there are engine coolant temperature sensor and air temperature sensor included in this project. we thought of two ways to test these two sensors by using a heat gun. and also for the convenience of testing these two sensors, we decided to use a potential meter to simulate the temperature changing. As the potential meter is adjusted the resistance value changes correspondingly which changes the signal voltage to the ECU. howevery, the resistance of engine coolant temperatue sensor can goes from 10,000 ohms when it is cold and drops to a few hundred ohms when it is hot. the potential meter we used can only adjust from 1000 ohms to 3000 ohms, this is why when we use scope to test the sensor there is not much change.
No comments:
Post a Comment