What key does ect on Toyota Camry stand for?

Ect is an engine water temperature sensor.

1, which is used to detect the temperature of engine coolant and convert the temperature signal into an electrical signal and send it to the engine control module (ECU).

2. The interior of the automobile water temperature sensor is the automobile water temperature sensor, and the lower the temperature, the greater the resistance; On the contrary, the smaller the resistance is, it is installed on the water jacket of engine cylinder block or cylinder head and directly contacts with cooling water. So as to measure the temperature of the engine cooling water.

3. The engine coolant temperature sensor signal is used to control ignition timing, injector pulse width and idle stability.

4. According to the coolant temperature, the deflagration sensor, idle air control, heated oxygen sensor and fuel tank ventilation can be started.

Extended data:

Coolant temperature sensor:

It is installed in the water jacket or coolant pipeline of the engine block, which is in contact with the coolant and used to detect the coolant temperature of the engine. After receiving the temperature signal, ECU corrects the fuel injection time and ignition time.

The slender head of the engine coolant temperature sensor is in contact with the coolant, and a thermistor with negative temperature coefficient is installed inside. When the temperature of engine coolant increases gradually, the resistance of thermistor will decrease gradually, and vice versa. Therefore, when the engine coolant temperature changes, the output voltage of the sensor will also change accordingly.

After receiving the signal from the coolant temperature sensor, ECU corrects the fuel injection time and ignition time of the engine.

References:

Baidu encyclopedia-coolant temperature sensor