The MTLT335 is configured in Autobaud mode by default where the part listens for valid CAN traffic, matches the baud rate on the bus and then begins transmitting.

For the other set of IMUs that transmit once powered, at least one of those devices has autobaud turned off.
Details of how to enable/disable autobaud mode are given in section 5.1.5.7 of the user manual.

Please check your email to ensure you have received the binaries.
Best regards,
Stephen

Hi James,
we can provide the original binaries but unfortunately will have to wait until the manufacturing team is back from new year holidays in China.
If just the application needs to overwritten you can try the procedure shown in the attached application note.
Regards,
Stephen
Recovering an OpenIMU Application Note Rev0.pdf

Hi Valerio,
the magnetometer reads values from -8 to +8 Gauss. The raw value (which will be between -32768 to +32768 counts) from the sensor is scaled to a floating point value where -1 represents -8 Gauss and +1 represents +8 Gauss.
Values outside +-8 Gauss will cause the scaled sensor value to saturate at +-1.