July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Ignition Switch Off Mode

When the operator turns the ignition switch to the OFF position, the following occurs:

All outputs are turned off, unless 02 Heater Monitor test is being run. Refer to the appropriate Emission service information for On-Board Diagnostics.
No inputs are monitored except for the heated oxygen sensors. The PCM monitors the heating elements in the oxygen sensors and then shuts down.