Mitsubishi Lancer Evolution IX. Manual — part 433
![](/vehicles/winoney/wruvea/ger/lat.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-207
STEP 11. Check harness between B-25 (terminal
No. 4) alternator connector and B-14 (terminal
No. 5) intermediate connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair the damaged harness wire.
STEP 12. Check harness between B-14 (terminal
No. 5) intermediate connector and C-119
(terminal No. 52) engine-ECU connector.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair the damaged harness wire.
STEP 13. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the alternator.
NO :
Intermittent malfunction (Refer to Group 00
− How to Use troubleshooting/Inspection
Service Points
AK305036
M
2
1
3
4
Harness side
connector
AB
Connector : B-25
B-25(GR)
AK305035
3
4
5
8
9
1
2
6
7
10
Connector : B-14
Female side
connector
B-14(B)
AC
AK401753
1
2 3
6
7 8
4 5
9 10
Connector : B-14
Male side
connector
B-14(B)
AB
AK501994
65
43
50
42
49
41
48
60
61
64
46
47
58
59
67
68
45
56
66
52 51
44
53
62
54
63
57
55
AB
Connector: C-119
C-119 (GR)
C-119 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
![](/vehicles/winoney/wruvea/ger/ply.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-208
Code No. P0710: Transmisson Oil Temperature Sensor System
OPERATION
• A power voltage of 5 V is applied to the transmis-
sion oil temperature sensor output terminal (ter-
minal No. 1) from the engine-ECU (terminal No.
96).
• The power voltage is earthed to the engine-ECU
(terminal No. 49) from the transmission oil tem-
perature sensor (terminal No. 2).
FUNCTION
• The transmission oil temperature sensor converts
the transmission oil temperature into a voltage
signal, and inputs the voltage to the engine-ECU.
• The engine-ECU controls the boost pressure,
based on this signal.
• The transmission oil temperature sensor is a kind
of resistor, which has characteristics to reduce its
resistance as the transmission oil temperature
rises. Therefore, the sensor output voltage varies
with the transmission oil temperature, and
becomes lower as the transmission oil tempera-
ture rises.
TROUBLE JUDGMENT
Check Conditions
• 2 seconds later after the ignition switch has been
in "ON" position or the engine has started up.
• The engine coolant temperature of 82°C or more.
Judgment Criteria
• The sensor output voltage of 4.8 V or more
(transmission oil temperature of
−40°C or equiva-
lent) for 2 seconds,
or
1 2
AK501821
65
43
50
42
49
41
48
60 61
64
46 47
58 59
67 68
45
56
66
52
51
44
53
62
54
63
57
55
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97
96
100
89
78
71
90
76 77
75
72
79
5 V
49
96
B
B
G-R
G-R
Engine-ECU
Transmission oil temperature sensor
B-30
(MU802406)
2
1
2
1
Transmission oil temperature sensor circuit
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 PU: Purple
C-119
(MU803782)
AB
B-27
C-117
(MU803783)
![](/vehicles/winoney/wruvea/ger/jounganton.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-209
• The sensor output voltage of 0.1 V or less (trans-
mission oil temperature of 150
°C or more, or
equivalent) for 2 seconds.
PROBABLE CAUSES
• Failed transmission oil temperature sensor
• Open/short circuit in transmission oil temperature
sensor circuit or loose connector contact
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Connector check: B-30 transmission oil
temperature sensor connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace the connector.
STEP 2. Perform resistance measurement at B-30
transmission oil temperature sensor connector.
• Disconnect connector, and measure at sensor
side.
• Resistance between terminal No. 1 and No. 2.
OK:
Transmission oil temperature at
−20°C: 14 − 17
k
Ω
Transmission oil temperature at 0
°C: 5.1 − 6.5
k
Ω
Transmission oil temperature at 20
°C: 2.1 − 2.7
k
Ω
Transmission oil temperature at 40
°C: 0.9 − 1.3
k
Ω
Transmission oil temperature at 60
°C: 0.48 −
0.68 k
Ω
Transmission oil temperature at 80
°C: 0.26 −
0.36 k
Ω
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Replace the transmission oil temperature
sensor.
AK502000
1
2
AB
Connector: B-30
B-30 (B)
Harness side
connector
AK502000
1
2
AB
Connector: B-30
B-30 (B)
Harness side
connector
![](/vehicles/winoney/wruvea/ger/xceshecharen.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-210
STEP 3. Perform voltage measurement at B-30
transmission oil temperature sensor connector.
• Disconnect connector, and measure at harness
side.
• Ignition switch: "ON"
• Voltage between terminal No. 1 and earth.
OK: 4.5
− 4.9 V
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 4 .
STEP 4. Perform voltage measurement at C-117
engine-ECU connector.
• Measure engine-ECU terminal voltage.
• Disconnect B-30 transmission oil temperature
sensor.
• Ignition switch: "ON"
• Voltage between terminal No. 96 and earth.
OK: 4.5
− 4.9 V
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Go to Step 6 .
AK502000
1
2
AB
Connector: B-30
B-30 (B)
Harness side
connector
AK501996
80
87
81
94
85
82
84
93
86
98
99
74
92
73
83
88
91
95
97 96
100
89
78
71
90
76
77
75
72
79
AB
Connector: C-117
C-117 (GR)
C-117 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
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