Checking and replacing the idle air regulator lada granta

Car : Lada Granta. Asks : Roman Chebotarev. Question : Where is the idle sensor located on a Lada Granta car?

I started the car in the morning, but the engine was running hot. The tachometer needle jumps from 1000 to 1500, and then goes to 500 and the engine stalls. It shakes a lot. I try to apply the gas, to no avail. I went to a car store and they recommended that I pay attention to the idle speed sensor. They said that there are several types, and that I should unscrew the old one and bring it to them. But I don't know where it is. Please tell me where to look for this sensor, under the hood?

Idle speed sensor on Lada Grante: where is it located and how to replace it

The main reason for the unstable operation of the Lada Granta engine at idle is a malfunction of the regulator , throttle position sensor.
Note to the driver!

The Lada family, starting from the Priora, is equipped with an electronic throttle position control system. Previous models used a mechanical type of drive (cable).

Systematic use of equipment leads to wear and unstable operation. The process of self-prevention and replacement is simple, but requires attentiveness on the part of the master.

Using the example of a Lada Granta car, we will consider a step-by-step algorithm for replacing the idle speed sensor.

Review of prices from different manufacturers

*prices are current as of November 3, 2018.

Signs of failure, need to replace IAC, TPS

• Difficulty starting the engine “cold” or “hot”;
• floating idle , unstable engine operation;
• increased fuel consumption;
• the accelerator pedal is uninformative;
• vibration in the car interior, vibration of the steering wheel;
• reduced acceleration dynamics;
• the car stalls when driving downhill;
• when you press the accelerator pedal, periodic dips and speed jumps are noticeable;
• increased consumption at idle.

We perform a diagnostic examination

So, the part has been removed, now you can visually diagnose the problem yourself and determine whether replacement is needed, or whether cleaning will be sufficient. If you do not find any mechanical damage, and the device does not cause suspicion or desire to replace it, then you just need to clean the deposits that have formed. All you need for this manipulation is a (clean) rag and carburetor cleaner. Pour the product into all holes, wipe with a rag and let dry. When the regulator becomes cleaner, inspect it again for mechanical damage.

After cleaning, the IAC must be correctly installed in its rightful place. Everything needs to be done step by step, as during dismantling, but, of course, in the reverse order.

It is important to know that when you install the IAC and start the Lada Priora with 16 valves, the engine speed will immediately reach its highest level. You should not be afraid of this, because the sensor needs to be adjusted to normal operation. When you restart the engine, this will no longer happen, since the IAC will operate in the correct mode for itself.

Causes of breakdowns of idle speed sensors

External air leakage is the first and main reason for unstable operation of the ignition system and fuel equipment. The electronic engine control unit (hereinafter referred to as the ECU), while scanning the readings, “does not know what to do with” the excess air.

The breakdown indicator lights up on the dashboard, the car speed fluctuates, and the air consumption increases.

The second most common reason is systematic jamming of the mechanisms in the ventilation valve. As a result, the tachometer needle shows speeds from 850 to 1250 rpm, and the idle speed is unstable.

Completes the “top three”: a lean mixture entering the cylinders for subsequent ignition.

Sensor

Preparatory stage before installing the idle speed sensor

Necessary tools, materials:

• screwdriver with magnetic tip;
• calipers;
• tester;
• stationery knife;
• torque wrench;
• idle speed controller (hereinafter referred to as IAC);
• throttle position sensor (hereinafter referred to as TPS);
• rags;
• additional lighting;
• liquid for removing deposits and rust WD-40.

Torque

To change the amount of torque, the electronic control unit can change one or more parameters:

• throttle opening angle
• boost pressure (if the engine is turbocharged)
• ignition timing
• fuel injection timing
• turning on/off cylinders

The amount of torque is constantly adjusted and depends on the following factors:

• engine starting conditions
• stable idle speed
• O2 content in exhaust gases
• restrictions on power and number of revolutions
• Automatic transmission (when shifting gears)
• traction control when braking
• forced idle when braking
• equipment operation (climate control, air conditioning)
• cruise control (whether the mode is on)

Sequence of actions when independently replacing IAC and TPS sensors

1. We place the machine on a level platform and ensure priority safety measures during repairs.
2. We open the hood, an air duct with a receiver is laid above the engine. The Lada Granta with 8 and 16 valves has plastic, while in previous Lada models it is aluminum.

Air vent with receiver

1. We press out the plastic clamp of the block with wires.

Plastic retainer

1. Disconnect the contacts of the electronic gas pedal.

Electronic pedal contacts

1. Using a Phillips screwdriver, unscrew the two screws securing the IAC to the throttle body.
2. We remove the IAC from the cavity of the throttle assembly.

Removing the IAC

1. Next, we proceed to unscrew the TPS, it is installed a few centimeters lower.
2. We unscrew the two screws, remove the TPS, and disconnect the block with the wires.

Retrieving the TPS

Note to the driver! When removing the valve, be extremely careful not to lose the rubber bushing.

1. We carry out troubleshooting of the seat of the IAC and TPS. We clean the rust deposits with a rag and use WD-40 aerosol as needed.
2. Screw in each of the sensors one by one and connect the connectors with wires.
3. We start the engine and check the idle speed.

of the idle speed sensor is complete.

Replacing the idle speed sensor

We determine the malfunction ourselves

The regulator is designed to maintain idle speed in a given range and ensure correct and timely warming up of the engine.

Although malfunctions in the functioning of the engine in this mode rarely occur on the Lada Kalina, practice has made it possible to establish a certain set of signs indicating a malfunction of the regulator.

• difficulties starting the unit;
• when the gearbox is in the neutral position, “floating” engine speeds are observed;
• when switching transmission stages on the move, the engine stops without authorization;
• Once the unit begins to warm up at low outside temperatures, the speed is not able to overcome the 1500 per minute mark, which “delays” the time it takes to reach operating temperature.

Observant owners of Lada Kalina testify to a decrease in speed after turning on the air conditioning compressor. This often leads to the engine stopping, and the lubricant pressure symbol in the unit lights up on the instrument panel.

Equipment diagnostics

1. We switch the tester to resistance testing mode (ohmmeter), measure the resistance at the regulator terminals according to the diagram: A - B, C - D. Data in the range from 0.040 to 0.080 Ohm.

1. Using a caliper, measure the distance between the end of the needle and the flange; it should not exceed 23 mm.

Measuring the distance

1. We inspect the mounting socket for each of the sensors, clean it with a rag from dirt and dust.
2. Before installation, lubricate the O-ring with engine oil.
3. We tighten the screws of the regulators with a torque of 3 - 4 Nm.

Addresses of companies providing installation/replacement services (Moscow, St. Petersburg, Kyiv region)

This is interesting: Replacing brake discs and pads Lada Largus

Where is the idle speed sensor on the Lada Granta?

Car : Lada Granta. Asks : Roman Chebotarev. Question : Where is the idle sensor located on a Lada Granta car?

I started the car in the morning, but the engine was running hot. The tachometer needle jumps from 1000 to 1500, and then goes to 500 and the engine stalls. It shakes a lot. I try to apply the gas, to no avail. I went to a car store and they recommended that I pay attention to the idle speed sensor. They said that there are several types, and that I should unscrew the old one and bring it to them. But I don't know where it is. Please tell me where to look for this sensor, under the hood?

Elimination of floating speeds

• heads with a ratchet, and their size should be 6 and 8;

• neutral sealant, when purchasing, pay special attention to ensure that it is odorless;

You need to disconnect and remove the throttle cable stopper from the lever. This work must be done specifically on the throttle assembly. Next you will need to remove the resonator and air pipe. Using TORX T-25 heads and bits that were previously purchased, you need to unscrew the air filter shell. To be able to carry out this work with maximum convenience, you need to remove the wire from the exhaust receiver and all associated fasteners going to the throttle assembly.

Now, having removed the obstacle from the throttle assembly, unscrew all the bolt heads using a ratchet head to do this job. Only after this will it be possible to remove the remote control and remove the rubber rings that serve as a seal at the two ends of the throttle valve. All grooves need to be cleaned as much as possible and the FUM tape should be wound around them in a circle, about 15 times, and on the small pipe - about 10 times.

Only after completing this work can you begin to fully assemble the elements into a single whole. It would also be useful to use a clamp when securing the channel hose and the tube leading to the vacuum booster. This is necessary to further prevent air leaks in the connections.

New Lada: battery charging lamp is on/flashing! — Page 9

To check whether the speed on the Lada Granta is floating, look at the IAC sensor. It is located on the throttle body, therefore, in the same place as the sensor responsible for the throttle position. It is secured with two mounting screws. In order to verify its functionality, one multimeter will be enough.

If the vehicle readings are normal, it should be within approximately 80 ohms. In the same case, if the indicators turned out to be significantly higher than the IAC norm, it will be necessary to replace it.

At the moment when the ignition is turned on directly, the rod located on the regulator fully extends and rests against a specially made calibration hole. It is located directly in the throttle pipe. After this, the sensor begins to count steps until the required time and returns the valve to its original state upon completion of operation.

Location of the idle speed sensor on the Lada Granta

The Lada Granta with an electronic pedal does not have an idle speed sensor! That's why they sent you from the store to remove yours. There is only one idle speed sensor, you can’t go wrong if you have one, of course.

This is what the electronic pedal looks like

Finding out which pedal you have is easy. If you have a throttle cable under the hood, then you have a regular pedal. So, if you do not have an electronic pedal, then the sensor is located on the throttle valve assembly, or rather in its lower part.

Throttle assembly without idle speed control (electronic gas pedal)

To remove it, you must:

1. remove power from the battery;
2. remove the power supply from the idle speed sensor;
3. unscrew the two fastening bolts;
4. remove the idle speed sensor.

In the picture the idle speed sensor is indicated in red, the throttle assembly has also been removed

We diagnose the breakdown

There can be many reasons for a situation where the engine of a Lada Granta starts and immediately stalls. And this is not necessarily the idle speed sensor.

In my experience, I can say that you can still drive an 8-valve Granta with a breakdown of this sensor, since the engine is a “tractor” one. But 16-valve engines will stall, since these are high-revving engines. Therefore, if your 8-valve valve stalls, the reason may not be a breakdown of the idle speed sensor. But if it’s a 16-valve engine, then the symptoms you described are correct. By the way, Lada Prioras behave the same way, they have the same 16-valve valve.

Replacing the idle speed control is not a panacea in the fight against floating speed or a throbbing engine. Most automotive electricians have a tester in their arsenal to check the operation of the regulator. To do this, remove yours and give it for inspection. The regulator glitch may be intermittent, but the tester will show the correct picture.

Recommendations for choosing components

Insufficient driver experience and a wide range of spare parts are the main factors that make it difficult to select and purchase components for the Lada Granta.

Cheapness is the first sign of low quality workmanship.

When purchasing, carefully check the catalog items and search indexes with the actual data specified in the operating instructions. If you do not have experience in servicing equipment, use the services of certified service stations and demand a quality guarantee for the work performed.

Checking and replacing the idle air regulator Lada Granta

Tools:

• Medium Phillips screwdriver
• Tester
• Calipers
• Knife (or scraper)
• Torque wrench

Parts and consumables:

• Idle speed control
• Engine oil
• Regulator O-ring

Notes:

When the engine is idling, the controller controls the air supply using the idle air control (PXX).

The regulator consists of a two-pole stepper motor and a cone valve connected to it. Based on a signal from the electronic engine control unit, the electric motor moves the valve, thereby changing the flow area of ​​the air channel.

The idle air control is non-separable and must be replaced if it fails.

1. Release the wiring harness block clamp.

2. Disconnect the block from the idle air control valve.

How to check TPS

The most convenient way to check the operation of the Niva Chevrolet TPS is by testing . For this you will need a multimeter. The goal is to determine the presence of power at the sensor contacts, measure the voltage and identify the causes of the breakdown. They may be a malfunction of the unit itself, poor contact between the slider and the resistor track, or problems in the vehicle's electrical network.

Availability of "ground"

The purpose of the test is to measure the “negative” power supply, the sensor:

• Disconnect the power cord from the connector.
• Inspect for the presence of dirt , oxidation or mechanical damage.
• Set the multimeter to 20V DC voltage (DCV).
• Turn the ignition key to the ON position (do not start the engine).
• Connect the red probe of the multimeter to the “plus” on the battery.
• Touch each of the three contacts on the wiring connected to the sensor with black.

On one of the contacts the device screen will show a voltage of 12V . This means that there is a ground on the sensor. If power is not displayed on any of them, the reason for the malfunction of the Niva Chevrolet throttle sensor is the absence of a “ground”.

Powered by reference voltage

The purpose of the test is to measure the power supplied to the TPS. The operation of the mechanism will be disrupted if there is insufficient or missing voltage :

• Connect the black probe of the multimeter to ground.
• Turn the ignition key to the ON position. Do not start the engine.
• Connect the red probe to each of the remaining two contacts of the sensor.
• One of them will display a power supply of about five V. The third wire will be the signal wire.

If voltage is not detected on any of the wires , the cause of the Niva Chevrolet TPS malfunction is in the electrical wiring.

Characteristics of sensors

The Lada Granta speed sensor is located on the gearbox housing. This regulator is directly related to the transmission of data about how fast the vehicle is moving, how the car is idling, and what kind of gas mileage it is driving at.

To find this controller on a Priora or Grant, you need to open the hood and remove the air supply hose that goes from the air filter element to the throttle. Having done this, at the bottom of the gearbox housing you can see the controller with a wire connected to it. To replace the device, you simply need to disconnect the wiring and remove it from the installation location, and then replace it with a new one.

Removing DTOZH from a car

A coolant temperature sensor is necessary to measure the temperature of antifreeze in the cooling system. In accordance with the data from the temperature regulator on the Grant, the control unit adjusts the crankshaft speed, adjusts the composition of the combustible mixture, as well as the ignition timing.

As practice shows, such a device rarely fails, but in some cases it can give incorrect readings. Located in the engine compartment, in particular, in the thermostat cover, the controller has its own “diseases”. The wiring at the base of the connector may fray, resulting in the need to replace the DTOZH.

The mass air flow controller is located behind the air filter element of the power unit, it is also often called a flow meter. The main purpose of the device is to monitor the volume of air flow that enters the vehicle engine. In accordance with the data received, the on-board computer determines the required volume of gasoline, which is necessary to maintain a normal air-fuel ratio.

The idle speed sensor is one of the regulators designed to monitor and control the operation of the power unit. If the device breaks down, the motor immediately begins to work incorrectly - it will trip and the power will decrease. In turn, the needle on the tachometer will jump sharply from one value to another. The element itself is located on the throttle, in particular on its lower part. To get to it, you need to free the throttle valve from the pipes, there are four in total.

To replace and install a new IAC, you will need to disconnect the wiring from the regulator itself, as well as the throttle position controller. More detailed instructions for replacing the controller yourself are given in the video below (the author of the video is the channel In Sandro's Garage).

As for the light sensor, it is installed in the same housing with the rain regulator. Its purpose is to activate and deactivate lighting based on the current state. For example, if it gets dark outside or you enter a garage or poorly lit tunnel, the device should automatically turn on the headlights along with the side lights. The controller itself is not repairable, so if it fails, the only option is to replace it.

What to choose?

When replacing, many more or less experienced car owners have a question about which regulator is better to install. After all, there are two types. Sensor type

Peculiarities

These sensors are usually factory installed. The service life of such a throttle position sensor is stated to be about 55 thousand kilometers, but in practice it has to be changed more often

The operation of such a device is based on the magnetic-resistive phenomenon; a Hall element is used. The cost is noticeably higher than the first option, but it is unlikely to have to be changed. Huge resource, high reliability

In pursuit of savings, many forget about the importance of quality. But it should be in the first place when choosing spare parts when repairing a car.

TPS is an important, but easy to replace device. The repair operation will take you no more than an hour, even if you are just beginning to learn the joys of repairing your car yourself.

But under no circumstances delay repairing the sensor, otherwise this may negatively affect the operation of the engine, its service life and the cost of fuel, which you will overuse due to incorrect data from the sensor to the ECU.

Useful for car enthusiasts - everything about cars

Location of the idle speed sensor on the Lada Granta

The following two tabs change content below.

Lada expert An expert on Lada cars with many years of experience. I own a Lada Granta car, I collect cramps based on the Priora. Sometimes I stay overnight in the garage. My wife is more jealous of cars than of women.

The Lada Granta with an electronic pedal does not have an idle speed sensor! That's why they sent you from the store to remove yours. There is only one idle speed sensor, you can’t go wrong if you have one, of course.

This is what the electronic pedal looks like

Finding out which pedal you have is easy. If you have a throttle cable under the hood, then you have a regular pedal. So, if you do not have an electronic pedal, then the sensor is located on the throttle valve assembly, or rather in its lower part.

Throttle assembly without idle speed control (electronic gas pedal)

To remove it, you must:

1. remove power from the battery;
2. remove the power supply from the idle speed sensor;
3. unscrew the two fastening bolts;
4. remove the idle speed sensor.

In the picture the idle speed sensor is indicated in red, the throttle assembly has also been removed

We diagnose the breakdown

There can be many reasons for a situation where the engine of a Lada Granta starts and immediately stalls. And this is not necessarily the idle speed sensor.

In my experience, I can say that you can still drive an 8-valve Granta with a breakdown of this sensor, since the engine is a “tractor” one. But 16-valve engines will stall, since these are high-revving engines. Therefore, if your 8-valve valve stalls, the reason may not be a breakdown of the idle speed sensor. But if it’s a 16-valve engine, then the symptoms you described are correct. By the way, Lada Prioras behave the same way, they have the same 16-valve valve.

Insufficient compression

In addition, do not forget about the possibility of low compression in the cylinders, which is less than 1.0 MPa. To find out the reasons for this phenomenon, it is necessary to disassemble the motor. This will make it clear whether the cylinder head gaskets or pistons have burned out, or whether the piston rings have broken or stuck. Among other things, the cause of such compression may be poor adjustment of the timing valves. If the engine has already covered a sufficient mileage, then we are talking about natural wear and tear on the engine components.

New Lada: LADA Granta maintenance calculator

On an 8-valve Lada Granta engine, it is necessary to measure compression only after adjusting the valves!

The compression on the Lada Granta should be at least 12-13 atmospheres. If it is more, about 15, then most likely it is necessary to replace the oil scraper rings. If the compression is less, the engine is worn out, it needs to be repaired, it will not develop sufficient traction!

Compression gauge - it is used to measure the compression in the engine

So why is this happening

Root causes of problems

The most common situations in which floating speeds occur:

1. Cars with a built-in electronic fuel injection system suffer from such problems much more often than others. And this happens due to the constant suction of excess air, the volume of which still increases, which leads to the formation of a malfunction. The sensor responsible for gasoline injection simultaneously calculates the volume of air entering the cylinders. Based on these and some other indicators of the sensors, the electronic unit opens the electromagnetic injection valves for some time. It follows from this that when there is an excessive amount of air in them, the sensor, which is responsible for the position of the throttle valve, shows the driver that the task assigned to the system is impossible - the check light is on. During this, the temperature sensor indicates that the engine is exiting the warm-up mode. This indicates that it needs less fuel. Just at such a moment, floating speed appears in the car at idle, because the electronic unit does not understand what to do with the accumulated excess air in the system.
2. This reason also partially relates to air suction and occurs mainly on 16-valve engines. The main place where air leaks still occur is the gluing contour of the receiver elements. Even minor damage to this area will lead to unstable operation of the motor.
3. Constant jamming also easily becomes a reason for the occurrence of floating speed. It occurs in the crankcase ventilation valve. Therefore, if the reason is precisely this phenomenon, the systematic operation of the automatic power regulation sensor is disrupted. As a result, the same sensor signals instability of the engine. In a faulty state, the speed ranges from 1,300 to 900 per minute.
4. In models with a carburetor engine, floating speed occurs due to a violation of the control of the servomotor. To correct this problem, simply unscrew the adjustment bolts in the area of ​​the servomotor where the sensor points to the loose drive.
5. Low pressure in the fuel system causes the same problems.
6. Breakdowns in the ignition system are sometimes also classified as causes of floating speed. The problem is primarily related to high-voltage wires and spark plugs. But only with a visual inspection will it be possible to understand whether they are really the problem.
7. A breakdown of the IAC (idle air regulator) causes floating speeds, because it is responsible for their initial stability. The element is inexpensive and can be replaced, so there may not be any significant problems with this.
8. The electronic gas pedal has a lot of disadvantages, especially if tuning the car is only in the process, but the car is actively used. Floating speed is a fairly common occurrence in such a situation.

Cleaning algorithm

Now we will give a step-by-step algorithm for properly cleaning the throttle valve.

• First of all, you need to get to the damper itself. The design is different in different engines. But as a rule, to do this you need to remove the air duct that runs from the damper to the air filter.
• Dismantle the damper. To do this, unscrew several mounting bolts (2-4 pieces), and also disconnect the necessary connectors (for example, the connector from the absorber purge valve).
• To clean, you must use a carburetor cleaner. There is a wide variety of them, and in auto stores you can easily find a product in accordance with your preferences and capabilities (we will talk about them later).
• Using a rag and the mentioned product, you must thoroughly wipe the damper outside and inside.
• You also need to clean the protective grille (if your car has one).
• Assembly of the unit is carried out in the reverse order.

An easy way to clean your throttle body

The correct way to clean the throttle body

How to distinguish counterfeit pxx from the original?

• You should not buy a regulator from the first person you come across. Buy in official VAZ showrooms, in specialized stores, where you will be offered a guarantee and a sales receipt.
• Pay close attention to the appearance of the product and original packaging.
• The absence of the latter is 100% counterfeit.
• Examine the body of the product; there should be no signs of “clumsiness” on it, the rivets on the surface should have heads, the original spring is always black and has fewer turns than on the fake.
• The body of a counterfeit product is most often 1 - 1.5 mm shorter than the original.
• Pay attention to the little things, and you are very likely to purchase an original and high-quality regulator.