I've heard of this one before, but never seen it, so not sure where to go.
A member popped round this evening as he'd been unable to attend the Nano, and is quite close. He has an airbag lamp on the dash. One seat had been hard wired, the other he gave the connectors a quick disconnect / reconnect as suggested. This hadn't worked, so the idea was a T4 to find where the problem was.
Problem is, the T4 couldn't talk to the airbag. Checked the fuse and its intact, power both sides. The diagnostic connection in the car is OK, autobox and engine (V6)were both 'contactable' and share the same diagnostic line.
Reportedly, the car had been stood before the sale, and the light had been out before. Indeed it has a recent MOT. However the battery went flat, and when recharged before sale, the light was on.
It sounds unfortunately like the airbag ECU (Engine Control Unit) might be the problem, I can't think what else. Yes it could be the power or ground connections at the airbag ECU, but why would the battery going flat cause that?
So any suggestions to help this chap? Anyone replaced an airbag ECU with a used one? I'm hoping David will see this and have some comments.