Winco DGC-500 - Manual (Page 48)

DGC-500 Functional Description 3-28
Figure 3-18. Ready State Diagram
Figure 3-19. Pulsing State Diagram
Pulsing State
The Pulsing State follows the sequence of events shown in Figure 3-19. The Pulsing state will momentarily
power up the ECU to update the DGC-500 internal variables. Once a connection is established with the ECU,
GATHERING DATA will appear on the LCD for the duration of the settling time. During settling time, the unit
processes any previous request for clearing DTCs from the ECU. The Pulsing state always transitions to the
Ready state unless the System configuration changes to Run/Auto-Run. Then, it will transition to the
Connecting state as a result of pulsing and will follow the ECU Power Support diagram.
Connecting State
The Connecting State follows the sequence of events shown in Figure 3-20. If ECU communication is not
established by the time the Response Timeout expires, then the ECU Communications Failure Flag is set to
trigger the Alarm state. The Connecting state will power up the ECU. Once it reads the engine speed, it
checks if it is above Crank-Disconnect. If it is, then it will go to the Running state. Otherwise, it will go to the
Pre-Start state.