Mitsubishi Colt Ralliart. Manual - part 190

TROUBLESHOOTING <CVT>

CVT

23A-103

(3) Use the special tool Check connector to measure 

the voltage between engine-CVT-ECU connector 
A-08 terminal No.128 and earth.

OK:

Brake pedal depressed: System voltage
Brake pedal not depressed: 1 V or less

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Go to Step 10.

STEP 8. Connector check: A-08 engine-CVT-ECU 
connector.

AC403088AH

A-08

Connector: A-08

A-08 Harness side connector

Engine-CVT-ECU

Battery

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

(GR)

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the defective connector.

STEP 9. M.U.T.-III data list
Item 33: Stop lamp switch (Refer to data list refer-
ence table 

P.23A-123

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Replace the engine-CVT-ECU.

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

AC403088AH

A-08

Connector: A-08

A-08 Harness side connector

Engine-CVT-ECU

Battery

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

(GR)

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the defective connector.

Main

Index

Group

TOC

TROUBLESHOOTING <CVT>

CVT

23A-104

STEP 11. Check the harness between stop lamp 
switch connector B-27 terminal No.1 and 
engine-CVT-ECU connector A-08 terminal 
No.128.

AC208412

4

3

2

1

AB

Brake pedal

Connector: B-27

Harness side

AC403088AH

A-08

Connector: A-08

A-08 Harness side connector

Engine-CVT-ECU

Battery

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

(GR)

Check the output line for short-circuited or open cir-
cuit.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the wiring harness.

STEP 12. Connectors check: B-108, B-112 J/B 
connector.

AC313825AL

Connectors: B-108, B-112

Junction Block (Front view)

B-112

B-108 (B)

Harness side

B-108

Harness side

B-112

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 13.

NO : 

Repair the defective connector.

Main

Index

Group

TOC

TROUBLESHOOTING <CVT>

CVT

23A-105

STEP 13. Check the harness between stop lamp 
switch connector B-27 terminal No.2 and J/B 
connector B-108 terminal No.1.

AC208412

4

3

2

1

AB

Brake pedal

Connector: B-27

Harness side

AC313824 AG

Connector: B-108

Harness side

Junction block (Front view)

B-108 (B)

Check the power supply line for short-circuited or 
open circuit.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the wiring harness.

Main

Index

Group

TOC

TROUBLESHOOTING <CVT>

CVT

23A-106

Code No.56 CVT Control Relay System

ENGINE-
CVT-ECU

SOLENOID
VALVE POWER
SOURCE

CVT
CONTROL
RELAY

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

FUSIBLE
LINK

1

CVT Control Relay System Circuit

AC405413

OPERATION

If a fail-safe operation is activated, the CVT control 
relay shuts off the power supply to the solenoid valve 
in accordance with the signal from the 
engine-CVT-ECU.

DIAGNOSIS CODE SET CONDITIONS

Code No.56 will be set if the relay voltage is less 
than 7 V although the battery voltage is 9 V or more.

PROBABLE CAUSES

• Malfunction of CVT control relay

• Damaged harness wires and connectors

• Malfunction of the engine-CVT-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list
Item 25: Relay voltage (Refer to data list reference 
table 

P.23A-123

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Go to Step 2.

Main

Index

Group

TOC