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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 137 (Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC B1277: Microphone 1 Input Signal Circuit (IO5/IO6) >> Conditions for Running the DTC

Conditions for Running the DTC

WARNING: This page is about a different car, the 2018 GMC Terrain and 2018 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

The human machine interface control module performs a self diagnostic of the microphone circuits once after initial power up.

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