Quote:
Originally Posted by Johnnie
I live in arizona, my door locks including the rear hatch work fine in the winter but when the hot weather arrives they all stop working you can see the push pull lock on the doors move a little like they are trying but wont lock or unlock, I've been getting by by using them manually but my tailgate lock with the key doesnt work so I'm stuck not being able to lock(or unlock) the tailgate. my runner has 300k so its well worn. debating putting on a lock hasp on tail gate so I can secure it this summer, but I sure would like to figure out the problem,note: this problem has gotten worse over the last several years
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Replacing my door lock actuators with new Toyota actuators fixed my door lock problems in the heat. I planned on replacing just the motor but couldn't get the 2 halves of the actuator apart. I found out later that it has to be cut open & not pried open.
It's probably a coincidence but after replacing all 4 door lock actuators, summer 2019, I haven't experienced any rear hatch lock problems. My initial intent was to also address the rear hatch at the same time but I wasn't able to get confirmation if it operated the same way, regarding the actuator, but so far so good & my rear hatch was definitely problematic before replacing the actuator in all 4 doors.
One thing that I had different from your situation was I could still manually open my rear hatch with the key. It was just the power function that didn't work when exposed to the sun or hot out.