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Home >> Chevrolet >> 2012 >> Chevy Express H1500, Van Cargo >> Repair and Diagnosis >> External Pages >> Different car >> Section 1921 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2455 >> Circuit/System Description

Circuit/System Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 GMC Savana Special, 2011 GMC Savana Camper Special, 2011 GMC Savana, 2011 Chevrolet RV Cutaway, and 2011 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle communication interface control module provides the cellular phone microphone with a supplied voltage on the cellular phone microphone signal circuit. When the microphone is in use, voice data from the user is sent back to the vehicle communication interface control module on the signal circuit. The vehicle communication interface control module provides a ground for the cellular phone microphone via the low reference wire.

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