Mitsubishi Evolution X. Manual — part 48

ENGINE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-2

ENGINE CONTROL

GENERAL INFORMATION

M2170001000905

For the accelerator system, an electronic throttle
valve control system has been adopted, disposing of
an accelerator cable. This system detects the accel-
erator pedal travel by using a accelerator pedal posi-
tion sensor (APS) in the accelerator pedal assembly
for electronic control of the throttle valve angle.

To the arm of accelerator pedal assembly, a resin
arm is employed in order to reduce weight.
Also, the aluminum pedal pad has been adopted to
enhance the sporty image.

CONSTRUCTION DIAGRAM

AC613376AB

Accelerator pedal assembly
[Built-in accelerator pedal position
sensor (APS)]

Resin arm

Aluminum pedal pad

AUTO-CRUISE CONTROL SYSTEM

TSB Revision

ENGINE AND EMISSION CONTROL

17-3

AUTO-CRUISE CONTROL SYSTEM

GENERAL INFORMATION

M2170001000897

By using the cruise control system, the driver can
drive at preferred speeds in a range of approximately
40 to 200 km/h (25 to 125 mph) without depressing
the accelerator pedal.

For this cruise control system, in conjunction with the
electronic throttle valve control system, the engine
control module (ECM) electronically controls the
throttle valve.

CONSTRUCTION DIAGRAM

AC708691

AC708693

AC708696

AC708692

CANCEL

ACC

RES

ON

OFF

COAST

SET

AC708694

AC708695

Cruise control switch

Data link connector

Hood
lock
release
handle

AB

Clutch switch <M/T>

Stoplight switch

Accelerator pedal
[Built-in accelerator
pedal position sensor
(APP sensor)]

Engine control
module (ECM)

"CRUISE" indicator light

Transaxle assembly
[Built-in twin clutch
-sportronic shift
transmission-ECU
(TC-SST-ECU)]
<TC-SST>

Throttle body
[Built-in throttle position sensor
(TP sensor) and
throttle actuator control motor
(TAC motor)]

Hydraulic unit Assembly
(Built-in ASC-ECU)

Shift lever assembly
(Built-in shift lever ECU)
<TC-SST>

Steering wheel

AUTO-CRUISE CONTROL SYSTEM

TSB Revision

ENGINE AND EMISSION CONTROL

17-4

COMPONENTS AND FUNCTIONS

Component

Function

Accelerator pedal position sensor (APP sensor)

Informs the ECM of the accelerator pedal
depression.

ASC-ECU

• Outputs the cruise control cancel signal to ECM.

• The vehicle speed signal is sent to the ECM.

Clutch switch <M/T>

Because the constant speed driving is cancelled by
the clutch operation, the clutch pedal status is
detected.

"CRUISE" indicator light

• The light is included in the combination meter and

illuminates when the "ON/OFF" switch is pressed
(cruise control system: ON).

• Depending on the flashing status of indicator light,

it displays the diagnostic trouble code signal of
cruise control system.

Cruise control switch

"ON/OFF" switch

Power switch for cruise control system.

"ACC/RES" switch

Vehicle speed is set with the "ACC/RES" switch and
"COAST/SET" switch.

"COAST/SET" switch
"CANCEL" switch

Cancels the cruise speed setting.

Data link connector

If the scan tool is connected, the input check code
from the ECM can be read.

Engine control module (ECM)

• Based on the input signal from each sensor and

switch, it outputs the target throttle valve opening
angle signal to the TAC motor.

• Based on the input signal from each sensor and

switch, it outputs the shift control signal to the
TC-SST-ECU <TC-SST>.

• Based on the vehicle speed signal from the

ASC-ECU, it calculates the vehicle speed.

• Based on the shift lever "N" position signal of the

shift lever ECU from the TC-SST-ECU, it cancels
constant speed driving <TC-SST>.

• Outputs the ON/OFF signals of "CRUISE"

indicator light and cruise control system.

• The diagnostic trouble code signal is sent to the

"CRUISE" indicator light.

• The input check code is sent to the data link

connector.

Shift lever ECU <TC-SST>

Because the constant speed driving is cancelled by
the shift lever operation, it detects the "N" position.

Stoplight switch

• Because the constant speed driving is canceled

by the brake operation, it detects the brake pedal
status.

• As for the stoplight switch, two built-in switches,

the stoplight switch which is also used for the
stoplight illumination and the brake switch which
is used exclusively for the cruise control, are
integrated, and thus the reliability is enhanced.

AUTO-CRUISE CONTROL SYSTEM

TSB Revision

ENGINE AND EMISSION CONTROL

17-5

CONSTRUCTION AND OPERATION

M2170002000403

SYSTEM OUTLINE

The cruise control section in ECM calculates the
cruise control system operation status based on the
signals sent from switches and sensors.Based on
the calculation, the cruise control section outputs the
target accelerator pedal opening angle signal to the
engine control section, and shift control signal to
TC-SST-ECU <TC-SST>, and "CRUISE" indicator
light ON/OFF signal to the combination meter.

In the engine control section, the target accelerator
pedal opening angle value is calculated based on the
target accelerator pedal opening angle signal from
the cruise control section, actual accelerator pedal
opening angle signal from the APP sensor, and the
throttle valve opening angle signal from the TP sen-
sor, and the vehicle speed is controlled by the driving
of TAC motor.

BLOCK DIAGRAM

Throttle actuator control motor (TAC motor)

The throttle valve opens and closes in response to
the target throttle valve opening angle signal from
the ECM.

Throttle position sensor (TP sensor)

Informs the ECM of the throttle valve opening angle.

Twin clutch-sportronic shift transmission-ECU
(TC-SST-ECU)

• Based on the transaxle control signal from the

ECM, it controls the transaxle.

• Transmits the shift lever "N" position signal from

the shift lever ECU sent to the ECM.

• TC-SST drive mode signal from the shift lever

ECU sent to the ECM.

Component

Function

AC708697

TAC motor

Target accelerator pedal
opening angle signal

Engine control section

Cruise control section

"CRUISE" indicator light

Actual
accelerator
pedal opening
angle signal

Target
throttle
valve
opening
angle
signal

Cruise control switch

ECM

"CRUISE"
indicator
light
ON/OFF
signal

APP sensor

Shift
lever
position
signal

Shift
control
signal

Cruise
control
switch
ON/OFF
signal

Shift lever-ECU <TC-SST>

Shift
lever
position
signal

TC-SST-ECU <TC-SST>

Vehicle
speed
signal

Cruise
control
cancel
signal

ASC-ECU

TP sensor

Throttle
valve
opening
angle
signal

Stoplight
switch
signal

Brake
switch
signal

Clutch
switch
signal

Stoplight switch

Clutch switch <M/T>

TC-SST
drive
mode
signal

TC-SST
drive
mode
signal