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Old 09-23-2023, 11:04 AM   #1
euniqe
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Join Date: Oct 2018
Drives: 2012 Toyota 86 GT
Location: Australia
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Car acting like battery disconnected after parking

Hey everyone, I had an extremely odd thing happen to my '12 86 today.



I pulled up into a car park, got out and It wouldn't lock from the key remote. It also wouldn't unlock/flash indicators etc.i just thought the key was dead - but the little red light in it was turning in? So I then tried to the lock switch by the window switches, and it didn't work. So I thought maybe the ignition had to be on for the switch to work, and to my surprise nothing turned on when I turned the key, no dash lights - nothing. But then... All of a sudden everything came back on? Like it was just acting up for some reason?



All the symptoms of a battery terminal being disconnected are present - the radio memory reset for example, and the throttle calibration has been forgotten/needs to relearn again. It also now seems super inconsistent with the throttle - it stalled almost every time returning to idle after releasing the throttle, but would drive 100% normally otherwise. I have disconnected the battery many times and it would never stall itself after the throttle is trying to re-learn, although I admit maybe I didn't give it enough time before I started driving.



I of course checked the battery and nothing seems out of place. The terminals are tight, there are no obvious loose wires anywhere or anything like that. I have no idea what went wrong or where to start looking for issues, anybody hear of anything like this before? How could the electronics like just disconnect and reconnect themselves like that?
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