19600-02651 PUMP ASSY, INJECTI Calibration Data

Example of Pulse Width Modulation Signals Rated Fuel Position("Rated Fuel Pos" on ECAP) - this indicates the maximum allowable fuel position (longest injection pulse). It will produce rated power for this engine configuration. Reference VoltageA regulated voltage supplied by the ECM to a sensor. The reference voltage is used by the sensor to generate a signal voltage. SensorA device used to detect and convert a change in pressure, temperature, or mechanical movement into an electrical signal. Service Program Module (SPM)A software program on a factory programmable computer chip, designed to adapt an ECAP or DDT to a specific application. Short CircuitA condition where an electrical circuit is unintentionally connected to an undesirable point. Example: a wire which rubs against a vehicle frame until it makes electrical contact. SignalA voltage or waveform used to transmit information, typically from a sensor to the ECM. Speed "burp"A sudden brief change in engine speed. Speed/Timing SensorProvides a Pulse Width Modulated (PWM) signal to the ECM, which the ECM interprets as crankshaft position and engine speed. Subsystemas used here, it is a part of the 3176 System that relates to a particular function, for instance: throttle position subsystem, etc. Supply VoltageA constant voltage supplied to a component to provide electrical power for its operation. It may be generated by the ECM, or it may be vehicle battery voltage supplied by the vehicle wiring. "T" HarnessA test harness designed to permit normal circuit operation while measuring voltages, typically inserted between the two ends of a connector. Throttle PositionThe ECM's interpretation of the signal from the throttle position sensor. Throttle Position SensorAn electronic sensor which is connected to the accelerator pedal and sends a Pulse Width Modulated Signal to the ECM. Total TattletaleTotal number of changes to all customer specified parameters. TransducerA device that converts a mechanical signal to an electrical signal. Transducer ModuleA sealed unit mounted on one end of the ECM, which contains the engine Boost Pressure Sensor.