Mercedes Bus Simulation: Help & Tips

Hello!

I've performed an engine swap on a Mercedes W124 (using a 230 Kompressor engine from a 1999 SLK) and I need to somehow get the speed signal onto the CAN bus and into the engine control unit.

This normally happens via the ABS, which now does not have a CAN bus.
This causes the vehicle to enter emergency mode.

Can someone design a circuit and program a controller for me?

I would, of course, be willing to pay a negotiable fee for that.

I would solder the components together myself.

I would be happy to learn the job myself, but I don't have the time because I have to go to the TÜV (technical inspection) in the next two months.

Best regards,
Andreas

Hello!

I also forgot that I have an ABS control unit, which connects to the engine control unit without any errors.

I had manipulated it using resistors so that I no longer had any error codes in the engine control unit.

Unfortunately, it now thinks the car is stationary, and it's only revving up to 4000 RPM.

Perhaps it will be useful, and someone might need the CAN chip from it.

Best regards,
Andreas

You would need a CAN interface. To use it, you first need the relevant information on how the ABS speed data is transmitted via CAN (ID, cycle time, etc.) and what the engine control unit expects.

Information about ID and cycle time?

I want to use the CANTucan device from B-Plus to generate the signal.


Best regards,
Andreas

I'm not familiar with CANTucan, but you need to get the signals from the ABS to the engine control unit.

The ABS transmits the signals with an ID, a cycle time, etc., and because the wheel and vehicle speeds are safety-critical, the signals are protected with a checksum.

The engine control unit needs these signals, but it likely expects them with a different ID, cycle time, etc. A CAN converter reads the messages from the ABS control unit on one side and then outputs them in a format that is suitable for the engine control unit. To configure this properly, you first need to know how the signals are being transmitted.