Diagnostic Starting Point - Automatic Transmission

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

• The identification of the control modules which commands the system
• The ability of the control modules to communicate through the serial data circuit
• The identification and status of stored diagnostic trouble codes (DTCs)

The use of Diagnostic System Check - Vehicle identifies the correct procedure for diagnosing the system and the procedure location.