Mitsubishi Evolution X. Manual - part 49

AUTO-CRUISE CONTROL SYSTEM

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ENGINE AND EMISSION CONTROL

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SYSTEM FUNCTIONS

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SET FUNCTION

1. During driving with the vehicle speed range from 

approximately 40 to 200 km/h (25 to 125 mph), 
press and release the "COAST/SET" switch.

2. The vehicle speed when the "COAST/SET" switch 

is released is memorized. Thereafter, the constant 
speed driving is performed at that vehicle speed.

3. When the "COAST/SET" switch is operated 

during the driving with the vehicle speed of 
approximately 200 km/h (125 mph) or more, the 
constant speed driving will not be performed.

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COAST FUNCTION

1. When the "COAST/SET" switch is continuously 

pressed for approximately 0.5 second or longer 
during constant speed driving, the throttle valve 
becomes fully closed while the switch is pressed, 
and the vehicle is decelerated.

2. When the "COAST/SET" switch is released, the 

vehicle speed at that time is now memorized. 
Thereafter, the constant speed driving is 
performed at that vehicle speed.

3. Also when the "COAST/SET" switch is pressed 

for less than approximately 0.5 second, the 
vehicle is decelerated approximately 1.6 km/h (1 
mph) from the vehicle speed of constant speed 
driving, and the decelerated vehicle speed is now 
memorized. Thereafter, the constant speed 
driving is performed at that vehicle speed.

4. When the "COAST/SET" switch is continuously 

pressed and the vehicle speed is decelerated to 
approximately 40 km/h (25 mph) or less, the set 
function and coast function are cancelled, and the 
constant speed driving is cancelled.

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RESUME FUNCTION

1. When the "CANCEL" switch is pressed or the 

brake pedal is depressed during the constant 
speed driving, it cancels the constant speed 
driving.

2. Subsequently, when the "ACC/RES" switch is 

pressed during driving with the vehicle speed of 
approximately 40 km/h (25 mph) or more, the 
constant speed driving is performed with the 
vehicle speed memorized at the last cancellation 
of constant speed driving.

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ACCELERATOR FUNCTION

1. When the "ACC/RES" switch is continuously 

pressed for approximately 0.5 second or more 
during constant driving, it accelerates the vehicle 
with specified acceleration while the switch is 
pressed.

2. Then, when the "ACC/RES" switch is released, 

the vehicle speed at that time is now memorized. 
Thereafter, the constant speed driving is 
performed at that vehicle speed.

3. Also, when the "ACC/RES" switch is pressed for 

less than approximately 0.5 second, the vehicle is 
accelerated approximately 1.6 km/h (1 mph) from 
the vehicle speed of constant speed driving, and 
the accelerated vehicle speed is now memorized. 
Thereafter, the constant speed driving is 
performed at that vehicle speed.

4. It is possible to keep pressing the "ACC/RES" 

switch until the vehicle speed is accelerated to 
approximately 200 km/h (125 mph) or above. 
However, after the "ACC/RES" switch is released, 
the vehicle speed of approximately 200 km/h (125 
mph) becomes the newly memorized vehicle 
speed. Thereafter, the constant speed driving is 
performed at that speed.

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CANCEL FUNCTION

When any of the following conditions are satisfied, 
the constant speed driving will be cancelled.

• The cruise control system is stopped by the 

pressing the "ON OFF" switch.

• The "CANCEL" switch is pressed.

• The brake pedal is depressed.

• The clutch pedal is depressed <M/T>.

• The shift lever is shifted to the "N" position 

<TC-SST>.

• TC-SST drive mode is set to the "SPORT" mode 

and "S-SPORT" mode <TC-SST>.

• The vehicle speed becomes approximately 40 

km/h (25 mph) or less. 

• The vehicle speed is reduced approximately 15 

km/h (9 mph) or more from the speed at which 
the constant speed driving was started.

• An abnormality occurs in the vehicle speed sig-

nal.

• The engine coolant temperature becomes abnor-

mally high.

• The ASC is operated.

• An abnormality occurs to the ECM.

• An abnormality occurs to the TC-SST-ECU 

<TC-SST>.

• An abnormality occurs to the CAN communica-

tion.

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

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FAIL-SAFE FUNCTION

When any of the following conditions are satisfied, 
the cruise control system function is stopped until the 
system returns to normal. Also, when any of the con-
ditions are satisfied during the constant speed driv-
ing, the constant speed driving is cancelled 
immediately.

• An abnormality occurs to the cruise control 

switch.

• An abnormality occurs to the stoplight switch.

When any of the following conditions are satisfied, 
stop the vehicle once and turn the ignition switch to 
"LOCK" (OFF). Otherwise, even when the system 
returns to normal, the cruise control system function 
will continue to be stopped. Also, when any of the 
conditions are satisfied during the constant speed 
driving, the constant speed driving is cancelled 
immediately.

• ECM abnormality

• Vehicle speed signal abnormality

• TP sensor abnormality

• APP sensor abnormality

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DIAGNOSIS FUNCTION

• The diagnostic trouble code check is possible 

with the "CRUISE" indicator light.

• To facilitate the system check, check the service 

data output with the scan tool.

NOTE: For diagnostic items, service data output 
items, and check method, refer to the Service Man-
ual.

EMISSION CONTROL

GENERAL INFORMATION

M2171000101295

The following changes have been made to the con-
trols of the 2.0L engine provided on the LANCER 
EVOLUTION-IX.

Improvement / Additions

Remark

Rear exhaust system is applied.

Performance of exhaust gas after-treatment right 
after engine starts is improved due to early warm up.

Exhaust gas recirculation (EGR) system is 
discontinued.

System is simplified.

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

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SYSTEM CONFIGURATION DIAGRAM

AK703841

Fuel level
sensor

Evaporative emission
purge solenoid

Fuel tank
temperature
sensor

Fuel tank differential
pressure sensor

Fuel pressure
regulator

Heated oxygen sensor (rear)

Heated oxygen
sensor (front)

Fuel pump

Fuel tank

Evaporative
emission
canister

Evaporative emission
ventilation solenoid

AB

Check valve

Positive
crankcase
ventilation
valve

Three-way
catalytic converter

EMISSION CONTROL

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ENGINE AND EMISSION CONTROL

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Exhaust gas cleaning devices list

System

Objective / Function

Composition parts

Crankcase ventilation system

HC decrease
Re-combustion of blow-by gas.

Positive crankcase ventilation 
(PCV) valve

Evaporative emission control 
system

HC decrease
Re-combustion of fuel vapor gas.

• Canister

• Evaporative emission purge 

solenoid

Emission 
reduction 
systems

Air-fuel ratio 
feedback control

Decrease of CO, HC and NOx
Controls air-fuel ratio of air-fuel 
mixture to become theoretical 
air-fuel ratio (about 14.7), which is 
when the 3-way catalytic 
converter's cleaning performance 
is best. It also controls optimum 
fuel supply based on coolant 
temperature, driving conditions 
etc.

• ECM

• Mass airflow sensor

• Injectors

• Heated oxygen sensor

• Crankshaft position sensor etc.

Catalytic 
converter

Decrease of CO, HC and NOx
It facilitates oxidation of CO and 
HC and reduction of NOx so that 
all 3 component gases are 
cleaned simultaneously.

Monolith catalyst