Mitsubishi Grandis. Manual - part 734

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-187

STEP 7. Connector check: C-110 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal?

YES : 

Check and repair harness between B-01 

(terminal No. 1) purge control solenoid valve 
connector and C-110 (terminal No. 23) 
engine-ECU <M/T> connector or 
engine-A/T-ECU <A/T> connector.

• Check output line for open/short 

circuit.

NO : 

Repair or replace.

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.

AK305618AB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

AK305619

1

2

AB

Connector: B-01

B-01(B)

Harness
side connector

AK305618AB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

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-188

STEP 9. Check harness between B-01 (terminal 
No. 1) purge control solenoid valve connector 
and C-110 (terminal No. 23) engine-ECU <M/T> 
connector or engine-A/T-ECU <A/T> connector.

• Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair.

STEP 10. Check harness between B-01 (terminal 
No. 2) purge control solenoid valve connector 
and B-15X (terminal No. 1) engine control relay 
connector.

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

• Check power line for damage.

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair.

STEP 11. MUT-III actuator test

• Item 08: purge control solenoid valve

OK: Operating sound can be heard and the 
valve vibrates

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>.

AK305619

1

2

AB

Connector: B-01

B-01(B)

Harness
side connector

AK305618AB

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

Connector: C-110

<L.H. drive vehicles>

<R.H. drive vehicles>

C-110 (GR)

C-110 (GR)

Harness side connector

AK305619

1

2

AB

Connector: B-01

B-01(B)

Harness
side connector

AK300967

2

1

3

4

AC

Harness side
connector

B-15X

Connector: B-15X

Relay box’s
triangle marks

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-189

Code No. P0500: Vehicle Speed Sensor System <M/T>

OPERATION

• A power voltage of 5 V is applied to the vehicle 

speed sensor (terminal No. 3) from the 

engine-ECU (terminal No. 79).

AK305565

1

2

3

4

61
656667686970 717273
74757677787980 8182
8384

858687

8889

62

6364

1

2 3

1

2

3

AB

Engine-ECU

B-15X

B-107

B-107-1

(MU802723)

Vehicle speed sensor

Vehicle speed sensor circuit

 C-112

(MU803804)

B-W

W-L  (*1)
W-V (*2)

B-W

2

88

3

2

3

79  

15

12

J/C (4) 
C-116

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

W-G

Battery

W-G

Engine
control
relay

4

3

1

2

1
1

22

20

J/C (4)

C-116

R-W

R-W

To engine-ECU

NOTE

*1: L.H. drive vehicles
*2: R.H. drive vehicles

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-190

FUNCTION

• The vehicle speed sensor converts the vehicle 

speed to the voltage, and then input it into the 
engine-ECU

TROUBLE JUDGMENT

Check Conditions

• 2 seconds later after the engine has started up.

• Engine speed: 2,500 r/min or more.

• Under the high load operation.

Judgment Criterion

• The sensor output voltage remains unchanged 

(no pulse signal is inputted) for 2 seconds.

PROBABLE CAUSE

• Failed Vehicle speed sensor

• Open/short circuit in vehicle speed sensor circuit 

or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1.Check the speed meter

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Check the speed meter (Refer to GROUP 
54A 

−Combination Meter Assembly − 

On-vehicle Service 

− Speedmeter Check 

P.54A-81

).

STEP 2.MUT-III data list

• Refer to Data list reference table 

P.13A-363

.

a. Item 24: Vehicle speed sensor

Q: Is the check result normal?

YES : 

 Go to Step 3 .

NO : 

Intermittent malfunction (Refer to GROUP 
00 - How to Use Troubleshooting/Inspection 
Service Points 

P.00-5

).

STEP 3.Check connector: C-112 engine-ECU 
connector

Q: Is the check result normal?

YES : 

 Go to Step 4 .

NO : 

Repair or replace.

AK305617

Connector: C-112 

C-112 (GR)

C-112 (GR)

AB

Harness side connector

<R.H. drive vehicles>

<L.H. drive vehicles>