Mitsubishi Montero (2004+). Manual - part 342

 

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Mitsubishi Montero (2004+). Manual - part 342

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-855

STEP 3. Using scan tool MB991958, check actuator test.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the actuator test. Refer to 

Actuator Test Reference Table 

P.13A-966

.

a. Item 07: Fuel Pump.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the actuator operating properly?

YES : Go to Step 4.
NO :  Repair or replace. Then confirm that the malfunction 

symptom is eliminated.

STEP 4. Using scan tool MB991958, check data list.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items in the data list. Refer to Data List 

Reference Table 

P.13A-950

.

a. Item 21: Engine Coolant Temperature Sensor.
b. Item 18: Cranking signal (ignition switch-ST)

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 5.
NO :  Repair or replace. Then confirm that the malfunction 

symptom is eliminated.

STEP 5. Inspection of throttle body (throttle valve area) for 
dirtiness.
Q: Is the throttle valve area dirty?

YES : Refer to On-vehicle Service 

− Clean the throttle valve 

area 

P.13A-993

.

NO :  Go to Step 6.

STEP 6. Check the ignition timing.
(1) Check the ignition timing at cranking.

Standard value: 5

° BTDC ± 3°

Q: Is the ignition timing normal?

YES : Go to Step 7.

AK302970

AB

MB991911

MB991824

MB991827

AK302970

AB

MB991911

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-856

NO :  Check that the crankshaft position sensor and timing 

belt cover are in the correct position. Then confirm 
that the malfunction symptom is eliminated.

STEP 7. Check the left bank injector.
(1) Disconnect the left bank injector connector B-11, B-33, 

B-35.

(2) Measure the resistance between each injector side 

connector terminal No. 1 and No. 2.

Standard value: 13 

 16 ohms [at 20°C (68°F)]

Q: Is the resistance between 13 and 16 ohms [at 20

°

(68

°F)]?

YES : Go to Step 8.
NO :  Replace the faulty injector. Then confirm that the 

malfunction symptom is eliminated.

STEP 8. Check the right bank injector resistance at injector 
intermediate connector B-44.
(1) Disconnect the injector intermediate connector B-44.

(2) Measure the resistance between each male connector side 

terminal.

a. Measure the resistance between terminal No. 8 and No. 

3 at No. 1 cylinder injector.

b. Measure the resistance between terminal No. 8 and No. 

1 at No. 3 cylinder injector.

c. Measure the resistance between terminal No. 8 and No. 

6 at No. 5 cylinder injector.

• Resistance should be between 13 and 16 ohms [at 20°C 

(68

°F)].

AK201292

1

2

B-11(GR)

B-35(GR)

B-33(GR)

CONNECTORS: B-11, B-33, B-35

AB

HARNESS 
CONNECTORS: 
COMPONENT SIDE

AKX01414AB

INJECTOR SIDE
CONNECTOR

1 2

AK200949

3

4

7

8

1

2

5

6

B-44(B)

CONNECTOR: B-44

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AKX01495

INJECTOR INTERMEDIATE
MALE SIDE CONNECTOR 

1 2 3 4

5 6 7 8

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-857

Q: Is the measured resistance between 13 and 16 ohms [at 

20

°C (68°F)]?

YES : Go to Step 11.
NO :  Go to Step 9.

STEP 9. Check the right bank injector.
(1) Remove the intake manifold.
(2) Disconnect the right bank injector connector, which 

deviates from the standard value at Step 8.

(3) Measure the resistance between injector side connector 

terminal No. 1 and No. 2.

Standard value: 13 

 16 ohms [at 20°C (68°F)]

Q: Is the measured resistance between 13 

 16 ohms [at 

20

°C (68°F)]?

YES : Go to Step 10.
NO :  Replace the injector. Then confirm that the 

malfunction symptom is eliminated.

STEP 10. Check harness connector B-01 or B-02 or B-03 at 
right bank injector for damage.
(1) Check the injector connector, which deviates from the 

standard value at Step 9.

Q: Is the harness connector in good condition?

YES : Repair harness wire between injector intermediate 

connector and right bank injector connector because 
of harness damage. Then confirm that the 
malfunction symptom is eliminated.

NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

AK200950

1

2

B-03(GR)

B-02(GR)

B-01(GR)

CONNECTORS: B-01, B-02, B-03

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AKX01414AB

INJECTOR SIDE
CONNECTOR

1 2

AK200950

1

2

B-03(GR)

B-02(GR)

B-01(GR)

CONNECTORS: B-01, B-02, B-03

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-858

STEP 11. Check harness connector B-44 at injector 
intermediate connector for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 12.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

STEP 12. Check harness connector B-11, B-33, B-35 at left 
bank injector for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 13.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

.Then confirm that the 

malfunction symptom is eliminated.

STEP 13. Check harness connector D-132 at PCM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 14.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

AK200949

3

4

7

8

1

2

5

6

B-44(B)

CONNECTOR: B-44

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201292

1

2

B-11(GR)

B-35(GR)

B-33(GR)

CONNECTORS: B-11, B-33, B-35

AB

HARNESS 
CONNECTORS: 
COMPONENT SIDE

AK200938

2

3

4

5

6

7

8

9

1

10

14

15

16

17

18

19

20

21

22

23

24

25

26

27

11

12

13

AB

CONNECTOR: D-132

HARNESS CONNECTOR: 
COMPONENT SIDE

PCM

D-132(GR)

 

 

 

 

 

 

 

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