mercedes W203 ezs all keys disabled

[Nik Matsa]

I tried and I had no response from ezs when:
I inserted the key in ezs
I pressed any button of two different keys
I connected star, I can't run diagnosis
I have noticed something else too, when I had connected an ezs from an other car, the central locking worked from the car's button, but when I connected the ezs of the car with corrected data centeral locking didn't worked
I think the second mcu has the problem, not the one with data keys which I have read. I wan't to check the flash of that mcus.
As I understand flash memory is different in two occasions:
1) a 4j74y which is on the front side of the ezs has different flash from a 4j74y which is on the back side
2) a 4j74y which is on the front side of the ezs has diefferent flash from 2j74y which is on front side of an other ezs

If two same mcus (2 x 2j74y or 2 x 4j74y) are on the same side of two different ezs',
then these mcus has the same flash memory?
That flash memory is standard for those chips when used in mercedes ezs?
If yes, does anyone has the default flash data to send me so I can check if mcus are corrupted?

Thanks for any help in advance

[pepi]

On otocoupler side is memory with km data stored and on the other side is key data .
and your question was
"If two same mcus (2 x 2j74y or 2 x 4j74y) are on the same side of two different ezs',
then these mcus has the same flash memory?"
Yes if there is the same part number.

[LEORNARD NKATA]

Just EEprom data don?t work if mcu is from diferent position (pcb side). Easy solution is use mcu from same position and write just eeprom you can use 1J35d.

please help me i have a w203 all keys disabled situation

thanks in advance

[droidwayne65]

please help me i have a w203 all keys disabled situation

thanks in advance

Everything but the SSID can be fixed. Four bytes of "FF". Do you have any key that was used with this EIS?

[droidwayne65]

Here you go. Four keys had been used and all are now enabled but the bin has a screwed SSID.

[LEORNARD NKATA]

Here you go. Four keys had been used and all are now enabled but the bin has a screwed SSID.

ssid is 98 57 55 17 this is the key that was in the car

[droidwayne65]

ssid is 98 57 55 17 this is the key that was in the car

I assume Key0?

[LEORNARD NKATA]

I assume Key0?

let me write file to eis make new key and try start the car thanx for the support

[LEORNARD NKATA]

let me write file to eis make new key and try start the car thanx for the support

i tried starting the car but no lucky maybe i gave wrong ssid

[droidwayne65]

i tried starting the car but no lucky maybe i gave wrong ssid

Did the ESL unlock and key turn?

[LEORNARD NKATA]

Did the ESL unlock and key turn?

no it didnt unlock and ignition is not turning

[droidwayne65]

no it didnt unlock and ignition is not turning

Do you have the tools to unlock a ESL or an ESL emulator? Test off the car with the emulator or on the car with the ESL unlocked. If the key doesn't turn then either the EIS or key is bad. If that's the case, it gets interesting .
Try making another key for this EIS and test again.
If no good, get another, good EIS, save it's original eeprom data, clone your original data and test again with the key you previously made.
If the key turns, you're set. If not, then you have to rewrite the saved eeprom data and make a key from it, the ESL has to be unlocked, the ECU has to be unlocked and reinitialized after the EIS and ESL are working normally.

[LEORNARD NKATA]

Do you have the tools to unlock a ESL or an ESL emulator? Test off the car with the emulator or on the car with the ESL unlocked. If the key doesn't turn then either the EIS or key is bad. If that's the case, it gets interesting .
Try making another key for this EIS and test again.
If no good, get another, good EIS, save it's original eeprom data, clone your original data and test again with the key you previously made.
If the key turns, you're set. If not, then you have to rewrite the saved eeprom data and make a key from it, the ESL has to be unlocked, the ECU has to be unlocked and reinitialized after the EIS and ESL are working normally.

i tried writing the new file on another ezs but still nothing but if i take a different ezs and connect to the car it will write computing data on dash
what could be the problem ?
maybe the ssid i provided was wrong and in that case how do i get a proper ssid

[droidwayne65]

i tried writing the new file on another ezs but still nothing but if i take a different ezs and connect to the car it will write computing data on dash
what could be the problem ?
maybe the ssid i provided was wrong and in that case how do i get a proper ssid

Well it's time for the second option. Use the new EIS, unlock ECU and ESL.

[leaserhu]

Try my file an d collect!