actuator is operated, the light stays
illuminated until the ignition switch is turned to the
"LOCK" (OFF) position.

｠

*2The ABS warning light flashes (2 Hz) while the
actuator is operating.

ASC-ECU

M23506100005USA0000010000

This ECU incorporates the ABS function, EBD
function, Skid control function, and Traction control
function.

SYSTEM CONFIGURATION
The hydraulic units of the ASC employ the automatic
pressurization

function.

ASC

systems

also

incorporate G and yaw rate sensor, steering wheel
sensor, and master cylinder pressure sensor
(integrated with hydraulic unit).

CONTROL DESCRIPTION
ASC-ECU detects vehicle movement based on
information from various sensors and calculates a
model of ideal vehicle movement. ASC-ECU
compares the actual vehicle movement with the ideal
vehicle model, and manages the brake of the specific
wheel so that the actual vehicle movement gets close
to the ideal vehicle mode. It also controls the plowing
out or spinning out condition by creating the yaw
moment in the vehicle.

Example of Active Skid Control operation

ZC600705

<Generation of rotating force>

<Generation of counter-rotating force>

0000

Large braking
force

Large braking
force

The Skid Control manages the vehicle attitude by
creating a yaw moment from altering the balance
between the cornering force and each wheel's braking
mechanism.
For example, on a slippery surface, if the vehicle tends
to be plowing out contrary to the driver’s intention, a
yaw moment (a rotational moment) is created to

restrain the plowing out by increasing the rear-inside
braking force. On the other hand, when the vehicle
tends to be spinning out, a yaw moment (a restorative
moment) is created to restrain the spinning out by
increasing the front-outside wheel braking force.
Furthermore, when it is determined that the vehicle is
spinning out, safe and stable cornering is enabled by
deceleration from reducing the engine output.

35C-8

ACTIVE STABILITY CONTROL SYSTEM (ASC)

CONSTRUCTION DESCRIPTION

Example of the effect of control

AC204504

AC204505

AC204506

ZC600706

Suppression of plowing out

Suppression of spinning out

Improvement in ABS performance

Vehicle balance stable
after avoiding collision
with obstacles

Prevention of deviation
from the course by
understeer

Avoidance of spinning
by tacking in

0000

Joint control
Skid control function transmits data necessary for
control of ABS and traction control function,
performing joint control.

Control system

Control content

ABS

Even during skid control operation, ABS performance is improved from the
joint operation of the skid control.

Traction control function

During acceleration, engine output is governed through joint operation with
skid control function.

Example of traction control function

Traction control function applies the brake
automatically, sends the signal requesting engine
speed reduction to the engine ECU, and prevents the
loss of the driving force resulting from the slippage of

the driving wheel, when the driving wheels slip on the
slippery road surface.

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-9

CONSTRUCTION DESCRIPTION