Today, we’ll walk through a successful bench operation to unlock, read, and write to the Bosch M7.8 ECU using the ECUHELP KTflash, PCM Tool, and KTprog.

Tools & Equipment Used:
KTflash – For unlocking and IMMO off + checksum correction

PCM Tool – as one J2534 Interface to connect KTflash

KTprog – Used to read and write the data

USB connection cable – To link PCM Tool and KTprog

3A 14V power supply – For stable power to PCM Tool and KTprog

Important: The Bosch M7.8 ECU must be desoldered for proper read/write access.

Step-by-Step Guide: Unlock Bosch M7.8 with KTflash
Step 1: Launch KTflash Software
Open the KTflash software.

Click on the yellow icon in the top right corner.

Insert the KTflash USB dongle into your PC.

Click “USB Dongle Login”.

Your dongle must be authorized with the required protocols.

Step 2: Select Unlock Module
Go to Programmer > Bosch > ME7 Unlock Module.

Moreover, this module supports both IMMO off and checksum correction.

Click on “Wiring Diagram”.

Choose between ME7.8.8 and ME7 depending on your ECU.

Follow the diagram to connect:

1x GND
1x K-Line
2x 12V Power

Connect the PCM Tool accordingly.

Step 3: Unlock the ECU
Click “Unlock” and wait for the process to complete.

If unsuccessful, click “Unlock” again until it completes.

Reading/Writing & IMMO Off
After the ECU is unlocked:

Use KTprog to read the data.

Then use KTflash to apply IMMO off and perform checksum correction.

Finally, use KTprog again to write the modified file back to the ECU.

Conclusion
With the right bench setup and tools, unlocking and modifying Bosch M7.8 ECUs becomes a straightforward process using ECUHELP KTflash. Make sure to follow the wiring diagrams carefully and ensure all devices are properly powered and connected.