Mitsubishi Colt Ralliart. Manual — part 169
TROUBLESHOOTING <CVT>
CVT
23A-19
(4) Use the special tool Check connector to measure
the voltage between engine-CVT-ECU connector
A-114 terminal No.18 and earth.
OK:
• 3.8 − 4.0 V (CVT fluid temperature at
20
°C)
• 3.2 − 3.4 V (CVT fluid temperature at
40
°C)
• 1.7 − 1.9 V (CVT fluid temperature at
80
°C)
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Go to Step 13.
STEP 12. 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
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50
51
52
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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 7.
NO :
Repair the defective connector.
STEP 13. 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
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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 14.
NO :
Repair the defective connector.
Main
Index
Group
TOC
TROUBLESHOOTING <CVT>
CVT
23A-20
STEP 14. Check the harness between CVT
control solenoid valve assembly connector A-117
terminal No.1 and engine-CVT-ECU connector
A-114 terminal No.18.
AC314190
AC
Inhibitor switch
Transmission
control cable
A-117 (GR)
Connector: A-117
Harness side
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
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40
41
42
43
44
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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 :
Go to Step 7.
NO :
Repair the wiring harness.
Main
Index
Group
TOC
TROUBLESHOOTING <CVT>
CVT
23A-21
Code No.18, 19 Line Pressure Sensor System
ENGINE-
CVT-ECU
LINE PRESSURE
SENSOR
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
Line Pressure Sensor System Circuit
AC405419AB
OPERATION
The line pressure sensor detects the fluid pressure
applied to the secondary pulley, and sends the infor-
mation to the engine-CVT-ECU.
DIAGNOSIS CODE SET CONDITIONS
• If the line pressure sensor output voltage is 0.2 V
or less while the engine is running (engine speed
is 450 r/min or more, and the relay voltage is 10 V
or more), code No.18 will be set.
• If the line pressure sensor output voltage is 4.7 V
or more (fluid pressure is approximately 6.8 MPa
or more) while the engine is idling (engine speed
is 450
− 1,000 r/min, and the relay voltage is 10 V
or more, code No.19 will be set.
PROBABLE CAUSES
• Malfunction of line pressure sensor
• Damaged harness wires and connectors
• Malfunction of the engine-CVT-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III data list
Item 09: Line pressure sensor (Refer to Data List
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
TROUBLESHOOTING <CVT>
CVT
23A-22
STEP 2. Connector check: A-113 line pressure
sensor connector.
AC314193
Connector: A-113
AB
A-113 (B)
Transmission
control cable
1
2
3
Harness side
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the defective connector.
STEP 3. Measure the resistance at line pressure
sensor connector A-113.
AC314193
Connector: A-113
AB
A-113 (B)
Transmission
control cable
1
2
3
Harness side
Disconnect the connector, and measure the resist-
ance between terminal 3 and earth at the wiring har-
ness side.
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Go to Step 4.
STEP 4. Measure the voltage at engine-CVT-ECU
connector A-114.
(1) Connect line pressure sensor connector A-113.
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
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22
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24
25
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31
32
33
34
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39
40
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44
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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) Turn the ignition switch to the ON position.
(4) Use the special tool Check connector to measure
the voltage between engine-CVT-ECU connector
A-114 terminal No.26 and earth.
OK: 0.5 V or less
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Go to Step 5.
Main
Index
Group
TOC
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