Mitsubishi Montero Sport (2004+). Manual — part 259

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-449

STEP 3. Check the injector.
(1) Disconnect the injector connector A-75 <No. 1 cylinder>,

A-72 <No. 2 cylinder>, A-74 <No. 3 cylinder>, A-71 <No. 4
cylinder>, A-73 <No. 5 cylinder>, A-70 <No. 6 cylinder>.

(2) 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 4.
NO : Replace the injector. Then go to Step 9.

STEP 4. Check connector at injector and injector
intermediate connector for damage.

a. Check the connector A-75 at injector and connector A-04 at

injector intermediate connector when checking No. 1 cylin-
der.

b. Check the connector A-72 at injector and connector A-04 at

injector intermediate connector when checking No. 2 cylin-
der.

c. Check the connector A-74 at injector and connector A-04 at

injector intermediate connector when checking No. 3 cylin-
der.

d. Check the connector A-71 at injector and connector A-04 at

injector intermediate connector when checking No. 4 cylin-
der.

e. Check the connector A-73 at injector and connector A-04 at

injector intermediate connector when checking No. 5 cylin-
der.

f. Check the connector A-70 at injector and connector A-04 at

injector intermediate connector when checking No. 6 cylin-
der.

Q: Is the connector in good condition?

YES : Go to Step 5.
NO : Repair or replace the injector. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

. Then go to

Step 9.

AK200022

1

2

AB

CONNECTORS: A-70, A-71, A-72, A-73, A-74,
A-75

A-70(GR)

A-71(GR)

A-72(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

A-73(GR)

A-74(GR)

A-75(GR)

AK000456

1 2

INJECTOR SIDE
CONNECTOR

AB

AK200022

1

2

AB

CONNECTORS: A-70, A-71, A-72, A-73, A-74,
A-75

A-70(GR)

A-71(GR)

A-72(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

A-73(GR)

A-74(GR)

A-75(GR)

AK200014

7

2 1
6 5

4 3
8

CONNECTOR: A-04

AB

FEMALE SIDE
CONNECTOR

A-04(B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-450

STEP 5. Check connector C-89 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 9.

STEP 6. Check for harness damage between injector
connector and PCM connector.

a. Check the harness wire between injector connector A-75

(terminal No. 2) and PCM connector C-89 (terminal No. 1)
when checking No. 1 cylinder.

b. Check the harness wire between injector connector A-72

(terminal No. 2) and PCM connector C-89 (terminal No. 9)
when checking No. 2 cylinder.

c. Check the harness wire between injector connector A-74

(terminal No. 2) and PCM connector C-89 (terminal No. 24)
when checking No. 3 cylinder.

d. Check the harness wire between injector connector A-71

(terminal No. 2) and PCM connector C-89 (terminal No. 2)
when checking No. 4 cylinder.

e. Check the harness wire between injector connector A-73

(terminal No. 2) and PCM connector C-89 (terminal No. 10)
when checking No. 5 cylinder.

f. Check the harness wire between injector connector A-70

(terminal No. 2) and PCM connector C-89 (terminal No. 25)
when checking No. 6 cylinder.

Q: Is the harness wire in good condition?

YES : Go to Step 7.
NO : Repair it. Then go to Step 9.

STEP 7. Check the compression.
Refer to GROUP 11A, On-Vehicle Service-Compression Pres-
sure Check

P.11A-12

Q: Are there any abnormalities?

YES : Go to Step 8.
NO : Repair or replace it. Then go to Step 9.

AK103914

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30

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25

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31

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33

34

35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK200022

1

2

AB

CONNECTORS: A-70, A-71, A-72, A-73, A-74,
A-75

A-70(GR)

A-71(GR)

A-72(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

A-73(GR)

A-74(GR)

A-75(GR)

AK103914

2

3

4

5

6

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19

20

30

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24

25

26

27

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29

31

32

33

34

35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-451

STEP 8. Replace the injector.
(1) Replace the injector.
(2) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Procedure 6 −

Other Monitor

P.13A-4

.

(3) Check the diagnostic trouble code (DTC).
Q: Are DTC P0301, P0302, P0303, P0304, P0305 and P0306

sets?
YES : Replace the PCM. Then go to Step 9.
NO : The procedure is complete.

STEP 9. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Procedure 6 −

Other Monitor

P.13A-4

.

(2) Check the diagnostic trouble code (DTC).
Q: Are DTC P0301, P0302, P0303, P0304, P0305 and P0306

sets?
YES : Repeat the troubleshooting.
NO : The procedure is complete.

AK200022

1

2

AB

CONNECTORS: A-70, A-71, A-72, A-73, A-74,
A-75

A-70(GR)

A-71(GR)

A-72(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

A-73(GR)

A-74(GR)

A-75(GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

13A-452

DTC P0335: Crankshaft Position Sensor Circuit

AK200188

WHITE-

BLA

CK

WHITE-

BLA

CK

WHITE-

BLA

CK

BLA

CK

RED

RED

BLUE

FUSIBLE LINK(12)

MFI
RELAY

45

3

12

3

4

2

1

15

1

2

1 2

3

A-43
MU802603

5V

POWERTRAIN CONTROL
MODULE (PCM)

CRANKSHAFT
POSITION
SENSOR

C-59

1

10

2 3 4 5 6 7 8 9

11

12 13 14 15 16 17 18 19 20 21 22

23 24 25 26 27 28 29 30 31 32 33

C-14

47

41

42 43

48 49 50 51 52 53 54 55 56 57

46

45

44

58

59

60 61 62 63

64 65 66

C-90
(MU803781)

JOINT
CONNECTOR (5)

Crankshaft Position Sensor Circuit

1

2

3

4