Chip-Tools

ITDEENBGES

Reading and cloning modules with MC9S12 xExxx using the ZN086 adapter

With the ZN086 you can read PFlash, DFlash and EEPROM data from unlocked MC9S12 xExxx-series processors, save them and write them into another module: in practice you clone the donor module onto a new or used one and adapt it to the vehicle. The MC9S12 is found on modules such as the DSM and ISM in Mercedes-Benz FBS4 vehicles.

Procedure

1. Identify the MC9S12 processor on the module and confirm it is xExxx series and not locked.
2. Find the datasheet for that specific processor and locate the RST (reset) leg.
3. Lift the RST leg off the board pad with the utmost care.
4. Solder the ZN086 adapter to the four points provided on the board, one of which is the lifted RST pin itself, respecting the DB25 pinout: PIN 14 GND black wire 0.25, PIN 21 +5V red wire 0.25, PIN 11 RST yellow wire 0.11, PIN 19 BKGD green wire 0.14.
5. Connect the ZN086 to the ABPROG, the ABPROG to the AVDI and the AVDI to the laptop.
6. Start the software (the Upgraded version of ABProg is normally used, but the job can also be done with Classic), click "MCU" on the main screen and find the MC9S12 options.
7. Read PFlash and EEPROM from the donor module and save the files to the PC.
8. Prepare the replacement module the same way (RST pin lifted and ZN086 soldered) and write the files read from the donor into it.
9. Refit the cloned module to the vehicle and check that it works.

Reference screenshots