Volt

Door Ajar Indicator Description and Operation

The door ajar indicator system consists of the following components:

The driver window motor supplies a 12 volt signal to the door ajar switch within the door latch, when the driver door is open the door ajar switch closes pulling the 12 volts signal low. When the driver window motor detects the drop in the 12 volt signal circuit, it will then communicate this status to the BCM via local interconnect network (LIN) bus. The BCM communicates with the instrument cluster via serial data message. The instrument panel cluster, upon receipt of this serial data message, will illuminate the driver door ajar indicator and also send a serial data message to the radio to activate the door ajar audible warning when the vehicle speed is greater then 8 km/h (5 MPH).

The passenger window motor, the left rear window switch and right rear window switches each supplies a 12 volt signal to their respective door ajar switch within the door latch, when the a door is open the door ajar switch closes pulling the 12 volts signal low. When the passenger window motor, the left rear window switch or right rear window detects the drop in the 12 volt signal circuit, it will then communicate this status to the BCM via local interconnect network (LIN) bus. The BCM communicates with the instrument cluster via serial data message. The instrument panel cluster, upon receipt of this serial data message, will illuminate the appropriate door ajar indicator and also send a serial data message to the radio to activate the door ajar audible warning when the vehicle speed is greater then 8 km/h (5 MPH).