Chip-Tools

ITDEEN

Renewing an already adapted 722.9 (7G) transmission control unit

A special function to renew 722.9 transmission control units already adapted to another car, so they can be reused on a different vehicle. The 7-speed units (722.9) can be renewed either on the vehicle or off the car, on the bench.

Procedure

1. If you are working off the car, on the bench, connect only the CAN pins plus GND and +12V to the 7-speed unit. 7G unit pinout: Pin1 CAN-H, Pin2 CAN-L, Pin4 +12V, Pin5 GND.
2. Select the vehicle and connect to the Electronic Transmission Control unit.
3. Mercedes Diagnostics displays the control unit identification.
4. Pressing the "Adaptation" button shows the available adaptations, including the SCN coding string: you can save the SCN string from a damaged unit and then write it into the donor 722.9 unit.
5. Press the "Make Virgin" button: the screen with the recommendations appears (battery charger connected, diagnostic connector properly seated, laptop on mains power, screen saver and antivirus disabled).
6. On first run the software asks for the location of the 7G renew database files: browse to the folder where you extracted these files and select it.
7. A progress bar appears with the time and percentage completed: wait for the procedure to finish without interrupting it.
8. Once the procedure is complete, check the "Actual Values" and confirm that the Electronic Transmission Control unit reports itself as renewed.
9. Fit the 722.9 to the car you want to adapt it to, reconnect to the unit and press the "Adaptations" button.
10. Press the "Get Coding" button, then for the "Detach the transport protection, personalize and activate the control unit" option select "Yes" and press the "Set Coding" button.
11. Go back and check the actual values: if everything is in order the 7G unit shows as personalized and you should be able to see the key hashes.
12. If the old unit is available, read its SCN coding and write it into the donor unit.
13. Note: using the DAS Manager for module renew is strongly recommended.

Reference screenshots