Electrical Component Function

TURBINE SHAFT SPEED SENSOR
The Turbine Shaft Speed (TSS) sensor is a variable reluctance sensor used with the vehicle electronic control system. The sensor, along with a rotating exciter wheel on the driven sprocket, sends a signal to the Powertrain Control Module (PCM). The PCM reads this signal and reacts to the speed information it transmits by controlling the clutch application.






SHIFT CONTROL SOLENOID
Three ON/OFF solenoids are used for electronic shift scheduling. The solenoids are located in the main control valve body. They are a two-way, normally open style. Solenoids SS1, SS2, SS3, provide gear selection of first through fourth gears by controlling the pressure of the three shift valves and the forward clutch control valve.






TRANSMISSION FLUID TEMPERATURE SENSOR
The Transmission Fluid Temperature (TFT) sensor informs the PCM of transaxle oil temperature. It is a thermistor whose resistance varies according to temperature.






ELECTRONIC PRESSURE CONTROL SOLENOID
The Electronic Pressure Control (EPC) solenoid regulates transaxle EPC pressure, backout valve pressure, and line pressure.






TORQUE CONVERTER CLUTCH SOLENOID
The Torque Converter Clutch (TCC) solenoid receives an electronic signal from the PCM and uses this information to vary pressure which sets the slip in the converter clutch.






VEHICLE SPEED SENSOR
The Vehicle Speed Sensor (VSS) is a magnetic pickup that sends a signal to the PCM. The VSS signal tells the PCM the vehicle speed. The VSS is used to determine shift scheduling and electronic pressure control.






TRANSMISSION RANGE SENSOR
The PCM send a voltage signal to the Transmission Range (TR) sensor. The TR sensor incorporates a series of step-down resistors which act as a voltage divider. The PCM monitors this voltage which corresponds to the position of the manual control lever. The TR sensor determines the desired gear and EPC pressure. In addition, the TR sensor also contains the PARK/NEUTRAL and backup lamp circuits.