Mitsubishi Montero (2004+). Manual - part 144

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-63

STEP 10. Check connector B-28 at the manifold absolute 
pressure sensor and connector D-135 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 11.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 18.

AK200975

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AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-28

B-28(B)

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-64

STEP 11. Check for short circuit to ground between 
manifold absolute pressure sensor connector B-28 
(terminal No. 3) and PCM connector D-135 (terminal No. 
97).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 18.
NO :  Repair it. Then go to Step 18.

AK200975

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3

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-28

B-28(B)

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-65

STEP 12. Measure the ground voltage at manifold absolute 
pressure sensor connector B-28 by backprobing.
(1) Do not disconnect the connector B-28.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 2 and ground by 

backprobing.

• Voltage should be 0.5 volt or less.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 0.5 volt or less?

YES : Go to Step 15.
NO :  Go to Step 13.

STEP 13. Check connector B-28 at the manifold absolute 
pressure sensor and connector D-135 at PCM for damage.
Q: Is the 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 go to Step 18.

AK200975

1

2

3

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-28

B-28(B)

3

2

1

AK203038

B-28 HARNESS 
CONNECTOR: 
HARNESS SIDE

AI

AK200975

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AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-28

B-28(B)

AK200947

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-66

STEP 14. Check for harness damage between manifold 
absolute pressure sensor connector B-28 (terminal No. 2) 
and PCM connector D-135 (terminal No. 96).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 18.
NO :  Repair it. Then go to Step 18.

STEP 15. Check connector B-28 at manifold absolute 
pressure sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 16.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 18.

AK200975

1

2

3

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-28

B-28(B)

AK200947

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

AK200975

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AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-28

B-28(B)