Mitsubishi Lancer Evolution IX. Manual — part 465
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-335
• Voltage between terminal No. 2 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Check and repair harness between A-06X
(terminal No. 3) condenser fan relay (low)
connector and C-121 (terminal No. 31)
engine-ECU connector.
• Check power supply for open circuit.
STEP 12. Connector check: A-34 condenser fan
motor connector.
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair or replace the connector.
STEP 13. Check harness between A-06X
(terminal No. 3) condenser fan relay (low)
connector and C-121 (terminal No. 31)
engine-ECU connector.
NOTE: Before checking harness, check intermediate
connector A-29*
1
or C-31*
2
, and repair if necessary.
• Check output line for damage.
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Repair the damaged harness wire.
AK305266
1
2
A-34(B)
AB
Harness side
connector
Connector: A-34
AK305265
2
1
3
4
Relay box's
triangle marks
AB
A-06X
Harness side
connector
Connector: A-06X
AK501995
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
Connector: C-121
C-121 (GR)
C-121 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-336
STEP 14. M.U.T.-II/III actuator test
• Item No. 38: Condenser fan (high)
OK: Condenser fan motor rotates (high
speed)
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Go to Step 15 .
STEP 15. Connector check: A-07X condenser fan
relay (high) connector.
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Repair or replace the connector.
STEP 16. Check condenser fan relay (high).
• Check condenser fan relay (high) (Refer to
GROUP 55
− On-vehicle Service
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Replace the condenser fan relay (high).
STEP 17. Perform voltage measurement at A-07X
condenser fan relay (high) connector.
• Remove relay, and measure at relay box side.
• Ignition switch: "ON"
• Voltage between terminal No. 2 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 20 .
NO :
Go to Step 18 .
AK305267
2
1
3
4
A-07X
Connector: A-07X
AB
Harness side
connector
Relay box’s
triangle marks
AK305267
2
1
3
4
A-07X
Connector: A-07X
AB
Harness side
connector
Relay box’s
triangle marks
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-337
STEP 18. Connector check: C-208 ignition switch
connector.
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Repair or replace the connector.
STEP 19. Check ignition switch.
• Check ignition switch (Refer to GROUP 54 − igni-
tion switch
).
Q: Is the check result normal?
YES :
Check intermediate connectors C-101,
C-129, C-210 and C-211 and repair if
necessary. If intermediate connectors are
normal, check and repair harness between
A-07X (terminal No. 2) condenser fan relay
(high) connector and C-208 (terminal No. 4)
ignition switch connector.
• Check power supply for open circuit
and damage.
NO :
Replace the ignition switch.
AK305251
1
2
3
4
5
6
Harness side connector
Connector: C-208
C-208
<L. H. drive vehicles>
<R. H. drive vehicles>
C-208
AB
AK305267
2
1
3
4
A-07X
Connector: A-07X
AB
Harness side
connector
Relay box’s
triangle marks
AK305251
1
2
3
4
5
6
Harness side connector
Connector: C-208
C-208
<L. H. drive vehicles>
<R. H. drive vehicles>
C-208
AB
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-338
STEP 20. Perform voltage measurement at A-07X
condenser fan relay (high) connector.
• Remove relay, and measure at relay box side.
• Voltage between terminal No. 4 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Check and repair harness between battery
and A-07X (terminal No. 4) condenser fan
relay (high) connector.
• Check power supply for open circuit
and damage.
NO :
Go to Step 21 .
STEP 21. Perform voltage measurement at C-121
engine-ECU connector.
• Measure engine-ECU terminal voltage.
• Ignition switch: "ON"
• Voltage between terminal No. 30 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 23 .
NO :
Go to Step 22 .
AK305267
2
1
3
4
A-07X
Connector: A-07X
AB
Harness side
connector
Relay box’s
triangle marks
AK501995
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
Connector: C-121
C-121 (GR)
C-121 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
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