Have you cleared all codes? Is it a new or old code?
probs the base sensor in the seat, think its to do with the connector to the seat harness
Anything else not work ? ie horn
Rare for the airbag to throw up issues
Ye, IMO the airbag module is at fault
Try with this http://www.ebay.co.uk/itm/LANDROVER...S-0-25W-2-AMP-FUSED-FAULT-LIGHT-/261532676291 if the light goes away with it you know it's the airbag at fault
Don't mess with multimeter in the air bag's plug cos it sends voltage for continuity and it's dangerous... it should have a shorting pin in the plug exactly to avoid that