System Description

The Powertrain Control Module (PCM) monitors engine operation. PCM contains a self-diagnostic system, which stores Diagnostic Trouble Codes (DTC) and compares them to On-Board Diagnostic II (OBD-II) standards.

The goal of OBD-II regulation is to provide vehicle with an on-board diagnostic system that is capable of continuously monitoring the efficiency of emission control systems, and to improve diagnosis and repair when system failures occur.

The Federal Test Procedure (FTP) sets maximum allowable emission standards. A Malfunction Indicator Light (MIL) must illuminate if a system or component either fails, or deteriorates to a point where vehicles emissions could rise to greater than 1 1/2 times FTP standards.

DTCs may only be retrieved using an On-Board Diagnostic (OBD-II) compatible scan tool. TECH 2 scan tool is recommended by manufacturer. Other suitable aftermarket scan tools are available.