An ATF sensor is a component within a vehicle's automatic transmission system that measures the temperature of the transmission fluid.
According to the provided reference, the ATF (Automatic Transmission Fluid) temperature sensor:
- Converts the fluid temperature into a resistance value. This is the primary function, acting as a transducer.
- Inputs this resistance value into the ECM (Engine Control Module). The ECM uses this data for various control functions related to the transmission.
- Receives voltage from the ECM via a specific terminal (THO1 in the reference example).
- Operates based on the principle that its resistance changes in relation to the transmission fluid temperature. As the fluid temperature changes, the electrical resistance of the sensor changes proportionally.
Essentially, it translates a physical property (temperature) into an electrical signal (resistance) that the vehicle's computer can understand and process.
Here's a summary of its interaction based on the reference:
| Component | Function | Interaction |
|---|---|---|
| ATF Sensor | Measures fluid temperature, converts to resistance | Receives voltage from ECM, Sends resistance value to ECM |
| ECM | Processes sensor data | Applies voltage to sensor, Receives resistance value from sensor |
| Transmission Fluid | Temperature is measured | Affects the resistance of the sensor |
By monitoring the ATF temperature, the ECM can adjust various transmission operations to ensure optimal performance and prevent overheating.
