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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 119 (Active Noise Cancellation System) >> Diagnostic Information and Procedures >> DTC B126F, B1277, B127C, or B127D (IOR) >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

For an overview of the component/system, refer to:Active Noise Cancellation Description and Operation 

Circuit Description
Microphone (+) Signal The control module input circuit has an internal resistance connected to 8 V.
Microphone (-) Low Reference Grounded through the control module.
Component Description
A11 Radio The radio is used for entertainment and may contain other functions like navigation.
B77LF Radio Volume Compensator Interior Noise Microphone - Left Front The microphone converts an acoustic signal into an electrical signal.
B77RF Radio Volume Compensator Interior Noise Microphone - Right Front The microphone converts an acoustic signal into an electrical signal.
B77R Radio Volume Compensator Interior Noise Microphone - Rear The microphone converts an acoustic signal into an electrical signal.
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