BMW e61 cas problem

[EMCE159]

Hello
I have this car in akl situation. I've read cas3 tango detected as cas3+, so I read also ecu, tango made transponder but car doesn't accept it. Ecu is edc16 so as I thought it should have short isn, but according to tango it has long one. I've read somewhere that this cas3 isn't fully encrypted and in reality it has isn. Can anyone check my dumps and help?
Regards

[fred77]

have you been on tango forum

sure somebody can help here also

[bmujka]

i think your ecu has short isn... 42 E2

[rokibar]

Hello
I have this car in akl situation. I've read cas3 tango detected as cas3+, so I read also ecu, tango made transponder but car doesn't accept it. Ecu is edc16 so as I thought it should have short isn, but according to tango it has long one. I've read somewhere that this cas3 isn't fully encrypted and in reality it has isn. Can anyone check my dumps and help?
Regards

hi emce 159. try this and report please. pass in pm.
cas3+ mod.rar

[bmujka]

So can u share what u did. I understand if u don't want to but did u test this type of mod on other cars

[rokibar]

So can u share what u did. I understand if u don't want to but did u test this type of mod on other cars

Let see what emce will answering.

[EMCE159]

I build harness to ecu and than I was able to do it "by obd" with avdi. After car started I read ISN from key, it was BB D7 FB BB D7 FB BB D7 BB D7 FB BB D7 BB FB BB. But I don't have a clue how to calculate it from my dumps. Thank you rokibar for your help, but I didn't try your solution.

[bmujka]

congrats man. was waiting to see if rokibar mod worked

[rokibar]

.........welcome.......

[droidwayne65]

A couple tricks to making a key for CAS3+ with a two-byte ISN. You can turn off the "3+" flag and the programmer does the rest, since the ISN isn't encrypted. Although, on a couple gas cars, I had to actually mod eeprom further with a ISN string. The other way is to leave eeprom intact as 3+ but feed the programmer a constructed ISN when it asks for it.