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Disable Seat Belt Alarm 2013 - Factory method DIY

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Old 01-04-2013, 04:50 AM   #1
poppeye [OP] poppeye is offline
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Disable Seat Belt Alarm 2013 - Factory method DIY

I know there have been many posts on this topic. But i believe this to be worthy of its own thread as this is the legit 'factory' way of doing this without any wiring changes. This may work on other year models, but has only been confirmed on my 2013 TRD off road Taco.

First of all, the owners manual lists the seat belt alarm warning as 'customizable' indicating its possible to be normally turned off. it gives no instruction on how to do so, and presumably the dealer can do it for you. methods from earlier model years don't work.

i did not discover this solution, someone from a scion board posted these instructions which were originally from a prius. but they are confirmed working on the 2013 taco.

********
Step one is buy a elm327 obd reader. mine was about 20 bucks, they are all over amazon. you can also use this in the future with your smartphone if you buy a bluetooth model to do all kinds of cool things.

2nd, plug it in, power up and get a bluetooth laptop/computer something to talk to it. do a normal bluetooth connect, password is 1234. open up hyperterminal, or putty or any basic terminal program. change the com port to your bluetooth serial (mine was com40 as it told me when my bluetooth connected). Connection set to 9600/N/8/1.

Then basically just plug in the commands below, and your seatbelt alarm will be permanently off. This is basically what the dealer will do if you bring it in, although they may have some fancy tool to do it from toyota.

Direct Connect CDT
>LM327 v1.5
?

>ath1
OK
* Turn on all headers so I can see it

>atl1
OK
* Turn on linefeed so I can read it

>at sp 6
OK
* Set the protocol to ISO 15765-4 CAN 11/500

>at dp
ISO 15765-4 (CAN 11/500)
* Display the protocol (make sure it took it)

>at caf1
OK
* Set auto formatting on so I can read it

>at sh 7c0
OK
* Set header to 7c0, that's where I'm going to send the command to

>21a7
7C8 03 61 A7 C0
* me - What's your seat belt setting?
* Taco - My seat belt setting is set to annoy you, C0.

>3ba700
7C8 03 7F 3B 78
7C8 02 7B A7
* me - don't annoy me anymore
* Taco - processing

>21a7
7C8 03 61 A7 00
* me - did you get that?
* Taco - yeah I turned it off, don't you see the 00?

Enjoy, please post and let others know if this works on other years. This is likely to work on any recent toyota or Scion vehicle, but no guarantees.
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Old 01-04-2013, 06:54 AM   #2
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Can you share the original link where you found the info?
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Old 01-04-2013, 08:16 AM   #3
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I was able to get the dealer to turn the chime off on my 2012 for free, but someone mentioned that any time the battery's disconnected it will reset to default. So it'd be nice to be able to do this on my own if I want to do any electrical mods. Thanks for the info.
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Old 01-04-2013, 12:12 PM   #4
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poppeye pops in with a nuclear bomb of a post


you, sir, win +1 internet
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Old 01-04-2013, 12:49 PM   #5
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I wouldn't go entering commands to unknown address' in the control module via a terminal. Really Bad things can happen if you mistype an address or command.

No disrespect intended.
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Old 01-04-2013, 01:11 PM   #6
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so who's gonna try it first?
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Old 01-04-2013, 01:54 PM   #7
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I am not yet a taco owner but will be soon, this will be my first tweak

I checked this against what I know about toyota canbus (I have a 2010 yaris and
have already hacked the bejeezus out of it's electronics using a borrowed Techstream) and this info poppeye posted is solid


yes you could enable or disable something like VSC by accident doing this, but the header listed above
07c0, is nowhere near those groups


I have access to a Techstream yes but reverse engineering it's commands and translating to OBDII is
still a lot of experimenting, and some stuff is only accessible by a Techstream....but the Prius forums
already did the hard work in this case

from scion forums
http://www.scionlife.com/forums/arch.../t-213304.html
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Old 01-05-2013, 05:45 AM   #9
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Just a bit of additional information for those squeamish about this technique.

>ath1
OK
* Turn on all headers so I can see it
-- This command is to the ELM327 chip directly, it gives instructions on how to format the serial terminal, not to your vehicle

>atl1
OK
* Turn on linefeed so I can read it
-- This command is to the ELM327 chip directly, it gives instructions on how to format the serial terminal, not to your vehicle

>at sp 6
OK
* Set the protocol to ISO 15765-4 CAN 11/500
-- This command is to the ELM327 chip directly, it gives instruction to the chip on 'what language' to use when speaking to your vehicle. but still to this point, no commands have been sent to your vehicle.

>at dp
ISO 15765-4 (CAN 11/500)
* Display the protocol (make sure it took it)
--this is talking to the ELM327 chip again, just making sure it took the last command.

>at caf1
OK
* Set auto formatting on so I can read it
again, formatting to the ELM327 chip

>at sh 7c0
OK
* Set header to 7c0, that's where I'm going to send the command to
this instruction is setting up communication to your vehicle, but not actually sending anything to it. its telling the elm327 what part of the controller you are about to talk to.

>21a7
7C8 03 61 A7 C0
* me - What's your seat belt setting?
* Taco - My seat belt setting is set to annoy you, C0.
This is your first command that actually goes to the vehicle, and its a request for information.

>3ba700
7C8 03 7F 3B 78
7C8 02 7B A7
* me - don't annoy me anymore
* Taco - processing
this is the only command being sent that changes anything. care should be taken when keying this in, but in most cases you can simply revert anything you do. I believe the command 3ba7c0 will revert your seat belt to being on again (for example).

And to be clear, i did do this on my vehicle already
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Old 01-05-2013, 11:08 AM   #10
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Quote:
Originally Posted by Tactical Tacoma View Post
Yeah this sounds simple and safe,....

I think it would be easier to use TechStream
This + a lot safer + you can get the setup for Techstream and the adapter for about 35$.
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Old 01-25-2013, 05:55 PM   #11
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Quote:
Originally Posted by poppeye View Post
>3ba700
7C8 03 7F 3B 78
7C8 02 7B A7
* me - don't annoy me anymore
* Taco - processing
I also did this and it worked perfectly - Thanks.
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Old 01-25-2013, 06:28 PM   #12
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Quote:
Originally Posted by Jimmyh View Post
This + a lot safer + you can get the setup for Techstream and the adapter for about 35$.
If you order on eBay from china and wait a week or two you can get for around $25. I just got mine just don't have a PC to use yet(have Mac).
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Old 02-02-2013, 07:51 PM   #13
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I bought the Bluetooth ELM327 off of Amazon and just did this on my 2013 Taco - successful! thanks
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Old 02-24-2013, 04:00 PM   #15
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^^ that had to hurt like hell
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Old 02-24-2013, 07:15 PM   #16
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Quote:
Originally Posted by Flynn Diesel View Post
holy shit. It's like his facial expression from the moment of the crash was saved in face oil on the back of a headrest. Crazy
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Old 02-24-2013, 09:41 PM   #17
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I bought this unit a couple weeks ago. I'll learn how it works when I get it, but I wonder if I can provide the same instructions to this unit, even though it isnt BT. I'd imagine so, right?

VCI v7.31.003 Toyota Lexus TIS TechStream OBD2 Diagnostic Interface Scanner
http://www.ebay.com/itm/261159388342...S:3160&vxp=mtr

:::::::::EDIT:::::::: Weeks later.
I got it working
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Old 04-05-2013, 04:48 AM   #18
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Quote:
Originally Posted by Agro View Post
I bought this unit a couple weeks ago. I'll learn how it works when I get it, but I wonder if I can provide the same instructions to this unit, even though it isnt BT. I'd imagine so, right?
The fact my tool was bluetooth is almost irrelevant. bluetooth is a serial connection just like USB, and the software interaction with it through the terminal is identical.
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Old 11-10-2013, 05:37 AM   #19
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Quote:
Originally Posted by Exxon View Post
I bought the Bluetooth ELM327 off of Amazon and just did this on my 2013 Taco - successful! thanks
http://www.amazon.com/ELM327-Bluetoo.../dp/B0051CAE1C


I am looking to turn off the seatbelt chime, on a new 2014 Sequoia (on construction sites and in and out of truck).

Will this work with the sequoia and does it come with the techstream software?

Or will this one work? It says it comes with the latest techstream.

http://www.eobd2.net/wholesale/mini-...gle-cable.html

thanks.
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Old 11-10-2013, 01:29 PM   #20
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Interested to hear the answer to rinconmike's question. I need to turn that damn chime off.

Bob
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