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