Generator Shut Down (GSDN)

The PCM keeps the generator motor inverter enabled by continuously toggling the GSDN output. Typical output frequency varies between 49 and 75 Hz at 50% duty cycle. The PCM also broadcasts a redundant not shutdown message to the TCM over the communication link. When a concern condition is detected, the PCM stops generating this frequency signal and broadcasts a shutdown message to the TCM over the communication link. The TCM then disables the generator motor inverter and sets an appropriate DTC. In the event of GSDN circuit failure, the PCM still broadcasts a not shutdown message but the hard wire signal frequency is out of expected range. The TCM then disables the generator motor inverter and sets the appropriate DTC.