hey guys just a question since this is the same subject i have been confused on, but here is a picture of my ecu, this is later VOLVO, im assuming me 7.5 by design, earlier me7 i can achieve bootmode by just grounding out the proper pin, but this particular ECU with infineon chip and updated design i had some trouble with at first
i tested with two junkyard spares to be sure, they are cheapo for these.. upon grounding out the boot pin, the ECU partially fried
....it will start the vehicle, but will never go into bootmode. ever again, so i switched to a 2k ohm resistor, and have never had the issue with bootmode.
has this happened with anyone with audi/VW?
Hi Steve, I reckon that you must have shorted a pin somewhere there. All the resistor is doing is dropping the voltage/current down to chip survivable levels, this leads me to believe that you had a short. Possibly 12v to the bootpin?