By the asynchronous mode each sensor is connected to the ECU by two wires.
The data transmission is unidirectional and asynchronous.
After switching on the power supply, the sensor starts transmitting data to
the ECU periodically. Timing and repetition rate of the data transmission are
controlled by the sensor.
If you wish to run the Simulyzer in the asynchronous mode, you have to make sure that all connections are correct and the Simulyzer software is set on this operating mode.