Diagnostic Starting Point. Chevrolet PJJ 2000

For 1990-2009 cars

Begin the system diagnosis with Diagnostic System Check - SIR . The Diagnostic System Check - SIR will provide the following information:

• | The identification of the control module(s) which commands 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 Diagnostic System Check - SIR will identify the correct procedure for diagnosing the system and where the procedure is located.