Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, compare the scan tool Prev. State of Charge and Start Up State of Charge parameters. The readings should not differ by more than 30 percent.

If the readings differ by more than 30 percent, refer to Battery Electrical Drain/Parasitic Load Test .