OBDSTAR DC706 read and write BYD Delphi MT22.1 Denso ECU on bench successfully.

I’ll walk through my experience reading and cloning aDenso MT 22.1 ECUusing theObdstar DC706tool. This process involves bench reading, VIN writing, and troubleshooting common issues—helpful for locksmiths, mechanics, and automotive enthusiasts.

Step-by-Step Process

1. Connecting to the ECU

• TheDenso MT 22.1 ECUwas initially attempted withXhorseMulti prog, but it required boot mode, which was unnecessary with theObdstar DC706.

• Using aK-line connection, the Obdstar successfully established communication with the ECU.

2. Reading the ECU Data

• The reading process was slow due to the K-line protocol but stable.

• The tool firstwrites a bootloaderbefore extracting the flash data, ensuring compatibility.

• A key advantage of the Obdstar DC706 is its ability toread and write VINs, useful for virgin ECUs or replacements.

3. Handling a Virgin (New) ECU

• The new ECU had no pre-written VIN, so the plan was:

  1. Read and save the flash datafor future use.

  2. Write the correct VINif the original ECU couldn’t be read.

• Avoiding physical opening (desoldering) was preferred to preserve the ECU’s integrity.

4. Troubleshooting and Next Steps

• If the original ECU couldn’t be read via bench mode,boot mode (desoldering)would be the fallback.

• The saved flash data from the new ECU could be reused for future cloning jobs.

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