Circuit Description
WARNING: This page is about a different car, the 2003 Oldsmobile Aurora and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) receives two ignition inputs from the ignition switch. IGN 0 and IGN 1. The PCM receives the CRANK REQUEST input with the ignition switch in the START position. The PCM uses a class 2 ignition mode message, and the voltage input from 2 separate systems to test the CRANK REQUEST circuit. If the PCM detects an improper input, DTC P0512 will set.