Mitsubishi Eclipse. Manual — part 634

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1079

FUEL
PUMP

07

Fuel pump Fuel pump

operates
and fuel is
recirculated

• Ignition

switch:
"ON"

• Fuel

pump:
activated

Inspect
according
to both the
above
conditions

Pinch the
return hose
with fingers
to feel the
pulse of the
fuel being
recirculated

Pulse is felt Procedure

No. 29

P.13B-103
0

Listen near
the fuel
tank for the
sound of
fuel pump
operation

Sound of
operation is
heard

NO. 1
INJECT
OR

01

Injectors

Cut fuel to
No. 1
injector

Engine: warm, idle (cut
the fuel supply to each
injector in turn and check
cylinders which don't
affect idling.)

Idling
condition
becomes
different
(becomes
unstable)

Code No.
P0201

P.13B-510

NO. 2
INJECT
OR

02

Cut fuel to
No. 2
injector

Code No.
P0202

P.13B-521

NO. 3
INJECT
OR

03

Cut fuel to
No. 3
injector

Code No.
P0203

P.13B-510

NO. 4
INJECT
OR

04

Cut fuel to
No. 4
injector

Code No.
P0204

P.13B-521

NO. 5
INJECT
OR

05

Cut fuel to
No. 5
injector

Code No.
P0205

P.13B-510

NO. 6
INJECT
OR

06

Cut fuel to
No. 6
injector

Code No.
P0206

P.13B-521

RADIAT
. FAN
LO

21

Fan
controller

Drive the
fan motor

Ignition switch: "ON"

Radiator fan
and A/C
condenser
fan rotate at
high speed

Procedure
No. 27

P.13B-100
8

VIC
SOLEN
OID

11

Intake
manifold
tuning
solenoid

Solenoid
valve turns
from OFF to
ON.

Ignition switch: "ON"

Clicks when
solenoid
valve is
driven

Code No.
P0660

P.13B-844

MUT-III
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

DRIVE
CONTENTS

INSPECTION
REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1080

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

M1131153700210

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

volts
momentarily
drops slightly

9

9

No.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 volts

Engine: Revving

9

− 11 volts →

B+
(momentarily)

4

4

Right bank
heated oxygen
sensor heater
(front)

Engine: warming up, idling

9

− 11 volts

Engine: Revving

B+

6

6

EGR vacuum
regulator solenoid
valve

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 volt

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 volt

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1081

14

14

Stepper motor
coil <A1>

• Engine: warming up, idling

• A/C switch: OFF → ON

• Headlight switch: OFF → ON

B+

⇔ 1 volt or

less (changes
repeatedly)

28

28

Stepper motor
coil <A2>

15

15

Stepper motor
coil <B1>

29

29

Stepper motor
coil <B2>

18

18

Fan controller

Radiator fan and A/C condenser fan are not
operating

0

− 0.3 volt

Radiator fan and A/C condenser fan are
operating

0.7 volt or more

19

19

Volume airflow
sensor reset
signal

Engine: idling

0

− 1 volt

Engine: 3,000 r/min

6

− 9 volts

21

21

Fuel pump relay

Ignition switch: "ON"

B+

Engine: idling

0

− 3 volts

20

20

A/C compressor
clutch relay

• Engine: idling

• A/C switch: OFF→ ON (A/C compressor is

operating)

B+

→ 1 volt or

less as A/C
clutch cycles

22

22

Malfunction
indicator lamp
(SERVICE
ENGINE SOON
or Check Engine
Lamp)

Ignition switch: "OFF"

→ "ON"

1 volt or less

→

9

− 13 volts

(after several
seconds have
elapsed)

26

26

Left bank heated
oxygen sensor
heater (rear)

Engine: warming up, idling

1 volt or less

Engine: Revving

B+

27

27

Right bank
heated oxygen
sensor heater
(rear)

Engine: warming up, idling

1 volt or less

Engine: Revving

B+

16

34

Evaporative
emission purge
solenoid

Ignition switch: "ON"

B+

Engine: warm up, 3,000 r/min

3

− 13 volts

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 volt
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>

13B-1082

44

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

43

45

Crankshaft
position sensor

Engine: cranking

0.4

− 4.0 volts

Engine: idling

1.5

− 2.5 volts

42

46

Sensor supplied
voltage

Ignition switch: "ON"

4.5

− 5.5 volts

47

41

Power supply

Ignition switch: "ON"

B+

59

47

57

49

MFI relay (power
supply)

Ignition switch: "OFF"

B+

Ignition switch: "ON"

1 volt or less

96

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

54

52

Power steering
pressure switch

Engine: warming
up, idling

When steering wheel is
stationary

B+

When steering wheel is
turned

1 volt or less

32

53

Intake manifold
tuning solenoid

Engine: iding

1 volt or less

Engine: 5,000 r/min

B+

TERMINAL
NO. <M/T>

TERMINAL
NO. <A/T>

INSPECTION ITEM INSPECTION CONDITION (ENGINE

CONDITION)

NORMAL
CONDITION