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Mitsubishi Evolution X. Manual - part 66

TECHNICAL FEATURES

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GENERAL

00-14

FEATURES

IMPROVED BRAKING PERFORMANCE

• In addition to the 10-inch through bolt type single

brake booster, the small and long stroke-type
master cylinder is adopted to provide rigidity, to
reduce weight, and to secure the assist force.

• Brembo™ 18-inch 4-pot front ventilated disc

brakes and Brembo

™ 17-inch 2-pot rear venti-

lated disc brakes are adopted to provide stable
braking force and improved braking feel.

• To the front, two-piece structure brake disk is

installed. <GSR: Option, MR: Standard>

IMPROVED STABILITY

• Front- and rear-wheel X-type brake line layout is

used.

• The brake pedal retreat suppression mechanism

that suppresses the retraction of brake pedal sur-
face upon a frontal collision is adopted.

• To the front brake and rear brake, the brake pads

with audible wear indicator are adopted which
warn the driver of the wear limit.

ACTIVE SAFETY

M2000031000959

ACTIVE SKID CONTROL SYSTEM (ASC)

AC709630

CHECK

SERVICE
REQUIRED

7, 8, 9, 22

TECHNICAL FEATURES

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GENERAL

00-15

MAIN COMPONENTS AND FUNCTIONS

Parts name

No. Functional description

Sensor

Wheel speed
sensor

Outputs the frequency pulse signal in proportion to the rotation speed of
each wheel to ASC-ECU.

Magnetic encoder
for wheel speed
detection

When the magnetic encoder for wheel speed detection (a plate on which
north and south pole sides of the magnets are arranged alternately)
rotates, the wheel speed sensor outputs frequency pulse signal in
proportion to each wheel speed.

Stop light switch

Outputs the signal indicating whether the brake pedal is depressed or
not to ASC-ECU.

G and yaw rate
sensor

Detects the yaw rate and longitudinal/lateral acceleration of a vehicle,
then outputs the signal to ASC-ECU via the CAN line.

Steering wheel
sensor

Detects the steering angle of steering wheel, and outputs the signal to
ASC-ECU via the CAN bus line.

Master cylinder
pressure sensor

Integrated into the hydraulic unit, converts the signal of brake fluid
pressure in master cylinder to the voltage value, then outputs the value
to ASC-ECU.

Wheel cylinder
pressure sensor

Integrated into the hydraulic unit, converts the signal of brake fluid
pressure in wheel cylinder of each wheel to the voltage value, then
outputs the value to ASC-ECU.

Actuator Hydraulic unit

Drives the solenoid valve using the signal from ASC-ECU, and controls
the brake fluid pressure for each wheel.

ABS warning light 9

Informs the driver of the system status by illuminating, flashing, or
turning off the warning light according to the signal from ASC-ECU.

ABS warning
display

Informs the driver of the system status by illuminating or turning off the
warning light according to the signal from ASC-ECU.

Brake warning
light

Used as the warning light for the parking brake, brake fluid level, and
EBD control. Informs the driver of the system status by illuminating or
turning off the warning light according to the signal from ASC-ECU.

Brake warning
display

Used as the warning light for the brake fluid level and EBD control.
Informs the driver of the system status by illuminating or turning off the
warning light according to the signal from ASC-ECU.

Data link connector

Outputs the diagnostic trouble code and establishes the communication
with the scan tool.

ASC control unit (ASC-ECU) 14

Controls the actuators (described above) based on the signals coming
from each sensors.
Controls the self-diagnostic functions and fail-safe functions.
Controls diagnostic function (Compatible with scan tool).

TECHNICAL FEATURES

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GENERAL

00-16

SYSTEM CONFIGURATION

The transaxle <twin clutch sportronic shift transmis-
sion (TC-SST)

> control and AWD <super all wheel

control (S-AWC)

> control have been added to the

conventional brake control and engine output control,
and the controls are integrated. The vehicle stability
has been improved with the equipped ASC.

• The ASC system integrates the traction control

(TCL) function and skid control function.

• When TCL function detects the slip of driving

wheel (for example, during startup on slippery
road), it automatically applies the braking force to
the slipping driving wheel. At the same time, TCL
function reduces the engine output and prevents
the wheel spin when it determines that the engine
torque is too high for the road surface friction
coefficient.

• When the skid control function determines that

the vehicle is in a dangerous state, it reduces the
engine output and applies brake force to four
wheels independently to control the vehicle
behavior, avoiding the critical state.

• Brake performance at ASC system failure is

ensured by the fail-safe function, and at the same
time, the serviceability during service is
improved.

NOTE:

•

: For the details on twin clutch sportronic shift

transmission (TC-SST), refer to GROUP 22B

−

Twin Clutch Sportronic Shift Transmission
(TC-SST)

P.22B-2

•

: For the details on super all wheel control

(S-AWC), refer to GROUP 22B

−

Super All Wheel

Control (S-AWC)

P.22B-18

•

The active skid control (ASC) has the traction
control function and the skid control function. By
the integrated control with the anti-lock brake
system, the system stabilizes the vehicle attitude
and, at the same time, secures the driving force.

FOUR-WHEEL ANTI-LOCK BRAKE
SYSTEM (4 ABS)

The ABS (with EBD and brake assist) that ensures
directional stability and controllability during hard
braking has been equipped to GSR.
This ABS employs a 4-sensor system that indepen-
dently controls the right and left wheels of front and
rear, and has the following features:

• EBD

(Electronic Brake-force Distribution sys-

tem) control that can provide ideal rear wheel
brake force has been employed.

• The magnetic encoder for wheel speed detection

has been installed instead of the rotor as the
wheel speed sensor.

AC704103

ASC OFF switch

G&yaw rate sensor

Engine ECU

S-AWC-ECU

TC-SST-ECU

ASC-ECU

ETACS-ECU

Local CAN

CAN-C

CAN-B

Stop light switch

Combination meter

Steering wheel sensor

Wheel
speed
sensor
(RR)

Wheel
speed
sensor
(RL)

Wheel speed
sensor (FL)

Wheel speed
sensor (FR)

TECHNICAL FEATURES

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GENERAL

00-17

• For wiring harness saving and secure data com-

munication, CAN

bus has been adopted as a

tool of communication with another ECU.

NOTE:

•

: EBD (Electronic Brake-force Distribution)

•

: For more details on CAN (Controller Area Net-

work), refer to GROUP 54C

P.54C-2

•

As with the active skid control (ASC), ABS is con-
trolled by ASC-ECU.

PASSIVE SAFETY

M2000032001041

IMPACT SAFETY BODY RISE (REINFORCED IMPACT SAFETY EVOLUTION)

AB700981

AB700984AB

Content .. 64 65 66 67 ..