Mitsubishi Montero Sport (2004+). Manual - part 281

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-537

STEP 5. Check connector C-59 at MFI relay for damage.
Q: Is the connector in good condition?

YES : Check connectors C-14, C-79 and E-45 at 

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

P.00E-2

. If intermediate 

connectors are in good condition, repair harness wire 
between MFI relay connector C-59 (terminal No. 1) 
and evaporative emission ventilation solenoid 
connector E-63 (terminal No. 1) because of open 
circuit or short circuit to ground. Then go to Step 12.

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

Connector Inspection 

P.00E-2

. Then go to Step 12.

STEP 6. Measure the power supply voltage at PCM 
connector C-89 by backprobing.
(1) Do not disconnect the connector C-89.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 35 and ground 

by backprobing.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) 

present?
YES : Go to Step 9.
NO :  Go to Step 7.

AK200023

2 1

3

4

CONNECTOR: C-59

AB

C-59

HARNESS 
CONNECTOR:
COMPONENT 
SIDE

AK103914

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30

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35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01548

1

2

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5 6

7 8

10 11 12 13 14 15 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 31 32 33

34 35

C-89 HARNESS CONNECTOR: 
HARNESS SIDE

AF

9

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-538

STEP 7. Check connector C-89 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 8.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

STEP 8. Check for open circuit and short circuit to ground 
between evaporative emission ventilation solenoid 
connector E-63 (terminal No. 2) and PCM connector C-89 
(terminal No. 35).

NOTE: Check harness after checking intermediate connectors 
C-79 and E-45. If intermediate connectors are damaged, repair 
or replace them. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. Then go to Step 12.

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 12.
NO :  Repair it. Then go to Step 12.

AK103914

2

3

4

5

6

7

8

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30

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34

35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK200028

2 1

CONNECTOR: E-63

AB

E-63(B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK103914

2

3

4

5

6

7

8

9

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30

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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-539

STEP 9. Check connector C-89 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 10.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

STEP 10. Check for harness damage between MFI relay 
connector C-59 (terminal No. 1) and evaporative emission 
ventilation solenoid connector E-63 (terminal No. 1).

NOTE: Check harness after checking intermediate connectors 
C-14, C-79 and E-45. If intermediate connectors are damaged, 
repair or replace them. Refer to GROUP 00E, Harness Con-
nector Inspection 

P.00E-2

. Then go to Step 12.

Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO :  Repair it. Then go to Step 12.

AK103914

2

3

4

5

6

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11

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30

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35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK200023

2 1

3

4

CONNECTOR: C-59

AB

C-59

HARNESS 
CONNECTOR:
COMPONENT 
SIDE

AK200028

2 1

CONNECTOR: E-63

AB

E-63(B)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-540

STEP 11. Check for harness damage between evaporative 
emission ventilation solenoid connector E-63 (terminal No. 
2) and PCM connector C-89 (terminal No. 35).

NOTE: Check harness after checking intermediate connectors 
C-79 and E-45. If intermediate connectors are damaged, repair 
or replace them. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. Then go to Step 12.

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 12.
NO :  Repair it. Then go to Step 12.

STEP 12. 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: Is DTC P0446 set?

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

AK200028

2 1

CONNECTOR: E-63

AB

E-63(B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK103914

2

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30

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35

1

10

AB

CONNECTOR: C-89

C-89(GR)

HARNESS CONNECTOR:
COMPONENT SIDE