PZM Input Codes
WARNING: This page is about a different car, the 1996 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
PZM input selection provides testing of inputs to PZM. Input status is shown on display as HI or LO. Input test status is shown as "0" until PZM sees a transition in state of switch; status then changes from "0" to "X", indicating test has been passed.