Sierra 1500 4WD V8-5.3L VIN T (2004)
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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The driver door module (DDM)
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The passenger front door module (PDM)
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The body control module (BCM)
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The instrument panel cluster (IPC)
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The driver information center (DIC)
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The driver door ajar switch
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The passenger door ajar switch
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The left rear door ajar switch
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The right rear door ajar switch
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The liftgate ajar switch
DRIVER DOOR AJAR AND PASSENGER DOOR AJAR
The DDM and PDM receive a discrete input from the respective door ajar switch to indicate the status of the door. The DDM or PDM then
communicates this status to the IPC via class 2 message. The IPC, upon receipt of this class 2 message, will illuminate the appropriate door ajar
message in the DIC and also send a class 2 message to the radio to activate the door ajar audible warning when the following conditions are met:
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The transmission is removed from PARK
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The vehicle speed is greater then 8.05 km/h (5 mph)
LEFT REAR DOOR AJAR AND RIGHT REAR DOOR AJAR
The BCM receives a discrete inputs from both the left and right rear door and liftgate ajar switches to indicate the status of the doors and liftgate. The
BCM then communicates this status to the IPC via class 2 message. The IPC, upon receipt of this class 2 message, will illuminate the appropriate door
ajar message in the DIC and also send a class 2 message to the radio to activate the door ajar audible warning when the following conditions are met:
-
The transmission is removed from PARK
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The vehicle speed is greater then 8.05 km/h (5 mph)
