Circuit/System Description
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
The K20 Engine Control Module controls the G13 Generator through the control circuit 25, also known as the generator L-terminal. The K20 Engine Control Module monitors the G13 Generator performance though the signal circuit 23, also known as the generator F-terminal. The control circuit 25 is a PWM signal of 128 Hz with a duty cycle of 0 - 100%. Normal duty cycle is between 5 - 95%. 0 - 5% and 95 - 100% are for diagnostic purposes, with 0 - 5% monitoring for an open circuit and 95 - 100% monitoring for a short to ground.