Mitsubishi Grandis. Manual - part 719

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-127

STEP 5. Connector check: B-15X engine control 
relay connector

Q: Is the check result normal? 

YES : 

Check intermediate connector C-116, and 

repair if necessary. If intermediate 
connector is normal, check and repair 
harness between B-15X (terminal No. 1) 
engine control relay connector and B-104 
(terminal No. 1) No. 3 injector connector.

• Check power supply line for 

open/short circuit.

NO : 

Repair or replace.

STEP 6. Connector check: B-15X engine control 
relay connector

Q: Is the check result normal? 

YES : 

Go to Step 7 .

NO : 

Repair or replace.

STEP 7. Check harness between B-15X (terminal 
No. 1) engine control relay connector and B-104 
(terminal No. 1) No. 3 injector connector.

NOTE: Before checking harness, check intermediate 
connector C-116, and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal? 

YES : 

Go to Step 8 .

NO : 

Repair.

AK300967

2

1

3

4

AC

Harness side
connector

B-15X

Connector: B-15X

Relay box’s
triangle marks

AK300978

M

1

2

Connector: B-104

B-104 (GR)

AK300978AL

Harness side connector

AK300967

2

1

3

4

AC

Harness side
connector

B-15X

Connector: B-15X

Relay box’s
triangle marks

AK300967

2

1

3

4

AC

Harness side
connector

B-15X

Connector: B-15X

Relay box’s
triangle marks

AK300978

M

1

2

Connector: B-104

B-104 (GR)

AK300978AL

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-128

STEP 8. Connector check: C-110 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal? 

YES : 

Go to Step 9 .

NO : 

Repair or replace.

STEP 9. Check harness between B-104 (terminal 
No. 2) No. 3 injector connector and C-110 
(terminal No. 14) engine-ECU <M/T> connector or 
engine-A/T-ECU <A/T> connector.

• Check output line for open/short circuit and 

damage.

Q: Is the check result normal? 

YES : 

Go to Step 10 .

NO : 

Repair.

AK305618AB

1

2

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27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

AK300978

M

1

2

Connector: B-104

B-104 (GR)

AK300978AL

Harness side connector

AK305618AB

1

2

3

4

5

6

7

8

9

10

11

12

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14

15

16

17

18

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26

27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-129

STEP 10. Perform signal wave pattern 
measurement at C-110 engine-ECU <M/T> 
connector or engine-A/T-ECU <A/T> connector 
(Using on oscilloscope).

• Engine: Idling

• Transmission: Neutral <M/T> or P range <A/T>

• Voltage between terminal No. 14 and earth.

OK: Waveform should be display on 
Inspection procedure using an oscilloscope 
(Refer to 

P.13A-378

).

Q: Is the check result normal? 

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

NO : 

Replace engine-ECU <M/T> or 
engine-A/T-ECU <A/T>.

AK305618AB

1

2

3

4

5

6

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26

27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-130

Code No. P0204: No. 4 Injector System

AK305559

2

1

2

1

2

1

2

1

1

2

3

4

1

2

3

5

6 7 8 9

4

20

21 22

232425

2627

10111213

14 15

16 1718

19

AB

B-15X

Engine
control
relay

Injector
No. 1

Injector
No. 2

J/C (4)

C-116

J/C (4)

C-116

Injector
No. 3

Injector
No. 4

B-105

(MU802062)

B-104

(MU802062)

B-102

(MU802062)

B-101

(MU802062)

1

1

1

1

17

18

19

1

9

11 

22

2

2

2

2

2

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

1

5

14

21

C-110

(MU803802)

Injector circuit

W-G

W-G

R-W

R-W

R-W

R-W

R-W

R-W

R-W

Wire colour code
B: Black  LG: Light green  G: Green  L: Blue  W: White  Y: Yellow  SB: Sky blue  BR: Brown  O: Orange  GR: Gray
R: Red  P: Pink  V: Violet

Y

Y-L

Y-G

G-B

Battery

4

3

To engine-ECU <M/T> or
engine-A/T-ECU <A/T>