Inspection Procedure D-3

Power Window: Only Front Door Window (LH) does not Work by Operating Power Window Main Switch

Power Window (Front: LH) Circuit:

CIRCUIT OPERATION
The front power window motor (LH) opens or closes the door window (LH) when the power window main switch is moved to "UP" or "DOWN" position.

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

TROUBLESHOOTING HINTS
- Malfunction of power window main switch
- Malfunction of the power window motor (front: LH)
- Damaged harness wires or connectors

DIAGNOSIS

Required Special Tool:
- MB991223: Harness Set







STEP 1. Check the power window main switch.
1. Remove the power window main switch. Refer to Door-Door Trim and Waterproof Film.
2. Check continuity while power window main switch is moved to "UP" and "DOWN" position.

Q: Is the power window main switch normal?

YES: Go to Step 2.

NO: Replace the power window main switch. When the power window main switch is operated, the front power window (LH) should open and close normally.







STEP 2. Check the front power window motor (LH).
1. Remove the front power window motor (LH). Refer to Door-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 3.

NO: Replace the front power window motor (LH). When the power window main switch is operated, the front power window (LH) should open and close normally.




STEP 3. Check power window main switch connector E-05 and front power window motor (LH) connector E-02 for damage.

Q: Are power window main switch connector E-05 and front power window motor (LH) connector E-02 in good condition?

YES: Go to Step 4.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. When the power window main switch is operated, the front power window (LH) should open and close normally.




STEP 4. Check the wiring harness between power window main switch connector E-05 and front power window motor (LH) connector E-02.

Q: Is the wiring harness between power window main switch connector E-05 and front power window motor (LH) connector E-02 in good condition?

YES: No action to be taken.

NO: Repair the wiring harness. When the power window main switch is operated, the front power window (LH) should open and close normally.