Airbag fault (D9 semi-mux)

[steve_earwig]

Does it bring the light up if you set the whole lot to absent? I bluddy hate having airbags

Wire cods:

650 : Driver's pre-tensioning seat-belt + command
651 : Driver's pre-tensioning seat-belt - command
652 : Passenger pre-tensioning seat-belt + command
653 : Passenger pre-tensioning seat-belt - command
654 : seat belt fastened warning lamp control /
655 : driver's pretensioning seat belt and strap return control +
656 : driver's pretensioning seat belt and strap return control -


6500 : Driver's air bag 2 control 2
6501 : Driver's air bag 2 control 2
6502 : Passenger's air bag 1 control 1
6503 : Passenger's air bag 1 control 1
6504 : Passenger's air bag 2 control 2
6505 : Passenger's air bag 2 control 2
6506 : Driver's side airbag + command
6507 : Driver's side airbag - command
6508 : Passenger side airbag + command
6509 : Passenger side airbag - command
6510 : 1C Airbag 1C info
6511 : 1C Airbag 1C info
6512 : Driver's knee airbag + command (these might not actually be all on the diagram but I got fed up going back and forth)

6542 : front air bags warning lamp control /
6544 : side air bags warning lamp control /
6546 : Passenger airbag neutralisation switch info
6547 : Passenger airbag neutralisation command

6708 : Bridging solenoid valve command eh? It's 6508 the other end, spot the cock-up

[Doggy]

Thanks for all your input gents. The car and it's owner have gone off to bemoan the impossibility of the situation to all who will listen, (and a few that put up a spirited fight), while yours truly tries to figure out how this became MY problem.

Next thrilling episode at the weekend, weather permitting. Just this, a number plate light and a drop link to do - what could possibly go wrong.

[Doggy]

Well, it's sorted.

In the end I cured it by unplugging/re-plugging the multipole connector at the airbag/pretensioner ecu under the centre console. What a joyous experience that is - you have to dismount the ecu to undo the plug, because it's too sodding close to the handbrake lever to fully separate.

It still only talks to one of the two side airbag ecu's, and the one that responds reports an open-circuit warning light....

Decided that can of worms could wait.

FWIW it doesn't look like you can disable any or all of the system on a semi-mux

Thank's everyone for the info and suggestions, much appreciated.