Circuit Description

The automatic transmission control system in AW30-40LS uses high speed CAN bus system. The individual CAN bus systems are connected via two interfaces and can exchange information and data. This allows control modules that are connected to different CAN bus systems to communicate. Transmission control modules in the vehicle that require continuous, rapid communication are connected to the high speed CAN bus. The automatic transmission is continuously notified of the current engine load status. Since the automatic transmission control module has to react immediately to load status changes, rapid communication is required between the engine control module and the automatic transmission control module. The high speed CAN bus in the AW30-40LS is designed as a two-wire CAN bus (twisted pair). The wires are shielded and twisted. The transmission rate is 500K band.