We check and repair the coolant temperature sensor and other Chevrolet Niva regulators

Niva car engines are equipped with many different controllers and sensors that ensure optimal operation of the unit under any conditions. Accordingly, in order for the motor to work correctly, all sensors must be working. How to check and replace the Chevrolet Niva coolant temperature sensor, DPKV, camshaft controller, speed controller and other regulators? Read about it below.

Temperature sensors used

The Chevrolet Niva has three temperature sensors. Each of them performs its own function. The most important is the coolant temperature sensor. It prevents the engine from overheating, is connected directly to the electronic control unit and controls the operation of the radiator fan.

The operation of the coolant temperature indicator sensor is associated with informing the driver about the thermal state of the engine. The meter slightly duplicates the functions of the DTOZH.

The outside air temperature sensor monitors the state of the environment. It performs the function of a conventional thermometer, displaying data on the liquid crystal screen of the instrument panel.

Location of temperature sensors

The coolant temperature indicator sensor is screwed directly into the hole in the cylinder head. It can be seen if you look at the power plant from the left side.

The DTOZH is located in the coolant outlet line. It is inserted into the front pipe of the water jacket.

To see where the outside air temperature sensor is located, you need to look under the front bumper. The meter is located behind the lower right corner of the license plate. Without removing the bumper, the sensor can be seen through the hole located near it.

Chevrolet Niva coolant temperature sensor: where is it located and how to replace it? | Niva Repair

No comments The coolant temperature sensor is used to monitor the temperature in the internal combustion engine. Long-term operation leads to heating of the motor, which is compensated by a special liquid. The temperature received from the sensor is used to regulate the further operation of the cooling system elements.

Where is the DTOZH of a VAZ engine? The coolant temperature sensor is an electric resistor with a built-in thermometer. It performs the function of a conventional thermometer, displaying data on the liquid crystal screen of the instrument panel.

Location of temperature sensors The sensor for indicating the coolant temperature is screwed directly into the hole in the cylinder head. It can be seen if you look at the power plant from the left side.

When all the tools are at hand, you can begin dismantling: Find the engine sensor and disconnect the connector with the wire. Next, we unscrew it - a nineteen key is ideal for this.

The next step is to lift the block from its mounting socket. After these operations, we need to prepare a container with water that can be heated.

You need to place the removed sensor there and check it. If the motor device is working properly, then when it heats up, the resistance will drop to zero, and when it cools down, it will increase. A wiring harness is connected to the controller; the connector must be disconnected.

Engine management system Niva Chevrolet

The regulator is secured in the seat using two mounting bolts, each of which will need to be unscrewed.

After this, the sensor can be easily removed from its installation location. A foam rubber gasket is installed directly into the groove itself, located on the throttle side. It cannot be lost; during subsequent installation, the regulator ring must be put back in place.

Removing and installing the Chevrolet Niva coolant temperature sensor

Lambda probe The oxygen controller or lambda probe is mounted on the receiving line of the exhaust gas system. These gases, as is known, also contain oxygen, to which the sensor itself reacts, forming a potential difference at the output.

If the fuel mixture used by the engine is too lean, the level of oxygen in the gases will be increased. If it becomes too rich, then there will not be enough oxygen in the air-fuel mixture. You can replace the device at home: Find the regulator on the intake hose of the exhaust gas system. Disconnect the wire connected to it and remove the regulator from the installation location. Install a new one in its place and securely fix the sensor.

MAF The mass air flow sensor or flow meter is used to provide the combustible mixture with the correct proportion of air. If the regulator breaks down, this is fraught with problems such as a drop in power and an increase in fuel consumption, as well as floating speed. The mass air flow sensor is mounted immediately after the air filter element housing, directly in front of the throttle.

When the damper is closed, this parameter is less than 0. The controller itself monitors the voltage indicator, and the fuel supply is adjusted in accordance with the data received. In this case, a lot depends on the position of the damper. TPS does not need adjustment or where the engine temperature sensor is located, since the regulator perceives idle speed as the zero mark.

Fuel level Here everything is more than. The FLS is installed in the gas tank and thanks to it the driver always knows exactly how much fuel is in it and when to refuel. The fuel level sensor transmits a pulse to a sensor located on the vehicle's dashboard.

Temperature sensor Chevrolet Niva

Lambda probe New and old oxygen devices The oxygen sensor is mounted on the receiving line of the exhaust gas system.

The oxygen itself, which is contained in these gases, reacts with the regulator, thereby creating a potential difference at the output.

With a lean mixture, the oxygen content in the gases will be high. For a working sensor it should be 0.55-0.75 kOhm. Install the sensor in the reverse order of removal.

Using a screwdriver or your finger, press out the plastic latch securing the wiring harness block and disconnect the block from the sensor. Loosen the sensor. Unscrew it from the hole in the pipe along with the sealing ring. Check the resistance of the Chevrolet Niva where the engine temperature sensor is located. Removing and installing the Chevrolet Niva throttle position sensor The sensor is installed on the throttle assembly and connected to the throttle axis.

To replace you will need a screwdriver. Move the throttle valve from the fully closed position to the fully open position. For a working sensor, the resistance should change uniformly within the range of 2.7-8.2 kOhm. To replace a faulty sensor, remove the two screws securing the throttle assembly. Remove the sensor.

Please note: Install the new sensor in the reverse order of removal. Removal and Niva Chevrolet where the engine temperature sensor of the mass air flow sensor is located Niva Chevrolet The sensor is installed on the outlet pipe of the air filter.

To replace the Niva Chevrolet air flow meter you will need: Disconnect the wiring harness block from the Niva Chevrolet where the engine temperature sensor is located Loosen the clamp securing the left side of the air supply pipe to the sensor and disconnect it from the sensor Unscrew the two bolts securing the sensor to the air filter cover and remove the sensor together with sealing ring.

Removing and installing a knock sensor Niva Chevrolet The knock sensor is installed on the right side of the engine cylinder block in its upper part, in the area of ​​the second and third cylinders.

To replace the Chevrolet Niva knock sensor you will need: To facilitate access to the sensor, unscrew the bolt of the lower fastening of the front strut of the intake pipe and move the strut to the side Press the spring clamp of the wiring harness block Disconnect the block from the sensor Unscrew the bolt securing the sensor to the cylinder block and remove the sensor Attach to Autotester sensor terminals connected in voltage measurement mode.

Tap the sensor body against a solid, massive object, such as a hammer.

Cost of sensors

Chevrolet Niva temperature sensors, although they are not consumables that require periodic replacement, still have a very low price. This is due to the simplicity of the design and the absence of the use of expensive materials or technologies in manufacturing. More detailed prices for meters are given in the table below.

Table - Cost of Chevrolet Niva temperature sensors

Self-replacement of the temperature indicator sensor

Replacing the coolant temperature gauge sensor on a Chevrolet Niva with your own hands is presented step by step below.

• Disconnect the on-board network.
• Remove the protective cover from the meter.
• Disconnect the terminal from which the sensor wire comes.

• Loosen the meter. To do this, you will need a key “21”.

• Unscrew the loose gauge by hand. Remove the sensor.

• Install the new meter in the reverse order of removal.

Do-it-yourself replacement of the coolant temperature sensor

To replace the coolant temperature sensor, tools are required, which are presented in the table below.

Table - Tools and materials required to replace the coolant temperature sensor

In order to replace the DTOZH on a Chevrolet Niva, it is recommended to use the step-by-step algorithm of the instructions below.

• Work should be carried out with a completely cold engine. Therefore, before proceeding with the replacement, if the vehicle is just after a trip, then it is necessary to wait a time interval sufficient for the power unit to cool down.
• Secure the vehicle using the parking brake.
• Open the hood.
• Disconnect the vehicle's power supply. To do this, you need to remove the negative terminal from the battery.

• For easy access to the temperature meter, it is recommended to remove the decorative protective casing of the power unit and the air filter housing.
• By pressing the clamps, remove the terminal from the coolant temperature sensor.

• Unscrew the meter.
• Remove the DTOZH.
• Install a new sensor.
• Reassemble everything in reverse order.

Common errors and symptoms of malfunction

The temperature sensor operating system is considered reliable due to its simple design. However, during the process of using a car, almost every part wears out.

In the case of DTOZH, the following malfunctions are possible:

• Violation of graduation. Such an error leads to an unplanned change in resistance. Characterized by malfunctions in the operating system of the electronic control unit.
• Wiring oxidation. Occurs due to sudden temperature changes.
• Failure of additional DTOZh sensors.

Symptoms indicating malfunction include the following:

• while driving, the engine speed drops - it may stop at idle;
• the car warms up over a longer period of time than before;
• during operation, the engine often goes beyond the prescribed temperature range;
• fuel consumption increases significantly;
• black smoke comes out of the exhaust pipe;
• the driver loses control of the car.

Although the DTOZH rarely fails, there must be a reason for the breakdown. Most often this happens due to low-quality antifreeze or engine oil. The consequence of such factors is damage to the sensor surface. So buy quality supplies. It could also be due to a manufacturing defect.

Attention! Do not purchase a temperature control device from a flea market or other cheap auto parts markets.

How to check

To carry out the verification procedure you will need the following tools:

• wrench 19;
• multimeter;
• a container for draining the remaining coolant (any bucket or basin not used for food purposes will do);
• kettle (electric) for boiling water;
• thermometer (electronic only);
• separate container for boiling water (small size).

Sequencing:

1. First, dismantle the sensor. Disconnect all the chips with wiring from it and, using a 19mm wrench, unscrew it from the place where the part is located.
2. Pour cold water into the electric kettle. Immerse the working part of the DTOZH there along with the prepared thermometer.
3. Connect a multimeter to the cooling sensor. It will measure and show resistance.
4. Plug in the kettle. Observe changes in the indicators: as the temperature of the liquid increases, the resistance should drop. Moreover, the indicators in each temperature regime are certain.

If the indicators deviate from the norm, then the temperature control device is faulty and must be replaced.

You can check it in another way. It is especially relevant if there is no thermometer available. Subsequence:

1. Put the water in the kettle to warm up. Make sure that the indicator starts to move towards +100°C.
2. Immerse the DTOZH in the liquid with a multimeter.
3. Take a measurement.

The resistance in this case should be equal to 177 (minor decreases or increases are acceptable). Other indicators will indicate malfunction of the device being tested.

Replacing the outside air temperature sensor

You can’t call the ambient air temperature sensor an element of first importance, but it’s still nice how everything in the Chevrolet Niva works like a clock. There is one way to find out about the malfunction of this device for determining air temperature: compare the indicator on the car’s dashboard with another measuring device. But if you are stuck in a traffic jam in the summer, then you don’t have to be surprised when the temperature suddenly creeps up - all the devices are heating up.

Outdoor air sensor location

Also, when parked with the engine running or at low speed, heat affects the air sensor, and in the Niva Chevrolet it is not ventilated, so the data is overestimated.

This device is located at the bottom of the front bumper. If you stand facing the engine, the sensor is located in the bumper behind the lower right corner of the license plate. You can see through the hole in it.

But it won’t be possible to dismantle it right away; before that you need to complete preparatory steps. And we will talk about all this below:

1. It is necessary to disconnect the negative terminal of the battery;
2. Now you need to locate the sensor itself in the bumper holes;
3. Gently pull it - the device itself should come out of the seat;
4. Next you need to get it out, be prepared that it will pull the wire along with it;
5. Replacement occurs as follows: the air sensor is disconnected from the plug by pressing the latch. Pull the plug carefully to avoid damaging fragile parts;
6. Ready. All that remains is to install a new part; you can buy it at a car dealership or service center. As reviews say, non-standard devices can also be suitable for the Niva Chevrolet, but it is preferable to take original parts for the car;
7. Installation proceeds in reverse order. Do not forget to check the operation of the systems after replacement.

Shniva without bumper with sensor

Replacing the engine temperature sensor: instructions

The Niva Chevrolet power unit also has electronic control devices. One of them is the engine coolant temperature sensor. It can also fail, which can lead to more serious consequences. To dismantle the old one, we need to follow several steps. The engine monitoring device is located on the cylinder head. This is a one-piece housing, inside of which a special sensitive element is installed. Depending on the environment, the current strength in the power circuit changes in the sensitive element. With this action, the electronics transmits information to the Niva Chevrolet dashboard.

It is impossible to repair the engine electronics, since they are not designed for this. If a malfunction occurs, you need to remove and check the testing element. If the malfunction is confirmed, then you can proceed with replacement. To dismantle this mechanism, you will need a standard repair kit consisting of screwdrivers, zip ties and keys. When all the tools are at hand, you can begin dismantling:

Errors

During operation, the machine gradually wears out. The owner notices various signs, but does not always determine the cause. Temperature sensor problems are usually caused by:

• breakdown of the engine temperature indicator on the dashboard;
• refrigerant leak from a part;
• inaccurate fan startup or failure to start for various reasons.

The appearance of these factors is a reason to check the DTOZH for performance.

Attention! If you ignore the malfunctions, the following problems may occur:

1. Failure of the internal combustion engine control unit due to an incorrect signal that the sensor transmits to the computer. In hot weather, the control system may not turn on the fan, which will lead to boiling. 2. The malfunction also disrupts engine performance and driving dynamics.

Replacing the ambient air temperature sensor Niva Chevrolet (VAZ)

High, low, engine speeds fluctuate. Mass air flow sensor, DBP+DTV, Air leak. Troubles the engine 2h

The control unit uses data received from the mass air flow sensor to determine the duration of the injector opening signal.

There is an air temperature sensor. It seems to show normally as long as the car is cold. Damn, I can’t believe that...

Each Niva Chevrolet sensor helps evaluate the values ​​of non-electrical parameters and helps convert them into an electrical signal, which is formatted into a special digital code.

And we will talk about all this below:

We will tell you more about this below.

Its purpose is to synchronize the operation of the controller with the TDC of the first and fourth cylinders with the angular position of the shaft. As for the disk, it is a toothed pulley equipped with 58 cavities spaced six degrees apart.

This allows 60 teeth to be installed on the shaft, however, two teeth were removed in order to create a synchronization signal, without this it is impossible to match the regulator with TDC on the first and fourth cylinders.

As the crankshaft rotates, the teeth change the governor's magnetic field, thereby converting AC signals. It should be noted that between the main elements - the position sensor core, as well as the pulley tooth - there should be a gap of about 1 mm. Based on the information received from the position sensor, the control unit allows you to identify the required rotation parameter and send a signal to the injectors. The regulator is mounted in the antifreeze outlet pipe on the cylinder head.

Self-diagnosis Niva Chevrolet, replacing the idle speed sensor

When the air temperature outside is sub-zero, the regulator has an increased resistance; at 40 degrees cold it will be kOhm. If the internal combustion engine warms up to degrees, this indicator will be reduced - about Ohm.

The part calculates the temperature itself based on the reduction in voltage on the device. On an unheated power unit, the voltage drop will be increased, and on a warmed-up internal combustion engine, it will be low. Simply put, it informs the location of the piston of the internal combustion engine cylinder, while all cylinder stroke cycles occur sequentially.

-30 on the on-board computer, outside temperature sensor

If it stops working, the device and indicator turn on, thanks to which a mixture of air and fuel occurs, dosing is suspended and the reserve mode is activated. Temperature The Niva Chevrolet temperature sensor helps determine the ambient air temperature.

Located on the lower part of the bumper on the driver's side. We disconnect the battery. We carefully pull it out of its seat. We pull it out. By pressing the latch, we disconnect the plug from it. We install a new one in the reverse order. Air flow The air flow of the Chevrolet Niva is controlled using a hot-wire type sensor, which is located between the hose of the intake tube and the air filter.

We check and repair the coolant temperature sensor and other Chevrolet Niva regulators

Niva car engines are equipped with many different controllers and sensors that ensure optimal operation of the unit under any conditions. Accordingly, in order for the motor to work correctly, all sensors must be working. How to check and replace the Chevrolet Niva coolant temperature sensor, DPKV, camshaft controller, speed controller and other regulators? Read about it below.

Guide to checking and replacing the sensor

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Guide to checking and replacing the sensor

How to check the throttle position sensor, fan activation, air flow and other controllers on a Niva Chevy? What are their signs of malfunction and how to replace them if necessary? We suggest that you familiarize yourself with the purpose and replacement of devices in detail.

The coolant temperature controller is also considered an engine temperature sensor. This device is a resistor whose resistance value changes in accordance with the temperature of the consumable. If you are wondering where the DTOZH is located, it is located on the coolant exhaust line, directly on the cylinder head. If the air temperature outside is negative, the resistance of the sensor will be increased - at 40 degrees below zero this figure will be about 100 kOhm. When the motor warms up to operating temperature, the resistance will drop to 177 Ohms.

When the device fails, the dashboard will display incorrect readings regarding engine temperature. For example, the pointer needle may not rise at all, sometimes it stops in the middle of the scale.

To diagnose and replace the DTOZh, follow these steps:

1. To begin, prepare a thermometer that can operate at high temperatures, a multimeter for testing, and a container of liquid that you will heat on the stove.
2. Remove the sensor itself from the socket, having first disconnected the connector and placed a container under the location, since some of the antifreeze may come out during removal. Disconnect the connector and unscrew the device; temporarily install a plug in its place.
3. Place the sensor in a container with water prepared in advance, only lower the part of the controller that was screwed into the cylinder head into the liquid. Measure the resistance and turn on the kitchen burner to heat the water.
4. As the temperature increases, the resistance will drop. Measure this parameter several times at different temperatures, then compare the obtained data with the normalized ones indicated in the table in the service book. If the data is very different, replace the device with a new one.

Detonation

A knock sensor is used to detect vibrations or shocks present in the operation of a car engine. This device is mounted on the top of the block head, and the device is based on a special piezo plate used as a sensitive component. If the sensor detects detonation while the car’s engine is running, then special pulses begin to form at its output, which will increase with the increase in detonation. In accordance with these signals, the engine control unit automatically adjusts the ignition until the number of detonation flashes is reduced to a minimum.

If the controller breaks down, the engine will detonate, especially when the speed increases in a lower gear. If you check the ignition, you will find that everything is set correctly and there is no need to adjust the timing.