Air Bag Sensor Light Code 15., Solved! Options

[rapid36]

Hi i have a 94 celica ST and i have a code 15 coming from the air bag computer. I went here to see how to go about fixing this.
http://bgbonline.celicatech.com/94_6gmanua...nt%20system.pdf

I made it to step 8 where it tells me to measure resistence. it said this "measure resistance between terminals +S and +A (less than one ohm)" Now when i did this i got 2.2 ohms on both front air bag sensors, Then it said to do this "+S and -S (infinite ohms)" I tried measuring it but my volt meter i dont think displays infinite (if someone knows how to measure this then please let me know). And so i skipped that one and then i went on to this one "-S and -A (755-885 ohms)" I got 816 on the driver side air bag sensor and 822 on the passenger side air bag sensor. So Do you think these air bag sensors are bad?? cause it said that it should be less than one ohm and i got 2.2 ohm on the first test. Please share your thoughts.

This post has been edited by rapid36: Jan 17, 2015 - 8:15 PM

[VavAlephVav]

If you are reading a resistance of Infinity most modern meters will read O.L. for Open Load, means basically no connection.
From what I understand the airbag sensors are One-shot mechanisms, so for example, if the car had a minor, low-speed, punch in the nose it may have tripped the sensors and yet not been hard enough to set off the air-bags.
In that case you would need to replace the sensors. Also when trying to read a low resistance like 1 ohm check the range setting of the meter so that it is on it's lowest range and will give you a more accurate reading. like there may be one for 0-5 ohms, and another up to 10k ohms, and another up to 1M ohm. It's different with each meter.

[rapid36]

If you are reading a resistance of Infinity most modern meters will read O.L. for Open Load, means basically no connection.
From what I understand the airbag sensors are One-shot mechanisms, so for example, if the car had a minor, low-speed, punch in the nose it may have tripped the sensors and yet not been hard enough to set off the air-bags.
In that case you would need to replace the sensors. Also when trying to read a low resistance like 1 ohm check the range setting of the meter so that it is on it's lowest range and will give you a more accurate reading. like there may be one for 0-5 ohms, and another up to 10k ohms, and another up to 1M ohm. It's different with each meter.

Thank you those are some helpful tips. i did have the ohms set right. It was set to 200 which was the lowest and was able to read 2.2 ohms which means i should of been able to read 0.9ohms only if the sensor would of provided that (which it didnt). And idk if the car was in a accident the car when i got it had a clean title on it, but the idiot who owned it before just had the fuse pulled out so it wouldnt even come on.

You could just pull the ECU under the center console and not have an issue anymore....just sayin'

LOL!!!! I second that.

I guess it depends, the impact in my Miata would've triggered the airbag had it been installed at the time. After putting everything back to stock there're still no codes, and it gives specific codes through the airbag light unlike Toyota and their vague code through the CEL. They're also fuel pump shutoff switches that work in the same way as the SRS impact sensors, and they'll reset. Wouldn't see why it'd be any different. Being the previous owner was a moron that hacked up the wiring under the dash I'd be willing to bet some of those go to the airbags.

If the sensors were a one time thing you wouldn't be able to get a read on them at all I'd think. Of course with all of the shrapnel spitting Takata airbags I'm not sure if you're really improving the safety or not by making them work again.

Ya i agree he hacked up a lot of stuff but i dont see anything tampered with the yellow conduit. I'll post some pictures.











I'll take some more pictures of the harness at the front air bag sensors but they look the same they look untouched.

This post has been edited by rapid36: Jan 16, 2015 - 12:12 AM