Mitsubishi Montero Sport (2004+). Manual - part 350

 

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Mitsubishi Montero Sport (2004+). Manual - part 350

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-813

INSPECTION PROCEDURE 29: Fuel pump system.

BL

ACK

-

BL

UE

BL

ACK

-

WHITE

BL

ACK

-

WHITE

BL

ACK

-

WHITE

BL

ACK

-

WHITE

BL

ACK

-WHITE

BL

ACK

WHITE-RED

1 2

BL

ACK

-

WHITE

AK200196

Fuel Pump Circuit

BL

ACK

-

WHITE

FUEL PUMP
RELAY

3

4

2

1

FUEL
PUMP

4

ACC

IG1

R

2

IG2

ST

3

JUNCTION
BLOCK

LOCK

IGNITION SWITCH

POWERTRAIN CONTROL
MODULE (PCM)

E-26

21

1

12

15

14

2

10

2

3 4

5 6

7 8

9

11 12 13 14 15 16 17 18 19 20

30

21 22 23

24

25

26 27 28 29

31 32 33

34 35

1

C-89
(MU803784)

1
3

2
4

D-08
(MU801342)

1 2 3
4 5 6

D-15

C-60

1 2 3 4 5

6 7 8 9 10

11 12 13 14 15 16 17 18 19 20 21 22

C-16
MU801461

1

10

15

2

11

3

12

4

13 14

5

16

6

17

7

18

8

19

9

20

E-44

1

2

3

4

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-814

.

CIRCUIT OPERATION

• A battery positive voltage is applied on the fuel 

pump relay (terminals No. 3, No. 4) from the igni-
tion switch-IG.

• During cranking and while the engine is running, 

the PCM turns the power transistor in the PCM 
"ON" to ground the fuel pump relay coil. With this, 
the fuel pump relay turns "ON" and the battery 
positive voltage is supplied to the fuel pump from 
the fuel pump relay (terminal No. 1).

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are: ) 

• Malfunction of the fuel pump relay.

• Malfunction of the fuel pump.

• Improper connector contact, open or short-cir-

cuited harness wire.

• Malfunction of the PCM.

AK103911AE

CONNECTOR: C-16

C-16

AK103738AD

CONNECTOR: C-89

PCM

C-89(GR)

AK200040AB

CONNECTOR: D-15

D-15(B)

AK200018 AB

CONNECTOR: E-44

E-44

AK201000

FUEL PUMP 
RELAY

CONNECTOR: C-60

AC

C-60

AK200035AB

CONNECTOR: D-08

D-08

JUNCTION BLOCK
(REAR SIDE)

AK200204

CONNECTOR: E-26

AB

E-26

FUEL PUMP

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-815

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I

• MB991827: USB Cable

• MB991911: Main Harness B

STEP 1. Using scan tool MB991958, check actuator test 
item 07: Fuel Pump.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the actuator test mode for item 

07, Fuel Pump.

• An operation sound of the fuel pump should be heard.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the fuel pump operating properly?

YES : That this malfunction is intermittent. Refer to GROUP 

00, How to Use Troubleshooting/Inspection Service 
Points 

P.00-7

.

NO :  Go to Step 2.

STEP 2. Check harness connector E-26 at fuel pump for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 3.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

AK200045

2 1

CONNECTOR: E-26

AB

HARNESS CONNECTOR:
COMPONENT SIDE

E-26

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-816

STEP 3 Check the fuel pump operation.
(1) Disconnect fuel pump connector E-26.

(2) Use jumper wires to connect fuel pump connector terminal 

No. 1 to the positive battery terminal and terminal No. 2 to 
the negative battery terminal.

• An operating sound of the fuel pump should be heard.

Q: Is the fuel pump operating properly?

YES : Go to Step 4.
NO :  Replace the fuel pump. Then confirm that the 

malfunction symptom is eliminated.

STEP 4. Check for continuity at fuel pump harness side 
connector E-26.
(1) Disconnect the connector E-26 and measure at the harness 

side.

(2) Check for the continuity between terminal No. 2 and 

ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 5.
NO :  Check harness connector E-44 at intermediate 

connector for damage, and repair or replace as 
required. Refer to, GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. If intermediate connector E-44 is 

in good condition, repair harness wire between fuel 
pump connector E-26 (terminal No. 2) and ground. 
Then confirm that the malfunction symptom is 
eliminated.

AK200045

2 1

CONNECTOR: E-26

AB

HARNESS CONNECTOR:
COMPONENT SIDE

E-26

AK000644

2

1

FUEL PUMP SIDE
CONNECTOR

AB

AK200045

2 1

CONNECTOR: E-26

AB

HARNESS CONNECTOR:
COMPONENT SIDE

E-26

AK000645

2 1

E-26 HARNESS CONNECTOR: 
COMPONENT SIDE

AC

 

 

 

 

 

 

 

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