Mitsubishi Lancer Evolution IX. Manual — part 441
![](/vehicles/winoney/wruvea/ger/oujud.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-239
STEP 5. Check harness between C-14 (terminal
No. 16) diagnosis connector and battery.
NOTE: Before checking harness, check intermediate
connectors C-126, C-211 and C-214, and repair if
necessary.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Check and repair harness between C-14
(terminal No. 4 and No. 5) diagnosis
connector and body earth.
• Check earthing line for damage.
NO :
Repair the damaged harness wire.
AK203591
1 2 3 4 5 6
12
11
10
1516
14
13
9
7 8
AD
Connector: C-14
Harness side connector
C-14 (B)
![](/vehicles/winoney/wruvea/ger/mam.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-240
Inspection Procedure 2: Communication with Engine-ECU only is not Possible.
OPERATION
• There is data communication between diagnosis
connector output terminal (terminal No. 7) and
engine-ECU (terminal No. 85).
COMMENTS ON TROUBLE SYMPTOM
• Failure is possibly caused by failed power supply
circuit or failed earthing circuit of engine-ECU.
1 2 3 4 5 6
12
11
10
1516
14
13
9
7 8
AK501824
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
Engine-ECU
J/C (2) <C-101> (*1) or <C-23> (*2)
C-14
85
O
O
O
O
9 (*1) or 14 (*2)
10
(*1) or 15 (*2)
7
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
AB
NOTE
*1: L.H. drive vehicles
*2: R.H. drive vehicles
Diagnosis connector circuit
Diagnosis connector
23
C-124
C-117
(MU803783)
O
20
19
*1
*2
J/C (6)
C-105
![](/vehicles/winoney/wruvea/ger/ure.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-241
PROBABLE CAUSES
• Open/short circuit in engine-ECU power circuit
• Short circuit in diagnosis connector circuit
• Failed engine-ECU
DIAGNOSIS PROCEDURE
NOTE:
.
*1: L.H. drive vehicles
*2: R.H. drive vehicles
STEP 1. Check engine warning lamp.
• Ignition switch: OFF → ON
Q: Is lamp illuminating for few seconds?
YES :
Go to Step 2 .
NO :
Check engine-ECU power supply, engine
control relay and ignition switch IG1 system
(Refer to Inspection Procedure 23
).
STEP 2. Connector check: C-117 engine-ECU
connector
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace the 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>
![](/vehicles/winoney/wruvea/ger/dyoued.png)
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-242
STEP 3. Check harness between C-14 (terminal
No. 7) diagnosis connector and C-117 (terminal
No. 85) engine-ECU connector.
NOTE: Before Checking harness, check intermedi-
ate connectors C-105*
1
, C-124 and C-101*
1
or
C-23*
2
, and repair if necessary.
• Check communication line for open/short circuit
and damage.
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Repair the damaged harness wire.
STEP 4. Check the trouble symptom.
Q: Does trouble symptom persist?
YES :
Replace the engine-ECU.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
AK203591
1 2 3 4 5 6
12
11
10
1516
14
13
9
7 8
AD
Connector: C-14
Harness side connector
C-14 (B)
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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