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Location of the transmission speed sensor (1) Engine output speed sensor (2) Torque converter output speed sensor (3) Transmission intermediate speed sensor (4) Transmission output speed sensors (two) | |
Each speed sensor has two connections to the ECM (+ and −). For all of the speed sensors, connector contact "2" is the signal line and connector contact "1" is the return line. The speed sensors send an AC frequency signal (Hz) that matches the number of gear teeth passing the sensor per second to the ECM. The ECM compares the frequency from the speed sensor (Hz) to the number of pulses per revolution in order to determine the speed of the rotating components. The ECM uses the input from the speed sensors in order to regulate some of the transmission shifts.
There are two transmission output speed sensors (4), one transmission intermediate sensor (3), and one torque converter output speed sensor (2) on the CX48-P2300 transmission. Torque converter output speed sensor (2) actually reads the speed increaser ring gear speed which is 1.359 times the torque converter output speed. A second output speed sensor (3) is provided for customer use. Engine output speed sensor (1) is also provided with the transmission and the customer is responsible for installing the sensor on the engine flywheel housing. All speed sensors are used to determine if any individual speed sensor has failed.