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BHZ661
Barcelona


Joined: 03 Feb 2015
Posts: 1334
Location: Milton Keynes


PostPosted: Tue Feb 12, 2019 1:32 pm    Post subject: Airbag light - cup steering wheel MOT failure Reply with quote

Took the car for MOT and it failed on the airbag warning light not coming on , car is fitted with a cup steering wheel ,airbag light has been resistered out , Im told the law altered last May ,the light has to come on and then go out rather than not on at all
Seems as tho its going to be a annual thing for MOT in fitting old wheel and then swopping back , anybody else had problems

Gary
 
  
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Stoo.c
Monza


Joined: 07 Apr 2014
Posts: 205
Location: Hertfordshire


PostPosted: Tue Feb 12, 2019 2:29 pm    Post subject: Reply with quote

That's true that the rules have changed although I dare say many testers will let it through still.
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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7262
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Tue Feb 12, 2019 2:33 pm    Post subject: Reply with quote

If the resistor has been fitted and the bulb is working then the light should come on and go off as normal. Are you sure that is why it failed? It would also fail because an airbag which was originally fitted is not present. That would make a lot more sense.

MC
 
  
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BHZ661
Barcelona


Joined: 03 Feb 2015
Posts: 1334
Location: Milton Keynes


PostPosted: Tue Feb 12, 2019 2:40 pm    Post subject: Reply with quote

MisterCorn wrote:
If the resistor has been fitted and the bulb is working then the light should come on and go off as normal. Are you sure that is why it failed? It would also fail because an airbag which was originally fitted is not present. That would make a lot more sense.

MC


He said because of the light , and the law change , still looks like going to be annual Mot prep job
 
  
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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7262
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Tue Feb 12, 2019 2:42 pm    Post subject: Reply with quote

BHZ661 wrote:
MisterCorn wrote:
If the resistor has been fitted and the bulb is working then the light should come on and go off as normal. Are you sure that is why it failed? It would also fail because an airbag which was originally fitted is not present. That would make a lot more sense.

MC


He said because of the light , and the law change , still looks like going to be annual Mot prep job


Fair enough, but if your light isn't coming on now, I don't see how swapping your steering wheel back will change that? With the resistor fitted, as far as the airbag controller is concerned your airbag is present.

MC
 
  
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BHZ661
Barcelona


Joined: 03 Feb 2015
Posts: 1334
Location: Milton Keynes


PostPosted: Tue Feb 12, 2019 2:50 pm    Post subject: Reply with quote

[quote="MisterCorn"]
BHZ661 wrote:
MisterCorn wrote:
If the resistor has been fitted and the bulb is working then the light should come on and go off as normal. Are you sure that is why it failed? It would also fail because an airbag which was originally fitted is not present. That would make a lot more sense.

MC


He said because of the light , and the law change , still looks like going to be annual Mot prep job


Fair enough, but if your light isn't coming on now, I don't see how swapping your steering wheel back will change that? With the resistor fitted, as far as the airbag controller is concerned your airbag is present.

I meant i will have to go back to the airbag wheel and connect all wiring back up, get it tested and then swop back over with cup wheel and resster
 
  
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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7262
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Tue Feb 12, 2019 2:59 pm    Post subject: Reply with quote

But if your light is not coming on now, what will make it come on when you swap the wheel and the wiring? The point of the resistor is to mimic the airbag. I.E. the light comes on and goes off as normal with the resistor fitted. If this isn't happening now I don't see how swapping your wheel will help?

MC
 
  
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BHZ661
Barcelona


Joined: 03 Feb 2015
Posts: 1334
Location: Milton Keynes


PostPosted: Tue Feb 12, 2019 3:15 pm    Post subject: Reply with quote

MisterCorn wrote:
But if your light is not coming on now, what will make it come on when you swap the wheel and the wiring? The point of the resistor is to mimic the airbag. I.E. the light comes on and goes off as normal with the resistor fitted. If this isn't happening now I don't see how swapping your wheel will help?

MC


Everything was ok before swop , unless ive put the resister in the wrong place if thats possible even , or there is another way to do it different to what ive done to minic light on and then off
 
  
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Jay.
Montreal


Joined: 20 Oct 2015
Posts: 582
Location: Brize Norton


PostPosted: Tue Feb 12, 2019 4:04 pm    Post subject: Reply with quote

BHZ661 wrote:
MisterCorn wrote:
But if your light is not coming on now, what will make it come on when you swap the wheel and the wiring? The point of the resistor is to mimic the airbag. I.E. the light comes on and goes off as normal with the resistor fitted. If this isn't happening now I don't see how swapping your wheel will help?

MC


Everything was ok before swop , unless ive put the resister in the wrong place if thats possible even , or there is another way to do it different to what ive done to minic light on and then off


Have you put the old wheel back on, and did that solve the problem?

The resistor can only really go in one place, so I'd be amazed to see if you had got it wrong.

As others have said, the light should still come on even with the resistor in place
_________________
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BHZ661
Barcelona


Joined: 03 Feb 2015
Posts: 1334
Location: Milton Keynes


PostPosted: Tue Feb 12, 2019 4:10 pm    Post subject: Reply with quote

I havent refitted yet Jay that will be a weekend job , there must be another problem some where then it appears Confused
 
  
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NedHan79
Montreal


Joined: 08 Nov 2018
Posts: 572



PostPosted: Tue Feb 12, 2019 7:16 pm    Post subject: Reply with quote

I have just checked my car and my light dosnt come on either. It’ll be interesting to see how you get on with the original wheel back on
 
  
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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7262
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Tue Feb 12, 2019 7:26 pm    Post subject: Reply with quote

I think it should be on for a few seconds on ignition position 1 then go off.
If it isn't doing that I would plug it in to diagnostics and read the codes. If you are near M1 J26 I'm happy to check for codes.

MC
 
  
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Marky911
Magny-Cours


Joined: 04 Jun 2009
Posts: 2639



PostPosted: Tue Feb 12, 2019 7:28 pm    Post subject: Reply with quote

Well I never. Mine doesn’t light up either.

Scrub that, it does.
It’s along at the right hand end of the row.
 
  
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IanG1
Silverstone


Joined: 08 Jan 2016
Posts: 127



PostPosted: Tue Feb 12, 2019 7:52 pm    Post subject: Reply with quote

Mine comes on and goes off just like it did before the bag was removed. If your doesnt come on at all my guess would be the bulb rather than anything you have done. If you got the resistor bit wrong more likely the light would stay on rather than off
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NedHan79
Montreal


Joined: 08 Nov 2018
Posts: 572



PostPosted: Tue Feb 12, 2019 8:19 pm    Post subject: Reply with quote

Got that mark. I flicked the key on and off a few times. It only seems to come on the first time you turn after putting the key in
 
  
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Marky911
Magny-Cours


Joined: 04 Jun 2009
Posts: 2639



PostPosted: Tue Feb 12, 2019 9:07 pm    Post subject: Reply with quote

Yeah Ned, Mine must have lit up and gone out by the time I spotted where it was on the dash. Then subsequent cycles didn’t light it up, hence my first post.

I googled where the light should be, went back out and it came on and went off as it’s meant to.
 
  
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BHZ661
Barcelona


Joined: 03 Feb 2015
Posts: 1334
Location: Milton Keynes


PostPosted: Wed Feb 13, 2019 6:14 am    Post subject: Reply with quote

After searching Google and Porsche workshop manual , as has been said only works when key inserted in ingition comes on for a few seconds an then goes out , so it appears i dont have a problem just not been checked properly MOT time, annoying and frustrating Smile

Thank you everybody for imput thumbsup
 
  
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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7262
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Wed Feb 13, 2019 6:48 am    Post subject: Reply with quote

At least there is no fault. If he is doing his job properly he will fail it for not having the airbag in place, so you aren't out of the woods yet. Given that it takes 10 minutes to swap it over, I would change it for the MOT anyway just to make sure.

MC
 
  
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