Mitsubishi Montero Sport (2004+). Manual - part 183

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-145

STEP 9. Check for open circuit and harness damage 
between throttle position sensor connector A-41 (terminal 
No. 1) and PCM connector C-90 (terminal No. 57).

NOTE: Check harness after checking intermediate connector 
C-71. If intermediate connector is damaged, repair or replace it. 
Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

. 

Then go to Step 14.
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 14.
NO :  Repair it. Then go to Step 14.

AK000363

AK104024

CONNECTOR: A-41

AB

THROTTLE
POSITION
SENSOR

A-41(B)

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-146

STEP 10. Check connector C-90, C-91 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 14.

STEP 11. Check for harness damage between throttle 
position sensor connector A-41 (terminal No. 3) and PCM 
connector C-91 (terminal No. 78).
Q: Is the harness wire in good condition?

YES : Go to Step 12.
NO :  Repair it. Then go to Step 14.

AK104029

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

98

78

71

88

89

76

77

72
79
91

73
80

74

75

81
92

82

83

93

84

85

94

86

87

95

96

90

97

AB

CONNECTORS: C-90, C-91

C-90(GR) C-91(GR)

C-90 HARNESS CONNECTOR:
COMPONENT SIDE

C-91 HARNESS CONNECTOR:
COMPONENT SIDE

AK000363

AK104027

4 3 2 1

CONNECTOR: A-41

AB

HARNESS CONNECTOR:
COMPONENT SIDE

A-41(B)

AK104028

98

78

71

88

89

76

77

72
79
91

73
80

74

75

81
92

82

83

93

84

85

94

86

87

95

96

90

97

AB

CONNECTOR: C-91

C-91(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-147

STEP 12. Check the incorrectly adjusted throttle position 
sensor.
Refer to On-vehicle Service 

− Throttle Position Sensor Adjust-

ment 

P.13A-881

.

Q: Is the output voltage normal?

YES : Go to Step 13.
NO :  Adjust it. Then go to Step 14.

STEP 13. Using scan tool MB991958, check data list item 
14: Throttle Position Sensor.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item 

14, Throttle Position Sensor.

• With the throttle valve in the idle position, voltage should 

measure between 0.535 and 0.735 volt.

• With the throttle valve in the full-open position, voltage 

should measure between 4.5 and 5.5 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

P.00-7

.

NO :  Replace the PCM. Then go to Step 14.

STEP 14. 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 P0121 set?

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

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-148

DTC P0122: Throttle Position Sensor Circuit Low Input

5V

GREEN-

YELL

OW

BL

ACK

GREEN-

WHITE

GREEN-

WHITE

BL

ACK

AK000443

Throttle Position Sensor (TPS) Circuit

POWERTRAIN CONTROL MODULE (PCM)

71

76

77

72 73 74

75

79 80

78

81

87 88

89

91

90

92

97

98

82

93

83

94

84 85

95

86

96

C-91
(MU803782)

1 2 3 4

A-41
(MU802724)

THROTTLE POSITION SENSOR

13

12

78

57

3

1

4

C-90

46

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)

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-71

AUTO-CRUISE CONTROL SYSTEM

C-91

JOINT
CONNEC-
TOR (4)

AK000363

AK104024

CONNECTOR: A-41

AB

THROTTLE
POSITION
SENSOR

A-41(B)

AK103738AE

CONNECTORS: C-90, C-91

PCM

C-91(GR)

C-90(GR)