What is the reason for the failure of the Lavida's one-touch window up/down function with the key?
4 Answers
Remote key-controlled window up/down malfunction occurs when the car's body computer loses the data for controlling the windows via the remote key. This function can be restored by performing an initialization and matching procedure using the door window switch and the lock button in combination. The purpose of the one-touch window up/down function: It provides convenience for drivers and passengers, primarily to prevent the driver from being distracted by manually operating the windows, thereby improving safety. Additionally, one-touch windows generally come with an anti-pinch feature to avoid the risk of pinching fingers. Basic principle: Each door is equipped with a reversible DC series-wound motor. By operating a switch, the motor is activated. The motor's rotation is slowed down by a worm gear installed on the main shaft, which then drives a drum and wire system to move the glass up and down in parallel. The upper and lower ends are equipped with stops, and a tension drum and spring maintain the proper tension on the wire to ensure smooth operation. Besides the wire-type window regulator, there is also a lever-operated type.
The malfunctioning one-touch power window is so annoying. I encountered this issue last time when driving a Lavida. Pressing the key fob didn't work, which was really frustrating. After checking, I found the common causes: first, initialization loss where the system forgets the window position, often occurring after battery disconnection or maintenance. Second, the key fob battery might be dead, causing weak signals. Third, the switch button could be stuck or have poor contact. The reset operation is simple: use the driver's door switch, hold the window-up button until the window reaches the top, and keep holding for five seconds. Do the same for the window-down button, holding it for five seconds after the window reaches the bottom. Try replacing the key fob battery. If it still doesn't work, it might be due to a short circuit or control unit failure, requiring a professional inspection at a 4S shop. Don't delay to avoid damaging the motor or causing leaks during rain. Prevention includes avoiding frequent power disconnections and keeping the key fob battery healthy.
I've fixed many minor car issues. For the Lavida's window malfunction, start with simple checks: replace the key fob battery to ensure a strong signal. Perform a reset: hold the window switch until the window reaches its extreme positions, pausing for a few seconds each time to reset the memory. Check fuse F38 in the fuse box to see if it's blown, and replace it with a spare if necessary. If the switch contacts are oxidized, clean them with an alcohol swab. Tighten any loose wiring connections or use a multimeter to check for normal voltage. The motor might also stop due to overload protection; lubricate the window tracks. You can try all these steps at home—if they work, you're good to go. If not, it's likely an issue with the control module or internal wiring. Don't force it and risk damaging the car; take it to a technician for repair.
I've seen this issue with the Lavida quite often. The common cause is an initialization failure that confuses the control module, especially after battery replacement. Weak signal due to depleted key fob battery is the second most frequent issue. Switch wear or contact problems blocking commands is another. Wire breaks or blown fuses are also common occurrences. Try resetting: roll the window all the way up, then hold the button for three seconds without releasing; do the same for lowering. Simple steps often work. If not, check fuses or consult a specialist. Fix minor issues early - delaying may affect window mechanism lifespan.
