Hi, i've looked on the other posts on the forum about this issue but can't find the fault code.

My airbag warning light flashes once then twice, so error code 12. But that isn't on any of the lists.

Any ideas?

Thanks in advance

 

Or is it error code 21, so passenger circuit fault. If so, any suggestions on how to try and resolve it?

But there is a much bigger pause between the 2 flashes then 1, and much shorter between the 1 and 2 flashes. (if that makes sense)

 

Model and Year details in your forum Signature would be a very good idea.

There's a huge difference between the simple Airbag installation on early 4.0 litre XK8's and the complex SRS (Supplementary Restraint System) fitted to the later 4.2 litre models.

Graham

 

Thought I had. Sorry.

It's a 1997 4.0 xk8 convertible.

 

Hi Young old jag
Did you get anywhere with this, I have the same car and mine is on constantly with no flashing.
Thanks
Wayne

 

Hi 2e0wdj,

I had to a buy a 2nd hand instrument cluster as my temperature gauge had also spiked (jump started the car).

With the new instrument cluster the airbag warning light actually flashed the warning code (21) before going to a solid on light. Which then the Jag specialist used the find the problem. It was a dodgy fuse and dodgy wiring going into the main airbag control module next to the steering column.

Cost me about an hour and half's labour and solved the problem. From what I can tell from reading the forums, it's 99% dodgy wiring rather than a dodgy module or airbag.

Good luck.

 

Ok Thanks for the reply, I will go have a look at a few connections in the same area.
Regards
Wayne

 

2e0wdf, it yours is just on and no flashes it's likely the fuse, check left side fuse box on the side of the dash. I forget which fuse number but on my car it's the top left fuse, has a yellow safety cover on it.

 

Hi Jandreu
You were spot on with the fuse, Fuse 4, 10 amp (red), UK car, drivers side fusebox, 4th down from the top on the right side column.
It was blown, I have replaced it but the airbag light is still on and I have checked to ensure there is voltage both sides of the fuse while it is installed to be sure it hadn't just blown again.
Thanks very much for your suggestion. I guess I will have to keep digging.

 

Check the connectors under the seats, unplug them and reseat them. My fuse use to blow every time my wife drove the car and moved the drivers seat forward. I did as suggested above and no more issues.

 

Well the saga continues. I took the jag for its mot today and she failed on only the airbag light being on.
It illuminates during the ignition on bulb check then go out. 2 seconds later its back on permanently.
The 10 amp fuse is ok. It's a 1997 car so only has the basic airbag system not the later full blown srs system.
I've had a quick poke round it this evening with the glove box removed.
I found the white 4 pin interrogation socket behind the passenger side kick panel but I can't find the actual airbag control module. Does anyone know where this is?
The manual shows it on the opposite side to the steering wheel, under the corner of the window next to the BCM, I found the BCM but no sign of the airbag module.
I've done a hard reset but this makes no difference.
Can anyone else shed some light for me?
Many thanks
Wayne.

 

Hi.
If you have a RHD, it is on the RHS, up under the dash. It is a Blue box with 2 block connectors to it.
Fiddly to remove and replace.
I got my replacement off Ebay. It was just plug and play and solved my problem.
I would recommend removing drivers seat so you can get more room.

 

Hi Wal
Yes its a RHD. The manual states it as being on the opposite side to the steering wheel.



Thats probably why I couldn't find it!
Thanks I will pull that side of the car to bits now and update later.
Regards
Wayne

 

Well chaps this is what I have done so far.
1, Found the airbag blue box bolted up on the pillar above my right foot.
2, Removed it to gain access to everything.
3, Pulled the plugs out of the bottom of the box and checked for main 12v supply, back up 12v supply, ground connection. correct signals on the right and left crash sensors, disconnected the two airbags and inserted 2.5 ohm resistors in the sockets bypassing the shorting bars.
You can measure the resistors down at the blue box plugs so it checks the wiring and the steering cassette.
All look ok.
Ordered a replacement blue box and installed. put fuse back in with the termination resistors connected.
Airbag light still comes on approx 3-5 seconds after the check light routine.
4, checked the air bag resistances with a high impedance meter and both are within stated specs (0.7 to 4 ohms).
passenger airbag is 1.7 ohms and the steering one is 2.1 ohms.
Anyone else got any ideas?
Thanks
Wayne

 

Not a fix, but you could buy one of those warning light timers on eBay and use it to get through the MOT. You would then have as much time as you need to fix it properly.

 

sounds like a temp plan can you point me in the right direction?

 

You would have to rewire the light with something like this:-

http://m.ebay.co.uk/itm/CAR-SRS-AIRB...-/272213311587

 

I have code 12 as low battery voltage.

That would not normally be the module at fault.

 

Thanks for the box info.
I have ordered a couple of replacement front impact sensors as well. They will be here today.
V8JAG, The early jags system doesn't flash the light to give code error messages.
When I turn on the ignition, the first illumination is the bulb check 2 second. Once that has finished the instrument pack then takes the order from the airbag system to illuminate continuously.
I,m trying to find out why it is sending that fail command to the instrument pack.
I'm guessing that the correct signal from the airbag is probably some sort of pulse on/off sequence that the instrument pack looks at to keep the airbag light off.
If it sees it missing or permanently on it illuminates the fault lamp.
I'll keep trying as this thread will probably be useful one day to someone else.
Keep the ideas coming and thanks for reading.

 

Well it looks like it was one of the front impact sensors.
I changed them out today and we seem good to go.
Just to let you know, at first I just plugged the new ones in and left them draped over the radiator to test.
This just caused the airbag blue box to start bleeping at me.
I then screwed them in with the 3 screws each and this time the test was good. No alarm or dash warning light.
I've spent this evening put the cars dashboard back together and its off to the MOT man in the morning (fingers crossed).
Thanks to everyone for their time and support.
Regards
Wayne