Initial Inspection and Diagnostic Overview

Diagnostic Starting Point - Automatic Transmission Shift Lock Control
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 command the system
^ The ability of the control modules to communicate through the serial data circuit
^ The identification of any stored Diagnostic Trouble Codes (DTCs) and their status

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