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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 326 (Fixed And MOVEABLE Window System) >> Diagnostic Information and Procedures >> DTC B316B, B317A, B318A, or B319A : Window Switch (AEC, AED, AEQ) >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) monitors, receives and transmits serial data messages to each of the door window switches. The driver master control contains switches to control the passenger and rear windows. When a switch is used on the driver master control, a serial data message is sent to the BCM which sends a serial data message to the appropriate passenger or rear window switch to move in the window in the direction commanded.

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