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.
A high voltage interlock circuit is used to determine if access to high voltage components or connectors is being attempted. The opening of these high voltage components causes the high voltage interlock circuit to open. The hybrid/EV powertrain control module 2 sources about 5 V on the high voltage interlock circuit 1 loop. When the hybrid/EV powertrain control module 2 detects a loss of high voltage interlock circuit current, the high voltage contactors are commanded open.
The high voltage interlock circuit monitors for integrity of the S15 Manual Service Disconnect.