What is the reason for the unresponsive rear door window switch on the Bora?
3 Answers
The unresponsive rear door window switch on the Bora is due to a window regulator malfunction. Fault inspection method: Use a specialized diagnostic tool VAS5052A to check. The central electrical control unit stores a fault code: 03020, indicating a local data line circuit electrical fault. Reading the window switch data stream in the central electrical control unit J519 reveals that the open or close operation signal of the window switch cannot be recognized when operating the window switch. Window regulator malfunction solution: First, remove the door panel, then lower the window to the disassembly position (a hole in the bracket plate can be seen), take out the fixed glass rubber grommets, separate them from the lifting bracket, remove the glass bracket, take out the large glass, loosen the screws of the middle glass guide rail, pull the guide rail downward after loosening the screws, and then pull out the small glass.
I last encountered this issue when driving a Bora, the rear door window switch suddenly stopped responding. This is usually caused by several reasons. The most likely is the switch itself is broken, as switches are prone to wear due to frequent use; it could also be a problem with the window motor, which fails to receive commands; or a blown fuse—check the fuse box for the rear door fuse to see if it's burnt out; wiring issues like short circuits or loose connections can also cause it to stop working. I recommend first trying other switches, such as the master control switch on the driver's side, to see if it can control the rear door. If it works, the problem lies with the rear door's independent switch. If not, you may need to check the fuse, located near the driver's footwell or in the engine bay—replacing a new fuse is very cheap. Remember to regularly inspect the wiring to prevent rainwater from seeping in and corroding the connections. If you're doing it yourself, first check if the switch plug is securely connected, but it's best not to force it open to avoid causing more damage. Fix the problem promptly, or it'll be troublesome when you can't open the window on rainy days.
From an electrical circuit perspective, there are many possible reasons why the rear door window switch isn't responding. A common issue is a blown fuse - in the Bora, the fuse box is typically located under the steering wheel or near the engine, and the fuse for the rear door often burns out. Worn internal contacts in the switch button are another frequent problem I've encountered during repairs. The motor inside the door that controls the window mechanism could also be faulty. Short circuits or broken wires, especially in the door hinge area where cables are prone to aging and cracking, may be the culprit. A failed relay could also prevent signal transmission. For DIY troubleshooting: listen for a slight clicking sound when pressing the switch - if heard, it means the switch is sending signals and the problem lies with the motor or wiring; no sound suggests a faulty switch or fuse. For prevention: avoid excessive use of the window regulator, close windows when parked to reduce load, and address minor issues promptly to prevent major failures. Regularly check for motor corrosion from water accumulation inside the door, paying special attention to sealing during rainy seasons.
