LaCrosse FWD V6-3.0L (2010)
Door/Trunk Ajar Indicator/Lamp: Description and Operation
Door Ajar Indicator Description and Operation
Door Ajar Indicator System Components
The door ajar indicator system consists of the following components:
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Body control module (BCM)
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Instrument cluster
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Driver door latch
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Passenger door latch
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Left rear door latch
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Right rear door latch
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Driver window motor
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Passenger window switch
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Left rear window switch
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Right rear window switch
Driver Door Ajar
The driver window motor receives a discrete input from the door ajar switch within the door latch to indicate the status of the door. The driver window
motor 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).
All Passenger Doors Ajar
The passenger window switch, left rear window switch and right rear window switch receive a discrete input from the respective door ajar switch within
the door latch to indicate the status of the door. The window switches 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).
