MoTeC Global Forum

I have the address etc of the factory CAN data coming from the Bosch ABS module.
It is the 4 wheel speeds(divide by 16 to get km/hr) and noting else on this message.
Is it possible to use them for traction control without having to connect another piece of equipment etc?

You won't be able to receive the messages directly into a hundred series ECU. You will need another device (such as a dash) to receive the messages, reformat and scale them and then send them to the ECU.

Is there any information on the CAN data for MDD/Wheel receive?

I have found a CAN to CAN gateway that I can program to give the required data set in and out.

The hundred series ECUs receive compound messages, below is an image showing how the message needs to be formatted


The first two bytes are the compound ID and the ADL1 to ADL12 are all 16bit channels. The CAN address is configured in the Mx00 software and can be any standard 11bit address.

In the input for the wheel speeds you use ADLx as your sensor source.

The factory CAN is only 11 byte.

Are any of the M800 receive data sets only a single 11 bit address?

The (old) Bosch module sends 4x 12 bit channels(padded to 16 bit) over a single 11 byte CAN message.

The table above shows the only way you can receive custom CAN messages into a M800.

If I only send 2 of the 4 messages, i.e. offset 0x0000 and 0x0100, will the M800 throw an error for not getting the rest?

No it won't give you an error, you can send just one of the messages if you want.