Door lock keeps locking.

[ElectroBoy]

Maybe one of those GPS trackers. Seems odd that it would backfeed though. Only way to tell would be to check the voltage of the battery leads when disconnected

Yeah, it’s a strange one.
It would be a good data point to read the voltage of the battery cable leads when they are disconnected. That is, the voltage between the two leads.
Before you do the shorting and lights-on step to drain off all the charge as [MENTION=83083]rigtec[/MENTION] described.

Just thinking if there’s a good capacity battery somewhere holding up the +12 v you might get a spark when connecting the battery cables.

 

[hawthornearms]

I had a similar problem, residual voltage, on a 2011 Ram 1500. Turned out my Type-C CLA when plugged into my power brick for my phone was feeding enough voltage back into my vehicle to keep the computer from powering off.

Most bizarre thing ever!

 

[rigtec]

"...Before you do the shorting and lights-on step to drain off all the charge as [MENTION=83083]rigtec[/MENTION] described..."

Hi [MENTION=200736]ElectroBoy[/MENTION]

I've Never suggested that he short the POS and NEG cables together. My statement was:

I would (under any other circumstance) tell you to pull the HOT and GND cables off of the battery and join them together (to discharge the power), but I can't because I don't know if the power source is large enough to do any electrical damage!

And YES, I do wanna drain any residual static charge from the circuit e.g., capacitors, so I suggested leaving the lights, or blower on for that purpose; they can be turned off before reconnecting! "Just to be clear"!

rig, Cheers!

 

[ElectroBoy]

Hi [MENTION=200736]ElectroBoy[/MENTION]

I've Never suggested that he short the POS and NEG cables together. My statement was:



And YES, I do wanna drain any residual static charge from the circuit e.g., capacitors, so I suggested leaving the lights, or blower on for that purpose; they can be turned off before reconnecting! "Just to be clear"!

rig, Cheers!

Yep, you are correct, rig. I had a brain fart, made a mistake and read your post wrong. In too much of a hurry. Sorry about that. :whipping2
I owe you a beer. :cheers:

 

[Cndnmax]

[MENTION=200736]ElectroBoy[/MENTION] I will disconnect switch pro as well. I used a voltmeter to check, 12.9V while engine is shut, so I guess battery is good.

[MENTION=83083]rigtec[/MENTION] I will definitely try it and report back, thanks for all the help provided.

That doesn’t really tell you if the battery is good. You have to also check the voltage when under load (key on, headlights on, radio on, etc). Also check the voltage wth the engine running.

 

[rigtec]

Yep, you are correct, rig. I had a brain fart, made a mistake and read your post wrong. In too much of a hurry. Sorry about that. :whipping2
I owe you a beer. :cheers:

Lol! No big thing bro, no love lost here!, 'Best to you',

rig!

 

[370HSSSV]

hey [MENTION=83083]rigtec[/MENTION]
I did the reset again, everything reset, it stalled. And I have been driving for couple hours over the weekend, door lock didn't acted weird at all! Thanks for all the help you provided, I really appreciated it!

 

[CavPro]

Good job to all, I'm sure someone else down the road will find this very useful.
< liked >

 

[rigtec]

hey [MENTION=83083]rigtec[/MENTION]
I did the reset again, everything reset, it stalled. And I have been driving for couple hours over the weekend, door lock didn't acted weird at all! Thanks for all the help you provided, I really appreciated it!

Well 370HSSSV...

I really appreciate you allowing me the opportunity to try and help! And I am 'More than pleased' by the results. See, you stuck with it and look what happened! We can all learn from this experience... when these quirky type troubles start to crop-up on our 'Prized 4Runners', don't worry about it.

Stick with the basics; not the gravitational pull of the sun on Pluto and Jupiter combined lol! First consider what the vehicle is doing; does it make any sense? Have you seen this happen before? How old is the truck...etc! I've seen these quirky issues happen a thousand times, starting with my own, and 'NO ONE' could point me in the right direction; not even the dealership where I bought it!

They said it was because I installed a set of PIAA Fog-lights on the truck, so I knew that they were full of shipp! And the local (non-dealership) shops didn't yet have the software for this new Toyota (back in 2012). MY symptoms were: 'every warning icon on the instrument cluster was lit up' ALL of them! The Tach-o-meter and the Speed-o-meter were dropping out; as well as the cluster's back lighting, so I couldn't see the non working speed-o-meter at night!

So I was on my own. That's when I started to learn about the function of the 'Main body ECU Compu Network'! It's driven by software, just like my lousy laptop; which is ALWAYS acting weird; especially right after a Windows Update; which I no longer allow it to do, automatically! The problem: The 'Short-pin' had become a little loose, causing the MB-ECU to lose power! Anyway, thanks for the (fantastic) heads-up [MENTION=127951]370HSSSV[/MENTION] 'Best to you', and ALL the others here who have been so supportive and technically thoughtful!

rig, cheers!

 

[rigtec]

Good job to all, I'm sure someone else down the road will find this very useful.
< liked >

rigtec Liked [MENTION=266676]CavPro[/MENTION] post!

 

[azsd4runner]

I just wanted to thank you guys for this sequence. I gave a friend's 2014 Lexus GS350 a jump start and upon returning home my doors kept locking themselves. I followed the advice on this thread and it worked perfectly to fix the problem. Thanks so much guys.

 

[missionman]

I used the search function, but nothing for 5th gen, and not a clear answer yet.

2015 4Runner
So today, my door lock keeps acting up, when I pressed unlock button either on key fob or the button on driver side door, the door will just lock itself up right after I press unlock.
And there is also a period of time, both engine and key are off, the door lock is just repeatedly doing lock/unlock process non stop...
It only happens when the car is parked so far.
And all the door locks while I turn the key from ON to Start, it supposed to be while I shift out of Park right?
I checked the fuse box, it's completely dry (because it's raining hard last couple days here)
The only after market I have that are electrical related is a switch pro 8100 and a BD light bar, I had them on for more than a year already.

I read previously it could be the battery in the car is old about to go, is that why?
Any idea on what and where to check and what's going on?
Thanks for your time, I really appreciate your responses. Trying to catch the moment between unlock/lock to open the door was not fun...

Don't know if this helps, but my 4th Gen 2003 4runner SR5 locks itself every time within like 1 minute or so ONLY when battery is really low. Happens every time I park and work on my car for long periods of time. In fact my battery somewhat ran low today and wouldn't crank over my motor. Every time I would unlock it and not open the door right away it'll lock itself.
I think this is more of a safety feature because it seems to work in a certain sequence. Like if I unlock it and open the door right away it wont lock itself even after i close the door. Only locks automatically if i press unlock on my fob and wait a minute without opening the door.