How to control the Jetta four wire water temperature sensor

It is a water temperature sensor with four wires, which are the signal fire wire and the iron of the computer.

Temperature is a basic physical quantity, and all processes in nature are closely related to temperature. Temperature sensors are the earliest developed and most widely used type of sensors. The market share of temperature sensors greatly exceeds that of other sensors.

Since the beginning of the 17th century, people have been using temperature for measurement. With the support of semiconductor technology, semiconductor thermocouple sensors, PN junction temperature sensors, and integrated temperature sensors have been developed in this century. Correspondingly, according to the interaction law between waves and matter, acoustic temperature sensors, infrared sensors and microwave sensors have been developed successively.

If two conductors of different materials are connected to each other at a certain point, and the connection point is heated, there will be a potential difference in the part where they are not heated. The value of this potential difference is related to the temperature of the measuring point at the unheated part and the material of the two conductors. This phenomenon can occur over a wide range of temperatures, and if you accurately measure this potential difference and then measure the ambient temperature of the unheated part, you can accurately know the temperature of the heating point.

Since it must have two conductors of different materials, it is called a thermocouple. Thermocouples made of different materials are used in different temperature ranges, and their sensitivity is also different. The sensitivity of a thermocouple is the amount by which the output potential difference changes when the temperature of the heating point changes1.

For most metal-supported thermocouples, this is in the range of 5 to 40 microvolts.

No. 1 and No. 3 are the water temperature sensors used for the water temperature gauge, and the number is blue-brown. Number 3 is black. No. 2 and No. 4 are the water temperature sensors used in the engine control system, the numbers are brown and yellow. No. 4 is brownish-gray. Actually, it's two sensors, packed together.

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No. 1 and No. 3 are the water temperature sensors used for the water temperature gauge, and the number is blue-brown. Number 3 is black. No. 2 and No. 4 are the water temperature sensors used in the engine control system, the numbers are brown and yellow. No. 4 is brownish-gray. Actually, it's two sensors, packed together.

No. 1 and No. 3 are the water temperature sensors G2 for the water temperature meter.

No. 2 and No. 4 are the water temperature sensors G2 for the water temperature meter. Measure the resistance of these two horns with a multimeter. No. 1 and No. 3 are water temperature sensors G62 for the engine control system. It is also a sense resistor. Actually, it's two sensors, installed in one.

The role of the water temperature sensor and the precautions for use:

What the water temperature sensor does:

1. Correct the amount of fuel injection, and increase the amount of fuel injection when the temperature is low.

2. Correct the ignition advance angle, increase the ignition advance angle at low temperature, and postpone it at high temperature to prevent deflagration.

3. Affect the idle control valve, and at low temperature, the ECU controls the action of the idle control valve according to the water temperature sensing signal to improve the speed.

4. Affect the EGR valve.

The four wires of the water temperature sensor are respectively connected to the signal fire wire and the iron of the instrument and the computer.

Position of water temperature sensor: The water temperature sensor is installed on the waterway and water tank of the car, and the temperature control switch is installed below the distributor and on the waterway; Generally, cars have two water temperature sensors, the single-line is the instrument, and the double-wire is to provide data to the computer board to control the fuel injection system and fan.

Water temperature sensor.

It is a thermistor with a negative temperature coefficient, that is to say, if the water temperature of the engine is high, the resistance of the water temperature sensor is small, and if the water temperature of the engine is low, the resistance of the water temperature sensor is large.

EA211 engine water temperature sensor, there are two, there is a G62, in the rear direction of the engine near the water pump. See figure. Hope it helps.

It measures the temperature of the air entering the engine intake manifold. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, the sensor that detects the temperature of the engine intake, the signal is transmitted to the computer to correct the amount of fuel injected [There is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Sensors that detect inlet temperature and pressure [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

I measure the temperature that goes in! It's also one of the fuel injection signals! Thank you [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Inlet air temperature sensor: detect the inlet air temperature and provide it to the ECU as the basis for calculating the air density;

One of the hallmarks of modern automotive technology is the increasing number of components that are electronically controlled. For example, electronically controlled fuel injection, exhaust emissions, anti-lock braking systems, automatic air conditioning, headlight brightness control, automatic driver's seat adjustment, steering control, electronically controlled suspension, and so on. The work of electronic automatic control depends on the information of the sensor, I hope it can help you!

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

No. 1 and No. 3 are the water temperature sensors G2 for the water temperature meter.

No. 2 and No. 4 are the water temperature sensors G2 for the water temperature meter. Use the table of all people.

Measure the resistance of these two horns. No. 1 and No. 3 are water temperature sensors G62 for the engine control system. It is also a sense resistor. Actually, it's two sensors, installed in one.

The role of the water temperature sensor and the precautions for use:

What the water temperature sensor does:

1. Correct the amount of fuel injection, and increase the amount of fuel injection when the temperature is low.

2. Correct the ignition advance angle, increase the ignition advance angle at low temperature, and delay the first code in order to prevent deflagration at high temperature.

3. Shadow mold and sound idle control valve, ECU controls the action of the idle control valve according to the water temperature sensing signal at low temperature to improve the speed.

4. Affect the EGR valve.

No. 1 and No. 3 are the water temperature sensors used for the water temperature gauge, and the number is blue-brown. Number 3 is black. No. 2 and No. 4 are brown and yellow water temperature sensors that are manually removed from the engine control system. No. 4 is brownish-gray. Actually, it's two sensors, packed together.