INSPECTION PROCEDURE 3: The Immobilizer Indicator Light does not Illuminate: Diagnosis

Required Special Tool: 

• MB991223: Harness Set

1. STEP 1. Check ETACS-ECU connector C-218 for loose, corroded or damaged terminals, or terminals pushed back in the connector 

   Q: Is ETACS-ECU connector C-218 in good condition? 

   YES:  Go to Step  2.

   NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . Confirm that scan tool MB991958 communicates normally.

   Fig 1: Identifying Connector C-218 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Check the immobilizer indicator light circuit of ETACS-ECU connector C-218. 
   1. Disconnect the ETACS-ECU connector C-218 and measure at the harness side.
   2. Turn the ignition switch to the "ON" position.
      Fig 2: Identifying Connector C-218 Terminals

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   3. Connect terminal 60 to the ground.

   Q: Does only the immobilizer indicator light illuminate? (other indicator lights are in good condition) 

   YES:  Replace the ETACS-ECU, and then record the VIN. Then, register the encrypted code again (Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE ). Retest the system.

   NO:  Go to Step  3.

   Fig 3: Connecting Terminal 60 To Ground

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. STEP 3. Check ETACS-ECU connector C-218 and combination meter connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are ETACS-ECU connector C-218 and combination meter connector C-04 in good condition? 

   YES:  Go to Step  4.

   NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . Confirm that the immobilizer indicator light illuminates normally.

   Fig 4: Identifying Connector C-04 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Identifying Connector C-218 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Check the wiring harness between combination meter connector C-04 (terminal 5) and ETACS-ECU connector C-218 (terminal 60). 

   Q: Is the wiring harness between combination meter connector C-04 (terminal 5) and ETACS-ECU connector C-218 (terminal 60) in good condition? 

   YES:  Go to Step  5.

   NO:  Repair the wiring harness. Confirm the immobilizer indicator light illuminates normally.

   Fig 6: Identifying Connector C-04 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 7: Identifying Connector C-218 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
5. STEP 5. Measure the voltage at combination meter connector C-04 in order to check the battery circuit of power supply system to the combination meter. 
   1. Turn the ignition switch to the "LOCK" (OFF) position.
   2. Disconnect combination meter connector C-04, and measure at the wiring harness side.
      Fig 8: Identifying Connector C-04 Terminals

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      Fig 9: Measuring Voltage Between Terminal 10 And Ground

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   3. Measure the voltage between terminal 10 and ground.
      • The measured value should be approximately 12 volts (battery positive voltage).

   Q: Is measured voltage approximately 12 volts? 

   YES:  Go to Step  8.

   NO:  Go to Step  6.

6. STEP 6. Check combination meter connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Is combination meter connector C-04 in good condition? 

   YES:  Go to Step  7.

   NO:  Repair or replace the component(s). Refer to HARNESS CONNECTOR INSPECTION . Confirm the immobilizer indicator light illuminates normally.

   Fig 10: Identifying Connector C-04 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
7. STEP 7. Check the wiring harness between combination meter connector C-04 (terminal 10) and the battery. 
   Fig 11: Locating Combination Meter Connector C-04 And Intermediate Connector C-24

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: Also check intermediate connector C-24 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 is damaged, repair or replace it. Refer to HARNESS CONNECTOR INSPECTION .

   Q: Is the wiring harness between combination meter connector C-04 (terminal 10) and the battery in good condition? 

   YES:  Go to Step  8.

   NO:  Repair the wiring harness. Check to see that all meters operate.

8. STEP 8. Retest the system. 

   Q: Is the malfunction eliminated? 

   YES:  The procedure is complete. (If no malfunctions are found in all steps, an intermittent malfunction is suspected. Refer to "How to Use Troubleshooting/inspection Service Points - HOW TO COPE WITH INTERMITTENT MALFUNCTIONS " ).

   NO:  Replace the combination meter.