ACDELCO E78 JTAG

[damianbm]

Hi! im working with some Acdelco E78 bricked. Im trying to make it working again. i have dumps readed with USB NT with E78CAN. But now after reflashing with other tool i cant make it work again. So im trying to revive this ecu with JTAG but i have some warnings that i can't write it.

When i detect with E78 shows this:

-detect
IDCODE 00000000
-detect
IDCODE 0816601D
MPC5566
onCE JTAG ID 0x00000000
Unknown state possile locked

and when i try to do read or verify all shows 00's.

Can you help me?

[usbbdm]

Your JTAG ID does not look right to me.
Check this video.
https://www.youtube.com/watch?v=lu-uVRUJGmc
There are some setup needed.

[damianbm]

i've double checked connections and steps and all seems ok in connnections- when i press "ID" reads once idcode and next time shows 0000.

There is some way to test interface (usb nt jtag), mean, pin by pin voltage check?

[usbbdm]

You can find me on the chat. (Not the forum).
Any webpage has a small chat box on your right.