Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Window Regulator Motor: Inspection
- INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH FRONT
- Inspect the operation of the power window regulator motor (for driver side door).CAUTION:
- Be sure not to apply battery voltage to terminals 3 (PLS), 4 (LMT) and 5 (E) of the power window regulator motor LH connector, because it might damage the pulse sensor and the limit switch.
- Be sure to reset the power window regulator motor (to the initial setting of the limit switch) when the power window regulator motor LH is installed to the regulator.
- Check that the motor operates smoothly when the battery voltage is applied to each terminal of the connector.
OK
MEASUREMENT SPECIFIED CONDITIONMeasurement Condition Specified Condition Battery positive (+) → Terminal 1 (D)
Battery negative (-) → Terminal 2 (U)Motor gear rotates clockwise Battery positive (+) → Terminal 2 (U)
Battery negative (-) → Terminal 1 (D)Motor gear rotates counterclockwise If the result is not as specified, replace the motor assembly.
- Inspect the operation of the PTC inside the power window regulator motor.CAUTION: Be sure that the power window regulator and door glass are installed to the vehicle before inspection.
- Set an electrical tester DC 400 A probe to the wire harness of terminal 1 (D) or 2 (U).CAUTION: Match the arrow mark of the probe with the current direction.
- Fully close the door glass.
- When approximately 60 seconds have elapsed after the door glass has been fully closed, check the changing time of the current, from 16 to 34 A into 1 A, when the power window regulator master switch is pulled UP further (inspection of current cut-off).
Standard: Approximately 4 to 90 seconds.
- When approximately 60 seconds have elapsed after the inspection of the current cut-off, check that the door glass goes down when the power window regulator master switch is pushed DOWN.
- Set an electrical tester DC 400 A probe to the wire harness of terminal 1 (D) or 2 (U).
- Inspect the operation of the power window regulator motor (for driver side door).
- INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH FRONT
- Inspect the operation of the power window regulator motor (for passenger side door).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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