09071-00691 BELLOWS ASSY, PNEU Denso Cross

Example of Pulse Width Modulation SignalsRated 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.Retarder Enable SignalThe retarder enable signal interfaces the ECM to the engine retarder. This will prohibit operation of the engine brake during undesirable engine operating conditions (such as while the engine is being fueled).SensorA device used to detect and convert a change in pressure, temperature, or mechanical movement into an electric 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 PWM signal to the ECM, which the ECM interprets as engine speed and crankshaft position.Subsystemas used here, it is a part of the 3176 System that relates to a particular function, for instance: vehicle speed 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.Vehicle Speed BufferA device used to condition and amplify the output of the Vehicle Speed Sensor.Vehicle Speed SensorAn electro-magnetic pickup that measures vehicle speed from the rotation of gear teeth in the drive train of the vehicle.