Airbag Low capacitance on Squib ???????

[jruibarroso]

Hi , after erase crash data and simulate the passenger belt tensioner with a 2.7 OHMs resistor , diagnose shows this strange error " B2118 Passenger Side, Side mount Airbag Low capacitance on Squib "

Anybody have idea what this means ??

PS. also tryied 2.2 , 2.7 and 3.3 OHMs and results are the same. If i let circuit open , it says "Open circuit on passenger side airbag"

[rrador]

was that airbag replaced?

some airbags have a capacitor in the connector, check if yours has one...

[jruibarroso]

it's the airbag inside chair , lateral airbag , i can't see it's plug

I've already test some capacitors (100nF, 220nF, 470nF and 1uF) in paralell with resistor but no success

[randewoo]

I had some experience with Volvo XC70 and the same problem when I cut original connectors. Connector has a circuit inside with capacitor and resisitor and you need to connect resistor after that circuit or emulate it.

[jruibarroso]

any idea about capacitor value ?

[randewoo]

No idea. Let's check other connector which is easy to access and measure capacitance and resistance.

[szkeptmen]

No idea. Let's check other connector which is easy to access and measure capacitance and resistance.

The capacitor not parallel with the airbag or tensioners...
Look another connectors.
Is it a Ford ?
Many times they are using 470 nF
Check.
WBR

[TDA2030]

So how is capacitor in circuit ? It must be in series or paralell with inductor of explosive

[meteor80]

The capacitor not parallel with the airbag or tensioners...
Look another connectors.
Is it a Ford ?
Many times they are using 470 nF
Check.
WBR


If it is ford then You can use 470nF and resistor in series.
But In Mondeo and Focus there sometimes after crash You need to change airbag unit because it is broken after activate airbag.
I had that couple times.

[TDA2030]

____
You mean -------||--------/\/\/\/\-----
47nF 3R3

[meteor80]

Yes, that should wrk.

[stundentas]

____
You mean -------||--------/\/\/\/\-----
47nF 3R3

I think it must be -------||--------/\/\/\/\-----
47nF 2R2[/QUOTE]

[knok]

I think it must be -------||--------/\/\/\/\-----
47nF 2R2[/QUOTE]


practice ... capacitor isn't destroyed when airbag blow up , so just put there one resistor....

[jruibarroso]

Only one resistor don't work, keeps says low capacity . This why I opened this thread ...



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[einet]

Hi,
use this, this what i use to test the timming from some airbags.

[nelmedeiros]

The capacitor not parallel with the airbag or tensioners...
Look another connectors.
Is it a Ford ?
Many times they are using 470 nF
Check.
WBR


yes tested and work resistor serial whith capacitor 470nf

[Yhoni]

yes tested and work resistor serial whith capacitor 470nf

If it is ford then You can use 470nF and resistor in series.
But In Mondeo and Focus there sometimes after crash You need to change airbag unit because it is broken after activate airbag.
I had that couple times.

I think it must be -------||--------/\/\/\/\-----
47nF 2R2

What is the correct capacitance,please, 47nf of 470nf?
and
What type of capacitor did you use, please? (Electrolytic, polyester, ceramic, etc).


Thanks.

[Yhoni]

What is the correct capacitance,please, 47nf of 470nf?
and
What type of capacitor did you use, please? (Electrolytic, polyester, ceramic, etc).


Thanks.

up!!

Hello friends, anyone to have experience over this, please?

Thanks.

[Yhoni]

What is the correct capacitance,please, 47nf of 470nf?
and
What type of capacitor did you use, please? (Electrolytic, polyester, ceramic, etc).


Thanks.


do anyone know the answers, please?

Thanks.