Begin the system diagnosis with Diagnostic System Check - Engine Controls in Engine Controls - LV6. The Diagnostic System Check provides the following information:
| • | The identification of the control module which commands the system |
| • | The ability of the control module to communicate through the serial data circuit |
| • | The identification and status of stored diagnostic trouble codes (DTCs) |
The use of Diagnostic System Check - Engine Controls in Engine Controls - LV6 identifies the correct procedure for diagnosing the system and where the procedure is located.
Symptoms
When it has been determined through Diagnostic System Check - Engine Controls in Engine Controls - LV6 that no DTCs are present. If it is determined that a malfunction exists, identify the concern by referring to the Powertrain On Board Diagnostic (OBD) System Check - Automatic Transmission table. The Powertrain On Board Diagnostic (OBD) System Check - Automatic Transmission table provides common diagnostic categories which relate directly to diagnostic information or procedures.
