Vida CEM swapping

oscilloscope · Post by **oscilloscope** » 08 Mar 2023, 07:22

dikidera wrote: 08 Mar 2023, 06:44 Which would be the immobilizer key, yes? So I need to dump my CEM, the EEPROM? Copy that key to the ECU? I probably generalized the steps, but I am not sure what the steps are.

let me guess is it saying somthing along the lines of IMMOBILISER TRY START AGAIN or are you looking to find out how the process is performed ?

if so you probably best reverse engineering the old software which is floating around the internet which codecard.eu supplied some years ago

dikidera · Post by **dikidera** » 08 Mar 2023, 12:00

Actually no, I have not powered on the ECU yet, but I imagine it needs to be re-programmed later on.

coormis · Post by **coormis** » 10 Mar 2023, 05:56

vtl wrote: 24 Jan 2023, 08:09
coormis wrote: 24 Jan 2023, 08:03 hello, i try crack volvo xc90 2014 cem pin, but pin not cracked. hardware: teensy4, SN65HVD230, lm2596 dc-dc. attach log.log 01.24 not cracked.txt
can anybody help?

Thanks
Mind sharing pictures of your hardware?

photo

coormis · Post by **coormis** » 10 Mar 2023, 06:00

vtl wrote: 24 Jan 2023, 08:09
coormis wrote: 24 Jan 2023, 08:03 hello, i try crack volvo xc90 2014 cem pin, but pin not cracked. hardware: teensy4, SN65HVD230, lm2596 dc-dc. attach log.log 01.24 not cracked.txt
can anybody help?

Thanks
Mind sharing pictures of your hardware?

oscilloscope · Post by **oscilloscope** » 10 Mar 2023, 06:44

coormis wrote: 10 Mar 2023, 05:56
vtl wrote: 24 Jan 2023, 08:09
coormis wrote: 24 Jan 2023, 08:03 hello, i try crack volvo xc90 2014 cem pin, but pin not cracked. hardware: teensy4, SN65HVD230, lm2596 dc-dc. attach log.log 01.24 not cracked.txt
can anybody help?

Thanks
Mind sharing pictures of your hardware?
photo
8ED72F43-4178-44B8-AF8F-AD19891B8589.jpeg

What cem unit do you have ?

coormis · Post by **coormis** » 10 Mar 2023, 06:55

31394158

Post by **vtl** » 10 Mar 2023, 07:10

coormis wrote: 10 Mar 2023, 05:56 photo
8ED72F43-4178-44B8-AF8F-AD19891B8589.jpeg

Did you solder CAN bus to termination resistor jumper?

coormis · Post by **coormis** » 10 Mar 2023, 08:48

vtl wrote: 10 Mar 2023, 07:10
coormis wrote: 10 Mar 2023, 05:56 photo
8ED72F43-4178-44B8-AF8F-AD19891B8589.jpeg
Did you solder CAN bus to termination resistor jumper?

Are you talking about the 120 ohm resistor on the SN65HVD230?

Post by **vtl** » 10 Mar 2023, 08:52

coormis wrote: 10 Mar 2023, 08:48 Are you talking about the 120 ohm resistor on the SN65HVD230?

This 2-pin yellow jumper on your CAN shield that you've soldered to OBD-II connector - what is it for? IIRC in my shield it connects 120 Ohm resistor (terminates the CAN bus). I can't check my hw right now.

Post by **vtl** » 10 Mar 2023, 08:53

coormis wrote: 10 Mar 2023, 08:48 Are you talking about the 120 ohm resistor on the SN65HVD230?

By the way, the latency numbers in your log are totally off, they make no sense. That's why I suspected the hw implementation.