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Old 11-10-2017   #1
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Pre Tensioner Resistance?

Hi all. My Cat C that was finished has just thrown up an Airbag error and MES throws up a resistance error on the drivers pre tensioner, which I have changed for a used one.

I've run a ampage check on MES and the passenger one which is OK is 2 Ohms and the drivers is 7 Ohms which is obviously throwing up the error and airbag light.

My question is, does any of you very clever people out there know whether this is likely to be an error with the pre-tensioner itself or within the wiring somewhere?

It's a real pain because to remove it, you have to take out the rear seats and side panel again. Grrrr

Thank you as always.
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Old 11-10-2017   #2
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Re: Pre Tensioner Resistance?

If the pretensioner is pyrotechnic it'd be unusual for it to fail to such a value IMHO. More likely a slightly duff connection I'd expect.
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Old 11-10-2017   #3
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Re: Pre Tensioner Resistance?

I have to take the seats out to get to it anyway, but Iíll have a look at the wires just in case, cheers.
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Old 11-10-2017   #4
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Re: Pre Tensioner Resistance?

As you've sourced a used one, there could be differences. Check any labels.
Used one could be 'used', so no good. Was it available because it was from a crashed car? What is the resistance of the one you removed?
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Old 11-10-2017   #5
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Re: Pre Tensioner Resistance?

Quote Originally Posted by portland_bill View Post
As you've sourced a used one, there could be differences. Check any labels.
Used one could be 'used', so no good. Was it available because it was from a crashed car? What is the resistance of the one you removed?


I always buy used non deployed ones. Never had a problem. Think Iíve thrown the deployed one but might have an old one knocking around somewhere. I buy seatbelts and pretensioners together all the time.
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