Circuit/System Description
WARNING: This page is about a different car, the 2012 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
When the vehicle is in the Service Mode, the hybrid powertrain control module 2 supplies a 5 V signal to the charge door position sensor through the charge port door position sensor signal circuit. The charge port door ajar switch contains a resistor ladder interface for switch position between two resistors for sensing used by the hybrid powertrain control module 2 to determine if the charge port door is in the open position or the closed position.