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Door Ajar Indicator Description and Operation

Door Ajar Indicator Description and Operation

Door Ajar Indicator System Components

The door ajar indicator system consists of the following components:


• Body Control Module (BCM)

• Instrument Panel Cluster

• Driver door latch

• Passenger door latch

• Left rear door latch

• Right rear door latch

• Liftgate door latch

• Driver window motor

• Passenger window motor

• Left rear window motor (with AER)

• Right rear window motor (with AER)

• Left rear window switch (with AEQ)

• Right rear window switch (with AEQ)


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 sends this status on to the BCM via the local interconnect network (LIN) bus. The BCM communicates with the instrument cluster via a GMLAN message. The instrument panel cluster, upon receipt of this GMLAN message, will illuminate the driver door ajar indicator and also send a GMLAN 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 (with AER)

The passenger window motor, left rear window motor and right rear window motor receive a discrete input from the respective door ajar switch within the door latch to indicate the status of the door. The window motors then communicate this status to the BCM via local interconnect network (LIN) bus. The BCM communicates with the instrument cluster via a GMLAN message. The instrument panel cluster, upon receipt of this GMLAN message, will illuminate the appropriate door ajar indicator and also send a GMLAN 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 (with AEQ)

The passenger window motor, 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 send this status to the BCM via the local interconnect network (LIN) bus. The BCM communicates with the instrument cluster via a GMLAN message. The instrument panel cluster, upon receipt of this GMLAN message, will illuminate the appropriate door ajar indicator and also send a GMLAN message to the radio to activate the door ajar audible warning when the vehicle speed is greater then 8 km/h (5 MPH).