Mitsubishi Montero (2004+). Manual - part 248

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-479

STEP 11. Measure the power supply voltage at crankshaft 
position sensor harness side connector B-36.
(1) Disconnect the connector B-36 and measure at the harness 

side.

(2) Turn the ignition switch to the "ON" position.

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

• 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 13.
NO :  Go to Step 12.

STEP 12. Check connector B-22X at MFI relay for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between MFI relay connector 

B-22X (terminal No. 1) and crankshaft position sensor 
connector B-36 (terminal No. 3) because of open 
circuit or short circuit to ground. Then go to Step 21.

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

Connector Inspection 

P.00E-2

. Then go to Step 21.

AK200962

1

2

3

AB

CONNECTOR: B-36

B-36(B)

CRANKSHAFT
POSITION
SENSOR

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AKX01417AJ

2 1

3

B-36 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK200951

2 1

3

4

B-22X

AB

CONNECTOR: B-22X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-480

STEP 13. Check the continuity at crankshaft position 
sensor harness side connector B-36.
(1) Disconnect the connector B-36 and measure at the harness 

side.

(2) Check for the continuity between terminal No. 1 and 

ground.

• Should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 16.
NO :  Go to Step 14.

STEP 14. Check connector D-134 at PCM for damage.
Q: Is the 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 go to Step 21.

AK200962

1

2

3

AB

CONNECTOR: B-36

B-36(B)

CRANKSHAFT
POSITION
SENSOR

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AKX01418 AK

2 1

3

B-36 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201166

61

62

63

64

65

66

67

68

69

70

71

76

77

78

79

85

86

87

80

72

73

74

75

81

82

83

84

88

89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-481

STEP 15. Check for open circuit and harness damage 
between crankshaft position sensor connector B-36 
(terminal No. 1) and PCM connector D-134 (terminal No. 
88).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 21.
NO :  Repair it. Then go to Step 21.

AK200962

1

2

3

AB

CONNECTOR: B-36

B-36(B)

CRANKSHAFT
POSITION
SENSOR

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201166

61

62

63

64

65

66

67

68

69

70

71

76

77

78

79

85

86

87

80

72

73

74

75

81

82

83

84

88

89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-482

STEP 16. Check connector B-22X at the MFI relay for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 17.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 21.

STEP 17. Check connector D-134 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 18.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 21.

AK200951

2 1

3

4

B-22X

AB

CONNECTOR: B-22X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201166

61

62

63

64

65

66

67

68

69

70

71

76

77

78

79

85

86

87

80

72

73

74

75

81

82

83

84

88

89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE