What are the reasons why the Alphard door does not close automatically?

[PaisleeRose]

Check the sensor to see if it has received a signal of being pressed, thus activating the anti-pinch function, which prevents the door from closing automatically. It is recommended to remove the interior panel of the door, inspect the sensor wiring, and test whether the sensor resistance is within the standard value. Replace the sensor if necessary. Here is some relevant information about the Alphard: 1. Exterior: The Alphard features an oversized shield-shaped grille with extensive chrome accents that extend into the headlight assembly. The front fascia is more aggressive compared to the previous model, with a more exaggerated front grille that integrates seamlessly with the headlights. The rear design remains largely unchanged, with the tail lights maintaining their upward-slanting design, though the larger chrome trim slightly reduces the area of the tail lights. 2. Interior: The interior of the Alphard has seen minimal changes, with the overall layout remaining largely the same as the previous model. Comfort features continue to be the Alphard's most attractive aspect: the front passenger seats come with heating and ventilation functions, which extend to the rear passengers as well. Additionally, the seats with wide-angle adjustments provide a very comfortable riding environment for middle-row passengers. 3. Powertrain: The Alphard is equipped with either a 2.5L or 3.5L naturally aspirated engine, delivering a maximum power output of 221.0 kW (300 PS) and a maximum torque of 361.0 N·m. It is paired with either an E-CVT continuously variable transmission or an 8-speed automatic transmission.

[SanKaleb]

I remember encountering an issue with the automatic door not working when driving an Alphard. This is commonly caused by insufficient battery power—the electric door system relies on stable electricity, and as the car ages, battery degradation can lead to malfunctions. Dirty sensors may also misjudge obstacles—dust or rain blocking the infrared probe can make it think something is blocking the way. Additionally, the key fob button might malfunction or the system functions could be accidentally locked. Once, my door suddenly wouldn’t close, and it turned out the sensors needed cleaning along the sliding track before returning to normal. I recommend regularly checking the battery status and keeping the sensors clean to avoid moisture damage during rainy days, preventing minor issues from turning into major repairs—saving both time and money. We get so used to the automatic opening and closing that when it suddenly fails, it’s really inconvenient. But addressing it early usually doesn’t cost much.

[VanBrielle]

I think if the door doesn't operate automatically, the sensor components might be malfunctioning—infrared probes could be misreading or misaligned, affecting judgment; motor wear and overheating might cause insufficient power; control system software failure or aging wiring leading to short circuits. You can first try resetting the system—turn off the vehicle's power and restart it; check the fuse box for any blown fuses; a dead remote control battery might also prevent signal transmission. During routine maintenance, pay more attention to protecting electronic components to avoid accelerated wear in extreme environments. The automatic door system is quite sophisticated, and understanding the basic principles can help you troubleshoot simple issues.

[SanAthena]

From years of auto repair experience, common causes of automatic door failure include: motor gear jamming or lack of lubrication causing loud noise; loose or oxidized wire connections leading to power failure; broken springs or misalignment in the door lock mechanism; rust and blockage in the wiper track. I recommend going directly to a professional shop for diagnosis rather than disassembling it yourself to avoid additional risks. Regular lubrication of key components can extend service life, and spending time on maintenance can save major repair costs. Address issues promptly with safety as the top priority.