Powertrain Control Module (PCM)

The PCM controls fuel delivery and for KL6 vehicles, determines which fuel system operates the engine. The PCM monitors various engine and vehicle functions to provide the correct amount of CNG or gasoline fuel under all operating conditions. This provides excellent driveability and fuel economy while maintaining reduced emission levels. When operating on gasoline, the PCM will turn the fuel indicator lamp ON. The fuel indicator lamp (FIL) is located within the headlamp switch assembly near the fuel gauge select switch. The FIL is also turned ON for a two-second bulb check whenever the ignition is turned ON. The fuel gauge select switch allows the vehicle operator the ability to request fuel gauge display of either fuel tank.