Ecu

[Dave rave]

can you help , so I can help with problem can Anyone tell me 2 things , first is if my fob is not working (or no battery in it) and I put key in ignition Will any dash lights come on ( I know it will not start up lol) and second thing is if I took ecu off car , and put key in ignition (not working  but the right key ) would that stop lights coming on dash ,,  

[PeteB]

If the ECU isn't in, nothing works. It has a central communication hub which talks to all of the other ECU units in the car and if that is fried then other things start to go wrong. This hub has broken on mine, csusing, or at least possibly, the messages from other ECU units to fail to get through.