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OBDSTAR DC706 Recover GM ACDELCO E78 ECM by Shadow Password

已有 30 次阅读2025-2-6 20:44 分享到微信

Both OBDSTAR DC706 ECU Tool and I/O Terminal are capable of recovering various GM ACDELCO ECMs with shadow passwords in boot mode.

Here’s a user review on successfully recovering a GM E78 ECM using the DC706:

Importance of Reading ShadowFlash with DC706:

When using the DC706 to read certain ECUs, the tool provides an option to read ShadowFlash.

In a recent case, while attempting to clone an E78 ECU from a Silverado, the module became inoperative after a failed bench writing attempt. The ECU stopped communicating via OBD and displayed the error code P0606 (Processor Fault).

Fortunately, OBDSTAR DC706 offers the option to write in boot mode. However, during the process, the tool requests a password, which can only be obtained by reading ShadowFlash beforehand.

Thanks to the ShadowFlash reading function, the ECM was successfully recovered, preventing permanent damage.

Key Note:

The ShadowFlash reading option does not appear in the boot menu; it must be accessed via the Bench Mode Menu. Open the Delco E78/Bench Menu, and you will find the ShadowFlash option.