Mitsubishi Eclipse. Manual - part 353

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-905

19

19

Volume airflow 
sensor reset 
signal

Engine: idling

0 

− 1 volt

Engine: 3,000 r/min

6 

− 9 volts

21

18

Fan controller

Radiator fan and condenser fan are not 
operating

0 

− 0.3 volt

Radiator fan and condenser fan are operating 0.7 volt or more

22

21

Fuel pump relay

Ignition switch: "ON"

B+

Engine: idling

1 volt or less

24

61

A/C switch 2

Engine: idling 
Outside air 
temperature: 
25

°C or more

when A/C is MAX. COOL 
condition (when the load 
by A/C is high)

1 volt or less

when A/C is MAX. HOT 
condition (when the load 
by A/C is low)

B+

33

8

Generator G 
terminal

Engine: warming up, idling (radiator fan: 
stopped) 
Headlight: OFF to ON
Rear defogger switch: OFF to ON
Stoplight switch: OFF to ON

Voltage rises by 
0.2 

− 3.5 volts

36

22

Malfunction 
Indicator Lamp 
(SERVICE 
ENGINE SOON 
or Check Engine 
Lamp)

Ignition switch: "LOCK" (OFF) 

→ "ON"

1 volt or less 

→ 

9 

− 13 volts 

(after several 
seconds have 
elapsed)

37

52

Power steering 
pressure switch

Engine: warming 
up, idling

When steering wheel is 
stationary

B+

When steering wheel is 
turned

1 volt or less

38

49

MFI relay (power 
supply)

Ignition switch: "OFF"

B+

Ignition switch: "ON"

1 volt or less

41

54

Generator FR 
terminal

Engine: warming up, idling (radiator fan: 
stopped) Headlight: OFF to ON

Voltage drops

Rear defogger switch: OFF to ON Stop light 
switch: OFF to ON

45

83

A/C switch

Engine: idling

Turn the A/C switch OFF

1 volt or less 

Turn the A/C switch ON 
(A/C compressor is 
operating)

B+

54

26

Heated oxygen 
sensor heater 
(rear)

Engine: warming up, idling

1 volt or less

Engine: Revving

B+

TERMINAL 
NO. <M/T>

TERMINAL 
NO. <A/T>

INSPECTION ITEM INSPECTION CONDITION (ENGINE CONDITION) NORMAL 

CONDITION

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-906

55

35

Evaporative 
emission 
ventilation 
solenoid

Ignition switch: "ON"

B+

Carry out the Actuator test to drive the 
solenoid valve

For 
approximately 
Six seconds 1 
volt or less

58

43

Tachometer 
signal

Engine: 3,000 r/min

0.3 

− 3.0 volt

60

3

Heated oxygen 
sensor heater 
(front)

Engine: warming up, idling

9 

− 11 volts

Engine: Revving

9 

− 11 volts → 

B+ 
(momentarily)

61

92

Fuel tank 
differential 
pressure sensor

Engine: idling

1.2 

− 3.8 volts

71

58

Ignition switch-ST Engine: cranking

8 V or more

72

64

Intake air 
temperature 
sensor

Ignition switch: 
"ON"

When Intake air 
temperature is 

−20°C 

(

−4°F)

3.8 

− 4.4 volts

When Intake air 
temperature is 0

°C (32°F)

3.2 

− 3.8 volts

When Intake air 
temperature is 20

°C (68°F)

2.3 

− 2.9 volts

When Intake air 
temperature is 40

°C 

(104

°F)

1.5 

− 2.1 volts

When Intake air 
temperature is 60

°C 

(140

°F)

0.8 

− 1.4 volts

When Intake air 
temperature is 80

°C 

(176

°F)

0.4 

− 1.0 volt

73

91

Manifold absolute 
pressure sensor

Ignition switch: 
ON

When altitude is 0m (0 ft.)

3.8 

− 4.2 volts

When altitude is 600m 
(1,969 ft.)

3.5 

− 3.9 volts

When altitude is 1,200m 
(3,937 ft.)

3.3 

− 3.7 volts

When altitude is 1,800m 
(5,906 ft.)

3.0 

− 3.4 volts

Engine: idling

0.8 

− 4.2 volts

While engine is idling after having warmed up, 
suddenly depress the accelerator pedal

Vries

75

73

Heated oxygen 
sensor (rear)

• Engine: warming up

• Revving

0 and 0.6 

− 1.0 

volt alternates

TERMINAL 
NO. <M/T>

TERMINAL 
NO. <A/T>

INSPECTION ITEM INSPECTION CONDITION (ENGINE CONDITION) NORMAL 

CONDITION

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-907

76

71

Heated oxygen 
sensor (front)

• Engine: warming, 2,500 r/min (check using 

a digital type voltmeter)

0 

⇔ 0.8 volt 

(changes 
repeatedly) 

77

51

Fuel tank 
temperature 
sensor

Ignition switch: 
"ON"

When fuel tank 
temperature is 0

°C (32°F)

2.7 

− 3.1 volts

When fuel tank 
temperature is 20

°C (68°F)

2.1 

− 2.5 volts

When fuel tank 
temperature is 40

°C 

(104

°F)

1.6 

− 2.0 volts

When fuel tank 
temperature is 80

°C 

(176

°F)

0.8 

− 1.2 volts

80

66

Backup power 
supply

Ignition switch: "LOCK" (OFF)

B+

81

46

Sensor supplied 
voltage

Ignition switch: "ON"

4.5 

− 5.5 volts

82

98

Ignition switch-IG Ignition switch: "ON" 

B+

83

44

Engine coolant 
temperature 
sensor

Ignition switch: 
"ON"

When engine coolant 
temperature is 

−20°C 

(

−4°F)

3.9 

− 4.5 volts

When engine coolant 
temperature is 0

°C (32°F)

3.2 

− 3.8 volts

When engine coolant 
temperature is 20

°C (68°F)

2.3 

− 2.9 volts

When engine coolant 
temperature is 40

°C 

(104

°F)

1.3 

− 1.9 volts

When engine coolant 
temperature is 60

°C 

(140

°F)

0.7 

− 1.3 volts

When engine coolant 
temperature is 80

°C 

(176

°F)

0.3 

− 0.9 volt

84

78

Throttle position 
sensor

Ignition switch: 
"ON" (check for 
smooth voltage 
increase as 
throttle is moved 
from idle position 
to wide open 
throttle)

Idle

0.335 

− 0.935 

volt

Wide open throttle

4.4 

− 5.3 volts

TERMINAL 
NO. <M/T>

TERMINAL 
NO. <A/T>

INSPECTION ITEM INSPECTION CONDITION (ENGINE CONDITION) NORMAL 

CONDITION

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-908

TERMINAL RESISTANCE AND CONTINUITY CHECK

85

55

Barometric 
pressure sensor

Ignition switch: 
"ON"

When altitude is 0 m (0 ft)

3.7 

− 4.3 volts

When altitude is 600 m 
(1,969 ft)

3.4 

− 4.0 volts

When altitude is 1,200 m 
(3,937 ft)

3.2 

− 3.8 volts

When altitude is 1,800 m 
(5,906 ft)

2.9 

− 3.5 volts

86

−

Vehicle speed 
sensor

• Ignition switch: "ON" 

• Move the vehicle slowly forward

0 

⇔ 8 − 12 

volts (changes 
repeatedly)

87

79

Idle position 
signal

Ignition switch: 
"ON" 

Set throttle valve to idle 
position

0 

− 1 volt

Open throttle slightly

4 volts or more

88

56

Camshaft position 
sensor

Engine: cranking

0.4 

− 3.0 volts

Engine: idling

1.5 

− 3.0 volts

89

45

Crankshaft 
position sensor

Engine: cranking

0.4 

− 4.0 volts

Engine: idling

1.5 

− 2.5 volts

90

65

Volume airflow 
sensor

Engine: idling

2.2 

− 3.2 volts

Engine: 2,500 r/min

TERMINAL 
NO. <M/T>

TERMINAL 
NO. <A/T>

INSPECTION ITEM INSPECTION CONDITION (ENGINE CONDITION) NORMAL 

CONDITION

AK000058

ECM <M/T> or PCM <A/T> Connector Terminal Arrangement

AB

<M/T>

<A/T>

13 12 11 10

9

8

7

6

5

4

3

2

1

26 25 24 23 22 21 20 19

38 37 36

35 34

33 32 31

35 34 33 32 31

46 45 44 43 42 41

56 55 54 53 52 51

62 61 60 59 58

75 74 73 72 71

80

81

79 78 77 76

86 85 84 83 82

91

92

90 89 88 87

57

40 39

18 17 16 15 14

13 12 11 10

9

8

7

6

5

4

3

2

1

26

27

28

29

30

25

24

23

58

59

60

61

62

63

64

65

66

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

90

91

92

93

94

95

96

97

98

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

101

102

103

104

105

106

107

108

121

122

123

124

125

126

127

128

129

130

109

110

111

112

113

114

115

116

117

118

119

120

22 21 20 19 18 17 16

14

15

TERMINAL 
NO.

TERMINAL 
NO.

INSPECTION ITEM

NORMAL CONDITION (INSPECTION 
CONDITION)

1 

− 12

1 

− 41

No. 1 injector

13 

− 16 ohms [at 20°C (68°F)]

14 

− 12

9 

− 41

No. 2 injector

2 

− 12

24 

− 41

No. 3 injector

15 

− 12

2 

− 41

No. 4 injector

4 

− 12

14 

− 41

Stepper motor coil (A1)

28 

− 33 ohms [at 20°C (68°F)]

17 

− 12

28 

− 41

Stepper motor coil (A2)

5 

− 12

15 

− 41

Stepper motor coil (B1)

18 

− 12

29 

− 41

Stepper motor coil (B2)

6 

− 12

6 

− 41

EGR vacuum regulator solenoid valve 29 

− 35 ohms [at 20°C (68°F)]