Technical Curtain Airbag error

Currently reading:
Technical Curtain Airbag error

townfieldlass

New member
Joined
Sep 15, 2010
Messages
7
Points
3
Location
Staffordshire
Hi, My 54 plate Punto Sporting 1.4 Mk2b had the Airbag warning light on. Took it to the garage and they gave me the details. They have told me its something to do with the curtain airbag, the bits that go with that e.g. wiring or the Aribag ECU but they can't be specific.

Anyone had this problem and how did you fix it?
Does anyone have a workshop manual or wiring diagram for the 1.4?

Thanks :):bang:
 
Hi, My 54 plate Punto Sporting 1.4 Mk2b had the Airbag warning light on. Took it to the garage and they gave me the details. They have told me its something to do with the curtain airbag, the bits that go with that e.g. wiring or the Aribag ECU but they can't be specific.

Anyone had this problem and how did you fix it?
Does anyone have a workshop manual or wiring diagram for the 1.4?

Thanks :):bang:

Curtain Airbag = Pillar between the Front and rear doors if a 5dr or the Pillar behind door on 3dr

did they give you the fault code - as it should say which side
Eitherway - get it checkedout and fixed - could save your life :)

Ziggy
 
Curtain Airbag = Pillar between the Front and rear doors if a 5dr or the Pillar behind door on 3dr

did they give you the fault code - as it should say which side
Eitherway - get it checkedout and fixed - could save your life :)

Ziggy
I


It's a 3dr sporting. My error is airbag TRW MY 99 (2F-2L-2T-I)

Error curtain airbag, explosive charge drivers side - S.C. To ground, intermittent

Probable causes:
Connections faulty, wiring continuity, wiring insulation, clock spring faulty, squib faulty, control unit faulty.

I am aware it's a safety issue however the garage have quoted over £1000 to investigate and fix it which I can't afford. :-(
 
I
It's a 3dr sporting. My error is airbag TRW MY 99 (2F-2L-2T-I)
Error curtain airbag, explosive charge drivers side - S.C. To ground, intermittent
Probable causes:
Connections faulty, wiring continuity, wiring insulation, clock spring faulty, squib faulty, control unit faulty.
I am aware it's a safety issue however the garage have quoted over £1000 to investigate and fix it which I can't afford. :-(

To Ground Intermittent - So its basically saying there is a problem with a Inconsistant connection - on the Negative to body route?

And £1000 is ALOT! Try a different garage - even an Auto-Electrician as they know more about air bags :)
Since you know the fault and Location? let them have the car to see why they think it'll cost

ziggy
 
WARNING - if you decide to have a look yourself, observe the safety precaultions around airbag systems - mainly the need to disconnect the battery and leave for 15-20 mins for any charge to discharge - don't want any accidental inflations!

Just to explain a little from the code reader results:

System type: 2F-2L-2T-I. I think this indicates what parts are connected, something like:

2 x front airbags
2 x side airbags
2 x curtain airbags
1 x inertia switch?

Curtain airbag - you know where these are now.
Explosive charge - the device that causes the airbag to inflate.
Drivers's side - that's norrowed it down!
S.C. to ground - Short Circuit to ground.
Intermittent - oh dear -fault comes and goes!

So, the airbag control unit (mounted on the floor in front of your centre console) monitors the various sensors and airbags for faults including short circuits to 12V or to Ground and for Open Circuits.

Probable causes:
Connections faulty - more likely to cause open circuit than SC to ground.
Wiring continuity - again, lack of or poor continuity is more like OC than SC.
Wiring insulation - this is nearer - if for instance a wire has chaffed, it could be touching earth intermittently.
Clock Spring faulty - Hmm - the clock spring is used to connect the airbag in the steering wheel back to the control unit. Not likely to affect the curtain airbag.
Squib faulty - the squib is the explosive charge. Indeed this could have an intermittent earth fault.
Control unit faulty - possible but I would say unlikely.

Faulting strategy? Sort yourself a code reader for a tenner and adapt it to read/reset the airbag unit. I did this for a Mk2b airbag problem and wrote a guide:

https://www.fiatforum.com/punto-gui...eset-ecu-airbag-errors-mk2-tenner-laptop.html

Now you can check for yourself to see the fault logged and also reset it while you dig deeper. Maybe try disconnecting that airbag, though that may just force a different error (sensor missing or faulty). If left and right airbag units are the same, try swapping them to see whether the fault moves.

If we can trust Haynes, here's the wiring for the curtain airbags:

Driver's side curtain airbag:
Pin 1 goes to Control Unit connector B18 (green)
Pin 2 goes to Control Unit connector B17 (yellow/red)
Pin 3 goes to Earth (black)

Passenger side curtain airbag:
Pin 1 goes to Control Unit connector B19 (blue)
Pin 2 goes to Control Unit connector B20 (orange)
Pin 3 goes to Earth (black)



red
 
Last edited:
For a grand, a few of us could go to Staffordshire, fix the car, have a good **** up to celebrate and stay overnight in a 4-star hotel, all expenses paid.
 
Thanks for the detail - that seems not too difficult to start looking at only downside is I don't own a PC :-( I'm a mac lady so going to have to beg and borrow from relatives with that but the rest seems pretty clear. I'm gutted that the garage want that kind of money - that was Platts in longton. It's such an annoying problem!! :)
 
Back
Top