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Home >> Mitsubishi >> 2010 >> Lancer ES, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 58 (Door System - Lancer Evolution) >> Symptom Procedures - Central Door Locking System >> INSPECTION PROCEDURE 4: A Door Cannot Be Locked Or Unlocked By The Central Door Locking System >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2012 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
  1. STEP 1. Confirmation of the defective door lock actuator. 

    Q: Which door is not locked normally? 

    Driver's door:  Go to Step 2.

    Front passenger's door:  Go to Step  6.

    Rear right door:  Go to Step  10.

    Rear left door:  Go to Step  14.

  2. STEP 2. Check front door lock actuator (LH) connector E-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is front door lock actuator (LH) connector E-16 in good condition? 

    • YES:  Go to Step 3.
    • NO:  Repair or check the connector. Refer to HARNESS CONNECTOR INSPECTION . Verify that all the doors can be locked and unlocked normally.
  3. STEP 3. Check the front door lock actuator (LH). 

    Remove the front door lock actuator (LH). The illustration shows when the door lock actuator is viewed from inside the door. Refer to DOOR HANDLE AND LATCH  .

    LEVER POSITION AND BATTERY CONNECTION CHART

    Lever position Battery connection Lever operation
    At the "LOCK" position
    • Connect terminal No. 4 and the negative battery terminal.
    • Connect terminal No. 6 and the positive battery terminal.
    		 The lever moves from the "LOCK" position to the "UNLOCK" position.
    At the "UNLOCK" position
    • Connect terminal No. 6 and the negative battery terminal.
    • Connect terminal No. 4 and the positive battery terminal.
    		 The lever moves from the "UNLOCK" position to the "LOCK" position.
    Fig 1: Front Door Lock Actuator Lock To Unlock Position (LH)
    G05384058Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Does the front door lock actuator (LH) work normally? 

    • YES:  Go to Step 4.
    • NO:  Replace the front door lock actuator (LH). Verify that all the doors can be locked and unlocked normally.
  4. STEP 4. Check ETACS-ECU connector C-315 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is ETACS-ECU connector C-315 in good condition? 

    • YES:  Go to Step 5.
    • NO:  Repair or check the connector. Refer to HARNESS CONNECTOR INSPECTION . Verify that all the doors can be locked and unlocked normally.
  5. STEP 5. Check the wiring harness between ETACS-ECU connector C-315 (terminals Nos. 2, 6) and front door lock actuator (LH) connector E-16 (terminals Nos. 6, 4). 
    NOTE: Also check intermediate connector C-129 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-129 is damaged, repair or replace the damaged component(s) as described. Refer to HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between ETACS-ECU connector C-315 (terminals Nos. 2, 6) and front door lock actuator (LH) connector E-16 (terminals Nos. 6, 4) in good condition? 

    • YES:  Go to Step  18.
    • NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair or replace the damaged component(s). Verify that all the doors can be locked and unlocked normally.
  6. STEP 6. Check front door lock actuator (RH) connector E-07 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is front door lock actuator (RH) connector E-07 in good condition? 

    • YES:  Go to Step 7.
    • NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Verify that all the doors can be locked and unlocked normally.
  7. STEP 7. Check the front door lock actuator (RH). 

    Remove the front door lock actuator (RH). The illustration shows when the door lock actuator is viewed from inside the door. Refer to DOOR HANDLE AND LATCH  .

    LEVER POSITION AND BATTERY CONNECTION CHART

    Lever position Battery connection Lever operation
    At the "LOCK" position
    • Connect terminal No. 4 and the negative battery terminal.
    • Connect terminal No. 6 and the positive battery terminal.
    		 The lever moves from the "LOCK" position to the "UNLOCK" position.
    At the "UNLOCK" position
    • Connect terminal No. 6 and the negative battery terminal.
    • Connect terminal No. 4 and the positive battery terminal.
    		 The lever moves from the "UNLOCK" position to the "LOCK" position.
    Fig 2: Front Door Lock Actuator Lock To Unlock Position (RH)
    G05384059Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the front door lock actuator (RH) normal? 

    • YES:  Go to Step 8.
    • NO:  Replace the front door lock actuator (RH). Verify that all the doors can be locked and unlocked normally.
  8. STEP 8. Check ETACS-ECU connector C-315 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is ETACS-ECU connector C-315 in good condition? 

    • YES:  Go to Step 9.
    • NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Verify that all the doors can be locked and unlocked normally.
  9. STEP 9. Check the wiring harness between ETACS-ECU connector C-315 (terminals Nos. 5, 6) and front door lock actuator (RH) connector E-07 (terminals Nos. 6, 4). 
    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 the damaged component(s) as described. Refer to HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between ETACS-ECU connector C-315 (terminals Nos. 5, 6) and front door lock actuator (RH) connector E-07 (terminals Nos. 6, 4) in good condition? 

    • YES:  Go to Step  18.
    • NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that all the doors can be locked and unlocked normally.
  10. STEP 10. Check rear door lock actuator (RH) connector E-19 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is rear door lock actuator (RH) connector E-19 in good condition? 

    • YES:  Go to Step 11.
    • NO:  Repair or check the connector. Refer to HARNESS CONNECTOR INSPECTION . Verify that all the doors can be locked and unlocked normally.
  11. STEP 11. Check the rear door lock actuator (RH). 

    Remove the rear door lock actuator (RH). The illustration shows when the door lock actuator is viewed from inside the door. Refer to DOOR HANDLE AND LATCH  .

    LEVER POSITION AND BATTERY CONNECTION CHART

    Lever position Battery connection Lever operation
    At the "LOCK" position
    • Connect terminal No. 4 and the negative battery terminal.
    • Connect terminal No. 6 and the positive battery terminal.
    		 The lever moves from the "LOCK" position to the "UNLOCK" position.
    At the "UNLOCK" position
    • Connect terminal No. 6 and the negative battery terminal.
    • Connect terminal No. 4 and the positive battery terminal.
    		 The lever moves from the "UNLOCK" position to the "LOCK" position.
    Fig 3: Rear Door Lock Actuator Lock To Unlock Position (RH)
    G05384060Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the rear door lock actuator (RH) normal? 

    • YES:  Go to Step 12.
    • NO:  Replace the rear door lock actuator (RH). Verify that all the doors can be locked and unlocked normally.
  12. STEP 12. Check ETACS-ECU connector C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is ETACS-ECU connector C-311 in good condition? 

    • YES:  Go to Step 13.
    • NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Verify that all the doors can be locked and unlocked normally.
  13. STEP 13. Check the wiring harness between ETACS-ECU connector C-311 (terminals Nos. 6, 9) and rear door lock actuator (RH) connector E-19 (terminals Nos. 6, 4). 
    NOTE: Also check the intermediate connector D-01 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-01 is damaged, repair or replace the damaged component(s) as described. Refer to HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between ETACS-ECU connector C-311 (terminals No. 6, 9) and rear door lock actuator (RH) connector E-19 (terminals No. 6, 4) in good condition? 

    • YES:  Go to Step  18.
    • NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that all the doors can be locked and unlocked normally.
  14. STEP 14. Check rear door lock actuator (LH) connector E-26 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is rear door lock actuator (LH) connector E-26 in good condition? 

    • YES:  Go to Step 15.
    • NO:  Repair or check the connector. Refer to HARNESS CONNECTOR INSPECTION . Verify that all the doors can be locked and unlocked normally.
  15. STEP 15. Check the rear door lock actuator (LH). 

    Remove the rear door lock actuator (LH). The illustration shows when the door lock actuator is viewed from inside the door. Refer to DOOR HANDLE AND LATCH  .

    LEVER POSITION AND BATTERY CONNECTION CHART

    Lever position Battery connection Lever operation
    At the "LOCK" position
    • Connect terminal No. 4 and the negative battery terminal.
    • Connect terminal No. 6 and the positive battery terminal.
    		 The lever moves from the "LOCK" position to the "UNLOCK" position.
    At the "UNLOCK" position
    • Connect terminal No. 6 and the negative battery terminal.
    • Connect terminal No. 4 and the positive battery terminal.
    		 The lever moves from the "UNLOCK" position to the "LOCK" position.
    Fig 4: Rear Door Lock Actuator Lock To Unlock Position (LH)
    G05384061Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the rear door lock actuator (LH) normal? 

    • YES:  Go to Step 16.
    • NO:  Replace the rear door lock actuator (LH). Verify that all the doors can be locked and unlocked normally.
  16. STEP 16. Check ETACS-ECU connector C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is ETACS-ECU connector C-311 in good condition? 

    • YES:  Go to Step 17.
    • NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Verify that all the doors can be locked and unlocked normally.
  17. STEP 17. Check the wiring harness between ETACS-ECU connector C-311 (terminals Nos. 6, 9) and rear door lock actuator (LH) connector E-26 (terminals Nos. 6, 4). 
    NOTE: Also check intermediate connector D-24 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector D-24 is damaged, repair or replace the damaged component(s) as described. Refer to HARNESS CONNECTOR INSPECTION .

    Q: Is the wiring harness between ETACS-ECU connector C-311 (terminals Nos. 6, 9) and rear door lock actuator (LH) connector E-26 (terminals Nos. 6 and 4) in good condition? 

    • YES:  Go to Step 18.
    • NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that all the doors can be locked and unlocked normally.
  18. STEP 18. Retest the system. 

    Check that the central door locking system works normally.

    Q: Is the check result normal? 

    • YES:  No action is necessary and testing is complete.
    • NO:  Replace the ETACS-ECU. Check that the central door locking system normally.
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