SYSTEM / Control System MC, ECM and Monitor Unit are used for various op- eration controls of the body. The analog input signals from the sensors and switches attached to devices other than the engine and monitor unit as well as the analog output signals from the solenoid valves are transmitted to MC, and converted into the digital signals to be uploaded on CAN. The analog input signals from the sensors attached to the engine are transmitted to ECM, and converted into the digital signals to be uploaded on CAN.
The analog input signals from the cab, and the analog input signals from the sensors and switches necessary for indication of the monitor are trans- mitted to the monitor unit, and converted into the digital signals to be uploaded on CAN. Each controller detects lacking information necessary for the control program from the CAN data. (digital signals) Each controller makes various control program arith- metic operations by using the detected data (digital signals), outputs the actuation signals to the solenoid valves unit and torque control solenoid valve, and controls the pump, engine, transmission and valves.
The analog signals from various sensors, switches and solenoid valves are periodically transmitted to each controller, and converted into the digital signals to be uploaded on CAN. By repeating the above operations, the vehicle body movement is watched and controlled. T2-1-2