Ignition Switch Off Mode

WARNING: This page is about a different car, the 2003 Dodge Intrepid, 2003 Chrysler Intrepid, 2003 Chrysler Concorde, and 2003 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.

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

All outputs are turned off, unless O2 Heater Monitor test is being run. Refer to the Emission section 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.