Mitsubishi Lancer Evolution IX. Manual — part 447
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-263
STEP 9. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Check intermediate connector C-123, and
repair if necessary. If intermediate
connector is normal, check and repair
harness between C-208 (terminal No. 9)
ignition switch connector and C-119
(terminal No. 68) engine-ECU connector.
• Check output line for open/short
circuit.
NO :
Repair or replace the connector.
STEP 10. M.U.T.-II/III data list
• Refer to Data List Reference Table
.
a. Item No. 22: Crank angle sensor
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Check crank angle sensor system (Refer to
Code No. P0
AK501994
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46
47
58
59
67
68
45
56
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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>
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-264
STEP 11. Check injector for operating sound.
• Check injector for operating sound (Refer to
).
Q: Can operating sound be heard?
YES :
Go to Step 12 .
NO :
Check the injector system of the defective
cylinder
(Refer to Code No. 0201: No. 1 injector system
).
(Refer to Code No. 0202: No. 2 injector system
).
(Refer to Code No. 0203: No. 3 injector system
).
(Refer to Code No. 0204: No. 4 injector system
).
STEP 12. Check ignition coil spark
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Check ignition circuit system (refer to
inspection procedure 30 <L. H. drive
vehicles>
or inspection
procedure 31 <R. H. drive
vehicles>
STEP 13. Replace the engine-ECU.
• After replacing the engine-ECU, re-check the
trouble symptoms.
Q: Does trouble symptom persist?
YES :
Check for foreign matters (water, kerosene,
etc.) in fuel and replace if necessary.
NO :
The check is end.
Inspection Procedure 7: Starting Impossible (Initial Combustion but no Complete Combustion),
Starting (Long Time to Start)
COMMENTS ON TROUBLE SYMPTOM
• Failure is possibly caused by poor ignition, incor-
rect air-fuel ratio at cranking, improper fuel pres-
sure or other faults.
PROBABLE CAUSES
• Failed battery
• Failed ignition system
• Failed fuel system
• Failed air-fuel ratio control system
• Failed idle speed control system
• Failed intake system
• Failed exhaust gas cleaning system
• Throttle valve fouled around
• Timing belt not in place
• Compression pressure improper
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check battery condition.
Q: Have the battery terminal been disconnected?
YES :
After warm-up engine, idle for about 10
minutes.
NO :
Go to Step 2 .
STEP 2. Check battery voltage.
• Measure battery voltage at cranking.
OK: 8 V or higher
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Check battery (Refer to GROUP 54A
−
Battery
− On-vehicle Service − Battery Test
).
STEP 3. M.U.T.-II/III diagnosis code
Q: Diagnosis code set?
YES :
Inspection chart for diagnosis codes (Refer
to
NO :
Go to Step 4 .
STEP 4. M.U.T.-II/III data list
• Refer to Data List Reference Table
.
a. Item No. 13: Intake air temperature sensor
b. Item No. 21: Engine coolant temperature sen-
sor
c. Item No. 25: Barometric pressure sensor
Q: Are the check results normal?
YES :
Go to Step 5 .
NO :
Perform the diagnosis code classified check
procedure for the sensor that has shown an
abnormal data value (Refer to Inspection
Chart for Diagnosis Codes
).
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-265
STEP 5. Check start ability.
• With depressing the accelerator pedal slightly,
and start the engine.
Q: Is the start ability good?
YES :
Go to Step 6 .
NO :
Go to Step 7 .
STEP 6. Check idle speed control servo for
operating sound.
• Check idle speed control servo for operating
sound (Refer to
).
Q: Is the check result normal?
YES :
Clean throttle body (throttle valve portion)
).
NO :
Check idle speed control servo system
(Refer to Code No. P0505
STEP 7. M.U.T.-II/III actuator test
• Refer to Actuator Test Reference Table
.
a. Item No. 07: Fuel pump
OK: Operating sound of fuel pump can be
heard.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Check fuel pump system (Refer to
Inspection Procedure 24
STEP 8. Check air intake from intake hose and
intake manifold.
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair.
STEP 9. Check injector for operating sound.
• Check injector for operating sound at engine
cranking (Refer to
Q: Can operating sound be heard?
YES :
Go to Step 10 .
NO :
Check the injector system of the defective
cylinder
(Refer to Code No. 0201: No. 1 injector system
).
(Refer to Code No. 0202: No. 2 injector system
).
(Refer to Code No. 0203: No. 3 injector system
).
(Refer to Code No. 0204: No. 4 injector system
).
STEP 10. Check timing marks of timing belt.
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Align timing marks.
STEP 11. Perform voltage measurement at C-119
engine-ECU connector.
• Measure engine-ECU terminal voltage.
• Voltage between terminal No. 46 and earth also
between terminal No. 58 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Go to Step 12 .
AK501994
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60
61
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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-266
STEP 12. Connector check: C-119 engine-ECU
connector
Q: Is the check result normal?
YES :
Check and repair harness between C-119
(terminal No. 46 and No. 58) engine-ECU
connector and body earth.
• Check earth line for open circuit and
damage.
NO :
Repair or replace the connector.
STEP 13. Connector check: B-103 and B-114
ignition coil connectors.
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Repair or replace the connector.
STEP 14. Check ignition coil spark.
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Go to Step 15 .
STEP 15. Check spark plug.
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Replace the spark plug.
STEP 16. Check spark plug cable itself.
• Check spark plug cable itself (Refer to GROUP
16
− Ignition System − On-vehicle Service
).
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Replace the spark plug cable.
STEP 17. Check ignition coil itself.
• Check ignition coil itself (Refer to GROUP 16 −
Ignition System
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Replace the ignition coil.
AK501994
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43
50
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49
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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>
AK305047
1
2
3
Connector : B-103, B-114
B-114(GR)
B-103(GR)
AB
Harness side
connector
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