Mitsubishi Grandis. Manual - part 772

 

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Mitsubishi Grandis. Manual - part 772

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-339

STEP 22. Check harness between C-214 (terminal 
No. 2) fuel pump relay (2) connector and C-110 
(terminal No. 16) engine-ECU <M/T> connector or 
engine-A/T-ECU <A/T> connector.

NOTE: Before checking harness, check intermediate 
connectors C-18 and C-205, and repair if necessary.

• Check earthing line for damage.

Q: Is the check result normal?

YES : 

Replace fuel pump.

NO : 

Repair.

AK305634

2 1

3

4

AB

Connector: C-214

C-214

Harness side
connector

C-214

Relay box’s
triangle marks

<L.H. drive vehicles>

<R.H. drive vehicles>

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-340

Inspection Procedure 24: Fan Control Relay System

OPERATION

• The battery voltage is applied to the fan control 

relay (terminal No. 1) from the engine control 

relay (terminal No. 1) and is earthed to the 
vehicle body from the fan control relay (terminal 
No. 3).

AK305580

1

2

3

4

1

3

2

4

1 2 3

1

2

3

5

6 7 8 9

4

20

21 22

232425

2627

10111213

14 15

16 1718

19

AB

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

Fusible link (26)

W

W

J/C (4) 
C-116

9

20A

Fan control
circuit

Engine control relay

W-G

L-W

L-W

L-W

A-13X

W-G

W-G

R-W

R-W

R-W

Engine control system

Fusible link (2)

4

3

1

2

Fan control relay

Fan controller

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

4

3

W

3

2

1

5

B

B-15X

11

8

1

A-16

2

A-16

17

8

2

A-16

A-25

A-26

(MU802322)

C-110

(MU803802)

Fan control relay circuit

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

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-341

• The battery voltage is applied to the fan control 

relay (terminal No. 4).

• When the fan control relay is in ON position, the 

battery voltage is supplied to the fan controller 
(terminal No. 1) from the fan control relay 
(terminal No. 2).

FUNCTION

• When the engine control relay is in ON position, 

the fan control relay is also simultaneously placed 
in "ON" position. Accordingly, the battery voltage 
is supplied to the fan controller.

PROBABLE CAUSE

• Failed fan control relay

• Failed fan controller

• Failed radiator fan motor

• Failed condenser fan motor

• Open/short circuit in fan control relay circuit or 

loose connector contact

• Failed engine-ECU <M/T>

• Failed engine-A/T-ECU <A/T>

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-13X fan control 
relay connector

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Repair or replace.

STEP 2. Check fan control relay.

• Check fan control relay (Refer to GROUP 14 − 

On

−vehicle Service − Fan Control Relay 

Continuity Check 

P.14-19

).

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Replace fan control relay.

STEP 3. Perform resistance measurement at 
A-13X fan control relay connector.

• Remove relay and measure at relay box side.

• Resistance between terminal No. 1 and earth.

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Go to Step 4 .

STEP 4. Connector check: A-25 earth connector.

Q: Is the check result normal?

YES : 

Check and repair harness between A-13X 

(terminal No. 1) fan control relay connector 
and A-25 (terminal No. 5) earth connector.

• Check earthing line for open circuit 

and damage.

NO : 

Repair or replace.

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

3

2 1

6

5 4

AK305636AB

 A-25 (GR)

Connector: A-25

Harness side connector

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-342

STEP 5. Perform voltage measurement at A-13X 
fan control relay connector.

• Remove relay and measure at relay box side.

• Ignition switch: ON

• Voltage between terminal No. 3 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Go to Step 6 .

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

Q: Is the check result normal?

YES : 

Check intermediate connectors A-16 and 

C-116, and repair if necessary. If 
intermediate connectors are normal, check 
and repair harness between B-15X (terminal 
No. 1) engine control relay connector and 
A-13X (terminal No. 3) fan control relay 
connector.

• Check power supply line for 

open/short circuit.

NO : 

Repair or replace.

STEP 7. Perform voltage measurement at A-13X 
fan control relay connector.

• Remove relay, and measure at relay box side.

• Voltage between terminal No. 4 and earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Check and repair harness between battery 

and A-13X (terminal No. 4) fan control relay 
connector.

• Check power supply line for 

open/short circuit.

STEP 8. Connector check: A-26 fan controller 
connector

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair or replace.

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

AK300967

2

1

3

4

AC

Harness side
connector

B-15X

Connector: B-15X

Relay box’s
triangle marks

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

AK301004

3

1

2

4

AC

Connector: A-13X

 A-13X 

Harness side
connector

AK300999

1

2

3

AC

Harness side connector

Connector: A-26

 A-26 (GR)

 

 

 

 

 

 

 

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