Sensors

There are three pressure switches which identify solenoid application. The pressure switches are incorporated in an assembly with the solenoids. Two speed sensors read input (torque converter turbine) and output (parking sprag) speeds. There is also a Transmission Range Sensor (TRS) which senses manual valve position.

Engine speed, throttle position, temperature, etc., are also observed. Some of these signals are read directly from the engine control sensors; others are read from a multiplex circuit with the engine controller.