Automatic Transmission Fluid Temperature Sensor
The automatic transmission fluid temperature sensor is installed on the valve body. This sensor uses the thermistor that resistance changes according to the temperature change. When PCM/TCM supplies approximately 3.3V power to the sensor, the sensor output changes according to the temperature change of ATF.
This automatic transmission fluid temperature is a very important element in the automatic transmission and it is entered to PCM, and this fluid temperature sensor information is used for various important purposes such as the operation of damper clutch, detection of non-operation area, fluid temperature variation control and fluid pressure control at the time of shifting.
The input shaft and output shaft speed sensors are integrated and installed inside the automatic transmission. The current type hall sensor is used and the current changes according to magnetic variation. Each sensor circuit consists of 2 pins and the circuit which PCM/TCM sends power and controls through the component is configured. This input sensor provides important input information for electronic control and this information is necessary in all operation ranges such as feedback control, damper clutch control, shift stage setting control, line pressure control, clutch operation pressure and other sensor defect judgment criteria.