SPACER 3T5284 - Caterpillar

Active Diagnostic Code - An active diagnostic code alerts the operator or the service technician that an electronic system malfunction is currently present. Refer to the term "Diagnostic Code" in this glossary.Adaptive Trim - This is a software process that is performed in the Electronic Control Module (ECM) that optimizes engine performance.Alternating Current (AC) - Alternating current is an electric current that reverses direction at a regular interval that is reoccurring.Before Top Center (BTC) - BTC is the 180 degrees of crankshaft rotation before the piston reaches the top dead center position in the normal direction of rotation.Breakout Harness - A breakout harness is a test harness that is designed to connect into the engine harness. This connection allows a normal circuit operation and the connection simultaneously provides a Breakout T in order to measure the signals.Bypass Circuit - A bypass circuit is a circuit that is used as a substitute circuit for an existing circuit. A bypass circuit is typically used as a test circuit.CAN Data Link (see also J1939 CAN Data Link) - The CAN Data Link is a serial communications port that is used for communication with other microprocessor based devices.Code - Refer to "Diagnostic Code" or "Event Code".Communication Adapter Tool - The communication adapter provides a communication link between the ECM and the electronic service tool.Component Identifier (CID) - The CID is a number that identifies the specific component of the electronic control system that has experienced a diagnostic code.Coolant Temperature Sensor - The coolant temperature sensor detects the engine coolant temperature for all normal operating conditions and for engine monitoring.Data Link - The Data Link is a serial communication port that is used for communication with other devices such as the electronic service tool.Derate - Certain engine conditions will generate event codes. Also, engine derates may be applied. The map for the engine derate is programmed into the ECM software. The derate can be one or more of 3 types: reduction of rated power, reduction of rated engine speed and reduction of rated machine speed for OEM products.Desired Engine Speed - The desired engine speed is input to the electronic governor within the ECM. The electronic governor uses the signal from the throttle position sensor, the engine speed/timing sensor, and other sensors in order to determine the desired engine speed.Diagnostic Code - A diagnostic code is sometimes referred to as a fault code. These codes indicate an electronic system malfunction.Warning Lamp - A warning lamp is sometimes called the check engine light. The warning lamp is used to warn the operator of the presence of an active diagnostic code. The warning lamp is located on the control panel.Digital Sensor Return - The common line (ground) from the ECM is used as ground for the digital sensors.Digital Sensors - Digital sensors produce a pulse width modulated signal. Digital sensors are supplied with power from the ECM.Digital Sensor Supply - The power supply for the digital sensors is provided by the ECM.Direct Current (DC) -