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Home >> Mitsubishi >> 2010 >> Lancer Evolution L4-2.0L Turbo (4B11T/C) >> Repair and Diagnosis >> Body and Frame >> Locks >> Power Locks >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Inspection Procedure 3

Inspection Procedure 3

INSPECTION PROCEDURE 3: Central Door Locking System does not Operate even when Door Lock Switch of Front Power Window Sub Switch Operated (Door Lock Switch of Power Window Main Switch Operate Normally).


Central Door Locking System Power Supply Circuit (Part 1):




Central Door Locking System Power Supply Circuit (Part 2):






CIRCUIT OPERATION
- The ETACS-ECU controls the central door lock system, locking or unlocking all the doors by activating the central door lock relay (built into the ETACS-ECU). The ETACS-ECU uses inputs from the following components:
- Door lock actuator
- Door lock switch, which is incorporated in the power window main switch or power window sub switch

TROUBLESHOOTING HINTS
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
- The front power window sub switch may be defective

DIAGNOSTIC PROCEDURE

STEP 1. Checking central door locking system operation
Check that the central door locking system works normally.

Q: Is the check result normal?

YES: Go to Step 2.

NO: Refer to Inspection procedure 1 "Central door locking system does not work at all". Inspection Procedure 1

STEP 2. Check front power window sub switch connector E-08 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is front power window sub switch connector E-08 in good condition?

YES: Go to Step 3.

NO: Repair or check the connector. Refer to general (electrical), Harness Connector Inspection. Verify that all the doors can be locked and unlocked normally.

STEP 3. Check the front power window sub switch (door lock switch).










Remove the front power window sub switch.

Q: Does the front power window sub switch work normally?

YES: Go to Step 4.

NO: Replace the front power window sub switch. Verify that all the doors can be locked and unlocked normally.

STEP 4. Check the ground circuit to the front power window sub switch. Measure the resistance at front power window sub switch connector E-08.

1. Disconnect front power window sub switch connector E-08 and measure the resistance available at the wiring harness side of the connector.







2. Measure the resistance value between terminal 4 and ground.
- The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES: Go to Step 6.

NO: Go to Step 5.

STEP 5. Check the wiring harness between front power window sub switch connector E-08 (terminal No. 4) and ground.

NOTE: Also check intermediate connector C-116 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-116 is damaged, repair or replace the damaged component(s) as described in general (electrical), Harness Connector Inspection.

Q: Is the wiring harness between front power window sub switch connector E-08 (terminal No. 4) and ground in good condition?

YES: No action is necessary and testing is complete.

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. Check that the sunroof works normally.

STEP 6. Check joint connector (1) connector C-101, joint connector (3) connector C-103 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are joint connector (1) connector C-101, joint connector (3) connector C-103 in good condition?

YES: Go to Step 7.

NO: Repair or replace the damaged component(s). Refer to general (electrical), Harness Connector Inspection. Check that the sunroof works normally.

STEP 7. Check the wiring harness between front power window sub switch connector E-08 (terminals Nos. 2, 3) and joint connector (3) connector C-103 (terminal No. 19), joint connector (1) connector C-101 (terminal No. 3).

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 in general (electrical), Harness Connector Inspection.

Q: Are the wiring harness between front power window sub switch connector E-08 (terminals Nos. 2, 3) and joint connector (3) connector C-103 (terminal No. 19), joint connector (1) connector C-101 (terminal No. 3) in good condition?

YES: Go to Step 8.

NO: The wiring harness may be damaged or the connector may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the central door locking system works normally.

STEP 8. 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 front power window sub switch. Check that the central door locking system normally.
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