Initial Inspection and Diagnostic Overview

Diagnostic Starting Point - Horns

Begin the system diagnosis with Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview). The Vehicle Diagnostic System Check will provide the following information:

* The identification of the control modules which command the system
* The ability of the control modules to communicate through the serial data circuit
* The identification of any stored DTCs and their status

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