Conditions for Setting the DTC
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
During key ON test, the ECM detects a high signal voltage on the generator turn on signal circuit for at least 5 seconds.
During the RUN test, the ECM detects a low signal voltage on the generator turn on signal circuit for at least 10 seconds.