Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
Transmission Speed Sensor: Description and Operation
I: TORQUE CONVERTER TURBINE SPEED SENSOR
The torque converter turbine speed sensor (output shaft speed sensor) is externally mounted on the transmission case.
The sensor detects the torque converter turbine speed in terms of the rotation speed of the periphery of the high clutch drum coupled to the input shaft,
and sends sine wave signals (32 pulses per rotation) to the TCM. The TCM calculates the proportion of the input shaft speed to the vehicle speed and
determines whether the shifting is to be made or not.
