Failure Conditions
WARNING: This page is about a different car, the 1992 Oldsmobile Custom Cruiser, 1992 Chevrolet Caprice, and 1992 Buick Roadmaster. However, it is still accessible from the selected car via links, so may be relevant.
Code 31 will set if voltage at SENSE LOW input is within a specific range of 36VLR output voltage for 500 milliseconds.