Hello mates,

I've succesfully decrypted another CEM L on bench. Make a clone with ioterminal.

When i plug the new CEM the odometer does not work. The car starts but non odometer.

Any ideas ?

Hello the forum,
Sorry for the late for upadting my posts.

I have sucessfully read the pin on the bench, I've changed the can module, maybe the old one was dead.

To resume :
On the CEM
PIN 8 15 & 16 on +12v
PIN 6 on ground (same as the ground on teensy)
PIN 33 & 48 on CAN HS
PIN 40 & 55 on ...

No way it can't work on the bench. I spent long months with CEM-L on the bench, hundreds of runs.


So i will make it on car, thanks for the advice. 👍

I said it works on the bench. I ran it once, maybe twice on a real car :) Remove autodetect line, compile/upload, wait for the message ...

No way it can't work on the bench. I spent long months with CEM-L on the bench, hundreds of runs.


So i will make it on car, thanks for the advice. 👍

I said it works on the bench. I ran it once, maybe twice on a real car :) Remove autodetect line, compile/upload, wait for the message ...

vtl wrote: 21 Jan 2026, 14:34

vtl wrote: 21 Jan 2026, 13:22 Can it read part number now? Power up Teensy, wait for message, power up CEM within 5 seconds.

No way it can't work on the bench. I spent long months with CEM-L on the bench, hundreds of runs.

So i will make it on car, thanks for the advice.

Already done no change

I think there is something wrong with the pin on CEM.

I do not have the "Putting all ECUs into programming mode" message on display or monitor in arduino.

Here's the arduino monitor.

Thanks

Hi everybody,

What a great work on the CEM CRACKER,

I have a VOLVO S60 2.4D 2005 with a CEM L part number 30765646. Car won't start with multiple electronic issues.

Unfortunately, I have always same issue when launching CEM CRACKER on bench. Did someone try it on bench ?

PINOUT :
PIN BA BB ...