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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Image Display Camera System) >> Diagnostic Information And Procedures >> DTC B127B: Rearview Camera Input Signal Circuit (IO5/IO6 Without MAH/MBC) >> Diagnostic Fault Information
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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
Ignition B127B 2B or 1 B127B 2B or 1 - -
Camera Module signal + B127B 2B or 3 B127B 2B or 1 B127B 2B or 2 -
Camera Module signal - B127B 2B or 3 B127B 2B or 1 B127B 2B or 1 -
Ground - B127B 2B or 1 - -
Shield - 3 - -
1. Rear vision camera image not displayed
2. Rear vision camera image always displayed
3. Poor Quality Image (as described in Circuit/System Verification)