Circuit DescriptionFuel pump self-test is provided at power-up. In an ideal case, an active Fault Code 374indicates a fuel pump...

Circuit DescriptionThe ECM contains the calibration-specific parameter to control the engine’s performance and diagnostics. The fuel pump has its own...

Circuit DescriptionThe ECM contains the calibration-specific parameter to control the engine’s performance and diagnostics. The fuel pump has its own...

Circuit DescriptionThis diagnostic is meant to act as a speed and fueling rationality check between the enginecontrol module (ECM) and...

Circuit DescriptionThis circuit is internal to the ECM. If the keyswitch is turned off and the ECM still detectsmessages being...

Circuit DescriptionThe intake air heater improves starting and white smoke control in cold ambient conditions.The ECM controls relays that switch...