Mitsubishi Montero Sport (2004+). Manual - part 165

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-73

STEP 10. Check connector A-12 at the manifold absolute 
pressure sensor and connector C-90 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.

AK200034

2 1

3

AB

CONNECTOR: A-12

A-12(B)

HARNESS 
CONNECTOR:
COMPONENT 
SIDE

AK103762

42

43

48

49

50

51

52

53

54

55

56

57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-74

STEP 11. Check for short circuit to ground between 
manifold absolute pressure sensor connector A-12 
(terminal No. 3) and PCM connector C-90 (terminal No. 46).
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 12. Measure the ground voltage at manifold absolute 
pressure sensor connector A-12 by backprobing.
(1) Do not disconnect the connector A-12.
(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.

AK200034

2 1

3

AB

CONNECTOR: A-12

A-12(B)

HARNESS 
CONNECTOR:
COMPONENT 
SIDE

AK103762

42

43

48

49

50

51

52

53

54

55

56

57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK200034

2 1

3

AB

CONNECTOR: A-12

A-12(B)

HARNESS 
CONNECTOR:
COMPONENT 
SIDE

3

2

1

AK203038

A-12 HARNESS 
CONNECTOR: 
HARNESS SIDE

AF

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-75

STEP 13. Check connector A-12 at the manifold absolute 
pressure sensor and connector C-90 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.

AK200034

2 1

3

AB

CONNECTOR: A-12

A-12(B)

HARNESS 
CONNECTOR:
COMPONENT 
SIDE

AK103762

42

43

48

49

50

51

52

53

54

55

56

57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-76

STEP 14. Check for harness damage between manifold 
absolute pressure sensor connector A-12 (terminal No. 2) 
and PCM connector C-90 (terminal No. 57).
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 A-12 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.

AK200034

2 1

3

AB

CONNECTOR: A-12

A-12(B)

HARNESS 
CONNECTOR:
COMPONENT 
SIDE

AK103762

42

43

48

49

50

51

52

53

54

55

56

57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

AB

CONNECTOR: C-90

C-90(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK200034

2 1

3

AB

CONNECTOR: A-12

A-12(B)

HARNESS 
CONNECTOR:
COMPONENT 
SIDE