BELT-SERPENTINE 1855872 - Caterpillar

After Market DeviceAs used here, a device or accessory installed by the customer or vehicle OEM after the engine is delivered.Air-To-Air Aftercooler (ATAAC)A means of cooling intake air after the turbocharger, using ambient air for cooling. The intake air is passed through an aftercooler (heat exchanger) mounted in front of the radiator before going to the intake manifold.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.Atmospheric Pressure SensorThis sensor measures atmospheric air pressure and sends a signal to the ECM.Before Top Dead Center (BTDC) or Before Top Center (BTC)The 180° of crankshaft rotation before the piston reaches Top Dead Center (normal direction of rotation).Boost Pressure SensorThis sensor measures inlet manifold air pressure and sends a signal to the ECM.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.Caterpillar Engine ProtectionThe part of the Caterpillar Electronic Engine Control that monitors Coolant Temperature, Oil Pressure, and Coolant Level to flag the operator of detected problems. The Coolant Temperature and Oil Pressure Sensors are supplied by Caterpillar and monitored by the ECM. The Coolant Level Sensor is Vehicle OEM installed, but still monitored by the ECM. This is opposed to an After Market Engine Protection System which does not interface with the Caterpillar Electronic Engine Control.Coolant Level SensorThis OEM installed sensor detects the absence/presence of coolant at the probe and sends a signal to the ECM.Cruise Control RangeThe range that the cruise control can operate within. Usually limited to the speed range anticipated on the open road.CodeSee Diagnostic Code.Coolant Temperature SensorThis sensor detects the engine coolant temperature for Cold Mode operation and Caterpillar Engine Protection (if Engine Protection is not programmed OFF)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 RPMAn input to the electronic governor within the ECM. The electronic governor uses inputs from the Throttle Position Sensor, Engine Speed/Timing Sensor and Customer Parameters to determine "Desired RPM".Desired Timing Advance ("Des Timing Adv" on ECAP)The injection timing advance calculated by the ECM as required to meet emission and performance specifications.Diagnostic CodeSometimes referred to as a "fault code", it is an indication of a problem or event in the 3176 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.Digital Diagnostic Tool (DDT)A Caterpillar electronic service tool used for programming and for diagnosing the 3176 system.Direct Current (DC)The type of current where the direction of current flow