Door/Trunk Ajar Indicator/Lamp: Description and Operation

CIRCUIT OPERATION
The door ajar warning lamp is used to alert the operator that a door is ajar. A chime tone is used along with the lamp for an audible warning.

There are four door ajar switches used. All of the switches are case grounded. The switches for the passenger door and the rear doors provide an input to the Body Control Module (BCM) on the G74 circuit. Circuit G75 is used for the drivers door. When any of the switches are grounded (door ajar), and the vehicle is moving, the Body Control Module (BCM) sends a signal over the CCD Bus to the instrument cluster for lamp illumination.

The driver's door works the same as the other doors, except the switch is also used for the Key-In reminder, and the Headlamp ON chime.

This feature is used to alert the operator the drivers door is ajar while the vehicle is in motion. The Body Control Module (BCM) uses information on vehicle speed from the CCD Bus and circuit G75 which connects to the drivers door ajar switch.