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Airbag warning light issue-Any ideas?


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#1 tam

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Posted 29 March 2016 - 05:44 PM

Hi, please see warning that stays on in pic. Can anyone help with a fix for this? 55 plate 1.6 Desire.

 

Thanks in advance.

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#2 the old'un70

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Posted 29 March 2016 - 10:06 PM

when that happened to my '03 pic, it was the comms 2000 unit are you getting a message also? like circuit 1 fault ???



#3 tam

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Posted 30 March 2016 - 07:11 AM

Thanks Old un!

Will check that out tonight(No access to car today) Can I ask what the comms 2000 unit is and where? Seen it mentioned loads on here but no idea what it is. :con:

 


Edited by tam, 30 March 2016 - 07:14 AM.


#4 the old'un70

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Posted 30 March 2016 - 09:17 AM

basically Comms 2000, its the part that is under the steering wheel, your wiper /light/radio stalks all radiate from this item...generally (afaik) its the flexible cable that is faulty...

 

 

BUT  that's just one possible reason...........

Bob



#5 tam

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Posted 30 March 2016 - 11:04 AM

Brilliant Bob-Thanks. I have one on a 02 plate here. Unsure it will be compatible but will have a look. Got the 05 plate to replace the 02 as it done now. Served me well though.



#6 tam

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Posted 31 March 2016 - 07:44 PM

Ok, I've checked, no other message. It says on display "Airbag Fault" and beeps for a few mins after starting. After driving for 5 mins this warning goes away but airbag light stays on.

Put the OBD reader on it and it shows no faults in system........Puzzled.com



#7 mrickle

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Posted 01 April 2016 - 09:02 PM

you need a more advanced diagnostic setup, i.e lexia or a specialised citroen/peugeot one. i have had to invest in one this week. i had a job removing my airbag, as my foglight switch was knackered. i fitted a 2nd hand (allegedly good) coms unit. its still going off. b4 you do anything, a common fault is the connection under the passenger seat, try wiggling that. otherwise you need to find someone with diagnostic. i just bought the icarsoft i970. it has read and cleared the code but returned. its quite good, even reported the eject on the cd faulty lol


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#8 stimulator

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Posted 02 April 2016 - 08:31 AM

I recall from the distant past some problems with lights for airbags and that turned out to be the firing mechanism. I believe it's called a squib but a search throws up nothing. However AIRBAG does but there are pages of posts to trawl through.

 

 


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#9 tam

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Posted 02 April 2016 - 08:52 AM

Thanks guys, was considering getting the Lexia setup. As for the connector, is it a little 2 inch plug held on to the bar at front under passenger seat? It is held on loosely with a couple of cable ties.

I have read loads of those threads Stimulator so will try and rule what I can out. Wish I knew someone up here in Glasgow with Lexia or whatever. Mrickle does the i970 test the airbag circuits?

 

Appreciate all the advice guys-Thanks



#10 mrickle

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Posted 02 April 2016 - 07:25 PM

yes it does, it read 2 codes cant remember what it said, but i have a feeling its either my 2nd hand comms unit. said something along ther lines of open circuit etc. if you look on youtube about the i970, you will see it does engine,srs(airbag) abs system plus much more. playing around, i pressed radio, and it even told me that the cd changer was missing (have connects 2 ipod which was not connected at the time) and the eject mechanism faulty

 


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#11 tam

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Posted 03 April 2016 - 03:07 PM

Attached to the front bar under the passenger seat, there is a connector that is loosely tied to bar with cable ties and it is cracked, could this be the culprit?



#12 derekg

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Posted 17 April 2016 - 01:47 AM

My car had a similar fault last year and it was a blown bulb on the display . I had checked all cables under seats and a garage put on their tester and it would not find the problem. I had read on here about the bulbs on the display and lo and behold it was. I was lucky.

 



#13 rawthey

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Posted 17 April 2016 - 08:20 AM

My car had a similar fault last year and it was a blown bulb on the display . I had checked all cables under seats and a garage put on their tester and it would not find the problem. I had read on here about the bulbs on the display and lo and behold it was. I was lucky.

 

But i this case the OP's airbag warning lamp is lit all the time so it can't be the bulb that's blown.
 


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#14 gray

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Posted 17 April 2016 - 10:38 AM

But i this case the OP's airbag warning lamp is lit all the time so it can't be the bulb that's blown.
 

 

I think there may be a 2nd warning light for the passenger airbag (Maybe when it is deactivated?).  If this bulb is blown, it can cause the main airbag light to come on.   

 

Try deactivating the passenger airbag, and see if the light comes on ...  ?



#15 gray

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Posted 17 April 2016 - 10:43 AM

Attached to the front bar under the passenger seat, there is a connector that is loosely tied to bar with cable ties and it is cracked, could this be the culprit?

 

Yes .  It is also a common place to cause faults. May need the connectors cleaning.   

 

It could also be the 'squib' in the steering wheel column (Or Comm 2000 unit depending on age).  The winding ribbon eventually fails with metal fatigue after lots of steering actions over the years.... As mentioned by OldUn above.


Edited by gray, 17 April 2016 - 10:44 AM.


#16 rawthey

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Posted 17 April 2016 - 11:16 AM

I think there may be a 2nd warning light for the passenger airbag (Maybe when it is deactivated?).  If this bulb is blown, it can cause the main airbag light to come on.


I'd forgotten about that one, it's just to the left of the main airbag light. If it's failed then that could well be the cause.
 
But, having said that, it's quite rare for warning lamp bulbs to burn out because, apart from the ones for indicators and sidelamps they spend hardly any time lit.
 

Try deactivating the passenger airbag, and see if the light comes on ...  ?

If it doesn't light then a quick fix if you don't have a spare bulb is to borrow one from a less important position. The chances are that you have one or two bulbs in the display which will never ever be illuminated and can be taken as spares, e.g. the Diesel Preheater bulb if you have a petrol engine or the ESP bulb on models without ESP/ASR.

 


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#17 tam

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Posted 12 June 2016 - 10:02 PM

Have lived with this but decided to move it on,  Got error code P1801 Drivers airbag ignitor open circuit. I contacted Graeme in Bradford via Ebay who does the Comms2000 repairs, he advised it could be anywhere in the airbag circuit and after a great and helpful phone conversation, I have decided to go down to Bradford and he will check it out. A wee away day for me anyway. No way could I take comms unit out to send anyway. Going on Thursday so will update afterwards. Thanks for input so far!


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#18 mcdig

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Posted 13 June 2016 - 10:01 PM

Good lad Graeme, knows his stuff with repairing comms2000 units.


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Some people are like slinkies - not really good for anything but they bring a smile to your face when you push them down the stairs!


#19 tam

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Posted 16 June 2016 - 05:00 PM

Further Update

 

I took car to Graeme today and he ruled out comms2000 unit and said fault could be anywhere on airbag circuit as code suggests broken, corroded or loose wire. I have to start with the Airbag ECU but he wasn't sure where it was located on mine. To be fair the guy didn't charge me a penny as he couldn't fix it!

Anyway, any further ideas would be great and the location of airbag ECU would help a lot as a starting point.

 

Thanks guys!



#20 Ozzie

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Posted 17 June 2016 - 06:50 PM

I remember seeing this when I had the lower facia panel off but this was a 03 2.0.

a previous thread might give some clues if you haven't already seen it

http://www.citroenpi...he-ecu-located/
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