Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 333

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-531

CHECK AT THE ENGINE CONTROL MODULE (ECM) <M/T> OR POWERTRAIN
CONTROL MODULE (PCM) <A/T>

M1131027400028

TERMINAL VOLTAGE CHECK CHART

AK000057

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

<M/T>

<A/T>

AB

1

2

3

4

5

6

7

8

41

48 49 50 51 52 53 54 55 56 57 58

60 61

62 63 64

65 66

67

42 43 44

45 46

59

68

47

41

47

48 49 50 51 52 53 54 55 56 57

58

59

60 61 62 63

64 65

42 43

71

78 79 80

90 91

72

81

92

82

93

83 84

94

85

95

86

96

74

88

97

76

89

98

77

108

121

101

109

122

110

123

102

112

124

113114

125

115

126

116

127

117

128

104

119

129

106

120

130

107

118

105

111

103

87

75

73

44 45 46

66

78

91

71

79

92

80

93

83 84

95

85

96

86

97

87

98

72

82

94

74

89

99

76

90

100

77

88

75

81

73

9

10

11 12 13 14 15 16 17 18 19 20 21 22 23

24

25

26 27 28 29

30 31 32 33

34 35

1

2

3

4

5

6

7

8

9

10

11 12 13 14 15 16 17 18 19 20 21 22 23

24

25

26 27 28 29

30 31 32 33

34 35

TERMINAL
NO. <M/T>

TERMINAL
NO. <A/T>

INSPECTION ITEM

INSPECTION CONDITION (ENGINE CONDITION)

NORMAL
CONDITION

1

1

No.1 injector

•

Engine: warming up, idling

•

Suddenly depress the accelerator pedal

From 11

−

14 V

momentarily
drops slightly

99No.2 injector

24

24

No.3 injector

2

2

No.4 injector

10

10

No.5 injector

25

25

No.6 injector

3

3

Left bank heated
oxygen sensor
heater (front)

Engine: warming up, idling

9

−

11 V

Engine: Revving

9

−

11 V

→

B+

(momentarily)

4

4

Right bank heated
oxygen sensor
heater (front)

Engine: warming up, idling

9

−

11 V

Engine: Revving

B+

6

6

EGR solenoid

Ignition switch: "ON"

B+

•

Engine: idling

•

Suddenly depress the accelerator pedal.

From B+, drops
momentarily

8

8

Generator G
terminal

•

Engine: warming up, idling (radiator fan:
stopped)

•

Headlight: OFF to ON

•

Rear defogger switch: OFF to ON

•

Stop light switch: OFF to ON

Voltage rises by
0.2

−

3.5 V

52

54

Generator FR
terminal

•

Engine: warming up, idling (radiator fan:
stopped)

•

Headlight: OFF to ON

•

Rear defogger switch: OFF to ON

•

Stop light switch: OFF to ON

Voltage drops

11

11

Ignition power
transistor

Engine: 3,000 r/min

0.3

−

3.0 V

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-532

14

14

Stepper motor coil
<A1>

•

Engine: warming up, idling

•

A/C switch: OFF

→

ON

•

Headlight switch: OFF

→

ON

B+

⇔

1 V or less

(changes
repeatedly)

28

28

Stepper motor coil
<A2>

15

15

Stepper motor coil
<B1>

2929Stepper motor coil

<B2>

18

18

Fan controller

Radiator fan and A/C condenser fan are not
operating

0

−

0.3V

Radiator fan and A/C condenser fan are
operating

0.7 V or more

1919Volume air flow

sensor reset signal

Engine: idling

0

−

1 V

Engine: 3,000 r/min

6

−

9 V

21

21

Fuel pump relay

Ignition switch: "ON"

B+

Engine: idling

0

−

3V

20

20

A/C compressor
clutch relay

•

Engine: idling

•

A/C switch: OFF

→

ON (A/C compressor

is operating)

B+

→

1 v or less

as A/C clutch
cycles

22

22

Service engine
soon/malfunction
indicator lamp

Ignition switch: "OFF"

→

"ON"

1 V or less

→

9

−

13 V (after
several seconds
have elapsed)

26

26

Left bank heated
oxygen sensor
heater (rear)

Engine: warming up, idling

1 V or less

Engine: Revving

B+

27

27

Right bank heated
oxygen sensor
heater (rear)

Engine: warming up, idling

1 V or less

Engine: Revving

B+

16

34

Evaporative
emission purge
solenoid

Ignition switch: "ON"

B+

Engine: warm up, 3,000 r/min

3

−

13 V

35

35

Evaporative
emission
ventilation solenoid

Ignition switch: "ON"

B+

Carry out the Actuator test to drive the
solenoid valve

For approx. six
seconds 1 V or
less

5941

Power supply

Ignition switch: "ON"

B+

45

43

Spark check signal Engine: 3,000 r/min

8

−

12 V

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) <3.0L ENGINE>

13B-533

44

44

Engine coolant
temperature
sensor

Ignition switch:
"ON"

When engine coolant
temperature is 0

°

C (32

°

F)

3.2

−

3.8 V

When engine coolant
temperature is 20

°

C

(68

°

F)

2.3

−

2.9 V

When engine coolant
temperature is 40

°

C

(104

°

F)

1.3

−

1.9 V

When engine coolant
temperature is 80

°

C

(176

°

F)

0.3

−

0.9 V

43

45

Crankshaft
position sensor

Engine: cranking

0.4

−

4.0 V

Engine: idling

1.5

−

2.5 V

42

46

Sensor supplied
voltage

Ignition switch: "ON"

4.5

−

5.5 V

47

41

Power supply

Ignition switch: "ON"

B+

5947

57

49MFI relay (power

supply)

Ignition switch: "OFF"

B+

Ignition switch: "ON"

1V or less

54

52

Power steering
pressure switch

Engine: warming
up, idling

When steering wheel is
stationary

B+

When steering wheel is
turned

1V or less

51

55

Barometric
pressure sensor

Ignition switch:
"ON"

When altitude is 0 m (0 ft) 3.7

−

4.3 V

When altitude is 600 m
(1,969 ft)

3.4

−

4.0 V

When altitude is 1,200 m
(3,937 ft)

3.2

−

3.8 V

When altitude is 1,800 m
(5,906 ft)

2.9

−

3.5 V

50

56

Camshaft position
sensor

Engine: cranking

0.4

−

3.0 V

Engine: idling

0.5

−

2.0 V

68

58

Ignition switch-ST

Engine: cranking

8 V or more

65

61

A/C switch 2

•

Engine: idling

•

Outside air
temperature:
25

°

C or more

When A/C is maximum
cooling condition (when
the load by A/C is high)

B+

When A/C is maximum
heating condition (when
the load by A/C is low)

1 V or less

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) <3.0L ENGINE>

13B-534

62

64

Intake air
temperature
sensor

Ignition switch:
"ON"

When Intake air
temperature is 0

°

C (32

°

F)

3.2

−

3.8 V

When Intake air
temperature is 20

°

C

(68

°

F)

2.3

−

2.9 V

When Intake air
temperature is 40

°

C

(104

°

F)

1.5

−

2.1 V

When Intake air
temperature is 80

°

C

(176

°

F)

0.4

−

1.0 V

61

65

Volume air flow
sensor

Engine: idling

2.2

−

3.2 V

Engine: 2,500 r/min

60

66

Backup power
supply

Ignition switch: "OFF"

B+

71

71

Left bank heated
oxygen sensor
(front)

•

Engine: warming up, 2,500 r/min (check
using a digital voltmeter)

0

⇔

0.8 V

(changes
repeatedly)

72

72

Right bank heated
oxygen sensor
(front)

•

Engine: warming up, 2,500 r/min (check
using a digital voltmeter)

0

⇔

0.8 V

(changes
repeatedly)

73

73

Left bank heated
oxygen sensor
(rear)

•

Engine: warming up

•

Revving

0 and 0.6

−

1.0 V

alternates

74

74

Right bank heated
oxygen sensor
(rear)

•

Engine: warming up

•

Revving

0 and 0.6

−

1.0 V

alternates

78

78

Throttle position
sensor

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

Idling

0.535

−

0.735 V

Wide open throttle

4.5

−

5.5 V

7979Idle position signal Ignition switch:

"ON"

Set throttle valve to idle
position

0

−

1 V

Open throttle slightly

4 V or more

80

80

Vehicle speed
sensor

•

Ignition switch: "ON"

•

Move the vehicle slowly forward

0

⇔

8 -12 V

(changes
repeatedly)

83

83

A/C switch

Engine: idling

Turn the A/C switch OFF

1V or less

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

B+

TERMINAL
NO. <M/T>

TERMINAL
NO. <A/T>

INSPECTION ITEM

INSPECTION CONDITION (ENGINE CONDITION)

NORMAL
CONDITION