2. The power windows can be controlled from the central switch panel located in the driver's seat or from individual switches located on each door. Each window lifter is driven by a separate reverse electric motor. The position of the control switch determines the polarity of the current supplied to the electric motor, resulting in the raising or lowering of the window.
3. The power window circuit is protected by a fuse and a circuit breaker. Each electric motor has an integrated circuit breaker, so the failure of one of the window regulators does not lead to the shutdown of the remaining electric motors.
4. The power windows operate only when the ignition switch is in the ON position. In addition, many models have a switch on the driver's control panel that can be used to disable the rear power windows and sometimes the passenger door power window. Please take the following points into account before checking the operation of the power window system
5. During the following procedures, general system malfunctions are identified, therefore, if after the described checks the malfunction remains undetected, take the vehicle to a service station for in-depth diagnostics.
6. If the power windows do not work, first inspect the fuse and circuit breaker.
7. If the rear power windows do not operate or are only operated by the driver's seat switches, ensure that the locking switch completes the circuit in the unlocked position. If the switch does not complete the circuit in the unlocked position, replace it.
8. Inspect the wiring from the switches to the fuse panel. If necessary, replace the wiring.
9. If only one power window cannot be operated from the driver's seat, try operating it using a separate switch located on the corresponding door.
Note: This recommendation does not apply to the driver's door window regulator.
10. If the power window is operated by only one switch but not the other, check the ability of the inactive switch to complete a circuit.
11. If a switch completes a circuit, make sure there is no open or short circuit in the circuit between the switch and the motor.
12. If the power window is not driven by any of the switches, remove the trim panel of the corresponding door (see chapter 11) and check the voltage supply to the switch and motor when the switch is in operating position.
13. If voltage is supplied to the electric motor, disconnect from the window regulator mechanism (see chapter 11) and try to move the glass manually to make sure there is no jamming in the guides. Also make sure that the window lift mechanism is not jammed or damaged. If the mechanism is not damaged and the glass moves freely in the door guides, replace the electric motor. If the glass is stuck in the tracks, or the window lift mechanism is jammed or damaged, lubricate, repair, or replace the mechanical parts.
14. If voltage is not supplied to the motor, inspect the wiring from the switch to the motor. When checking, refer to the appropriate electrical diagrams. If a relay is included in the circuit, make sure it is securely grounded and that voltage is supplied to the relay.
15. Check that the power windows are working to confirm the effectiveness of the repairs.