Xprog-M Read Mercedes EZS Motorola 912 or 9s12 EEPROM

Here is the detail instruction on reading Mercedes-Benz EZS Motorola 912 or 9s12 CPU EEPROM in-circuit with X-prog M ECU programming tool (xprog V5.0, V5.3, V5.50, V5.55).

Note: you can also use other programmers, like Rosfar, ETL etc.

To read Mercedes EZS 912 CPU EEPROM

Mercedes-Benz EZS Motorola 912 or 9s12 CPU

Almost all control points joined with service connector of EZS – black painted connector. We offer connection cable for EZS reading with X-Prog programmer:

You can make yourself cable for connection with other programmers.

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. If you see on board

It means you have 912 CPU. Do make a jump like in picture (you can keep this jump even after reading/writing finishing).

Find resistor on RESET line and make a jump on it for good communication. (you can keep this jump even after reading/writing finishing).

Then solder red wire of our cable for power supplying.

Now plug in the connector to Xprog-M ECU programmer board like in picture:

We recommend to mount the part of cover on to the EZS, then you have not a mistake while you connect cable to EZS.

Open Xprog software and press “Device” tab.

Choose the EEPROM Type, 1,2,3 in following

Press “New” button, then press “Read” button to read eeprom

Reading device

You will see the eeprom data

Save EEPROM file you have read

To read Mercedes EZS 9S12 CPU EEPROM

If you see on the board

It means you have 9S12 CPU. Do make only one jump like in picture

Then solder red wire of our cable for power supplying.

Then do the same job like with previous CPU type but remember about a difference when you choose microchip in Xprog programmer software.

Sometimes new board types with 9S12 CPU have not some jumps (it has zero resistance as usual). Make the- se jumps yourself.

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