Mitsubishi Galant (2004+). Manual - part 1744

FUEL INJECTION CONTROL

MULTIPORT FUEL SYSTEM (MFI) <3.8L ENGINE>

13B-5

FUEL INJECTION CONTROL

M2132003000293

The fuel injection control is basically the same as 
that for the 3.8L engine installed in the ENDEAVOR.

.

System Configuration Diagram

AK302859

INJECTOR

PCM

MASS AIRFLOW SENSOR

MANIFOLD ABSOLUTE PRESSURE 
(MAP) SENSOR

INTAKE AIR TEMPERATURE SENSOR

ENGINE COOLANT TEMPERATURE
SENSOR

THROTTLE POSITION SENSOR

CRANKSHAFT POSITION SENSOR

CAMSHAFT POSITION SENSOR

KNOCK SENSOR

IGNITION SWITCH-ST

HEATED OXYGEN SENSOR

AB

THROTTLE VALVE OPENING ANGLE CONTROL

MULTIPORT FUEL SYSTEM (MFI) <3.8L ENGINE>

13B-6

THROTTLE VALVE OPENING ANGLE CONTROL

M2132015000074

The throttle valve opening angle control is basically 
the same that for the 3.8L engine installed in the 
ENDEAVOR.

.

System Configuration Diagram

AK304205

THROTTLE
ACTUATOR
CONTROL
MOTOR

THROTTLE
POSITION
SENSOR

ACCELERATOR
PEDAL
POSITION
SENSOR

ENGINE 
CONTROL
UNIT

THROTTLE
VALVE
CONTROL
UNIT

PULSE WIDTH MODULATION
CONTROL

POWERTRAIN CONTROL MODULE

THROTTLE ACTUATOR
CONTROL MOTOR RELAY

MOTOR DRIVE CIRCUIT

ELECTRICAL

CURRENT

DETECTION

CIRCUIT

AB

IGNITION TIMING CONTROL

MULTIPORT FUEL SYSTEM (MFI) <3.8L ENGINE>

13B-7

IGNITION TIMING CONTROL

M2132005000288

The ignition timing control system is basically the 
same as that for the 3.8L engine installed in the 
ENDEAVOR.

.

System Configuration Diagram

AK304258AB

MASS AIRFLOW 
SENSOR

PCM

IGNITION 
SWITCH-ST

IGNITION 
COIL

SPARK PLUG

CYLINDER No.

BATTERY

1

2

3

4

5

6

INTAKE AIR 
TEMPERATURE SENSOR

ENGINE COOLANT 
TEMPERATURE SENSOR

CAMSHAFT POSITION
SENSOR

CRANKSHAFT POSITION
SENSOR

TRANSMISSION
RANGE SWITCH

IGNITION SWITCH-ST

KNOCK SENSOR

FAN CONTROL (RADIATOR, A/C CONDENSOR)

MULTIPORT FUEL SYSTEM (MFI) <3.8L ENGINE>

13B-8

FAN CONTROL (RADIATOR, A/C CONDENSOR)

M2132022500015

•

The powertrain control module (PCM) turns on 
the lower speed power transistor, so that the fan 
control relay is in ON position, and then the radia-
tor fan and A/C condenser fan motors rotate 
slowly. PCM turns on the higher speed power 
transistor, so that radiator fan and A/C condenser 
fan motors rotate highly.

•

PCM performs the rotation control for the radiator 
fan and A/C condenser fan motors corresponding 
to the engine coolant temperature and vehicle 
speed by controlling (both of the higher and lower 
speed) power transistor.

.

AK304054

IG2

ST

LOCK

ACC

IG1

R

M

M

CONDENSER
FAN RELAY

FAN CONTROL RELAY

IGNITION
SWITCH

POWERTRAIN CONTROL
MODULE (PCM)

RADIATOR 
FAN MOTOR

RADIATOR 
FAN RELAY

CONDENSER 
FAN MOTOR

(LOW SPEED
 SIDE)

(HIGH SPEED
 SIDE)

BATTERY

AB