Thread: 2002 Defender TD5/10AS Hell

Originally Posted by shack

It's unusual that the original de-immobilized ECU now won't run, does it need a functioning BCU to start?

I've not really messed with the defender one, but I'm considering retro fitting a D2 one

Originally Posted by shack

Yeah ok, that makes perfect sense.

Been there done that modding stuff as well!

If that's the case it's possible the AS10 has died and that's why it won't sync.

And the original ECU won't work as it's physically damaged.

All adds up now.

So you want to the inmo off on the new one?

What revision ECU is it?

I'll check if you mentioned it earlier..

They are both NNN000120s. I’m going to ultimately Immo off both. I’m going to try the MEMS kline approach on the newer one. For the duff one will desolder and put a pre programmed chip on. Where I will program with an arduino.

Will ultimately write up a clear how to. As I have only found bitsy posts etc.

So it was immobilising… turns out the ECU won’t fire the injectors if immobilised. I took my new ECU and used the excellent mems3 app to set the immo off. I must have buggered up the EEPROM on my original ECU. Will reprogram and solder in a fresh one…