Did you check the wiring harness entering the hatch from the roof. That flexure point is an isue on MANY vehicles. My BMW wiring failed there
So, what do I do.First off,Thanks for letting me join! I've been reading all the threads on here and I haven't found quite what I'm looking for. Here's my dilemma on my 2015 MKC with powerliftgate: Power liftgate started acting crazy, sometimes it worked electrically, sometimes it didn't. Still worked manually. One day I passed by the rear and noticed the sound of the rear latch cycling. After a weekend of no use, found dead battery. Charged battery and two days later dead again. Took rear liftgate apart to investigate, found lock cycling. Used amprobe on battery and determined that with car off and PLGM ( I believe is the correct term Power Liftgate Module) plugged in, 5A draining from battery. Door actuator quits working from all switches, electrically, altogether. Only way to open rear gate is to manually stick hand in door and push lever on actuator. Unplugged the module and it went to 0A. Ordered a new module and while waiting, pulled latch mechanism apart and checked all of the switches in it. everything looked OK. Got new module in and installed. Power liftgate still doesn't work. Ordered a new liftgate motor, waited 2 months since they were on back order, installed it and still nothing. All fuses OK. Used Forscan Lite with ELM327 Module and found an error that said the computer had lost communications with the PLGM. Cleared the code and retested and the code never came back. Still doesn't work. Car is out of warranty and dealership too far away. I'm praying someone here can help me. Thanks
Update: I got FORSCAN 2.4.3 installed but when I go to Config and Programming, I don't see the RGTM listed a module! (perhaps the problem, bad module?). Though when I do a scan on the MS-CAN it comes up...@Mkcliftgate4life and @lenko, thanks for reviving this thread. I have been searching/following trying to troubleshoot my '15 MKC Liftgate. My deal is the lock keep cycling (un-cinching?), not actually unlocking or opening, just the pre-unlock sound, happen after locking, with tail gate open, while driving, constant. With a stronger battery, and daily driving, it was annoying, but livable. The battery started showing its age and now we have gotten stuck with dead battery a few times in the last month. Today I installed the new battery and pulled fuse f8, thinking I would get the car reliable/drivable and then start working the modules/wiring. Also note that after I pulled the F8 FUSE and put it back as part of troubleshooting, I have NO liftgate action at all; FOB, Cockpit &, tailgate buttons and kick no worky. Got my FORSCAN out and looked for DTC and found nothing. Seeing Lenko response about new 2.4 FORSCAN that allows module programming, I think I will see what I can do to try to re-flash that Module. For some reason it show the model/part for the RGTM, but no strategy? If you guys want to work together on any troubleshooting, happy to put our heads together. Going to go learn 2.4.x now....
Is the Click the headlight relay "clicking". Since my Liftgate is not working at all, I noticed the head & tail light blink when the liftgate button is tried, I hear the headlight relay click when I do. If that is your case, perhaps you have a bad button that keeps trying to open the liftgate?Hello. I hope somone will see this. Someone that maybe came up with a solution. The same problem as everyone above. The "dun-dun-dun" sound of the lift gate cycling was driving me nuts. Over the Christmas long weekend the constant cycling finally ran my already bad cell battery dead and because I didn't have the key in the key fob when I purchased this a few months ago I had to call a tow service to break into my car. Changed the battery. The dun-dun-dun is still there so I found the f8 fuse the shuts off the liftgate completely and it stopped the motor from cycling. It also stopped the liftgate from working. That fuse panel fyi is in the back. So to replace the fuse I'll have to crawl from the back seat to put it back in.
Here's the interesting thing. Though the motor is not coming on doing the dun-dun-dun sound every 5-10 seconds. Now there is a click click sound soundsike a relay trying to activate the motor every 5 to 10 seconds. So where ever that signal is coming from is the issue. But I have NO IDEA where that signal so coming from.
My next feat will be to remove the panel on the loft gate and find the source to the click click and see where it leads. I need my liftgate. As anyone would. So I have to find the solution to this. And what is causing that relay to activate over and over again 24/7. In the car, not in the car, doesn't matter. The dun-dun-dun is now replaced with click - click - click.
If anyone has figured this out please let me know. I would sure appreciate it! Thank you.
I had a similar problem where the rear hatch was opening randomly and this only applies to vehicles with a push button start-- Update the RFA(Remote Function Actuator) module by reprogramming. After I updated the module the concern was repaired. Hope this helps!Is the Click the headlight relay "clicking". Since my Liftgate is not working at all, I noticed the head & tail light blink when the liftgate button is tried, I hear the headlight relay click when I do. If that is your case, perhaps you have a bad button that keeps trying to open the liftgate?
I had a similar problem where the rear hatch was opening randomly and this only applies to vehicles with a push button start-- Update the RFA(Remote Function Actuator) module by reprogramming. After I updated the module the concern was repaired. Hope this helps!