Conditions for Running the DTC

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle power mode is RUN.
Accessory voltage is 9-18 volts.
The vehicle has passed a successful precharge and the High Voltage contactor relays have been closed this ignition.
The HPCM is commanding the BECM to keep the HV contactor relays closed.