Mitsubishi Lancer Evolution IX. Manual - part 443

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-247

STEP 6. Connector check: C-121 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair or replace the connector.

STEP 7. Perform voltage measurement at C-121 
engine-ECU connector.

• Disconnect connector, and measure at the har-

ness side.

• Ignition switch: "ON"

• Voltage between terminal No. 22 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Go to Step 8 .

AK501995

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AB

Connector: C-121

C-121 (GR)

C-121 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK501995

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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-248

STEP 8. Connector check: C-01 combination 
meter connector

Q: Is the check result normal?

YES : 

Check intermediate connector C-124, and 

repair if necessary. If intermediate 
connector is normal, check and repair 
harness between C-01 (terminal No. 17) 
combination meter connector and C-121 
(terminal No. 22) engine-ECU connector.

• Check output line for open/short 

circuit.

NO : 

Repair or replace the connector.

AK301236

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Harness side connector

Connector: C-01

C-01

<L. H. drive vehicles>

<R. H. drive vehicles>

C-01 

AC

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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-249

STEP 9. Connector check: C-208 ignition switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair or replace the connector.

AK305251

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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-250

STEP 10. Check harness between C-01 (terminal 
No. 9) combination connector and C-208 
(terminal No. 2) ignition switch connector.

NOTE: Before checking harness, check intermediate 
connectors C-23 <L.H. drive vehicles>, C-211and 
C-214, and repair if necessary.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the damaged harness wire.

AK301236

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Harness side connector

Connector: C-01

C-01

<L. H. drive vehicles>

<R. H. drive vehicles>

C-01 

AC

AK305251

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Harness side connector

Connector: C-208

C-208

<L. H. drive vehicles>

<R. H. drive vehicles>

C-208

AB