Airbag question

Anonymous · May 15, 2006, 17:18

m3r3 is just another way of stating the value of resistor, ie 3.3 ohm but hopefully the dudes in maplin should be able to find the correct one. s:roll: :roll: s:roll:

Anonymous · November 9, 2011, 15:18

I know its 5years old, but have the same problem. I have to NCT (MOT) my car and airbag light is on. I can not only cover it, as they check for test light come on when ignition turned on. Will the light come on for a few sec on startup with the resistor fitted?

markiii · November 9, 2011, 15:52

in my experience yes it will probably

Steve Green · November 9, 2011, 16:46

The ECU sends a small current through the airbag, not enough to fire it, but enough to test the complete circuit.
So with a resistor fitted the ECU will think the circuit is OK if it sees a 3.3 Ohm resistor.

Disabling or failing to repair a faulty Airbag could invalidate your insurance.

markiii · November 9, 2011, 18:40

Quote from: "Steve Green"The ECU sends a small current through the airbag, not enough to fire it, but enough to test the complete circuit.
So with a resistor fitted the ECU will think the circuit is OK if it sees a 3.3 Ohm resistor.

Disabling or failing to repair a faulty Airbag could invalidate your insurance.

i agree its the theory

in practice I've seen a couple that the reisstor wouldn't fix

Anonymous · November 9, 2011, 18:51

Yep, thats why i am asking. i try to figure it out whats the problem in my case. I have my airbag in the wheel, but light is on. I try to find out whats the problem. so i will test with the resistor, to see if something wrong in my airbag, or i have to look somewhere else

Anonymous · November 10, 2011, 14:51

I checked my airbag in the steering wheel. Looks ok, with all connected. What else can cause the Airbag light to stay on?

iPap · November 10, 2011, 15:14

Check the wires under the seat to the seatbelts are connected!

Anonymous · November 10, 2011, 15:59

i checked, and they are all connected. Is it possible of a faulty sensor? As the side of my car was damaged, and fixed by prev owner

aaronjb · November 10, 2011, 16:35

Is it possible the airbag deployed, if you say the car had a bit of a prang? If so then you (probably) need a new airbag ECU and/or the ECU resetting (some will, some won't) as the fault will stay on. Actually on the VX even a sensor fault will cause the light to stay lit after resolution, you need a tester to reset it.

Not sure if a dealer can interrogate the airbag ECU on the Toyota, certainly can on my Vauxhall, which will tell you what the cause of the light is (e.g. deployment, sensor, etc)

Steve Green · November 10, 2011, 16:42

That's perhaps a clue. there are two sensors mounted on the chassis rails on either side under the frunk. I understand that these cannot be reset one triggered by an impact.
The only other connection, apart from the airbags are to the seatbelt pretensioners on the reels. If these have been triggered they will lock the seatbelts.
It sounds as if you need to check the components, their fitting and electrical connections.

I would expect though that if there was a fault in the circuit that you would have a DTC fault code.

Anonymous · November 10, 2011, 17:28

The seat belts looks ok. i have only an obdii reader, and Toyota herein Ireland are not too helpful.... The whole car was messed with, and i only discovered that airbag light, and brake fault light is covered with black tape....
Is it visible if the sensors are triggered on the frame?

Anonymous · November 10, 2011, 17:50

i found this site:
m http://codes.rennacs.com/plugins/Toyota ... valier.php m
or
m http://www.airbagsolutions.com/docs/codes/toy.pdf m

Anonymous · November 10, 2011, 20:04

If you need any components, Ive got two undamaged cars here, breaking (both oil burning engines).

Anonymous · November 10, 2011, 21:32

Thanks Dick. I will let you know, then you can send it with the instruments! s8)

s8)