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 register the ID codes again (Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE  .). Retest the system.

   NO:  Go to Step 3.

   Fig 3: Connecting Terminal 60 To Ground

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3. STEP 3. Check ETACS-ECU connector C-218 and combination meter connector C-101 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-101 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-218 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Identifying Connector C-101 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Check the wiring harness between combination meter connector C-101 (terminal 19) and ETACS-ECU connector C-218 (terminal 60). 

   Q: Is the wiring harness between combination meter connector C-101 (terminal 19) 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-101 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-101 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-101, and measure at the wiring harness side.
      Fig 8: Identifying Connector C-101 Terminals

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   3. Measure the voltage between terminal 1 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.

   Fig 9: Measuring Voltage Between Terminal 1 And Ground

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
6. STEP 6. Check combination meter connector C-101 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Is combination meter connector C-101 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-101 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
7. STEP 7. Check the wiring harness between combination meter connector C-101 (terminal 1) and the battery. 
   Fig 11: Identifying Connector C-101 Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: Also check joint connector C-01 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-29 is damaged, repair or replace it. Refer to HARNESS CONNECTOR INSPECTION .

   Q: Is the wiring harness between combination meter connector C-101 (terminal 1) and the battery in good condition? 

   YES:  Go to Step 8.

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

   Fig 12: Locating Intermediate Connector C-29 And Joint Connector C-01

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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.