Conditions For Setting DTC
WARNING: This page is about a different car, the 2003 Cadillac Seville, 2003 Cadillac DeVille, 2002 Cadillac Seville, and 2002 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
During the key ON test, the PCM detects a high signal voltage on the generator turn on signal circuit for at least 5 seconds, or during the RUN test, the PCM detects a low signal voltage on the generator turn on signal circuit for at least 15 seconds.