Conditions for Setting the DTC

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

When the inadvertent power relay control circuit is shorted to ground.
When there is an open or short to battery voltage on the inadvertent power relay ground circuit.
An open CTSY fuse or open in the battery supply circuit to the inadvertent power relay.
The above conditions must be met for 0.5 seconds.