Vehicles With Auto Down Mechanism

INSPECTION PROCEDURE 2: Driver's Power Window does not work by means of The Power Window Main Switch. [Vehicles with auto down mechanism]

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

Power Window (Driver's Side) Circuit (Part 1):

Power Window (Driver's Side) Circuit (Part 2):

CIRCUIT OPERATION

The front power window motor (LH) receives a signal ("UP", "DOWN" or "AUTO DOWN") from the front power window main switch and controls the driver's power window.

TECHNICAL DESCRIPTION (COMMENT)

The power window main switch or the front power window motor (LH) may be defective.

TROUBLESHOOTING HINTS

- The power window main switch may be defective
- The front power window motor (LH) may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector

DIAGNOSTIC PROCEDURE

STEP 1. Check the power window main switch.

Check that the passenger's or rear power window works by means of the power window main switch.

Q: Is the check result normal?

YES: Go to Step 2.

NO: Refer to Inspection procedure 1 "Power windows do not work at all".

STEP 2. Check power window main switch connector E-15, front power window motor (LH) connector E-14 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Are power window main switch connector E-15, front power window motor (LH) connector E-14 in good condition?

YES: Go to Step 3.

NO: Repair or replace the damaged component(s). Refer to General (Electrical), Harness Connector Inspection. Verify that the power window works normally.

STEP 3. Check the power window main switch for continuity.

1. Remove the power window main switch. Refer to Door Glass and Regulator.







2. Check continuity when the power window main switch is operated to "UP" or "DOWN" position.







Q: Is the power window main switch normal?

YES: Go to Step 4.

NO: Replace the power window main switch. Verify that the power window works normally.

STEP 4. Check the front power window motor (LH).

1. Remove the front power regulator assembly (LH). Refer to Door Glass and Regulator.







2. Connect a battery to the motor terminal, and check that the motor runs freely.







Q: Is the front power window motor (LH) normal?

YES: Go to Step 5.

NO: Replace the front power assembly (LH). Verify that the power window works normally.

STEP 5. Check the wiring harness between power window main switch connector E-15 (terminals 7 and 9) and front power window motor (LH) connector E-14 (terminals 4 and 1).

Q: Is the wiring harness between power window main switch connector E-15 (terminals 7 and 9) and front power window motor (LH) connector E-14 (terminals 4 and 1) in good condition?

YES: Go to Step 6.

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 power works normally.

STEP 6. Retest the system.

Check that the driver's power window works by means of the power window main switch.

Q: Is the check result normal?

YES: No action is necessary and testing is complete.

NO: Replace the front power window motor (LH). Check that the power works normally.