Mitsubishi Montero (2002-2004). Manual — part 554

GENERAL DESCRIPTION

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MULTIPORT FUEL INJECTION (MFI)

13Aa-3

MULTIPORT FUEL INJECTION (MFI) SYSTEM DIAGRAM

NOTE: For the vacuum routing, refer to GROUP 17,
Emission Control System

−

Vacuum Hoses

−

Vac-

uum Hose Routing

P.17-56

.

AK201103

1 LEFT BANK HEATED OXYGEN SENSOR (FRONT)
2 VOLUME AIRFLOW SENSOR
3 INTAKE AIR TEMPERATURE SENSOR
4 THROTTLE POSITION SENSOR (MAIN/SUB)
5 CAMSHAFT POSITION SENSOR
6 CRANKSHAFT POSITION SENSOR
7 BAROMETRIC PRESSURE SENSOR
8 ENGINE COOLANT TEMPERATURE SENSOR
9 LEFT BANK HEATED OXYGEN SENSOR (REAR)
10 RIGHT BANK HEATED OXYGEN SENSOR (FRONT)
11 RIGHT BANK HEATED OXYGEN SENSOR (REAR)
12 FUEL TANK DIFFERENTIAL PRESSURE SENSOR
13 MANIFOLD DIFFERENTIAL PRESSURE SENSOR
14 FUEL TANK TEMPERATURE SENSOR
15 FUEL LEVEL SENSOR

POWER SUPPLY
ACCELERATOR PEDAL POSITION SENSOR
(MAIN/SUB)
ACCELERATOR PEDAL POSITION SWITCH
VEHICLE SPEED SENSOR
A/C SWITCH 1, 2
TRANSMISSION RANGE SWITCH
POWER STEERING PRESSURE SWITCH
IGNITION SWITCH - ST
KNOCK SENSOR

1 INJECTOR
2 EVAPORATIVE EMISSION
PURGE SOLENOID
3 THROTTLE ACTUATOR CONTROL
MOTOR
4 EVAPORATIVE EMISSION
VENTILATION SOLENOID
5 EGR VALVE (STEPPER MOTOR)
6 INTAKE MANIFOLD TUNING
SOLENOID

FUEL PUMP RELAY
MULTIPORT FUEL INJECTION
(MFI) RELAY
THROTTLE ACTUATOR CONTROL
MOTOR RELAY
A/C COMPRESSER CLUTCH RELAY
MALFUNCTION INDICATOR LAMP
(SERVICE ENGINE SOON OR
CHECK ENGINE LAMP)
DIAGNOSTIC OUTPUT
IGNITION COIL, IGNITION POWER
TRANSISTER

PCM

SENSE

DECIDE

ACT

1 LEFT BANK HEATED
OXYGEN SENSOR
(FRONT)

6 CRANKSHAFT POSITION SENSOR

11 RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)

9 LEFT BANK HEATED
OXYGEN SENSOR (REAR)

5 CAMSHAFT POSITION
SENSOR

1 INJECTOR

M*

M*

6 INTAKE MANIFOLD
TUNING SOLENOID

VACUUM TANK

3 THROTTLE
ACTUATOR
CONTROL
MOTOR

2 EVAPORATIVE EMISSION
PURGE SOLENOID

5 EGR VALVE
(STEPPER
MOTOR)

4

EVAPORATIVE
EMISSION
CANISTER

FUEL
TANK

FROM
FUEL
PUMP

8

2, 7

VOLUME AIRFLOW SENSOR
(WITH BAROMETRIC
PRESSURE SENSOR)

3 INTAKE AIR
TEMPERATURE SENSOR

AIR
INLET

12 FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR

14 FUEL TANK
TEMPERATURE
SENSOR

15 FUEL
LEVEL
SENSOR

4 THROTTLE POSITION SENSOR
(MAIN/SUB)

TO
FUEL
TANK

FUEL
PRESSURE
REGULATOR

13 MANIFOLD
DIFFERENTIAL
PRESSURE
SENSOR

ENGINE
COOLANT
TEMPERATURE
SENSOR

10 RIGHT BANK

HEATED
OXYGEN
SENSOR
(FRONT)

NOTE
*: Manifold port

EVAPORATIVE EMISSION
VENTILATION SOLENOID

EVAPORATIVE EMISSION
VENTILATION VALVE

SPECIAL TOOLS

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MULTIPORT FUEL INJECTION (MFI)

13Aa-4

SPECIAL TOOLS

M1131000600245

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991502
Scan tool <MUT-II>

MB991496-OD

• Reading diagnostic

trouble code

• MFI system inspection

• Measurement of fuel

pressure

MB991348
Test harness set

MB991348-01

• Inspection of throttle

position sensor

• Inspection using an

oscilloscope

MB991658
Test harness SET

Tool not available

• Inspection using an

oscilloscope

• Adjustment of

accelerator pedal
position sensor

MB991709
Test harness set

MB991709-01

Inspection using an
oscilloscope

MD998474
Test harness (8 pin,
square)

MD998474-01

Inspection using an
oscilloscope

MD998464
Test harness (4 pin,
square)

MD998464-01

• Inspection of heated

oxygen sensor

• Inspection using an

oscilloscope

MB991316
Test harness (4 pin,
square)

Tool not available

Inspection of heated
oxygen sensor

B991502

MB991348

MB991658

ON-VEHICLE SERVICE

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MULTIPORT FUEL INJECTION (MFI)

13Aa-5

ON-VEHICLE SERVICE

COMPONENT LOCATION

M1131002100451

MD998478
Test harness (3 pin,
triangle)

MD998478-01

Inspection using an
oscilloscope

MB991637
Fuel pressure gauge set

Tool not available

Measurement of fuel
pressure

MD998709
Adaptor hose

MIT210196

Measurement of fuel
pressure

MD998742
Hose adaptor

MD998742-01

Measurement of fuel
pressure

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB991637

NAME

SYMBOL

NAME

SYMBOL

Accelerator pedal position sensor (with
built-in accelerator pedal position
switch)

S

Left bank heated oxygen sensor
(front)

I

Air conditioning compressor clutch relay K

Left bank heated oxygen sensor
(rear)

V

Camshaft position sensor

G

Malfunction Indicator Lamp
(SERVICE ENGINE SOON or check
engine lamp)

R

Crankshaft position sensor

M

Manifold differential pressure sensor F

Data link connector

T

Multiport fuel injection (MFI) relay

J

EGR valve

D

Powertrain control module

U

Engine coolant temperature sensor

L

Power steering pressure switch

Q

Evaporative emission purge solenoid

E

Right bank heated oxygen sensor
(front)

B

Evaporative emission ventilation
solenoid

X

Right bank heated oxygen sensor
(rear)

Y

ON-VEHICLE SERVICE

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MULTIPORT FUEL INJECTION (MFI)

13Aa-6

Fuel level sensor

a

Throttle actuator control motor

C

Fuel pump relay

J

Throttle actuator control motor relay J

Fuel tank differential pressure sensor

a

Throttle position sensor

C

Fuel tank temperature sensor

a

Transmission range switch

Z

Ignition coil

H

Intake manifold tuning solenoid

P

Injector

O

Vehicle speed sensor

W

Intake manifold tuning solenoid

P

Volume airflow sensor (with built-in
intake air temperature sensor and
barometric pressure sensor)

A

Knock sensor

N

NAME

SYMBOL

NAME

SYMBOL

AK201271

AB

L

M

N

O

P

Q

A

B

C

D

E

F

G

H

I

J

K

R

T

S

V

W

Y

Z

a

U

X

AK200940AE

VOLUME AIRFLOW
SENSOR

A