Initial Inspection and Diagnostic Overview

Diagnostic Starting Point - Data Communications

Begin the system diagnosis with Diagnostic System Check - Vehicle. The Diagnostic System Check - Vehicle will provide the following information:

* The identification of the control modules which are not communicating.
* The identification of any stored diagnostic trouble codes (DTCs) and their status. Diagnostic System Check - Vehicle

The use of the Diagnostic System Check - Vehicle will identify the correct procedures to begin vehicle diagnosis. These must be performed before system DTC or symptom diagnosis.