Diagnostic Methods Overview

The Diagnostic Methods provide detailed instructions on how to access or perform routine diagnostic tasks. This can be referenced as many times as needed for step-by-step instructions for routine procedures.

When performing powertrain diagnostics, the system may be checked by an off board tester referred to as a scan tool.

Most of these tests are written assuming the use of a New Generation STAR (NGS) tester. When using a generic OBDII scan tool, refer to the scan tool manufacturer's instruction manual for directions.