Circuit/System Description
WARNING: This page is about a different car, the 2017 GMC Sierra 1500 and 2017 Chevrolet Silverado 1500. However, it is still accessible from the selected car via links, so may be relevant.
The generator control module also called the starter/generator control module is comprised of the following three control modules; the hybrid/EV powertrain control module 1, 14 V power module and the drive motor control module. These three control modules are non serviceable and are part of the generator control module.
The 14 V power module has 1 current sensor for input current measurements. This diagnostic checks the input current sensor. The current sensor is internal to the 14 V power module and is not serviced separately from the generator control module.