Wiring for the Pass seat weight sensor?
 

Working on eliminating the weight sensor in the passenger seat since I've gone to a set of racing buckets. I know it's not as simple as a resistor and already have a plan for that.

Does anyone know what the color coding for the 3 wires are?

I've already found that the red wire is +12V but I couldn't find anything on the white or brown wire.

I know nothing about this stuff but I may have an extra pad for testing if needed. I cant get mine working correctly after the install Saturday. Heck I cant even get the light off of my dash after the reset. I was so afraid of this! It is killing my OCD lol

I think wstar was going to send you a pad to test with?

I actually just bought a passenger seat out of a wrecked Z34 for cheap. Showed up yesterday and I've already got the mat removed and de-clothed.

http://i1266.photobucket.com/albums/...5D7BC6DDA2.jpg

Managed to expose the terminals tonight. What a PITA that was as this is not a plastic box the circuit board is housed in but instead a solid block of urethane like material. :mad:

Wow.....look at all the sensor points ( I think ) on that thing. This pad is like the VVEL of weight sensors :mad:

I plugged my pad and seatbelt back in without soldering in the 4.7ohm resistors. I thought doing it that way I would not have to.

I believe the sensor points are just piezoresistive based load cells. Assuming I'm right, making a switchable airbag box (on/off) would simple be a matter of replacing the sensor points with 2 resistors. One set of resistors would be "Off" and the other set would be "On".

The 4.7 ohm resistors have to be used to simulate the airbag itself. Without it the system knows the airbag is missing and as a result generates a error.

Y'all may be able to get some info (or at least good hints) from the FSM.

That's where I found that the red wire is +12VDC but it makes no mention of the other 2 wires. :shakes head: I really wish they would just have a full wiring schematic for the entire car.

Does this help at all?

http://i.imgur.com/egNw90r.png
The fact that one of them says "Communication" might mean that it is using some kind of serial or CAN interface.

I soldered the resisitors on and tried to reset my airbag light but im having no luck in doing so. I tried the method given on here several times and still nothing... Any other way in making the stupid flashing dash light go off?

Check the wiring diagrams above the pages where the pinouts were found. And there should be a description of how the system works near the top of the section. I'm kinda busy right now or I'd find the pages for you. If you can't find what you need, I'll search the FSM later.

If there is any kind of electronics near the connector on the sensor, it probably uses CAN or other serial communications.

It looks like the pad is just a bunch of momentary contact "bubble" switches. I'm guessing that there is some electronics near the connector that counts the number of switches made and tells the module (BCM?) that controls the air bag system.
Edit: If I'm right about that, a simulator box would need the electronics. You should be able to fake the bubble switches near the electronics so the box wouldn't have to have a sensor pad crammed in there. OK. Now I really have to go.

Good luck searching

That's something I mentioned before, one wire is doing some communicating back and forth..... I tried measuring resistance but that's not it.
I think the best way to do it is to just go ahead and set all weight sensors to on so the air bag is always on...
Does anyone know or have access to consult to see if this can be turned on or off all the time?

I would rather just have it on all the time as well.

:excited: to see this thread. This exact situation was driving me insane last season, I gave up and just let the damn light blink. Hopefully someone can get to the bottom of this, I ALSO would just like all the airbags to be on all the time.

I believe they make a module an aftermaket module for toyota etc, this might be something to look at as well... see how it works..

It's extremely annoying. My resistors were done properly so it's not that. I tried the reset procedure 10+ times and still NOTHING. All I wanted was nice bucket seats!!!!:ugh2: