RADIATOR & HYD OIL COOLER GP 2616119 - Caterpillar

The engine speed sensor for the transmission is a magnetic sensor.The engine speed sensor is an input to the ECU. The sensor is designed to inform the ECU about the speed of the engine. The ECU uses the information from the speed sensor in order to calibrate the transmission solenoids. The ECU uses the information from the speed sensor in order to enable the lockup clutch. Also, the information is used in order to disable the lockup clutch. The lockup clutch is turned off if the engine speed is too low. The lockup clutch is turned on if the engine speed is too high. This is done in order to prevent overspeeds of the engine or stalling of the engine.The engine speed sensor is a frequency sensor. The speed sensor is located on the flywheel housing. The sensor generates an AC signal from the ring gear teeth as the teeth pass the sensor. The ECU measures the frequency of the signal and the ECU responds accordingly to the signal. The engine speed and the diagnostic status of the sensor are available to all modules through the J1939 data link.The engine speed sensor has a connector with two contacts.