Mitsubishi Colt Ralliart. Manual - part 747

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-313

STEP 18. Check harness between B-114 (terminal 
No. 2) cooling fan control relay (LO) connector 
and A-08 (terminal No. 95) engine-ECU 
connector.

NOTE: Before checking harness, check intermediate 
connector B-110 and repair if necessary.

• Check signal line for damage.

Q: Is the check result normal?

YES : 

Go to Step 19 .

NO : 

Repair.

AK402106

3

2

1

4

AC

Connector: B-114

J/B side 
connector

B-114

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

90

91

100

101

102

103

104

105

106

115

116

117

118

119

120

121

107

108

109

110

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112

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114

130

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133

134

135

136

122

123

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125

126

127

128

129

72 71

74 73

76 75

R

AI

A-08

Connector: 

A-08

A-08 Special tool power plant ECU check 
harness

Engine-ECU

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-314

STEP 19. Check harness between B-127 (terminal 
No. 2) cooling fan control relay (HI) connector 
and A-08 (terminal No. 96) engine-ECU 
connector.

NOTE: Before checking harness, check intermediate 
connector B-112 and repair if necessary.

• Check signal line for damage.

Q: Is the check result normal?

YES : 

Go to Step 20 .

NO : 

Repair.

STEP 20. Perform resistance measurement at 
A-20 cooling fan motor connector.

•

Disconnect connector and measure at harness side.

• Resistance between terminal No. 2, No. 4 and 

earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 22 .

NO : 

Go to Step 21 .

3

2

1

4

AK402107

J/B side 
connector

Connector: B-127
J/B (front side)

AC

B-127

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

90

91

100

101

102

103

104

105

106

115

116

117

118

119

120

121

107

108

109

110

111

112

113

114

130

131

132

133

134

135

136

122

123

124

125

126

127

128

129

72 71

74 73

76 75

R

AI

A-08

Connector: 

A-08

A-08 Special tool power plant ECU check 
harness

Engine-ECU

Battery

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-315

STEP 21. Connector check: A-31 joint connector

Q: Is the check result normal?

YES : 

a. Check and repair harness between A-20 

(terminal No. 2) cooling fan motor 
connector and A-31 (terminal No. 2) joint 
connector.

b. Check and repair harness between A-20 

(terminal No. 4) cooling fan motor 
connector and A-31 (terminal No. 5) joint 
connector.

• Check earthing line for damage.

NO : 

Repair or replace.

STEP 22. Check harness between B-114 (terminal 
No. 4) cooling fan control relay (LO) connector 
and A-20 (terminal No. 1) cooling fan motor 
connector.

NOTE: Before checking harness, check intermediate 
connector B-109 and repair if necessary.

• Check power supply line for open/short circuit or 

damage.

Q: Is the check result normal?

YES : 

Go to Step 23 .

NO : 

Repair.

AK402209

3

2 1

6

5 4

Connector: A-31

Harness side 
connector

A-31(G)

AC

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

AK402106

3

2

1

4

AC

Connector: B-114

J/B side 
connector

B-114

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-316

STEP 23. Check harness between B-127 (terminal 
No. 4) cooling fan control relay (HI) connector 
and A-20 (terminal No. 3) cooling fan motor 
connector.

NOTE: Before checking harness, check intermediate 
connector B-109 and repair if necessary.

• Check power supply line for open/short circuit or 

damage.

Q: Is the check result normal?

YES : 

Go to Step 24 .

NO : 

Repair.

STEP 24. M.U.T.-III actuator test

• Refer to Actuator Test Reference Table 

P.13B-344

.

a. Item 20: Cooling fan motor (HI)
b. Item 21: Cooling fan motor (LO)

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

NO : 

Replace engine-ECU.

3

2

1

4

AK402107

J/B side 
connector

Connector: B-127
J/B (front side)

AC

B-127

AK402108

2 1

4 3

AC

Connector: A-20

Harness side connector

A-20

Main

Index

Group

TOC