Begin the system diagnosis with Diagnostic System Check - Manual Transmission . The Diagnostic System Check - Manual Transmission 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 and the status of any stored diagnostic trouble codes (DTCs) | 
Use the Diagnostic System Check - Manual Transmission in order to identify the correct procedure for diagnosing the system and where the procedure is located.