Hello everyone,
I own 2016 Skoda Octavia 5E and I began to have a tailgate opening issues in November 2024.
What was it like?
Firstly my boot went up only a half way, then beeped and stopped. I could either open/close by hand, or pressed button again and then it closed automatically. After this it worked for a while normally. Then it could not open up automatically, but could close automatically with a press of any button once manually opened. Then it worked like that for about a month until it didn't work at all. Now if I press any button to open the boot (interior, key fob, trunk buttons) I can only hear one beep and that's it. I read errors with VCDS diagnostics and there was only "Electrical error Motor 2". I could read all the values from the control unit (CU) like motors' position or voltage.
I decided to buy new motors from ebay. Replaced them and it didn't work either. I read the CU again, no errors since the last time because I deleted them when I had old motors installed. I could again read all the values, however I noticed that voltage on motors was 1.85 V all the time, if I opened/closed the boot, I could see that CU is trying to work, but nothing happened and voltage dropped to 0 V, then came back to 1.85 V if the CU stopped trying to open it.
So what's next?
I decided to check the CU itself. I looked for some corrosion or burnt components on PCB but there was no obvious damage, when I connected the CU back I could even hear relays being turned on or off. Even though CU seems fine, and I can read it with diagnostics, it doesn't mean it's actually 100% working. I was checking the voltage only with VCDS, didn't measure it with a multimeter yet. I checked the wires too, no damage was seen. So after all of this I think that the CU may be faulty or burnt fuse? (If fuse was dead I guess more features would stop working). Or maybe locking mechanism is misbehaving and causing issues in control logic? I have read that even locking mechanism can cause this like in these videos:
Do you have any tips what could be wrong or worth checking?