Mitsubishi Lancer Evolution IX. Manual — part 446
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-259
STEP 7. Connector check: C-208 ignition switch
connector and B-21 starter connector
Q: Is the check result normal?
YES :
Check intermediate connectors C-123 and
B-14, and repair if necessary. If intermediate
connectors are normal, check and repair
harness between C-208 (terminal No. 5)
ignition switch connector and B-21 (terminal
No. 1) starter connector.
• Check output line for short circuit.
NO :
Repair or replace the connector.
STEP 8. Connector check: B-21 starter connector
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Repair or replace the connector.
STEP 9. Perform voltage measurement at B-21
starter connector.
• Disconnect connector, and measure at the har-
ness side.
• Ignition switch: ST
• Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Go to Step 10 .
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
AK305254
1
B-21(B)
AB
Harness side
connector
Connector: B-21
AK305254
1
B-21(B)
AB
Harness side
connector
Connector: B-21
AK305254
1
B-21(B)
AB
Harness side
connector
Connector: B-21
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-260
STEP 10. Connector check: C-208 ignition switch
connector
Q: Is the check result normal?
YES :
Check intermediate connectors B-14 and
C-123, and repair if necessary. If
intermediate connectors are normal, check
and repair harness between C-208 (terminal
No. 5) ignition switch connector and B-21
(terminal No. 1) starter connector.
• Check output line for open circuit and
damage.
NO :
Repair or replace the connector.
STEP 11. Connector check: B-19 starter
connector
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Repair or replace the connector.
STEP 12. Perform voltage measurement at B-19
starter connector.
• Disconnect connector, and measure at the har-
ness side.
• Voltage between terminal No. 1 and earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Check and repair harness between B-19
(terminal No. 1) starter connector and
battery.
• Check power supply line for
open/short circuit.
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
AK305254
1
B-21(B)
AB
Harness side
connector
Connector: B-21
AK502004
1
AB
Connector: B-19
B-19 (B)
Harness side
connector
AK502004
1
AB
Connector: B-19
B-19 (B)
Harness side
connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-261
STEP 13. Check harness between C-208 (terminal
No. 5) ignition switch connector and B-21
(terminal No. 1) starter connector.
NOTE: Before checking harness, check intermediate
connectors B-14 and C-123, and repair if necessary.
• Check output line for damage.
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Repair the damaged harness wire.
STEP 14. Check harness between B-19 (terminal
No. 1) starter connector and battery.
• Check power supply line for damage.
Q: Is the check result normal?
YES :
Replace the starter.
NO :
Repair the damaged harness wire.
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
AK305254
1
B-21(B)
AB
Harness side
connector
Connector: B-21
AK502004
1
AB
Connector: B-19
B-19 (B)
Harness side
connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-262
Inspection Procedure 6: Starting impossible (Starter Operative but No Initial Combustion)
OPERATION
• Refer to inspection procedure, ignition circuit sys-
tem <L. H. drive vehicles>
circuit system <R. H. drive vehicles>
COMMENTS ON TROUBLE SYMPTOM
• Failure is possibly caused by failed ignition cir-
cuit, failed fuel feed or other faults.
PROBABLE CAUSES
• Failed battery
• Timing belt broken
• Failed idle speed control
• Throttle valve fouled around
• Failed ignition system
• Failed fuel system
• Failed immobilizer system
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check battery voltage.
• Measure battery voltage at cranking.
OK: 8 V or higher
Q: Is the check result normal?
YES :
Go to Step 2 .
NO :
Check battery (Refer to GROUP 54A
−
Battery
− On-vehicle Service − Battery test
).
STEP 2. Check engine warning lamp for burnt out
bulb
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Check engine-ECU power supply, engine
control relay and ignition switch IG1 system
(Refer to Inspection Procedure 23
).
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 actuator test
• Item No. 07: Fuel pump
OK: Operating sound of fuel pump can be
heard.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Check fuel pump system (Refer to
Inspection Procedure 24
STEP 5. Check timing belt for breakage.
• Engine: Cranking
OK: Camshaft rotates.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Replace the timing belt.
STEP 6. Check the engine start ability.
• With depressing the accelerator pedal slightly,
and start the engine.
Q: Is the start ability good?
YES :
Go to Step 7 .
NO :
Go to Step 8 .
STEP 7. Check idling speed control 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 8. M.U.T.-II/III data list
• Item No. 18: Cranking signal
OK:
ON (Ignition switch: ST)
OFF (Ignition switch: ON)
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Go to Step 9 .
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