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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1277 >> 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:Radio/Audio System Description and Operation (IOS/IOT) , or Radio/Audio System Description and Operation (IOR) 

Circuit Description
Microphone (+) Signal The control module input circuit has an internal resistance connected to ground.
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.
B24LF Mobile Telephone Microphone - Left Front The microphone converts an acoustic signal into an electrical signal.
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