Mitsubishi Colt Ralliart. Manual - part 715

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-185

STEP 12. Check and repair harness between 
B-121 (terminal No. 1) throttle valve control servo 
relay connector and B-106 (terminal No. 4) 
engine control relay connector.

• Check power supply line for damage.

Q:  Is the harness connector in good condition?

YES : 

Go to Step 13 .

NO : 

Repair the damaged harness wire.

AK402100

3

2

1

4

AC

Connector: B-121

J/B side 
connector

B-121

3

2

1

4

AK402084

J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-186

STEP 13. Check and repair harness between 
B-121 (terminal No. 2) throttle valve control servo 
relay connector and A-08 (terminal No. 123) 
engine-ECU connector.

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

• Check power supply line for damage.

Q:  Is the harness connector in good condition?

YES : 

Go to Step 14 .

NO : 

Repair the damaged harness wire.

AK402100

3

2

1

4

AC

Connector: B-121

J/B side 
connector

B-121

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

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-187

STEP 14. Check and repair harness between 
B-121 (terminal No. 4) throttle valve control servo 
relay connector and A-08 (terminal No. 78) 
engine-ECU connector.

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

• Check power supply line for damage.

Q:  Is the harness connector in good condition?

YES : 

Go to Step 15 .

NO : 

Repair the damaged harness wire.

STEP 15. M.U.T.-III diagnosis code.

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code set?

YES : 

Replace engine-ECU.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

AK402100

3

2

1

4

AC

Connector: B-121

J/B side 
connector

B-121

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

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-188

Code No. P1021: Oil Feeder Control Valve System

OPERATION

• Power is supplied to the oil feeder control valve 

(terminal No. 1) from the battery.

• The engine-ECU (terminal No. 52) energizes the 

oil feeder control valve (terminal No. 2) by turning 
on the power transistor in the unit

AK402694

3

1

2

4

1 2

19

21

20

18

17

16

15

14

1213

11

8 9

L

10

37
52 53 54 555657585960616263646566

38 39 404142434445464748495051

22 23 24 252627282930313233343536

7

5

3

1

6

4

2

4

6

Engine
control
relay

R

R

W-B

B-106

B-112

B-108

A-17

Oil feeder control valve

3

1

4

1

2

52

2

Oil Feeder Control Valve Circuit

A-114

A-101

MU802779

Engine-ECU

To engine-ECU

Wire colour code
B: Black  LG: Light green  G: Green  L: Blue  W: White  Y: Yellow  SB: Sky blue  BR: Brown  O: Orange  GR: Gray
R: Red  P: Pink  V: Violet

  P: Purple

1

1

R

Fusible link

16

20A

J/B

AE

Main

Index

Group

TOC