SLIP JOINT GP 5V2547 - Caterpillar

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Pulse Width Modulated SignalSpeed Sensors (Transmission and Torque Converter Output)
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Speed SensorThere are two transmission output speed sensors and one torque converter output speed sensor on the machine. The speed sensors are inputs of the Power Train ECM. These speed sensors are frequency sensors. Frequency sensors produce a signal (Hz) which varies as the condition changes. The sensor generates an approximate sine wave signal from the gear teeth as the gear teeth pass the sensor. The sensor produces a signal that equals one pulse per gear tooth. This signal is sent to the Power Train ECM. The Power Train ECM measures the frequency of the signal in order to determine the speed of the condition. The Power Train ECM receives signals from the speed sensors. The Power Train ECM uses the input from the speed sensors in order to determine the speed of the system. The Power Train ECM uses the input from the speed sensors in order to regulate transmission shifts. Each speed sensor has two connections to the Power Train ECM (+ and −).The transmission output speed sensor 1 connects to connector contacts J1-4 and J1-5 of the Power Train ECM.The transmission output speed sensor 2 connects to connector contacts J1-2 and J1-3 of the Power Train ECM.The torque converter output speed sensor connects to connector contacts J1-15 and J1-16 of the Power Train ECM.The Power Train ECM sends the speed information to other electronic control modules via the CAT Data Link. Two transmission speed sensors measure transmission output speed. The Power Train ECM uses the pair of transmission output speed sensors to determine the direction of rotation.Note: The speed sensors are used to diagnose each other during normal operation. The Power Train ECM periodically checks the value from the speed sensor. If an incorrect value is found, the Power Train ECM will log a service code that indicates a fault for a speed sensor circuit.ReferenceFor more information on diagnostic operations for the power train electronic control system, refer to Systems Operation, "Power Train Electronic Control System".ReferenceFor more information on the CAT Data Link, refer to Systems Operation, "CAT Data Link".ReferenceFor more information on the Power Train Electronic Control