Mitsubishi Grandis. Manual — part 689

GENERAL INFORMATION

MULTIPORT FUEL INJECTION (MPI)

13A-7

MULTI-POINT FUEL INJECTION SYSTEM DIAGRAM

AK305547

1 Cylinder 1, 4 oxygen
sensor (front)

2 Cylinder 2, 3 oxygen
sensor (front)

3 Cylinder 1, 4 oxygen
sensor (rear)

4 Cylinder 2, 3 oxygen
sensor (rear)

5 Camshaft position sensor

7 Crank angle sensor

8 Detonation sensor

9 Throttle position sensor (main)
10 Throttle position sensor (sub)

6 Engine coolant
temperature sensor

Catalytic

converter

Catalytic
converter

From
fuel pump

Fuel pressure
regulator

To
fuel tank

Canister

4 EGR valve
(stepper motor)

5 Purge control
solenoid valve

M

11 Intake air temperature sensor

12 Air flow sensor

Air

3 Injector

1 Oil control
valve

2 Throttle valve
control servo

1 Cylinder 1, 4 oxygen
sensor (front)
2 Cylinder 2, 3 oxygen
sensor (front)
3 Cylinder 1, 4 oxygen
sensor (rear)
4 Cylinder 2, 3 oxygen
sensor (rear)
5 Camshaft position
sensor
6 Engine coolant
temperature sensor
7 Crank angle sensor
8 Detonation sensor
9 Throttle position sensor
(main)
10 Throttle position sensor
(sub)
11 Intake air temperature
sensor
12 Air flow sensor

Engine control relay
Fuel pump relay
A/C compressor relay
Throttle valve control
servo relay
Ignition coil
Fan controller
Diagnosis output
Alternator G terminal
Cylinder 1, 4 oxygen
sensor (front) heater
Cylinder 2, 3 oxygen
sensor (front) heater
Cylinder 1, 4 oxygen
sensor (rear) heater
Cylinder 2, 3 oxygen
sensor (rear) heater

Power supply
Ignition switch-IG
Ignition switch-ST
Power steering
fluid pressure sensor
Alternator FR
terminal
Accelerator pedal
position sensor
(main)
Accelerator pedal
position sensor
(sub)
Vehicle speed
sensor <M/T>
Inhibitor switch
<A/T>
Stop lamp switch

1 Oil control valve
2 Throttle valve
control servo
3 Injector
4 EGR valve
(Stepper motor)
5 Purge control solenoid
valve

Barometric
pressure
sensor

Engine-ECU
<M/T> or
Engine-A/T-
ECU <A/T>

AB

SERVICE SPECIFICATIONS

MULTIPORT FUEL INJECTION (MPI)

13A-8

SERVICE SPECIFICATIONS

M1131000301009

SEALANT

M1131000500624

Items

Specifications

Intake air temperature sensor
resistance k

Ω

−20°C

13

− 17

0

°C

5.3

− 6.7

20

°C

2.3

− 3.0

40

°C

1.0

− 1.5

60

°C

0.56

− 0.76

80

°C

0.30

− 0.45

Engine coolant temperature
sensor resistance k

Ω

−20°C

14

− 17

0

°C

5.1

− 6.5

20

°C

2.1

− 2.7

40

°C

0.9

− 1.3

60

°C

0.48

− 0.68

80

°C

0.26

− 0.36

Oxygen sensor output voltage (at racing) V

0.6

− 1.0

Oxygen sensor heater
resistance (at 20

°C) Ω

front

4.5

− 8.0

rear

11

− 18

Fuel pressure kPa

Vacuum hose disconnection

324

− 334 at curb idle

Vacuum hose connection

Approximately. 248 at curb idle

Injector coil resistance (at 20

°C) Ω

10.5

− 13.5

Throttle valve control servo coil resistance (at 20

°C) Ω

0.3

− 100

Oil control valve (at 20

°C) Ω

6.9

− 7.9

Item

Specified sealant

Remark

Engine coolant temperature sensor
Threaded portion

3M Nut Locking Part No. 4171 or equivalent Drying sealant

SPECIAL TOOLS

MULTIPORT FUEL INJECTION (MPI)

13A-9

SPECIAL TOOLS

M1131000600999

Tool

Number

Name

Use

MB991955
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991825
F: MB991826

MUT-III sub
assembly

A: Vehicle

communicatio
n interface
(V.C.I.)

B: MUT-III USB

cable

C: MUT-III main

harness A
(Vehicles with
CAN
communicatio
n system)

D: MUT-III main

harness B
(Vehicles
without CAN
communicatio
n system)

E: MUT-III

measurement
adapter

F: MUT-III trigger

harness

• Reading diagnosis code

• MPI system inspection

• Measurement of fuel pressure

CAUTION

For vehicles with CAN
communication, use MUT-III main
harness A to send simulated vehicle
speed. If you connect MUT-III main
harness B instead, the CAN
communication does not function
correctly.

MB991709

Test harness

• Measurement of voltage during

troubleshooting

• Inspection using an oscilloscope

MB991316

Test harness
(4-pin, square)

• Measurement of voltage during

Troubleshooting

• Inspection of oxygen sensor (front)

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

A

B

C

D

E

F

DO NOT USED

SPECIAL TOOLS

MULTIPORT FUEL INJECTION (MPI)

13A-10

MD998464

Test harness
(4-pin, square)

• Measurement of voltage during

Troubleshooting

• Inspection of oxygen sensor (rear)

MB991658

Test harness

• Measurement of voltage during

Troubleshooting

• Inspection using an oscilloscope

• Inspection of data list

MD998709

Adaptor hose

Measurement of fuel pressure

MD998742

Hose adaptor

MB991637

Fuel pressure
gauge set

MB991981

Fuel pressure
gauge set

Tool

Number

Name

Use

MB991658

MB991637

MB991981