Envoy 4WD V8-5.3L VIN M (2005)
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
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 ajar switches to indicate the status of the doors. 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:
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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)