Diagnostic System Check

WARNING: This page is about a different car, the 2003 Buick Regal, 2003 Buick Century, 2002 Buick Regal, and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The diagnostic system check is for the anti-lock brake system and will provide the following information:

The identification of the control module(s) which command the system.
The ability of the control module(s) to communicate through the serial data circuit.
The identification of any stored Diagnostic Trouble Codes (DTCs) and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located. For diagnostic system check see appropriate ANTI-LOCK article.