Inspection Procedure D-3

Power Windows: Only the front door window (LH) does not work normally by operating the power window main switch.

Power Window (Front: LH) Circuit:

CIRCUIT OPERATION
The power regulator window motor (FRONT: 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 power window regulator motor (FRONT: LH) may be defective.

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

DIAGNOSIS

Required Special Tool:
- MB991223: Harness Set
- MB992006: Extra Fine Probe

STEP 1. Check the power window main switch.
Check that all of the front passenger's and rear door power windows can operate by means of the power window main switch.

Q: Is the check result normal?

YES: Go to Step 2.

NO: Refer to Inspection Procedure D-1 "Power windows do not work at all."




STEP 2. Check power window main switch connector E-05 and power window regulator motor (FRONT: LH) connector E-02 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

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

YES: Go to Step 3.

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

STEP 3. Check the power window main switch.




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




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 4.

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




1. Remove the power window regulator motor (FRONT: 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 power window regulator motor (FRONT: LH) normal?

YES: Go to Step 5.

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




STEP 5. Check the wiring harness between power window main switch connector E-05 (terminal 7 and 9) and power window regulator motor (FRONT: LH) connector E-02 (terminal 4 and 1).

Q: Is the wiring harness between power window main switch connector E-05 (terminal 7 and 9) and power window motor (FRONT: LH) connector E-02 (terminal 4 and 1) 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. When the power window main switch is operated, the front power window (LH) should open and close normally.