The failure protection of the water temperature sensor, the fault code display of the water temperat

When the water temperature sensor fails, the engine computer can't know the temperature of the engine water temperature, so he will keep the fan in a state of constant rotation to prevent the engine water temperature from rising [If there is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, the engine computer will use 80 degrees to control the engine.

At the same time, the cooling fan will enter a failure mode and will continue to rotate at high speed.

Thank you for using, I hope mine can help you, it would be great if I could help you, Car Master specializes in serving car owners, I hope it can help you, thank you for using it again. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Water Temperature Sensor:

Strictly speaking, water temperature sensors are divided into two categories. Either way, it is a thermistor with a resistance between 275 ohms and 6500 ohms. Moreover, the lower the temperature, the higher the resistance, and the higher the temperature, the lower the resistance.

Function: The function of the water temperature sensor is to convert the temperature of the cooling water into an electrical signal

1. Correct the amount of fuel injection; Increase the amount of fuel injected when the temperature is low.

2. Correct the ignition advance angle; At low temperatures, the ignition advance angle is increased, and at high temperatures, it is postponed to prevent deflagration.

3. Affect the idle control valve; At low temperatures, the ECU controls the action of the idle control valve based on the water temperature sensing signal to increase the speed.

4. Affect the EGR valve;

Fault performance: When the water temperature sensor fails, the temperature signal of the hot car is often displayed when the cold car starts, and the ECU can not get the signal of providing an over-concentrated mixture, and can only supply the engine with a thinner mixture (the signal when the car is hot), so the engine is not easy to start when the cold car is cold. In this case, it is necessary to check whether the water temperature sensor plug contact is normal or replace the water temperature sensor.

For example, reading the data of the car's static engine (referring to the cold car) found that the coolant temperature output of the engine ECU was 105, and the actual temperature of the engine at this time (set to the temperature in winter) was only 1, it was obvious that the water temperature signal received by the engine ECU was wrong, indicating that there was a problem with the water temperature sensor.

It should be noted that the sensor is an electronic original device on the automobile circuit, if the device is broken, there is not much room for repair, only to replace. If you want to test it, the simple way is to put the water temperature sensor in the heating cup to heat it (be careful not to submerge the plug part), use the "resistance level" of the multimeter to measure, when the temperature rises, the resistance should become smaller, if there is no change, it proves that the thing is broken.

If this part is to be inspected with a fault diagnosticator, it needs to be detected during the cold run.

The function of the water temperature sensor is to convert the cooling water temperature into an electrical signal, which is input into the ECU

1。correction of fuel injection; Increase the amount of fuel injected when the temperature is low.

2。Correction of ignition advance angle; At low temperatures, the ignition advance angle is increased, and at high temperatures, it is postponed to prevent deflagration.

3.Affects the idle control valve; At low temperatures, the ECU controls the action of the idle control valve based on the water temperature sensing signal to increase the rotational speed.

Hello, the fan is turning at high speed [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, any questions? [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

It will show up if it is usually completely damaged. If there are some water temperature sensors, it is accurate, and if the actual temperature is a few degrees different from the temperature of the disturbing slag, it will not be displayed in the standard range.

But some don't, some just don't show up, some just don't have accurate temperature values.

Nowadays, the car has become a popular tool for our daily travel, but it is inevitable that there will be some problems in the process of use, such as: the failure of the water temperature sensor. Then I will introduce it to you below, I hope you can help.

If the water temperature sensor fails, it will affect the difficulty of starting the car, the weakness of acceleration, and the alarm of the water temperature meter. If the water temperature sensor is faulty, it will affect the power output of the engine.

Most cars use water-cooled engines, which rely on antifreeze to continuously circulate heat in the engine. Antifreeze for water-cooled engines has two circulation paths within the engine, one for a large cycle and one for a small cycle.

As soon as the engine starts, the antifreeze is circulated. At this time, the antifreeze does not dissipate heat through the radiator tank, which is conducive to the rapid warm-up of the engine.

When the engine reaches normal operating temperature, the antifreeze circulates heavily. At this point, the antifreeze will dissipate heat through the radiator, which can keep the engine in the normal operating temperature range.

The water temperature sensor feeds the data back to the ECU, which can adjust the concentration of the mixture based on the water temperature data. If the water temperature sensor is good, it will affect the concentration of the mixture given by the ECU, affect the difficulty of starting the engine, and also affect the power output of the engine.

When the water temperature sensor fails, the rider should replace it immediately.

Car thermostats are also quite prone to malfunction when used for a long time, which may affect the high water temperature of the car.

Hello, this situation needs to see if the water temperature gauge is normal.

There is no problem, the normal cold car has no temperature, of course it is zero degrees, there will be water temperature in a few minutes, when the car stops, turn off the electricity, of course the water temperature meter has returned to 0, because there is water temperature, as soon as the power is turned on, it will reach the normal temperature,

The fault phenomenon of the water temperature sensor is: the indicator pin of the water temperature meter does not move; Fuel consumption increases, idle speed is unstable; It is difficult to accelerate, the accelerator pedal is pressed to the end, and the engine speed cannot go up; It is difficult to start the cold car, and the temperature signal of the hot car will also be displayed when the cold car is started. In these cases, it is necessary to check that the water temperature sensor plug contact is working or to replace the water temperature sensor.

The function of the water temperature sensor is relatively simple, that is, through the change of its internal resistance value, through the change of the sensor to change the electric Zheng Zhongliu to drive the change of the water temperature gauge, and indirectly tell people the working temperature of the engine.

The working principle of the water temperature sensor: the water level sensor in the container transmits the induced water level signal to the controller, and the computer in the controller compares the measured water level signal with the set signal to get a deviation. Then, according to the cautious nature of the deviation, the electric water supply valve is given the command "open" and "closed" to ensure that the container reaches the set water level.

After the water inlet procedure is completed, the computer in the temperature control part sends an "open" command to the electric valve of the ** heat medium, and the system begins to heat the water in the container. When the temperature is set. At this time, the controller issued an order to close the valve and cut off the heat source, and the system shouted that Xiaoshan entered the state of insulation.

During the programming process, it is ensured that when the system does not reach a safe water level, the electric control valve that controls the heat source will not open, avoiding heat loss and accidents.

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