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Home >> Cadillac >> 2015 >> CTS V, Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System (Coupe) >> Diagnostic Information and Procedures >> DTC B0997: Auxiliary Electronic Control Unit (ECU) 2 >> Circuit/System Description
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Circuit/System Description

The navigation radio communicates with the navigation display via serial data. If the navigation radio receives an improper status response message, DTC B0997 will set.

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