2022/GCC Spec Airbag Coding Tests

[Kennith82]

I swapped out my drivers seat for an aftermarket Bride seat, with Bride MO rails.

While with the drivers seat harness (the one that is connected to the car) initially unplugged, I received the airbag and driver restraint error (as expected).

However, I plugged in the seatbelt receptacle into the seat harness (again, the one that is connected to the car), as well as a 3.3 ohm 1W resistor, and after clearing the DTCs, my airbag light was cleared, and the driver restraint error no longer came up.

Moreover, according to the diagnostic tool, no DTCs came up. No coding has been done to the car to clear any sort or error.

While on Razorlab's helpful thread on coding, it seems like even if the receptacle is plugged in, and a resistor is used, the seat positioning error/harness errors will still occur. Therefore perhaps differences in car spec/trim may be the reason certain people have had issues coding in seats.

The seats in my car are/were the red OEM leather powered seats.

So my question is, did Toyota do something different in the model year, or possibly the region/spec?

Here is a video of the phenomenon. I will embed another video later showing that leaving the receptacle and resistor will trigger the airbag/harness lights and error, and that putting them in, as well as clearing DTCs

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[Kennith82]

Video of the setup. Unsure if it'll work for anyone else. as mentioned, I'll try to make another video later showing that leaving the receptacle and resistor will trigger the airbag/harness lights and error, and that putting them in, as well as clearing DTCs.

 

[STi_to_GRzupra]

Do you have a photo where you pinned the 3.3 ohm 1W resistor?

 

[daddydex]

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[Kennith82]

I’ll try to get a proper write up soon. I figured out how to code out the knee airbag and steering wheel.

I want to make a complete guide on replacing the steering wheel with an aftermarket one. Which includes either coding out the airbag, or replacing them with resistors.

The US spec airbag has a 3 stage airbag with 2 pyrotechnics, meanwhile the GCC spec has 1 pyro (I’m assuming less regulations). And Japan has 1 stage with a fuse. I don’t feel confident in posting a guide until I get a hold of how other cars are coded.

If anyones looking to code out the drivers steering airbag on a left hand drive car, set ZUENDKREIS_15 to disabled (nicht_aktiv), keep in mind you need to remove the drivers airbag first before coding.

I mentioned this on the other thread, but for some reason the GCC cars use some other method for seat positioning for comfort entry (could it be safety related?)

I didn’t see it as an option to disable within protool, so I am assuming that’s why no coding was needed.

If anyone has their ACSM NCD (and maybe BDC?) coding, it might be helpful. Sorry for all of the yapping, I kind of ramble a lot.

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