For 1990-2009 cars only
Begin the system diagnosis with Powertrain On Board Diagnostic (OBD) System Check . The Powertrain OBD System Check provides 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 Powertrain OBD System Check identifies the correct procedure for diagnosing the system and where the procedure is located.
