VALVE GP-PILOT 1211814 - Caterpillar

Actual RackThe ECM's 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 Rock" should follow "Desired Rack".After Market DeviceA device or accessory installed by the customer after the engine is delivered.Alternating Current (AC)The direction of current flow changes (alternates) regularly and constantly.American Wire Gauge (AWG)A measure of the diameter (and therefor the current carrying ability) of electrical wire. The smaller the AWG number, the larger the wire.Boost Pressure SensorThis sensor measures inlet manifold air pressure and sends a signal to the ECM.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.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.CodeSee Diagnostic Code.Customer Specified ParameterA Parameter that can be changed and whose value is set by the customer. Protected by Customer Passwords.Data LinkAn electrical connection for communication with other microprocessor based devices that are compatible with the American Trucking Association 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 governor trying to maintain "Desired RPM". "Desired Rack" will not go farther than the "FRC Rack" or "Rated Rack".Desired Engine SpeedAn 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 CodeSometimes referred to as a "fault code", it is an indication of a problem or event in the ECM 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.Direct CurrentThe type of current where the only direction of current flow is consistently in one direction only.Duty CycleSee 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 ECM electronics, monitors ECM inputs and acts as a governor to control engine rpm.Engine Speed SensorA magnetic sensor that measures engine speed from the rotation of the flywheel.Engine Synchronization (Power Link)To control PORT or STBD engines using a single throttle lever.Failure Mode Identifier (FMI)Type of failure the component experienced (adopted from SAE standard practice J1587 diagnostics). Fuel Ratio Control (FRC) Rack PositionFRC Fuel Pos.