BRACKET 3247886 - Caterpillar

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.Analog SensorsAnalog Sensors produce a DC output signal that can vary from +0.2 to +4.8 VDC. The sensors are used to detect and convert a change in temperature or pressure into an electrical signal.Analog Sensor SupplyThe +5 VDC supply from the ECM is used to power the analog sensors. Refer to P-521: Analog Sensor Supply.Analog Sensor ReturnThe common line (ground) for the Analog Sensor supply from the ECM used to power the analog sensors.Atmospheric Pressure SensorThis sensor measures air pressure near the air filter and sends a signal to the Electronic Control Module (ECM).Before Top Center (BTC)The 180 degrees of crankshaft rotation before the piston reaches the very top of its travel during the compression stroke (normal direction of rotation).Bypass Circuit or HarnessA circuit (usually temporary) used as a substitute for an existing circuit, typically for test purposes.CalibrationAs used here, is an electronic adjustment of a sensor signal.CAT Data LinkA two wire electrical connection for communication with other microprocessor based devices such as the electronic monitoring system. The CAT data link is also the serial communication medium used for programming and troubleshooting with Caterpillar Electronic Service Tools.CodeRefer to Diagnostic Code.Cold ModeA mode of engine operation where the timing is retarded and the low idle may be raised for engine protection, reduced smoke emissions and faster warm up time.Component IDentifier (CID)A number which represents each component in the electronic control system. Refer to Section 4: Diagnostic Terminology in this manual.Communication Adapter ToolThe Communication Adapter Tool provides a communication link between the ECM and the Electronic Service Tool.Coolant Temperature SensorThis analog sensor measures jacket water temperature and sends a signal to the Electronic Control Module (ECM).Desired RPMAn input to the electronic governor control within the ECM. The electronic governor uses inputs from the Throttle Position Sensor and Speed/Timing Sensor to determine Desired RPM.Diagnostic CodeAn indication of a problem or event in the electronic system.DT, DT Connector, Deutsch DTA type of connector manufactured by Deutsch that is used on Caterpillar engines.Duty CycleRefer to Pulse Width Modulation.EPROMA type of computer memory chip. EPROM is defined as an Erasable Programmable Read Only Memory.Electronic Control Analyzer Programmer (ECAP)A Caterpillar Electronic Service Tool developed by Caterpillar for programming and diagnosing a variety of Caterpillar electronic controls using the RS-232 data link.Electronic Control Module (ECM)The engine control computer that provides power to the electronic system, monitors sensors and component inputs, and acts as a governor to control injection timing and the engine rpm.Electronic Engine ControlThe complete electronic system that monitors and controls engine operation under all conditions.Electronic Technician (Cat ET)A software program that runs on a personal computer (PC). Similar in functionality to the ECAP. Engine Monitoring SystemA programmable system that allows the ECM to take various actions (warning, derate, or shutdown) if an engine parameter is out of range. An example would be the ECM derating the engine if the