ION L4-2.2L VIN F (2004)
Door Switch: Description and Operation
DOOR AJAR SWITCHES
The CTD system uses the door ajar switches in the door jambs as 1 method to activate the alarm. The body control module (BCM) monitors all door ajar
switches via a discrete input from each door ajar switch, including the rear compartment. If the BCM receives a ground signal from a door ajar switch
when the CTD system is armed, the BCM activates the alarm.
