Xprog-M ECU Box read Mercedes EZS 9S12 & 912 Tutorial

Xprog-M Box ECU programming is 100% working on Mercedes EZS with 912 and 9S12 processors. Here are the detail instructions on reading Mercedes-Benz EZS Motorola 912 or 9s12 CPU EEPROM in-circuit using Xprog (V5.0, V5.48, V5.50, V5.55).
Mercedes-Benz EZS Motorola 912 or 9s12 CPU EEPROM

Almost all control points joined with service connector of EZS – black painted connector. You can buy a X-Prog m 9S12 EIS Reading Cable off ebay. With this cable you will be able to read the EEprom files from the Mercedes EIS (All Mercedes cars which they use 912 or 9S12 processors) within less than 2 minutes. No need to desolder the MCU from the board.
Mercedes-Benz EZS Motorola 912 or 9s12 CPU EEPROM

Use the following wiring connection diagram:

1 – EXTAL

2 – GND

3 – RESET

4 – BKGD

The EXTAL signal doesn’t joint to service connector, so we have to make jump according to CPU type.

II. To read Mercedes Benz EZS 912 with X-prog

If you see on board
read Mercedes Benz EZS 912 with X-prog
It means you have 912 CPU. Do make a jump like in picture (you can keep this jump even after reading/writing finishing).
read Mercedes Benz EZS 912 with X-prog
Find resistor on RESET line and make a jump on it for good communication. (you can keep this jump even after reading/writing finishing).
read Mercedes Benz EZS 912 with X-prog
Then solder red wire of the EIS cable for power supplying.
read Mercedes Benz EZS 912 with X-prog
Now plug in the connector to X-prog programmer board like in picture:
read Mercedes Benz EZS 912 with X-prog
We recommend to mount the part of cover on to the EZS, then you have not a mistake while you connect cable to EZS.
read Mercedes Benz EZS 912 with X-prog
Start the Xprog programmer software and press DEVICE button.
read Mercedes Benz EZS 912 with X-prog
Choose the following, MCU type etc:
read Mercedes Benz EZS 912 with X-prog
Press “New” button, then “Read” button
read Mercedes Benz EZS 912 with X-prog
Reading in progress
Display EEPROM data
read Mercedes Benz EZS 912 with X-prog
Save EEPROM file you have read.
read Mercedes Benz EZS 912 with X-prog

II. To read Mercedes Benz EZS 9S12 with X-prog

If you see on the board
read Mercedes Benz EZS 9S12 with X-prog
It means you have 9S12 CPU. Do make only one jump like in picture
read Mercedes Benz EZS 9S12 with X-prog

Then solder red wire of the cable for power supplying.
read Mercedes Benz EZS 9S12 with X-prog
Then do the same job like with previous CPU type but remember about a difference when you choose microchip in programmer software.
read Mercedes Benz EZS 9S12 with X-prog
Sometimes new board types with 9S12 CPU have not some jumps (it has zero resistance as usual). Make the- se jumps yourself.
read Mercedes Benz EZS 9S12 with X-prog read Mercedes Benz EZS 9S12 with X-prog

You can keep these jumps after reading/writing, too.

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