2006 MITSUBISHI COLT Service Repair Manual

GROUP 17
ENGINE AND EMISSION
CONTROL
CONTENTS
ENGINE CONTROL . . . . . . . . . . . . . .17-2
ACCELERATOR SYSTEM . . . . . . . . . . . . . 17-2
EMISSION CONTROL . . . . . . . . . . . .17-3
GENERAL INFORMATION <4A9> . . . . . . . 17-3
GENERAL INFORMATION <4G1> . . . . . . . 17-4

ENGINE CONTROL
ENGINE AND EMISSION CONTROL17-2
ENGINE CONTROL
ACCELERATOR SYSTEMM2170003000310
For the accelerator system, an electronic throttle
valve control system has been adopted, eliminating
of an accelerator cable. This system detects the
amount of the accelerator pedal movement by using
a accelerator pedal-position sensor in the accelerator
pedal assembly for electronic control of the throttle
valve angle.
CONSTRUCTION DIAGRAM
AC206106
Accelerator pedal assembly
(Built-in accelerator pedal
position sensor)
Accelerator pedal
arm stopper
AD

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-3
EMISSION CONTROL
GENERAL INFORMATION <4A9>M2171000100838
Although the emission control systems are basically
the same as those of the 4G1-Non-Turbo engine
used in the COLT, the following improvements have
been added.•The adoption of the catalytic converter just
beneath exhaust manifold realizes the earlier
activation.
•The adoption of the dual oxygen sensor has
increased reliability air/fuel ratio control.
•
SystemRemarks
Crank case ventilaton systemClosed type
Evaporative emission control systemElectronic control type with duty signal
Exhaust gas recirculation (EGR) system Electronic control (stepper motor) type
Air/fuel ratio closed loop controlOxygen sensor signal used
Catalytic converterThree-way catalytic converter
The abolition of the EGR system .
EMISSION CONTROL SYSTEM DIAGRAM
AK402829
Oxygen sensor (front)
Oxygen sensor (rear)
Air
inlet
EGR valve
(stepper motor)
Canister
Purge control
solenoid valve
Injector
PCV valve
ACCatalytic converter From
fuel pump

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-4
GENERAL INFORMATION <4G1>
M2171000100849
Although the emission control systems are basically
the same as those of the 4G1-Non-Turbo engine
used in the COLT, the following improvements have
been added.
•The adoption of the catalytic converter just
beneath turbo charger and under the floor
increased the performance of the emission con
-
trols.
•The adoption of the check valve between the
purge control solenoid valve and the canister pro
-
tects the regurgitation as turbocharging.
•
SystemRemarks
Crank case ventilaton systemClosed type
Evaporative emission control systemElectronic control type with duty signal
Air/fuel ratio closed loop controlOxygen sensor signal used
Catalytic converterThree-way catalytic converter
The abolition of the EGR system
EMISSION CONTROL SYSTEM DIAGRAM
AK600530AB
Canister
Purge control
solenoid valve Fuel pressure control
solenoid valve
Check valve
Waste gate
solenoid valve Waste gate
actuator
Air
inlet
Catalytic
converter
Catalytic
converter Injector
From
fuel pump
Fuel pressure
regulator
To
fuel tank
Oxygen sensor
(front)
Oxygen sensor
(rear)