Inspection Procedure 2

INSPECTION PROCEDURE A-2: Central Door Locking System does not Operate even when Door Lock Switch of Power Window Main Switch Operated (Door Lock Switch of Front Power Window Sub Switch Operates Normally).

CAUTION:
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.


















CIRCUIT OPERATION

- The ETACS-ECU controls the central door locking system, locking or unlocking all doors by activating the central door lock relay (built into the ETACS-ECU). The ETACS-ECU uses inputs from the following components:
- Door lock actuators

- Door lock switch, which is incorporated in the power window main switch or front 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 power window main switch may be defective

DIAGNOSTIC PROCEDURE

STEP 1. Checking central door unlocking 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 A-1 "Central door locking system does not work at all Inspection Procedure 1."
STEP 2. Check power window main switch connector E-19 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is power window main switch connector E-19 in good condition?

YES Go to Step 3.
NO Repair or check the connector. Harness Connector Inspection.
Verify that all the doors can be locked and unlocked normally.
STEP 3. Check the power window main switch (door lock switch).





Remove the power window main switch. Refer to Service and Repair.





Q. Does the power window main switch work normally?

YES Go to Step 4.

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

STEP 4. Check the wiring harness between power window main switch connector E-19 (terminal No. 10) and ground.

- Check the ground line for open circuit.

NOTE:
Also check intermediate connector C-126 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-126 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection.

Q. Is the wiring harness between power window main switch connector E-19 (terminal No.
10) and ground in good condition?

YES Go to Step 5.
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.
STEP 5. Check ETACS-ECU connector C-301, C-315 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Are ETACS-ECU connector C-301, C-315 in good condition?

YES Go to Step 6.
NO Repair or replace the damaged component(s). Harness Connector Inspection. Check that the sunroof works normally.
STEP 6. Check the wiring harness between power window main switch connector E-19 (terminal No. 13) and ETACS-ECU connector C-315 (terminal No. 15), between power window main switch connector E-19 (terminal No. 14) and ETACS-ECU connector C-301 (terminal No. 2).

- Check the power supply line for open.

NOTE:
Also check intermediate connector C-127 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-127 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.

Q. Are the wiring harness between power window main switch connector E-19 (terminal No.
13) and ETACS-ECU connector C-315 (terminal No. 15), between power window main switch connector E-19 (terminal No. 14) and ETACS-ECU connector C-301 (terminal No. 2) in good condition?

YES Go to Step 7.
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 7. 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 power window main switch. Check that the central door locking system normally.