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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) >> Diagnostic Fault Information

Diagnostic Fault Information

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.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Microphone Signal B1277 02 B1277 04 B1277 04 -
Microphone Low Reference B1277 02 B1277 04 - -
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