CAN Bus Communication

CAN Bus Communication







The E46 utilizes the now familiar "twisted pair" CAN bus wiring configuration for drivetrain and instrument cluster communication interface. The MS 42.0 to GS 20 link is a dedicated CAN circuit. The MS 42.0 is the gateway for data exchange between the GS 20 and Mark 20 El (traction control) and the Instrument cluster.

CAN bus data exchange for the GS 20 includes:
- Engine Speed (input),
- Engine Temperature (input),
- Accelerator pedal position and rate of application (input),
- Engine intervention signalling (input and output)
- Shift delay for traction control and warm up phase (input)
- Active shift program (output)
- Cruise control requirements (input)
- Turn recognition (input)
- Current Range and program selection (output)
- Torque Converter lock up signalling (output)
- Transmission fault indication lamp (output) etc.