Mitsubishi Lancer Evolution IX. Manual — part 395
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-55
STEP 6. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between B-107
(terminal No. 1) engine coolant temperature
sensor connector and C-119 (terminal No.
44) engine-ECU connector.
• Check output line for open circuit.
NO :
Repair or replace the connector.
STEP 7. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Repair or replace the connector.
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>
AK305008
1
2
AB
Connector : B-107
Harness side
connector
B-107(B)
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>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-56
STEP 8. Check harness between B-107 (terminal
No. 1) engine coolant temperature sensor
connector and C-119 (terminal No. 44)
engine-ECU connector.
• Check output line for short circuit.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
STEP 9. M.U.T.-II/III data list
• Item No. 21: Engine coolant temperature sensor
OK:
Engine cold state: At ambient temperature or
equivalent.
Engine hot state: At 80
− 120°C
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
NO :
Replace the engine-ECU.
STEP 10. Perform resistance measurement at
B-107 engine coolant temperature sensor
connector.
• Disconnect connector and measure at harness
side.
• Resistance between terminal No. 2 and earth.
OK: 2
Ω or less
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Go to Step 11 .
AK305008
1
2
AB
Connector : B-107
Harness side
connector
B-107(B)
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>
AK305008
1
2
AB
Connector : B-107
Harness side
connector
B-107(B)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-57
STEP 11. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair or replace the connector.
STEP 12. Check harness between B-107 (terminal
No. 2) engine coolant temperature sensor
connector and C-119 (terminal No. 49)
engine-ECU connector.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair the damaged harness wire.
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>
AK305008
1
2
AB
Connector : B-107
Harness side
connector
B-107(B)
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>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-58
STEP 13. Perform voltage measurement at B-107
engine coolant temperature sensor connector.
• Use special tool test harness (MB991658) to con-
nect connector, and measure at pick-up harness.
• Ignition switch: "ON"
• Voltage between terminal No. 1 and earth.
OK:
Engine coolant temperature at
−20°C: 3.9 − 4.5
V
Engine coolant temperature at 0
°C: 3.2 − 3.8 V
Engine coolant temperature at 20
°C: 2.3 − 2.9
V
Engine coolant temperature at 40
°C: 1.3 − 1.9
V
Engine coolant temperature at 60
°C: 0.7 − 1.3
V
Engine coolant temperature at 80
°C: 0.3 − 0.9
V
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Go to Step 14 .
STEP 14. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Repair or replace the connector.
AK305008
1
2
AB
Connector : B-107
Harness side
connector
B-107(B)
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>
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