OBDSTAR DC706 Recover GM E78 ECM in Boot Mode

 Both OBDSTAR DC706 and I/O Terminal will recover many GM ACDelco ECMs with shadow password in boot mode (check previous post).

Here is another user review on GM E78 ECM recovery using DC706.

 

Importance of Reading ShadowFlash in DC706:
When reading some ECUs with the DC706, the equipment gives us the option to read ShadowFlash.
Recently, while trying to clone an E78 ECU from a Silverado, the module became useless after attempting to bench write it. The writing was not possible and ECU stopped communicating by OBD (appear the code p0606 (code referring to the processor)).
However, DC706 offers us the option of writing by boot, but when trying to connect, the team requests a password. This password can be obtained by reading the ShadowFlash earlier.
Thanks to this function, it was possible to recover the ECM and avoid its loss.

 

Just to be clear, the option to read shadow flash does not appear in the boot menu, it is obtained by bench. If you open the delco e78/bench menu you will find the option of shadow flash.

Attached are photos of the boot mode progress.