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Author Topic: Airbag Again :(  (Read 1355 times)

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Jimbob

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Airbag Again :(
« on: 01 May 2009, 07:40:35 »
My Drivers side airbag circuit has sent the light on again  >:(

Resistance on the circuit should be 2.5 ohms ish, mine has gone up to 6.5 again.  

Last (and previous) times, unplugging and replugging the airbag in the seat back resolves this, even used a switch / contact cleaner on it last time, which brings it down exactly where it should be, so this connector MUST be the issue.

Anyone any ideas how I can resolve this permanently?  Getting a bit of a pain now.
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MutantCav

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Re: Airbag Again :(
« Reply #1 on: 01 May 2009, 07:42:35 »
Replace the seat??
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Jimbob

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Re: Airbag Again :(
« Reply #2 on: 01 May 2009, 07:46:57 »
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Replace the seat??


Lol, that should do it!
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Re: Airbag Again :(
« Reply #3 on: 01 May 2009, 07:49:33 »
There you go problem sorted lol Whats seat do you need? :y lol
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Re: Airbag Again :(
« Reply #4 on: 01 May 2009, 08:16:15 »
Try the contact cleaner again, it seems to have resolved my issue (fingers crossed).

I've used the contact cleaner 3 times now, last time was 15 months ago.
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Re: Airbag Again :(
« Reply #5 on: 01 May 2009, 09:06:49 »
is it the seat or the wheel this time?  I recall it was seat last time, but doesn't mean its the same again.

If it is the seat, I guess 2ohm resistor across seat contacts, leaving seat disconnected, and regular live data to prove if its in the seat or in another part of loom?

There is a tis article about seat to squib connectors, think resolution was to solder it
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Jimbob

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Re: Airbag Again :(
« Reply #6 on: 01 May 2009, 09:10:49 »
Quote
is it the seat or the wheel this time?  I recall it was seat last time, but doesn't mean its the same again.

If it is the seat, I guess 2ohm resistor across seat contacts, leaving seat disconnected, and regular live data to prove if its in the seat or in another part of loom?

There is a tis article about seat to squib connectors, think resolution was to solder it


Yes the seat.

If you remember when we did live data the 1st time, the floor wires were fine.

Its deffo the yellow connector that connects to the airbag itself thats the issue, my live data has proved that time and time again.

doesnt look to be a soldering solution possible as its the 2 small pins the connector goes onto.

seat is early MV6 fabric one.


can have a look over the weekend if we get a chance.

(wheel circuit ever so slightly high, but always has been and not been a problem)
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Re: Airbag Again :(
« Reply #7 on: 01 May 2009, 09:13:45 »
Quote
Quote
is it the seat or the wheel this time?  I recall it was seat last time, but doesn't mean its the same again.

If it is the seat, I guess 2ohm resistor across seat contacts, leaving seat disconnected, and regular live data to prove if its in the seat or in another part of loom?

There is a tis article about seat to squib connectors, think resolution was to solder it


Yes the seat.

If you remember when we did live data the 1st time, the floor wires were fine.

Its deffo the yellow connector that connects to the airbag itself thats the issue, my live data has proved that time and time again.

doesnt look to be a soldering solution possible as its the 2 small pins the connector goes onto.

seat is early MV6 fabric one.


can have a look over the weekend if we get a chance.

(wheel circuit ever so slightly high, but always has been and not been a problem)
Have you read the tis article, may give clues on the soldering?  Not got tis handy, so can't give you the ref.
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Jimbob

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Re: Airbag Again :(
« Reply #8 on: 01 May 2009, 09:15:11 »
Yes. ages ago,

iirc it was for the next connector down, which hasnt been an issue for me, will dig it out again......
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Re: Airbag Again :(
« Reply #9 on: 01 May 2009, 09:17:57 »
Quote
Yes. ages ago,

iirc it was for the next connector down, which hasnt been an issue for me, will dig it out again......
unless the squib itself is 'dangle berries'ed?  IIRC, you can't measure the resistance of squib with meter, only via live data from ECU...
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Re: Airbag Again :(
« Reply #10 on: 01 May 2009, 09:18:38 »
Fit a 3.3ohm resistor in parralel with the airbag.

The airbag will still fire and the ECU will be happy.
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Jimbob

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Re: Airbag Again :(
« Reply #11 on: 01 May 2009, 09:24:21 »
Yup If I am reading it correctly that for the other end of the cable.
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Jimbob

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Re: Airbag Again :(
« Reply #12 on: 01 May 2009, 09:25:52 »
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Quote
Yes. ages ago,

iirc it was for the next connector down, which hasnt been an issue for me, will dig it out again......
unless the squib itself is 'dangle berries'ed?  IIRC, you can't measure the resistance of squib with meter, only via live data from ECU...



Yup, I have the ECU live data.


Mark, I know my electronics aint good, but that doesnt make sense to me  :-[
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TheBoy

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Re: Airbag Again :(
« Reply #13 on: 01 May 2009, 09:27:58 »
Quote
Fit a 3.3ohm resistor in parralel with the airbag.

The airbag will still fire and the ECU will be happy.
Seem to recall something really odd about the SA6 setup (but in a different car) with the way the components short themselves out when good and o/c when not so good (hence why you can't use a meter to measure stuff).  Based on that, I think I'd be down the scrappy getting a new side bag if possible, as a longer trm solution.
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Re: Airbag Again :(
« Reply #14 on: 01 May 2009, 09:30:10 »
Quote
Quote
Quote
Yes. ages ago,

iirc it was for the next connector down, which hasnt been an issue for me, will dig it out again......
unless the squib itself is 'dangle berries'ed?  IIRC, you can't measure the resistance of squib with meter, only via live data from ECU...



Yup, I have the ECU live data.


Mark, I know my electronics aint good, but that doesnt make sense to me  :-[
It will make the ECU see a resistance of around 1.7 (bit too low) - 3ohms, thus ecu will be happy, and not bring on light.  In accident, that side bag may or may not fire. I think ecu likes to see 2-4ohms (entirely from memory), so maybe 4o better?
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