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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 251 (Driver Monitoring System) >> Diagnostic Information and Procedures >> DTC B0126 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2021 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

The Driver Monitoring System Control Module performs fault detection on itself and the camera attached to it. The camera is attached to the Driver Monitoring System Control Module via a coax cable. All of the video signals, communication signals, as well as the power and ground are provided by the coax cable.

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