Coolant temperature sensor for VAZ 2114

What happens if the temperature sensor on a VAZ 2114 does not work? The engine may boil. You are going on vacation outside the city, or to visit your grandmother in the village, or you are stuck in a traffic jam for many hours - in any case, there is a risk of the engine overheating. To recognize this possibility in time, you need to look at the coolant temperature gauge - a special sensor. And it directly depends on the signal that is transmitted from another sensor - a meter for this very temperature. Unfortunately, on any VAZ, including the fourteenth, it is unreliable. Even more sad is the fact of its factory unreliability - they do not always produce a high-quality product in the Russian automobile industry.

DTOZH

Sensor design

The sensor is a thermoelement placed in a bronze shell. It has direct contact with antifreeze, and the thermoelement, which is enclosed in the sensor, changes its resistance as the temperature rises or falls and transmits the received readings to the computer.

The sensor has a threaded connection sealed with a special copper ring; on the top of the sensor there is a connector for connecting a plug.

Breakdowns

The most popular and common breakdowns of DTOZH include:

• Lack of contact with the sensor;
• Break of contact, insulation disappears;
• The device stops working;
• The fan does not turn on when required.

It is also important to examine the signs of trouble. These include:

• The engine has not yet warmed up, but the fan is already starting to work;
• The engine has warmed up, but still does not work properly;
• Fuel consumption has increased significantly.

Temperature sensors

To measure the fluid temperature, two sensors are used, one of them is directly connected to the ECU, and the other to the dashboard. Let's look at each sensor separately.

DTOZH for ECU

This sensor is used only for working with the engine control unit. Measuring the liquid temperature readings, it transmits them to the ECU and, based on the data received, the unit adjusts the air-fuel mixture and also turns on the cooling fan when the liquid temperature reaches a high temperature.

The DTOZH is located in the thermostat housing on a threaded connection.

DTOZH for the dashboard

This sensor is not involved in any operation of the internal combustion engine, but is only informative. This DTOZH is connected to the instrument panel, namely to the liquid temperature scale and measures it only to inform the driver about the state of the internal combustion engine cooling system.

The DTOZH is located in the cylinder head through a threaded connection.

Signs of DTOZH malfunction

The owner can independently determine the need to replace the part. Part failure is accompanied by the following symptoms:

• Increased fuel consumption. Based on incorrect data, the ECU incorrectly selects the ratio of fuel and air mass in the working mixture. A rich mixture with a warm engine leads to increased consumption.
• Engine overheating. Turning on the cooling fan late leads to an increase in the temperature of the liquid in the jacket. When the power unit overheats, metal parts expand, which increases friction between the rotating parts and reduces their service life.

• The engine takes a long time to warm up. The cooling fan operates in advance. The liquid passing through the radiator is constantly cooled. This leads to a decrease in temperature and an increase in the warm-up time of the power unit.

Sensor check

The sensors are checked after its dismantling. To carry out diagnostics, you must have a thermometer and a multimeter.

Let's start checking

• It is necessary to boil water and immerse the thermometer in it.
• Next, set the switch on the device to measure resistance.
• We connect the probes to the sensor and lower the DTOZH into water so that its contacts do not get wet.

• We compare the obtained readings with the table below.

If the parameters do not match, then the sensor is faulty and requires replacement.

How to replace it yourself

Preparatory stage:

• Open-end wrench set to “19”;
• Rags;
• Additional lighting as needed;
• New "measuring device".

Replacement algorithm:

• We install the VAZ 2114 in the perimeter of the repair area;
• We turn off the engine, open the hood;
• We provide priority safety measures: block the rear row of wheels with wheel chocks, squeeze the parking brake;
• Remove the terminals from the DTOZH, unscrew the sensor with a key;
• We replace the device with a new one, screw it in, and put on the power terminals again.

We turn the key in the ignition, activate it, and check the functionality of the equipment. Add the missing amount of antifreeze as needed.

Replacement

Replacing the sensor is not difficult, but you need to prepare a tool. There are two replacement methods: with complete draining of antifreeze and without draining antifreeze. Since the first method is more expensive and time-consuming, we will consider the second without draining the coolant.

Let's get started

Attention!: Work must be carried out on a cool engine to avoid burns!

• We unscrew the cap of the expansion tank to relieve pressure in the SOD and screw it back on.

• We remove the air filter housing by unscrewing the clamp securing the corrugation to the mass air flow sensor, remove the mass air flow sensor chip and unscrew the housing from the car body.

• Remove the connector from the sensor.

• Place a cloth under the thermostat to avoid spilling liquid on the internal combustion engine.

• We prepare a new sensor by placing it on the battery.

• Using an open-end wrench, unscrew the sensor and sharply remove it, plugging the hole in the thermostat with your finger.

• We take a new sensor and install it as quickly as possible so that the liquid does not spill.

• Install the removed parts in reverse order.

• We start the internal combustion engine and check the coolant level, if necessary add antifreeze to the MAX mark.

Does the engine on the VAZ 2114 get hot?

Content:

If the VAZ 2114 coolant temperature sensor stops working. What will happen to your car? That's right, the engine will simply boil. Engine overheating is an extremely undesirable problem that, unfortunately, many motorists face.

Coolant temperature detection element

Moreover, this sensor is inextricably linked with another device - DTOZH (coolant temperature sensor). Its reliability leaves much to be desired.

Where is the coolant temperature sensor located?

There are three types of cooling system on cars:

• Mixed;
• Air;
• Liquid.

In the case of the VAZ 2114, we are dealing with the latest type of cooling system, which runs on liquid antifreeze or antifreeze.

The system itself includes the following components:

• Radiator fan;
• Radiator;
• Cooling radiator;
• Cooling system jacket;
• Pump;
• Expansion tank;
• Connection pipes;
• Coolant temperature sensor.

Breakdowns

The most popular and common breakdowns of DTOZH include:

• Lack of contact with the sensor;
• Break of contact, insulation disappears;
• The device stops working;
• The fan does not turn on when required.

It is also important to examine the signs of trouble. These include:

• The engine has not yet warmed up, but the fan is already starting to work;
• The engine has warmed up, but still does not work properly;
• Fuel consumption has increased significantly.

Sensor check

Your VAZ 2114 engine overheats, or other signs of DTOZh failure appear. This suggests that you should check this element first.

There are two verification methods, each of which we will introduce you to.

First method

Removal

1. Start the car, look at the dashboard. The gauge is at maximum, but the engine is still cold. Disconnect the contacts from the meter. If after this the arrow falls as far as possible, this indicates the need to replace the coolant temperature sensor on the VAZ 2114.
2. If the arrow remains at the top, at the maximum level, take a closer look at the DTOZh contacts. Often they simply short circuit to the vehicle's ground.
3. The engine may heat up normally, evenly, but the gauge needle jumps in different directions. Most likely the fuses have failed.
4. If the fuses are good, close the contact to ground. If the arrow immediately jumps up, then the temperature sensor has failed.

Method two

1. Take a multimeter and turn it on in ohmmeter mode.
2. Arm yourself with a thermometer with notches over 100 degrees Celsius.
3. Prepare heat-resistant containers that will not deform due to hot coolant.
4. Connect the probes of the device to the sensor terminal and the housing.
5. Having connected the DTOZH, place it in a container with coolant and begin heating.
6. Monitor the ohmmeter and thermometer readings at the same time.

The table shows readings that correspond to a working, serviceable sensor. Using this method, you can check the condition of the new sensor before installing it in place of the old one.

Procedure for removing DTOZH

Twisting

You understand perfectly well that the coolant is called that for a reason. And if antifreeze boils in the expansion tank of a VAZ 2114, can this be considered normal? Not at all. It is not uncommon that the problem lies precisely in a faulty DVT.

To replace it, you need to perform several sequential steps.

1. Drain the coolant. To do this: Wait until the engine has cooled down if you have just driven into the garage;
2. Arm yourself with ring wrenches for 17, 13 and 8;
3. Take a container into which the coolant will be drained;
4. Remove the engine protection, disconnect the radiator fasteners;
5. Turn on the stove to maximum mode and open the heater tap along with the expansion tank cap;
6. Place a container under the radiator and very carefully begin to unscrew the drain plug. High pressure releases antifreeze from the expansion tank of the VAZ 2114, so you need to act slowly;
7. Over the course of 10 minutes, the liquid will gradually drain;
8. At this time, go to the engine, place the same container under it and unscrew the plug from the cylinder block, which is located directly under the ignition module;
9. You will have to wait about 10 more minutes for the liquid to drain out.

Now removes the old coolant temperature sensor:

Find it on your car;

Look at the body, pay attention to the markings on one side of the hexagon. Remember the position so that when reassembling everything, do it the same way;

The meter is dismantled using a 21 key;

A new meter is being installed.

We install a new device. For this:

We purchase a new TOZh sensor;

Using the same 21 key, we mount it in place of the old one;

We take into account the previously remembered markings and install the new sensor in a similar position;

We apply a little heat sealant to the threads, which will ensure a high-quality connection;

Coolant is refilled into the heating system and cylinder block. Just use a new one, even if the old one is in good condition. Look at the coolant level sensor on the VAZ 2114 to make sure the tank is full.

If after these manipulations the DTOZH still does not work, pay attention to several points:

1. You may have screwed the new sensor into its seat poorly;
2. It is possible that you forgot to fill the coolant;
3. A leak of cooling liquid formed in the system, the generator was splashed with it;
4. The new sensor could be defective. In this case, it is recommended to always leave the purchase receipt until you are sure that the sensor is working properly. Unfortunately, it is impossible to verify this on site.

Not all issues can be resolved on your own, no matter how experienced an auto mechanic you are. Sometimes you have to go to a service station. But here, too, you must be sure that the specialists are competent, their equipment is in good working order, and they have enough experience in order to efficiently solve the problem that you and your car have. Make good friends at car repair shops. Even if you visit them once a year.

If the VAZ 2114 coolant temperature sensor stops working. What will happen to your car? That's right, the engine will simply boil. Engine overheating is an extremely undesirable problem that, unfortunately, many motorists face.

Coolant temperature detection element

Moreover, this sensor is inextricably linked with another device - DTOZH (coolant temperature sensor) . Its reliability leaves much to be desired.

Thermostat operating principle

The main purpose of the device is to slow down the flow of coolant into the internal combustion engine. By blocking the coolant flow, the engine warms up to operating temperature. As soon as the temperature mark reaches the operating norm, the VAZ 2114 thermostat opens.

On the side that is closer to the internal combustion engine, there is a special wax ball. The waxy material was chosen for a reason, because when heated it transforms from a solid into a liquid. And as soon as the wax begins to transform at a temperature above 83 degrees, it pushes out the pin, which is located in the cylinder. At this time, the valve opens and coolant begins to flow.

Bottom line

Many are inclined to criticize the domestic manufacturer for allegedly assembling buckets on wheels rather than cars. It’s worth arguing with this, because our cars are accessible, easy to drive, inexpensive to maintain, and most importantly, with minimal skills and a couple of keys, you can make repairs yourself.

The owner of a VAZ 2110 can restore order under the hood himself in those cases when the driver of some cool foreign car is forced to take his car to a service station and shell out huge amounts of money for servicing.

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AlertOk.rufacebookVKontakteOdnoklassnikiHow to replace the engine temperature sensor of a VAZ 2114? Taras Kalenyuk Sources used:

• https://vaz-2114.info/gde-nahoditsya-datchik-temperatury-ohlazhdayushhej-zhidkosti-vaz-2114/
• https://provaz2114.ru/elektrika/datchik-temperatury-ohlazhdayushhej-zhidkosti-vaz-2114.html
• https://alertok.ru/oborudovanie/datchiki/kak-zamenit-datchik-temperatury-dvigatelya-vaz-2114.html