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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Instrument Panel System Displays And Gauges) >> Diagnostic Information and Procedures >> DTC B124F: Universal Serial Bus (USB) Programming Files >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The instrument cluster can communicate with other devices on a Media Oriented Systems Transport (MOST) bus. Some of the other devices may be connected to a USB port. This allows programming of the instrument cluster using a USB device via the MOST bus. Software checks are performed to ensure the internal MOST circuitry is operating properly.

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