CTS V6-2.8L (2006)
Navigation System: Initial Inspection and Diagnostic Overview
DIAGNOSTIC STARTING POINT - NAVIGATION SYSTEM
Begin the system diagnosis with the Diagnostic System Check - Vehicle. The Diagnostic System Check - Vehicle will provide the following information:
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The identification of the control modules which command the system.
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The ability of the control modules to communicate through the serial data circuit.
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The identification of any stored DTCs and their status. See: Testing and Inspection/Initial Inspection and Diagnostic Overview
The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.
