Diagnostic Starting Point - SIR
WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Begin the system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check - SIR will provide 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 of any stored diagnostic trouble codes (DTCs) and their status
The use of Diagnostic System Check - Vehicle in Vehicle DTC Information, will identify the correct procedure for diagnosing the system and where the procedure is located.