GEAR (SUN-19 TEETH) 5V8454 - Caterpillar

Actual RackThe ECM interpretation of the signal from the Rack Position Sensor which represents actual position of the rack, assuming the sensor signal is valid. If the rack controls are working properly, Actual Rack should follow Desired Rack.After Market DeviceA device or accessory installed by the customer after the engine is delivered.American Wire Gauge (AWG)A measure of the diameter (and therefore the current carrying ability) of electrical wire. The smaller the AWG number, the larger the wire.Atmospheric Pressure SensorThis sensor measures crankcase pressure and sends a signal to the ECM.Boost Pressure SensorThis sensor measures inlet manifold air pressure and sends a signal to the ECM.Breakout TA test harness designed to permit normal circuit operation while measuring voltages, typically inserted between the two ends of a connector.Brushless Torque Motor (BTM)Solenoid used to move fuel rack servo spool valve and timing advance spool valve.Bypass CircuitA circuit, usually temporary, to substitute for an existing circuit, typically for test purposes.CalibrationAs used here, is an electronic adjustment of a sensor signal.Check Engine LampSometimes referred to as the Diagnostic Lamp, it is used to warn the operator of the presence of an active diagnostic code. Some installations may have both.Component Identifier (CID)Two or three digit diagnostic code which is assigned to each component.Coolant Level SensorThe coolant level sensor operates as a coolant loss sensor indicating the presence/absence of coolant at the sensor probe tip.Coolant Temperature SensorThe coolant temperature sensor measures the temperature of the engine coolant. The ECM uses this information to set the mode of operation and to notify the operator of excessive engine temperature if the engine protection mode is not OFF.Customer Specified ParameterA parameter that can be changed and whose value is set by the customer. Protected by Customer Passwords.Data LinkA twisted two wire electrical connection for communication with other microprocessor based devices that are compatible with the American Trucking Association (ATA) and SAE Standard such as trip recorders, electronic dashboards, and maintenance systems. The Data Link is also the communication medium used for programming and troubleshooting with Caterpillar devices.Desired Rack Position (Des Rack Pos on ECAP)The rack position where the ECM wants to move the rack, based on the ECM trying to maintain Desired Speed (rpm). Desired Rack will not proceed beyond the FRC Rack or Rated Rack.Desired Engine rpmAn input to the electronic governor within the ECM. The electronic governor uses inputs from the Throttle Position Sensor, Synchronization Status and Customer Parameters to determine Desired rpm.Diagnostic CodeIt is an indication of a problem or event in the ECM or electronic system.Diagnostic LampSometimes referred to as the Check Engine Light, it is used to warn the operator of the presence of an active diagnostic code.Duty CycleRefer to Pulse Width Modulation.Electronic Control Analyzer Programmer (ECAP)A Caterpillar Electronic Service Tool used for programming and diagnosing a variety of electronic controls.Electronic Control Module (ECM)The engine control computer that provides power to the electronics, monitors sensor inputs and acts as a governor to control engine rpm.Engine Speed (rpm) SensorA magnetic sensor that measures engine