Circuit/System Verification
WARNING: This page is about a different car, the 2008 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, engine OFF, observe the scan tool Battery Voltage parameter in the Power Steering Control Module Data List. The specified value should be greater than 10 volts. If not greater than the specified value, check for an electrical intermittent. Refer to Testing for Intermittent Conditions and Poor Connections .