Hi Ian, Fixed one of these about 3 weeks ago with an "immobiliser" problem. In this case the engine would not crank but would run if the starter motor was kicked in with a wire link. The problem was due to water ingress in the ZKE IV unit, it seems the EWS signals go through it in some way. You've probably opened and checked all the modules under there anyway but thought I'd say just in case. Shaun.