air bag ECU

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

Moderator: Moderators

NinoB
1.8 16v
Posts: 98
Joined: Tue Jul 22, 2014 10:39 am

air bag ECU

Post by NinoB » Thu Jun 28, 2018 1:42 pm

hi lads

seat belts and airbag keep flashing on my dashboard, initially i scanned left and right airbags and they are ok,so i scanned with pp2000 i got the pictures below:
likewise my car is D9 , maybe there is a fuse somewhere that i can check? airbag ecu fuse.
Attachments
20180628_114924.jpg
does the number by the right matters, that is A0, if i want replacement? and where can get similar type because most i see are with different alphabets
(73.56 KiB) Not downloaded yet

User avatar
steve_earwig
Moderator
Posts: 18944
Joined: Thu Oct 04, 2007 6:09 pm
Location: Jastrebarsko, Croatia http://www.jastrebarsko.hr/lokacija/

Re: air bag ECU

Post by steve_earwig » Fri Jun 29, 2018 9:43 am

I was having a horrible time reading that, erm, capture
Image

Could that not just be poor connections on the seat wiring? Anyone?
Unskilled meddling sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - fuel leaks galore!
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - It's alive!!

User avatar
Doggy
Mod with a 2.2 HDi, De-Fapped!
Posts: 10025
Joined: Mon Oct 13, 2008 11:49 pm
Location: Northants

Re: air bag ECU

Post by Doggy » Fri Jun 29, 2018 1:04 pm

Could be. Those are all the detonators - use caution. :supafrisk:

I would look for something common to all 4 circuits - the control unit itself, it's multipole connector and it looks like there's a bunch of connectors (one for each cct) right at the front of the console or under the radio.

Bear in mind this is failing the startup continuity test, which probably applies micro amperes to each "pyrotechnic device", it doesn't take much connector degradation to be seen as an open circuit.

Other possibility is obviously the control unit itself.

Could the OP borrow one to test from another car or liberate one from a scrapyard?
2003 HDi 2.2 6-speed Exec Estate

User avatar
GingerMagic
3.0 24v
Posts: 3049
Joined: Fri Apr 06, 2012 9:02 pm
Location: Bournemouth

Re: air bag ECU

Post by GingerMagic » Fri Jun 29, 2018 3:30 pm

I'm inclined to think it's the ECU that's faulty - maybe ingress of spilt Red Bull...?

The pretensioners are not showing the fault as far as I can tell...
1999 T4 family wagon
2005 Vauxhall Meriva
1998 406 V6 Coupe - Midlife crisis..!
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

NinoB
1.8 16v
Posts: 98
Joined: Tue Jul 22, 2014 10:39 am

Re: air bag ECU

Post by NinoB » Fri Jun 29, 2018 9:04 pm

I scanned the left and right seat belt air bag.. It show no fault.. While the instrument cluter airbag and seat belt keeps blinking .. So where scanned the airbag ecu.. Then this codes appears as permanent fault..that's why am suspecting .. There is a code A0 below the arrow of the airbag ecu.. My question here is must I get airbag ecu with the code A0 to replace.. And where will I get cheap good one online?

NinoB
1.8 16v
Posts: 98
Joined: Tue Jul 22, 2014 10:39 am

Re: air bag ECU

Post by NinoB » Fri Jun 29, 2018 9:06 pm

All the pretensions are not showing any faults and connections are ok..

User avatar
GingerMagic
3.0 24v
Posts: 3049
Joined: Fri Apr 06, 2012 9:02 pm
Location: Bournemouth

Re: air bag ECU

Post by GingerMagic » Fri Jun 29, 2018 10:21 pm

Is this a new fault, or have you bought the car with this fault already showing...

PP2000 can disable the faulty airbags to stop the light from flashing, but this isn't a fix.
If PP2000 cannot disable the airbag then there is a change the ECU needs replacing.

Sorry I can't help with the numbers.
1999 T4 family wagon
2005 Vauxhall Meriva
1998 406 V6 Coupe - Midlife crisis..!
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

NinoB
1.8 16v
Posts: 98
Joined: Tue Jul 22, 2014 10:39 am

Re: air bag ECU

Post by NinoB » Sat Jun 30, 2018 7:10 am

is a new fault.. i will have to get a new ecu.. any links where i can get reliable used ones?

User avatar
GingerMagic
3.0 24v
Posts: 3049
Joined: Fri Apr 06, 2012 9:02 pm
Location: Bournemouth

Re: air bag ECU

Post by GingerMagic » Sat Jun 30, 2018 7:17 am

Have you given all the connections on the ECU a good clean with a contact cleaner or something - worth a shot.
1999 T4 family wagon
2005 Vauxhall Meriva
1998 406 V6 Coupe - Midlife crisis..!
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

NinoB
1.8 16v
Posts: 98
Joined: Tue Jul 22, 2014 10:39 am

Re: air bag ECU

Post by NinoB » Sun Jul 01, 2018 12:04 am

oh yes i did that..

likewise i saw a new airbag ecu on ebay, and the guy was saying that it was uncoded, so i dunno if i can buy it and fix it without any coding, is that how it works or it requires coding before fixing in the car, any ideas?

User avatar
steve_earwig
Moderator
Posts: 18944
Joined: Thu Oct 04, 2007 6:09 pm
Location: Jastrebarsko, Croatia http://www.jastrebarsko.hr/lokacija/

Re: air bag ECU

Post by steve_earwig » Sun Jul 01, 2018 7:12 am

I'm fairy certain they're not coded but it might need vairous sensors/features/annoyances configured (probably in PP).

How much is it? It might be worth getting for "test by substitution" purposes, you can always sell it on.
Unskilled meddling sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - fuel leaks galore!
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - It's alive!!

NinoB
1.8 16v
Posts: 98
Joined: Tue Jul 22, 2014 10:39 am

Re: air bag ECU

Post by NinoB » Sun Jul 01, 2018 7:33 am

I saw exactly mine as 18 pounds n ships 3 pounds..so I should just buy it..no coding.. I ddnt c any coding location in pp2000..

User avatar
steve_earwig
Moderator
Posts: 18944
Joined: Thu Oct 04, 2007 6:09 pm
Location: Jastrebarsko, Croatia http://www.jastrebarsko.hr/lokacija/

Re: air bag ECU

Post by steve_earwig » Sun Jul 01, 2018 9:11 am

That doesn't sound bad, I'm sure from Pug it would be much more...

Hmm, Service Box is not telling. It does say "part to be configured" though, that could be telling it about sensors, which airbags etc. Perhaps PP has something to say about that?
Unskilled meddling sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - fuel leaks galore!
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - It's alive!!

NinoB
1.8 16v
Posts: 98
Joined: Tue Jul 22, 2014 10:39 am

Re: air bag ECU

Post by NinoB » Sun Jul 01, 2018 9:26 am

so what do you advice.. i should just go ahead and buy it that way?

User avatar
steve_earwig
Moderator
Posts: 18944
Joined: Thu Oct 04, 2007 6:09 pm
Location: Jastrebarsko, Croatia http://www.jastrebarsko.hr/lokacija/

Re: air bag ECU

Post by steve_earwig » Sun Jul 01, 2018 10:42 am

If they're common around that price I'd say do some more research but if they're rare (that is, if that's the only one) then buy it.

I was hoping maybe there was something on the repair manual (there seldom is :( ) but we had a powercut yesterday and, as well as screwing up the router, it seems to have wiped out my SEDRE and Service Box doc back-up programs for both Pug and Citroen, and I can't get the keygen to work on anything, arse. Anyone? Code is ACZXMAAA .
Unskilled meddling sin©e 2007

2004 D9 2.0 HDi 110 Estate lhd VF38ERHZF81657352 - sold but being very well looked after.
1991 Yamaha TDM850 - fuel leaks galore!
2008 Toyota Recall4 2.0 VVTI ATM LHD JTMBH31V90D007261 - flimsy piece of crap.
1953 Matchless G3LS - It's alive!!

Post Reply