Diagnostic Starting Point - Hydraulic Brakes

Begin the system diagnosis with the Brake Warning Diagnostic System Check Refer to A Diagnostic System Check. The Diagnostic System Check 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.Diagnostic System Check - Hydraulic Brakes
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.