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Home >> Buick >> 2019 >> Envision Base >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> DTC B396C or B396D - Liftgate Interior Release Open/Close Switch Malfunction >> Circuit/System Description

Circuit/System Description

For an overview of the component/system, refer to: Liftgate Description and Operation 

Circuit Description
Signal The control module input circuit has an internal resistance connected to 12 V.
Ground Chassis Ground
Component Description
S45B Liftgate Control Switch - Interior Each function has its own switch.The switches are connected to a resistor ladder so that a specific resistance is generated for each switch.
K39 Liftgate Control Module The control module K39 controls the liftgate motor function depending on inputs from a variety of sensors, switches and serial data information from other control modules.
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