Tahoe 2WD V8-6.0L Hybrid (2008)
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 switch (DDS)
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The passenger door switch (PDS)
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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
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The liftgate glass ajar switch
Driver Door Ajar And Passenger Door Ajar
The driver door switch (DDS) and passenger door switch (PDS) receive a discrete input from the respective door ajar switch to indicate the status of the
door. The DDS or PDS then communicates this status to the instrument panel cluster (IPC) via LAN message. The IPC, upon receipt of this LAN
message, will illuminate the appropriate door ajar message in the driver information center (DIC) and also send a LAN 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 body control module (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 instrument panel cluster (IPC) via LAN message. The IPC, upon receipt of this LAN message, will illuminate
the appropriate door ajar message in the driver information center (DIC) and also send a LAN 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)
REAR ACCESS OPEN Message
The instrument panel cluster (IPC) illuminates the REAR ACCESS OPEN message when the body control module (BCM) detects that the liftgate or
liftglass is ajar or open. The IPC receives a LAN message from the BCM requesting illumination. If the vehicle is in the forward or reverse gear position,
the BCM activates an audible warning.
