Mitsubishi Montero (2004+). Manual - part 364

 

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Mitsubishi Montero (2004+). Manual - part 364

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-943

STEP 3. Check the circuit at PCM connector D-134.
(1) Disconnect the connectors D-134 and measure at the 

harness side.

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

(3) Measure the voltage between terminal No. 69 and ground.

• Voltage should be 1 volt or less when the A/C switch is 

"OFF".

• Voltage should be battery positive voltage when the A/C 

switch is "ON".

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Replace the PCM. Then confirm that the malfunction 

symptom is eliminated.

NO :  Refer to GROUP 55, Diagnosis 

− Introduction To 

Heater, Air Conditioning And Ventilation Diagnosis 

P.55A-5

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

61

62

63

64

65

66

67

68

69

70

71

76

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85

86

87

80

72

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89

AK201388

D-134 HARNESS 

CONNECTOR: 

COMPONENT SIDE

AK201388AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-944

INSPECTION PROCEDURE 33: Accelerator Pedal Position Switch

.

CIRCUIT OPERATION

• A 5-volt voltage is applied on the accelerator 

pedal position switch output terminal (terminal 
No. 4) from the PCM (terminal No. 38) via the 
resistor in the PCM.

• The ground terminal (terminal No.5) is grounded 

with PCM (terminal No.96).

.

YELLO

W

-BLA

CK

BLA

CK

AK201165

ACCELERATOR PEDAL 

POSITION

SWITCH (BUILT INTO 

ACCELERATOR 

PEDAL 

POSITION SENSOR)

POWERTRAIN CONTROL MODULE(PCM)

5V

96

38

4

5

D-138 

(MU802073)

31

35363738394041 42 43
444546474849

50 51

5253

545556

57 58

32

33 34

9192

939495

96979899

100

105

113114

115116117

118119120

106

107108109

110111112

101102103

104

D-133

(MU803803)

D-135

(MU803805)

Accelerator Pedal Position Switch Circuit

6 7 8

1 2 3 4 5

AK200944AC

CONNECTOR: D-138

ACCELERATOR
PEDAL 
POSITION 
SWITCH

D-138(GR)

AK201038AL

CONNECTORS: D-133, D-135

PCM

D-135(GR)

D-133(GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-945

COMMENT

• Accelerator pedal position switch turns OFF 

when the amount of travel of the accelerator 
pedal exceeds the prescribed value.

• PCM uses the signal that is input by the accelera-

tor pedal position switch for determining the 
abnormal characteristics of the accelerator pedal 
position sensor (sub).

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are: )

• Accelerator pedal position switch failed.

• Open or shorted accelerator pedal position switch 

circuit, or loose connector.

• PCM failed.

DIAGNOSIS

STEP 1. Check connector D-138 at accelerator pedal 
position switch for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

STEP 2. Check the accelerator pedal position switch.
(1) Disconnect the accelerator pedal position switch connector 

D-138.

(2) Check for continuity between the accelerator pedal position 

switch side connector terminal No. 4 and No. 5.

• There should be continuity when the accelerator pedal 

is not depressed. (400 ohms or less)

• There should be continuity when the accelerator pedal 

is depressed.

Q: Does continuity exist?

YES : Go to Step 3.
NO :  Replace the accelerator pedal position sensor 

P.17-8

After converting the accelerator pedal position sensor, 
adjust the accelerator pedal position sensor 

P.13A-994

. Confirm that the malfunction symptom is 

eliminated.

AK200945

3

4

5

1

2

8

6

7

AB

CONNECTOR: D-138

HARNESS 
CONNECTOR: 
COMPONENT SIDE

D-138(GR)

AK200945

3

4

5

1

2

8

6

7

AB

CONNECTOR: D-138

HARNESS 
CONNECTOR: 
COMPONENT SIDE

D-138(GR)

1 2 3 4 5 6 7 8

AK201309 AC

Equipment side
connector

ACCELERATOR PEDAL
POSITION SWITCH

ACCELERATOR 
PEDAL

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-946

STEP 3. Measure the switch supply voltage at accelerator 
pedal position switch connector D-138.
(1) Disconnect the accelerator pedal position switch connector 

D-138.

(2) Measure the voltage between terminal No. 4 and ground.

• Voltage should be 4 volts or more.

Q: Is the voltage normal?

YES : Go to Step 6.
NO :  Go to Step 4.

STEP 4. Check connector D-133 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 5.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Confirm that the 

malfunction system is eliminated.

AK200945

3

4

5

1

2

8

6

7

AB

CONNECTOR: D-138

HARNESS 
CONNECTOR: 
COMPONENT SIDE

D-138(GR)

3

4

5

1

2

8

6

7

AK201398

D-138 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201398AB

AK200939

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32

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38

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51

AB

CONNECTOR: D-133

HARNESS CONNECTOR: 
COMPONENT SIDE

PCM

D-133(GR)

 

 

 

 

 

 

 

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