For 1990-2009 cars only
Begin the system diagnosis with Diagnostic System Check - Vehicle in Vehicle DTC Information. 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 - Vehicle in Vehicle DTC Information identifies the correct procedure for diagnosing the system and where the procedure is located.
Symptoms
When it has been determined through Diagnostic System Check - Vehicle in Vehicle DTC Information that no DTCs are present. If it is determined that a malfunction exists, identify the concern by referring to the Diagnostic System Check - Vehicle table. The Diagnostic System Check - Vehicle table provides common diagnostic categories which relate directly to diagnostic information or procedures.
