Yaris 2012 door lock-unlock problem

[danrachita]

Hi.
I have one Toyota Yaris from 2012 and i have problem with door locks.
Dont work from driver door key and when i press from remote lock nothing happend.
When i press unlock just lights flicker but doors dont unlock.
Please if anyone can help with door lock system diagram for this car or have any sugestion about.
Thank you.
BR.

[1NZYaris1]

1 of your doors or hatch is not closed properly:thumbsup:

[danrachita]

Thanks for answer my friend.
Your answer is very good but unfortunatelly for me this is not the reason of malfunction.
All doors are closed and hatch i cant open anymore.
It is sure some serious problem and i supose only some diagram can help me.
BR.

[CTScott]

There are seven fuses related to the door lock control. I would start with checking the 25A D/L and 25A D/L No. 2 fuses, since the flashing lights indicated that the system is receiving the command to unlock and is trying to do so. Those two fuses actually drive the door lock actuators.

[danrachita]

Thank you Sir for answer.
Can you eplain please where are situated that fuses because i dont found that panel thats why i ask for an manual or diagram?
BR.

[danrachita]

I found where are that fuses but if i remmber i check both of them and are ok.
I will check again but if they are ok what other reason can be?
Thank you.
BR.

[CTScott]

I found where are that fuses but if i remmber i check both of them and are ok.
I will check again but if they are ok what other reason can be?
Thank you.
BR.

It could be something like what Ray (1NZYaris) said above, where the system is in an incorrect state. You could try disconnecting the battery for a couple of minutes to reset the Body ECU, which controls the door lock functions.

[danrachita]

Hi.
I didnt solve yet door lock-unlock problem.
Please if you can explain to me what fuses are responsable for good work of door look system.
And if is posibile to found some diagram to check actuators from doors and hatch.
After measuremnt i found an yelow wire in connector for doors in left side where resistance must be under 1 ohm but is around 8 ohms and i supose comparing with other diagrams this wire is comand driver door actuator and is not looking well.
Thank you.
BR.

[CTScott]

I don't have the service manual for the 2012 European Yaris, but I do have the wiring diagrams.

The fuses used by the door lock system are: 25A D/L, 25A D/L No.2, 15A DOME, 5A ECU-B, 5A ECU-B No.2, 5A ECU-IG No.1, and 5A ACC.

On the drivers door there are two larger wires for the door lock motor - A yellow and a pink wire. The Body ECU switches the polarity on those wires to drive the lock to the locked position (yellow = +12 volts, Pink = Ground) or unlocked position (yellow = Ground, Pink = +12 volts). The Body ECU pulses them for a short time (~0.5 seconds) and then stops the feed to them, so to measure you will have to put one lead of the meter on pink and the other on yellow and then keep switch between locked and unlocked. You should see a brief flash on the meter to +12 volts in one direction and -12 volts in the other direction.

[danrachita]

Thank you Sir for this professional answer.
I will check tomorow all that fuses and if voltage come from ECU and i wil post result.
Thank you.
BR.

[danrachita]

Thank you Sir.
I solve the problem by replacing 25A D/L fuse.
Thank you.
BR.

[hatchbackkid82]

I'm having the same problem as well on 2010 sedan. I've checked all my fuses that are related to the door locks and nothing. They are all fine, I use the keyless entry and it only unlocks the driver's side, the lights still fash when when I lock or unlock it. Any suggestions, I 'm ready to lose my mind over this

[CTScott]

I'm having the same problem as well on 2010 sedan. I've checked all my fuses that are related to the door locks and nothing. They are all fine, I use the keyless entry and it only unlocks the driver's side, the lights still fash when when I lock or unlock it. Any suggestions, I 'm ready to lose my mind over this

Do you have OEM keyless or aftermarket?

[hatchbackkid82]

OEM Keyless

[CTScott]

OEM Keyless

If you press the unlock button twice, do the others then unlock?

[hatchbackkid82]

just the driver's side, the passenger side did unlock sporadically now they just don't work at all

[CTScott]

just the driver's side, the passenger side did unlock sporadically now they just don't work at all

In that case, I would suspect the actual door lock actuator, if it is just the passenger door, and if it is all but the driver's that doesn't work, then I would suspect the relay within the body ECU (non really user replaceable) that drives the other three doors.

[DanMC]

Thank you Sir.
I solve the problem by replacing 25A D/L fuse.
Thank you.
BR.

Salut, ai rezolvat problema cu usiile ?...si noi avem o '12 si daca te pot ajuta cu ceva doar spune !
Dan :headbang:

[hatchbackkid82]

If it helps any, I noticed whenever I hit the unlock button that the dome light doesn't turn on anymore. Thanks CTScott for the help

[CTScott]

If it helps any, I noticed whenever I hit the unlock button that the dome light doesn't turn on anymore. Thanks CTScott for the help

That definitely makes it seem like a body ECU issue. The part number is on a sticker on the back of it. If you stick your phone up behind it you should be able to snap a pic of the label. There are a ridiculous number of different part numbers of them, and from what I have found with a couple I have experimented with, you need the same part number, or the circuitry for driving the proper number of doors, interfacing with the OEM receiver for the keyless entry, etc. will not be present.

[hatchbackkid82]

ECU body issue? So not a fuse? Am I looking at an expensive or PITA fix?

[CTScott]

ECU body issue? So not a fuse? Am I looking at an expensive or PITA fix?

There is just one fuse for driving all of the actuators. Based on what is working I can't see it being a fuse. Used body ECUs can be purchased for under $200. Replacing it is a bit of a hassle, as you really need to remove the dash.

You should make a road trip up here and we can confirm for sure what the problem is.

[hatchbackkid82]

And now the driver's door is not responding. Thats pretty much all the door lock actuators:mad:

[screenprinter]

Sorry this is an old post. Took my 2010 Yaris Sedan in for an oil change and recall. The recall was for the Master Door/Window Switch. After a week or so the door lock stopped opening. Toyota World of Lakewood NJ said that what the technician did couldn't cause that issue. After some investigation. I found that it's all one piece.

I'm going to check the fuses between today and tomorrow. Will rule that out.