Airbag warning light on citroen relay 2.2 hdi 2005

Discoduck

Hi Turn ignition on Airbag warning light comes on , dash goes through test , Airbag light goes off , then a second later comes back on again and stays on.
The van has been converted from new by Wildax conversions .
Two front swivel seats .Single Airbag on drivers side (rhs).
No wiring under seats ,but has a twin cable with yellow connector (not connected to anything) I am thinking this may have been for a double passenger seat in original manufacture. so may have been switched off on ECU
I dont know if its fitted with seat belt tension er`s, but I think it maybe, as there is wiring going to the door pillar on drivers door leading to seat belt. .
any thoughts before I get started on this problem in readyness for MOT.
rgds.dd

:idea:
 

gordy

Check the connectors at the seat belt tensioners if this is what they are. Tensioner holds a squib that goes off and tightens the belt. Disconnect battery first. Removing and refitting may regain conductivity. Check for corrosion on terminals.
 
harrow

harrow

Forum Member
Discoduck said:
Hi Turn ignition on Airbag warning light comes on , dash goes through test , Airbag light goes off , then a second later comes back on again and stays on.
The van has been converted from new by Wildax conversions .
Two front swivel seats .Single Airbag on drivers side (rhs).
No wiring under seats ,but has a twin cable with yellow connector (not connected to anything) I am thinking this may have been for a double passenger seat in original manufacture. so may have been switched off on ECU
I dont know if its fitted with seat belt tension er`s, but I think it maybe, as there is wiring going to the door pillar on drivers door leading to seat belt. .
any thoughts before I get started on this problem in readyness for MOT.
rgds.dd

:idea:
Click to expand...

The normal first place to look is the connectors under the seats.

As you seats have already been changed it maybe worth comparing the wiring with a original basic van, under the seats.
 

Discoduck

air bag warning light on citroen relay 2.2 hdi 2005

Hi update on the above now out of mot .Have found the following .
Pirotecnics on seat belt pre tensioners for driver and passenger.
Have striped them out both were in good clean condition.
Have fitted 3.3 ohm resisters to both also 3rd passenger wiring connector for double seat got a 3.3 ohm resister.
Air bag warning light still on.
Removed steering wheel and air bag and the clock spring.
Another 3.3ohm resistor plugged in.
Air bag light still on ,am thinking that the fault may be stored in the ecu or somewhere.
 

sparrks

Discoduck said:
Hi update on the above now out of mot .Have found the following .
Pirotecnics on seat belt pre tensioners for driver and passenger.
Have striped them out both were in good clean condition.
Have fitted 3.3 ohm resisters to both also 3rd passenger wiring connector for double seat got a 3.3 ohm resister.
Air bag warning light still on.
Removed steering wheel and air bag and the clock spring.
Another 3.3ohm resistor plugged in.
Air bag light still on ,am thinking that the fault may be stored in the ecu or somewhere.
Click to expand...

I think my old Expert was 1.8-2.0 ohm......... not a hundred percent sure though.
 
The laird

The laird

Forum Member
Be carefull when poking or prodding about in case you deploy airbags.no mention about steering wheel ring for air bag?Has the vehicle ever been involved in a bump?
I would prefer a code reader to read the fault prior to using multi meter etc!
 

Mick H

Discoduck said:
Hi Turn ignition on Airbag warning light comes on , dash goes through test , Airbag light goes off , then a second later comes back on again and stays on.
The van has been converted from new by Wildax conversions .
Two front swivel seats .Single Airbag on drivers side (rhs).
No wiring under seats ,but has a twin cable with yellow connector (not connected to anything) I am thinking this may have been for a double passenger seat in original manufacture. so may have been switched off on ECU
I dont know if its fitted with seat belt tension er`s, but I think it maybe, as there is wiring going to the door pillar on drivers door leading to seat belt. .
any thoughts before I get started on this problem in readyness for MOT.
rgds.dd

:idea:
Click to expand...

I had a similar problem with our Renault based motorhome. The original seats had been changed, by the convertor, so there were no longer any seat pre tensioners fitted.

In my case, the air bag warning light illuminated, intermittantly. We drove the van for a few thousand miles, with this fault, because I was convinced that the fault wasn't dangerous, with no chance of the air bag deploying.

After failing to accurately diagnose the cause myself ( it could have been several things), I used the services of a local mobile diagnostics expert. He was fantastic, and I learned a lot from him.
It turned out to be the steering wheel rotary switch. He replaced it, and it has been fine, since.
 

Chris356

You will need to have it plugged into a diagnostic will will tell you your problem
 

molly 2

Have a Google, seem to remember a reset procedure . Sorry can't be more specific.
 

Discoduck

I had an auto electrician look at it just before xmas . His bag of tricks all 3 of them wouldnt communicate with the ecu.
There is a very good auto shop near us that if I get stuck will sort it .AT A PRICE.
I have got to check the clock spring yet but a 3.3 ohm placed in the connector should have taken the warning light off.
There are a couple of reset procedures involving key on key off ect ,but that will come later there is also a collision censer
under the front grill that ive yet to find just to check the connecting plugs.
I have drivers seat out at the moment just to check for cables from old seats.
Ive spoken to Wildax the original m/h converter regarding seat replacements and they tell me that sometimes they have problems with airbag lights .They also use 3.3 ohm resisters when required.
Not putting camper on road till March or April so a bit of time to play yet.
rgds.dd
 

mandrake

Discoduck said:
Hi update on the above now out of mot .Have found the following .
Pirotecnics on seat belt pre tensioners for driver and passenger.
Have striped them out both were in good clean condition.
Have fitted 3.3 ohm resisters to both also 3rd passenger wiring connector for double seat got a 3.3 ohm resister.
Air bag warning light still on.
Removed steering wheel and air bag and the clock spring.
Another 3.3ohm resistor plugged in.
Air bag light still on ,am thinking that the fault may be stored in the ecu or somewhere.
Click to expand...

you could have to have the air bag light reset on a computer if theres been a fault even if its been cured . my bmw i had the airbag light was on and the i drive kept on telling me there was a fault even though no fault could be found on the computer .you could reset it and in no time the warning light came back on . i had a reset tool available that could reset all lights including abs and airbag ones .not bmw approved there megga bucks but a very good clone that worked well,just before the last test i had done i reset everything ,mot passed next couple of days lights back on.i also carried out a reset just before it left my ownership ,no fault showing just a thought ,all airbag connectors on my bmw were coloured yellow ,so the connectors you have under the passenger eat were for sensors in the seat ,if you have a passenger airbag in there is or was probably a sensor in the seat to deactivate that airbag in case no passenger is in it and to reactivate it the air bag that is when a passenger is sat there ,many cars and van have that now . only real way with air bag faults is a computer to let you know whats wrong unfortunately you can search forever and not find the problem .one major problem the bmw cars suffered from with air bag faults was the passenger seat sensor ,it was like a mesh in the seat base only problem was you could eaily break it if you knelt on the seat base and it was not replaceable either ,the only cure was a new seat base hundreds of pounds from bmw ,but you could buy a shunt that fitted in the sensor conector that fooled the air bag into beliving there was a passenger in the seat thus activating the air bag and not showing any fault code through the i drive hence no air bag light on constantly
 
Last edited by a moderator:

slowpace

well her my penny worth fiat 2.8 air bag ligh on no one could turn it off
send away no fault
elec went all throught wires no fault after it had beeen away
when he check it with ecu connect airbag light on the other tes he tryed he turn it off with no ecu
turns out ecu up the creak £400
my m/h has 2 ecu one eng // one air bag

Check fiat fourm
 

mandrake

slowpace said:
well her my penny worth fiat 2.8 air bag ligh on no one could turn it off
send away no fault
elec went all throught wires no fault after it had beeen away
when he check it with ecu connect airbag light on the other tes he tryed he turn it off with no ecu
turns out ecu up the creak £400
my m/h has 2 ecu one eng // one air bag

Check fiat fourm
Click to expand...

yes many cars vans have more than one ecu fitted one for fuel management ,one for the airbags and one for the engine management ,and i belive mercedes have one for other systems . the big top ones have/had electronic braking systems i think they have another ecu for that i know the e class 280 d i had after the c class 250 i had did have one ,the electronic braking unit was over a grand to replace on its own without the fitting cost .multi ecu are great whilst there all good mates and talk nicely to each other a real pain though when one or the other have a lovers tiff and stop talking though .
 

Discoduck

https://www.wildcamping.co.uk/forums/self-build-motorhome/54544-airbag-warning-light-

Booked in to auto electrical for this Thursday . Them MOT next door.
will post results .thanks for all the help.
rgds.dd
 

channa

Good Luck with the MOT. I suspect like Mandrake and Helen262 suggest the system will require re setting.

My Ducato had the engine warning light on, In the end took it to a Fiat specialists in Leeds who put it on the OBD and the faults listed the thing shouldn't have started nor driven !! It turned out the faults had been rectified at some point but the system had not been cleared down. A bit like clearing the cache memory on your PC.

I have a rover with the airbag light on a common fault normally caused by loose connectors under the seat, They seem ok to me, and the forums suggest ways of clearing the lights. I haven't invested too much time but the light remains on. I suspect I need to take my own advice and clear the ECU

Channa
 

Rob H

airbag warning light on citroen relay 2.2 hdi 2005

Hi Discoduck.

You mention no wiring connected to anything under the seat, think there should be a 'load sensor' that the seat is occupied ? may depend whether your citroen had fitted a 'seat belt not fastened warning' which could be a 'common' sensor to also trigger the airbags when necessary on the occupied seat /s in various model seating configurations ? may be worth exploring how the installers addressed this.

As previous comments would expect a fault code to help indicate where the problem lies, often see ... resistance high ... fault for intermittent or disconnected airbag wiring.

Rgrds,

Rob H
 
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