Mitsubishi Colt Ralliart. Manual — part 183
TROUBLESHOOTING <CVT>
CVT
23A-75
STEP 15. Measure the voltage at
engine-CVT-ECU connector A-114.
(1) Connect primary pressure sensor connector
A-118.
AC403088AF
A-114
Connector: A-114
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
A-114 Check connector (special tool)
Engine-CVT-ECU
Battery
(GR)
(2) Disconnect the engine-CVT-ECU connector, and
connect the special tool Power plant ECU check
harness (MB991987).
(3) Let the engine run at idle.
(4) Shift the selector lever to the P range.
(5) Close the accelerator pedal fully.
(6) Use the special tool Check connector to measure
the voltage between engine-CVT-ECU connector
A-114 terminal No.41 and earth.
OK: 0.5
− 0.9 V
Q: Is the check result normal?
YES : .
Go to Step 18.
NO : .
Go to Step 16.
STEP 16. Connector check: A-114
engine-CVT-ECU connector.
AC403088AG
A-114
Connector: A-114
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
A-114 Harness side connector
Engine-CVT-ECU
Battery
(GR)
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 17.
NO :
Repair the defective connector.
Main
Index
Group
TOC
TROUBLESHOOTING <CVT>
CVT
23A-76
STEP 17. Check the harness between primary
pressure sensor connector A-118 terminal No.2
and engine-CVT-ECU connector A-114 terminal
No.41.
AC206690
AF
Connector: A-118
A-118 (B)
Harness side
1
2
3
AC403088AG
A-114
Connector: A-114
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
A-114 Harness side connector
Engine-CVT-ECU
Battery
(GR)
Check the output line for short-circuited or open cir-
cuit.
Q: Is the check result normal?
YES :
Replace the primary pressure sensor.
).
NO :
Repair the wiring harness.
STEP 18. Connector check: A-114
engine-CVT-ECU connector.
AC403088AG
A-114
Connector: A-114
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
A-114 Harness side connector
Engine-CVT-ECU
Battery
(GR)
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
Main
Index
Group
TOC
TROUBLESHOOTING <CVT>
CVT
23A-77
Code No.31 Line Pressure Control Solenoid Valve System
CVT CONTROL
SOLENOID
VALVE
ASSEMBLY
CLUTCH
PRESSURE
CONTROL
SOLENOID
VALVE
SHIFT
CONTROL
SOLENOID
VALVE
DAMPER
CLUTCH
CONTROL
SOLENOID
VALVE
LINE
PRESSURE
CONTROL
SOLENOID
VALVE
ENGINE-
CVT-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
Solenoid Valve System Circuit
AC405424
OPERATION
The line pressure control solenoid valve controls the
fluid pressure applied on the secondary pulley by
using the signal from the engine-CVT-ECU.
DIAGNOSIS CODE SET CONDITIONS
If the line pressure control solenoid valve driving volt-
age is 3 V or less, code No.31 will be set.
PROBABLE CAUSES
• Malfunction of line pressure control solenoid
valve
• Damaged harness wires and connectors
• Malfunction of the engine-CVT-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q: Are diagnosis codes 33, 37 set?
YES :
Go to Step 9.
NO :
Go to Step 2.
Main
Index
Group
TOC
TROUBLESHOOTING <CVT>
CVT
23A-78
STEP 2. M.U.T.-III actuator test
Item 01: Line pressure control solenoid valve
OK: Operating sound can be heard.
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
− How to Cope with Intermittent
).
NO :
Go to Step 3.
STEP 3. Connector check: A-117 CVT control
solenoid valve assembly connector.
AC314190
AC
Inhibitor switch
Transmission
control cable
A-117 (GR)
Connector: A-117
Harness side
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
STEP 4. Measure the resistance at CVT control
solenoid valve assembly connector A-117.
AC314190
AC
Inhibitor switch
Transmission
control cable
A-117 (GR)
Connector: A-117
Harness side
Disconnect the connector, and measure the resist-
ance between terminal 6 and 10 at the solenoid
valve side.
OK: 2.9
− 3.5 Ω (CVT fluid temperature at
20
°C)
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the line pressure control solenoid
valve. (Refer to
STEP 5. Measure the voltage at engine-CVT-ECU
connector A-114.
(1) Connect CVT control solenoid valve assembly
connector A-117.
AC403088AF
A-114
Connector: A-114
6
4
2
5
3
1
9
7
8
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
L
A-114 Check connector (special tool)
Engine-CVT-ECU
Battery
(GR)
(2) Disconnect the engine-CVT-ECU connector, and
connect the special tool Power plant ECU check
harness (MB991987).
(3) Let the engine run at idle.
(4) Shift the selector lever to the P range.
(5) Use the special tool Check connector to measure
the voltage between engine-CVT-ECU connector
A-114 terminal No.4 and earth.
OK: 10
− 11 V
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Go to Step 6.
Main
Index
Group
TOC
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