Circuit/System Description
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
The high side driver 1 is internal to the Hybrid/EV powertrain Control Module 1. With the ignition On, the high side driver 1 provides 12 V to the transmission control solenoid valve and line pressure control solenoid. If excessive current flow is detected in high side driver 1 circuit, the high side driver 1 will turn Off. When the circuit fault is corrected, the high side driver 1 will reset. The hybrid/EV powertrain control module 1 and both drive motor control modules are internal to the power inverter module, often referred to as the drive motor generator power inverter module, and not serviced separately.