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
).
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
).
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
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
).
NO :
Go to Step 2.
Main
Index
Group
TOC
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