What is the sequence of the steps when disconnecting the Engine ECU.
I am sending my ECU away for de-coding and I would like to know what is the sequence of the steps I need to follow before I disconnect the Engine ECU.
1) Do I just disconnect it?
2) Do I disconnect the battery first (negative terminal first and then the positive one) and then the ECU (after about 10 minutes)?
3) Do I disconnect the battery first (as above) and then the code reader and then the Engine ECU?