Initial Inspection and Diagnostic Overview

DIAGNOSTIC STARTING POINT

Begin the system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check will provide the following information:
- The identification of the control module which commands the system
- The ability of the control module to communicate through the serial data circuit
- The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of Diagnostic System Check - Vehicle in Vehicle DTC Information, will identify the correct procedure for diagnosing the system and where the procedure is located.