Mitsubishi Colt Ralliart. Manual - part 679

 

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Mitsubishi Colt Ralliart. Manual - part 679

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-41

STEP 9. Perform voltage measurement at A-08 
engine-ECU connector.

• Disconnect engine-ECU connector, and connect 

special tool power plant ECU check harness 
(MB991987) and measure the voltage on the 
check connector.

• Disconnect A-34 air flow sensor connector.

• Ignition switch: ON

• Voltage between terminal No. 129 and earth.

OK: 4.5 

 4.9 V

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Go to Step 11 .

STEP 10. Connector check: A-08 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check and repair harness between A-34 

(terminal No. 1) air flow sensor connector 
and A-08 (terminal No. 129) engine-ECU 
connector.

• Check output line for open circuit.

NO : 

Repair or replace.

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

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101

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103

104

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106

115

116

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121

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108

109

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112

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136

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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

AK402083

2

1

3

4

Connector: A-34

Harness side 

connector

A-34 (GR)

AC

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

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88

89

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91

100

101

102

103

104

105

106

115

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117

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114

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136

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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

AK402083

2

1

3

4

Connector: A-34

Harness side 

connector

A-34 (GR)

AC

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-42

STEP 11. Connector check: A-08 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Repair or replace.

STEP 12. Check harness between A-34 (terminal 
No. 1) air flow sensor connector and A-08 
(terminal No. 129) engine-ECU connector.

• Check output line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair.

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

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116

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119

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121

107

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109

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131

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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

AK402083

2

1

3

4

Connector: A-34

Harness side 

connector

A-34 (GR)

AC

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-43

STEP 13. Perform voltage measurement at A-34 
air flow sensor connector.

• Use special tool test harness (MB991709) to con-

nect connector only terminal No. 1 and No. 4, and 
then measure at pick-up harness.

• Ignition switch: ON

• Voltage between terminal No. 1 and earth.

OK:

Ambient temperature at 

20°C: 3.8  4.4 V

Ambient temperature at 0

°C: 3.2  3.8 V

Ambient temperature at 20

°C: 2.3  2.9 V

Ambient temperature at 40

°C: 1.5  2.1 V

Ambient temperature at 60

°C: 0.8  1.4 V

Ambient temperature at 80

°C: 0.4  1.0 V

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Go to Step 14 .

STEP 14. Connector check: A-08 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Repair or replace.

AK402083

2

1

3

4

Connector: A-34

Harness side 

connector

A-34 (GR)

AC

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

87

88

89

90

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100

101

102

103

104

105

106

115

116

117

118

119

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121

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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-44

STEP 15. Check harness between A-34 (terminal 
No. 1) air flow sensor connector and A-08 
(terminal No. 129) engine-ECU connector.

• Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Repair.

STEP 16. Connector check: A-08 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check harness between A-34 (terminal No. 

4) air flow sensor connector and A-08 
(terminal No. 102) engine-ECU connector.

• Check earthing line for damage.

NO : 

Repair or replace.

AK402083

2

1

3

4

Connector: A-34

Harness side 

connector

A-34 (GR)

AC

AK402725

77

78

79

80

81

82

83

84

92

93

94

95

96

97

98

99

85

86

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88

89

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100

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102

103

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105

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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

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

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119

120

121

107

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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

AK402083

2

1

3

4

Connector: A-34

Harness side 

connector

A-34 (GR)

AC

Main

Index

Group

TOC

 

 

 

 

 

 

 

Content   ..  677  678  679  680   ..