The RX8 cluster is primarily controlled through the CAN bus and listens for other modules broadcasting speed, rpm, temps, error codes, etc. Since the ECU will no longer be on the bus broadcasting these parameters (and there is no ICE engine to get sensor inputs from) I will have to send the appropriate CAN messages myself.
So far I have the following functions figured out:
- Water Temp
- Oil Pressure
- Traction Control MIL light
- Brake Failure MIL light
The images below show when the bus is quiet after the ICE controller has been removed (first image), and when I am sending it fake bus messages to control the cluster (last image).