Mitsubishi Montero (2004+). Manual — part 341

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-851

STEP 10. 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 resistance between 13 and 16 ohms [at 20

°C

(68

°F)]?

YES : Go to Step 11.
NO : Replace the injector. Then confirm that the

malfunction symptom is eliminated.

STEP 11. 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.

STEP 12. Check harness connector B-44 at injector
intermediate connector 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.

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

AK200949

3

4

7

8

1

2

5

6

B-44(B)

CONNECTOR: B-44

AB

HARNESS
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-852

STEP 13. 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 14.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 14. Check harness connector D-132 at PCM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 15.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

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)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-853

STEP 15. Check for harness damage between injector
connector and PCM connector.

a. Check the harness wire between injector connector B-01

(terminal No. 2) and PCM connector D-132 (terminal No. 1)
at No. 1 cylinder injector.

b. Check the harness wire between injector connector B-33

(terminal No. 2) and PCM connector D-132 (terminal No. 5)
at No. 2 cylinder injector.

c. Check the harness wire between injector connector B-02

(terminal No. 2) and PCM connector D-132 (terminal No.
14) at No. 3 cylinder injector.

d. Check the harness wire between injector connector B-35

(terminal No. 2) and PCM connector D-132 (terminal No.
21) at No. 4 cylinder injector.

e. Check the harness wire between injector connector B-03

(terminal No. 2) and PCM connector D-132 (terminal No. 2)
at No. 5 cylinder injector.

f. Check the harness wire between injector connector B-11

(terminal No. 2) and PCM connector D-132 (terminal No. 6)
at No. 6 cylinder injector.

Q: Is the harness wire in good condition?

YES : Check the following items, and repair or replace the

defective items.

a. Check the ignition coil, spark plugs, spark plug

cables.

b. Check if the injectors are clogged.

c. Check if fuel is contaminated.

d. Check compression.

Then confirm that the malfunction symptom is

eliminated.

NO : Repair it. Then confirm that the malfunction symptom

is eliminated.

AK200960

1

2

B-03(GR)

B-11(GR)

B-35(GR)

B-33(GR)

B-02(GR)

B-01(GR)

CONNECTORS: B-01, B-02, B-03, B-11,

B-33, B-35

AB

HARNESS CONNECTOR:
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)

Continue

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-854

13A

INSPECTION PROCEDURE 6: Starts Up and Dies.

.

COMMENT

• In such cases as the above, the cause is usually

improper air/fuel mixture. It is possible, though
less likely, that the spark plugs are generating
sparks but the sparks are weak.

.

TROUBLESHOOTING HINTS (The most likely
causes for this case: )

• Malfunction of the ignition system.

• Malfunction of the injector system.

• Contaminated fuel.

• Poor compression.

• Dirtiness around throttle valve.

• Malfunction of the EGR valve.

• Malfunction of the PCM.

• Malfunction of the immobilizer system.

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

STEP 1. Measure the battery positive voltage.
(1) Measure the battery positive voltage during cranking.

• The voltage should be 8 volts or more.

Q: Dose the voltage remain greater than 8 volts while the

engine is cranked?
YES : Go to Step 2.
NO : Refer to GROUP 54A, Battery

− Battery Check

P.54A-5

.

STEP 2. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

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) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Refer to Diagnostic Trouble Code Chart

P.13A-4

.

NO : Go to Step 3.

AK302970

AB

MB991911

MB991824

MB991827