Ignition Switch Off Mode

WARNING: This page is about a different car, the 2012 Dodge Charger. 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, O2S sensor Heater Monitor test is being run. Refer to ON-BOARD DIAGNOSTICS .
No inputs are monitored except for the heated O2S sensors. The PCM monitors the heating elements in the O2S sensors and then shuts down.