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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis >> Body & Frame >> Fixed And MOVEABLE Windows >> Diagnostic Information and Procedures >> DTC B316B: Driver Window Switch >> Circuit/System Description
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Circuit/System Description

For an overview of the component/system, refer to Power Windows Description and Operation 

Circuit Description
B+-M74D Window Motor - Driver Supplied from a fuse.
B+-S79D Window Switch - Driver Supplied from a fuse.
Power Window Switch Driver Up Signal The output circuit is switched to ground to activate the component.
Power Window Switch Driver Down Signal The output circuit is switched to ground to activate the component.
Power Window Switch Driver Express Signal The output circuit is switched to ground to activate the component.
Ground Chassis Ground
S79D Window Switch - Driver The S79D sends a serial data message to the K9 indicating the M74 function that has been requested.
M74D Window Motor - Driver
  • Power Window Control
  • The control module also reads various switches and sensors and makes their values available via serial data.
K9 Body Control Module The module controls various vehicle functions like lighting, central door locking, power windows, etc.
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