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Home >> Cadillac >> 2009 >> STS Base, 3.6 V, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 101 (Cellular System, Entertainment System & Navigation System) >> Diagnostic Information and Procedures >> DTC B2455 >> Circuit/System Description
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Circuit/System Description

WARNING: This page is about a different car, the 2009 Saturn Outlook, 2009 GMC Acadia, 2009 Chevrolet Traverse, and 2009 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

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

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