2015 Highlander Tail Gate

To solve this issue, it would be good to know how the TG works. My GUESS.
Since one can set the opening height, I would assume there is a motor revolution sensor or timer in the ECU to tell it how far to open it - maybe also to close it.
The glove box switch, then, must cut power to the TG ECU, otherwise it wouldn't reset it.
So, the question is, what sensors does the TG ECU use for this?
Since the motors work, it either those sensors, the connections, or the ECU.
The most likely would be a bad/corroded connector.
Anyone got a schematic showing those sensors, wires and ECU location?

bill.ruggirello said:

To solve this issue, it would be good to know how the TG works. My GUESS.
Since one can set the opening height, I would assume there is a motor revolution sensor or timer in the ECU to tell it how far to open it - maybe also to close it.
The glove box switch, then, must cut power to the TG ECU, otherwise it wouldn't reset it.
So, the question is, what sensors does the TG ECU use for this?
Since the motors work, it either those sensors, the connections, or the ECU.
The most likely would be a bad/corroded connector.
Anyone got a schematic showing those sensors, wires and ECU location?

Click to expand...

I've looked and looked but couldn't find an electrical schematic anywhere. I wanted to look for a sensor that sensed a restriction and stopped the tailgate from functioning. That's what I feel is at the heart of this problem.

If you think it is sensing a restriction and there is none visible, the lifts might be hanging up.
Not sure if they can be serviced, but you might try that. If you can regrease them, it might work.

Bill,
Thanks for the input.
I originally thought about that and oiled the lifts / rams where one slides inside the other, and every other contact / hinge on the tailgate that I could. It seemed to help at first, and I felt smart, like I had discovered fire, but not for long. Then sometimes I would physically assist the rams thinking they needed a little help. This sometimes seemed to help, but I think it was just a coincidence. I've thought about taking them apart, thinking I might find some broken piece inside, obstructing their operation, but that is my last resort. I was hoping to get a more definitive answer before getting that extreme.
I still think it's a malfunctioning sensor somewhere. An electrical schematic.... that's what I need....
Thanks......