The steering wheel is on with an exclamation mark on a Priora

Electric power steering

This device increases the force that is transmitted in the steering system. Simply put, you can turn the steering wheel with two fingers. Previously, VAZ models were equipped with hydraulic boosters (power steering), but starting with the Lada Kalina they were abandoned.

The EUR was developed. In terms of force transmission power, power steering is preferable, however, it has many disadvantages:

Engine power take-off.
Constant monitoring of the level in the tank is necessary.
Checking oil lines.

The electric amplifier is devoid of all these disadvantages. And it is even easier to repair than power steering. But it also has its own faults.

EUR device

Main components of an electric amplifier:

Mechanical part.
Electrical component.
Electronic control unit (ECU) with peripherals.

The mechanical part includes the actual steering parts, connecting parts and mounting hardware. That is, the input and output shafts, bracket, nuts, bolts, studs and springs. Well, there’s also an adjustment lever for changing the angle of the steering wheel.

Electric, actually the amplifier motor itself. The most vulnerable is the electronic component. ECU and connectors with sensors.

Methods for determining EUR malfunction

Well, of course, the first sign of a breakdown in the system is the activation of the ECU warning light on the instrument panel. Usually on a standard one, this is an icon in the shape of a steering wheel with an exclamation mark. When you turn on the ignition, it lights up for a few seconds, and then, if the computer decides that everything is in order, the light goes out. And accordingly, when a breakdown of the Priora’s electric amplifier is detected, it lights up and remains on.

So, carry out computer diagnostics, contact the ECU, get error codes with or without decoding. Even if the scanner only produces codes, it’s not scary. You can just know that faults associated with the Priora ESD begin with the symbol “C”. For example, C1013, means that the voltage in the network is low, and this is not enough for the electric amplifier.

Well, there may be several options. The most common case is the weakening or burning of one of the two power wires going to the EUR. These are red and black wires, large cross-section, included in a separate connector on the device. They are quite easy to check. It could also be a large fuse for the device, everything is clear here. Well, the third reason is a deficiency in the car’s network, for example, a weak or faulty battery or generator. In case of such a malfunction, contact a specialist, and nothing else. To an auto electrician.

“Folk” method of checking a malfunction, or “control”

Well, if the indicator does not light up, and there are doubts about the serviceability or malfunctions of the Priora ESD, or after repairs you need to do a “check,” proceed as follows: you need to turn the steering wheel without turning on the ignition. Remember the effort. And repeat the operation by starting the engine. If there are no changes, something happened to the Priora EUR!

What malfunctions exist in the Priora electric booster?

And again the same list, mechanics, electrical, electronics. Well, everything is clear with mechanics, this is a failure of shafts, connections and fittings. With this malfunction, the wheels simply will not respond to the steering wheel turning. And this problem is easiest to fix. But with other faults it is much more complicated. If the malfunctions are related to the failure of the servomotor, amplifier, or Priora itself, there is no point in thinking about repairs. It’s easier to buy a new EUR at the store and replace it yourself. Or take it to a service center and try to repair it there. If the connection with the Priora ESD ECU is lost, then this is most likely the second connector, with a trail of wires, the same is true if the unit does not receive a signal from external sensors - the crankshaft and camshaft. Yes, yes, they are also important for the operation of the device. In these cases, an inexpensive bundle of wires can be removed and repaired, or replaced.

What remains is the “brain” of the electric amplifier, and the internal position sensors of the unit’s shafts. Messing with sensors is not an option, only repair service. But the computer itself, if it malfunctions, you can buy and replace yourself.

Reasons for low level

A low brake fluid level may occur due to a brake fluid leak. It is necessary to check the entire brake system for leaks; if any are found, fix them immediately.

It should also be noted that low fluid levels can be observed due to worn brake pads. This is explained by the fact that the thickness of the pad becomes smaller and the caliper piston extends further, therefore, the fluid level in the reservoir decreases. After replacing the pads, the level will be restored to its original position.

If the pads in your car are worn out, you can read how to replace them yourself here.

Non-mechanical reasons for the indicator to turn on

If everything is in order with the car, there are no leaks and the pads are normal, then most likely the reason is in the electrical wiring or the brake fluid level sensor.

To check the functionality of the sensor, you need to unscrew it and forcefully lift the sensor ring up. If the lamp does not go out, then there is a breakdown in the sensor.

Checking the electrical wiring of the sensor is carried out by closing its contacts on the connector. We take out the chip from the brake fluid level sensor and insert a jumper into it; if the lamp lights up, then the electrical wiring is intact.

After reading this article, you can easily figure out the reason for the low brake fluid level indicator to light up and localize the problem.

Removal and installation

This is not such a complicated procedure as it might seem. And it even requires very few tools:

Socket wrench for 8.
A socket with a knob, or a 13mm socket wrench.
Figured (phillips) screwdriver.

And nothing more than the ability to use them. This is provided that the steering wheel itself has already been removed, which is a different story.

Well, now go ahead. Remove the plastic covers from the steering column by unscrewing 2 screws and unfastening 2 fasteners. Using a screwdriver, unscrew the four bolts and separate the lower part of the lining. Now the lock and the “helicopter” - the turn switches and wipers - are in the way. First of all, pressing the antennae on the connectors, disconnect all the wires. Then, using a size 8 wrench, loosen the clamp that attaches these devices, after which they will freely come off the shaft casing.

Disconnect the two connectors from the ESD ECU. Remove the plastic cover from the special pin.

Do not unscrew the lower nuts completely, but turn them a few turns with a number 13 wrench. But pull out the coupling bolt of the intermediate shaft hinges completely, unscrewing its nut by 13. Well, there you go. Having unscrewed all the fastening nuts, you can remove the faulty Priora EUR. Using a 13 key, release the lower shaft of the device from the splined joint. OK it's all over Now. You can try to fix the malfunctions described above yourself, take it to a workshop, or simply install a new unit on your Priora, proceeding in the reverse order.

Useful video on general repair of Priora electric power steering:

Source: mashintop.ru

Lada Priora: EUR, faults and repair of electric amplifier

Electric power steering (EPS) is a more modern alternative to the traditional power steering system. On the one hand, the electric amplifier does have a number of certain advantages, but the system is still not without its drawbacks. Moreover, on budget cars (including Lada Priora), ESD malfunctions can appear even at low mileage.

In such a situation, it is important to know what signs indicate that the Priora electric booster needs diagnostics, as well as what malfunctions may occur, and how to identify and repair the breakdown. Next, we will look at what breakdowns are typical for the Priora ESD, as well as how the Lada Priora electric power steering is repaired.

Why is the exclamation mark on the instrument panel of the Lada Priora and what to do?

The instrument panel of the Lada Priora contains numerous elements, without which the car simply cannot function normally, show the serviceability of systems, or warn the driver about breakdowns. It is on the panel that you will find:

car speedometer and tachometer;
on-board computer indicator;
numerous light bulbs.

If one of the lights lights up, then this, of course, indicates a breakdown. With the help of a certain icon, it is quite easy for experienced drivers to determine which automotive component needs repair. In the meantime, it is best for inexperienced car owners to familiarize themselves with each element located on the instrument panel in order to promptly eliminate the cause of the breakdown with their own hands. The information in this article and advice from professionals will help car owners familiarize themselves with the dashboard and understand why a particular light on the panel may light up.

Electric power steering Lada Priora: power steering device and operating principle

So, electric power steering provides the necessary ease when turning the steering wheel at a standstill or in motion. The mechanism creates a force that is transmitted to the steering system.

At the same time, unlike the power steering, the power steering amplifier does not take away engine power, does not require a complex system for pumping hydraulic fluid under high pressure, is less noisy, does not leak, and theoretically should be more reliable.

Let's start with the EUR device. The main components of electric power steering can be divided into three groups:

Mechanics;
electrician;
control electronics;

The mechanics actually represent the steering elements (for example, input and output shaft, etc.). Electrics involves an electric amplifier motor, leads, terminals, contacts. The electronics includes an EUR control unit (EUR ECU), a group of EUR sensors, and connectors. Taken together, the Priora steering rack with electric power steering is designed so that the electric motor can create force. At the same time, the “weakest” part is considered to be the electronics, and not the mechanical part.

As for the operating principle of the EUR, it is quite simple. When the driver turns the steering wheel, sensors record the rotation of the steering shaft, after which the electric motor is connected, which creates the necessary additional force. It would seem that the solution is simple and reliable, but this is not entirely true.

Diagnosis of EUR malfunction

First of all, the main symptom of a malfunction appears in the form of a steering wheel icon with an exclamation mark on the Priora’s instrument panel. In this way, the ECU notifies the driver of problems with the power steering.

Normally, when the ignition is turned on, this icon lights up for a while and then goes out. However, if the system is faulty, the icon indicating that the Priora's electric booster is faulty will be constantly on.

As for the most common problems, the EUR power wires (red and black) may become loose or burnt. The power steering fuse also often fails. By the way, voltage drops may not be related to the amplifier. In this case, you need to check the condition of the battery and the functionality of the generator.

Warning icons on the panel

The steering wheel icon can light up in two colors. If the yellow steering wheel is on, then adaptation is required, and when a red image of the steering wheel with an exclamation mark appears, you should already be concerned about the failure of the power steering or power steering system. When the red steering wheel lights up, your steering wheel will probably become very difficult to turn.

The immobilizer icon usually blinks if the car is locked; in this case, the indicator of a red car with a white key signals the operation of the anti-theft system. But there are 3 main reasons if the immo light is constantly on: the immobilizer is not activated, if the tag on the key is not read or the anti-theft system is faulty.

The handbrake icon lights up not only when the handbrake lever is activated (raised), but also in cases where the brake pads are worn out or the brake fluid needs to be topped up/replaced. On a car with an electronic handbrake, the parking brake light may come on due to a glitch in the limit switch or sensor.

The coolant icon has several options and depending on which one is lit, draw conclusions about the problem accordingly. One red lamp with a thermometer scale indicates an increased temperature in the engine cooling system, but a yellow expansion tank with waves indicates a low coolant level in the system. But it is worth considering that the coolant lamp does not always light up at a low level; perhaps there is simply a glitch in the sensor or float in the expansion tank.

The washer icon indicates a low fluid level in the windshield washer reservoir. Such an indicator lights up not only when the level actually decreases, but also if the level sensor is clogged (the sensor contacts become coated due to poor-quality liquid), giving a false signal. On some vehicles, the level sensor is triggered when the washer fluid does not meet specifications.

The ASR icon is an Anti-Spin Regulation indicator. The electronic unit of this system works in tandem with ABS sensors. When such a light is constantly on, it means the ASR is not working. On different cars, such an icon may look different, but often in the form of an exclamation mark in a triangle with an arrow around it or the inscription itself, or in the form of a car on a slippery road.

The catalyst icon often lights up when the catalytic element overheats and is quite often accompanied by a sharp drop in engine power. Such overheating can occur not only due to poor cell throughput, but also if problems arise in the ignition system. When the catalyst fails, high fuel consumption will be added to the burning light.

The exhaust gases icon , according to information from the manual, indicates a malfunction in the exhaust gas purification system, but, as a rule, such a light starts to light after poor refueling or the presence of an error in the lambda probe sensor. The system registers misfires of the mixture, as a result of which the content of harmful substances in the exhaust gases increases and, as a result, the “exhaust gases” light comes on on the dashboard. The problem is not critical, but diagnostics are worth doing to find out the cause.

Frequent electric power steering malfunctions and repairs

Once you are convinced that the ESD does not work fully or partially, you must stop using the vehicle. Next, you should check and try to more accurately determine and localize the fault. There are many possible reasons for this.

The total cost of repairs will also depend on the nature of the damage. In some cases, a new steering rack on a Priora is needed, while in others it is enough to inspect the connectors or contacts.

Let us also add that usually in terms of mechanics, failure of shafts, connections and other elements may occur. Electrically, cases of failure of the Priora power steering servomotor are not uncommon. In this case, it is better to abandon attempts to repair it and immediately buy a new EUR.

There is also a situation when the EUR unit cannot communicate with the vehicle's ECU. In this case, connector 2 with a cable of wires often fails. Also, the signal may not reach the unit from external sensors DPKV and DPRV, and this problem has a direct impact on the EUR.

In parallel, in the list of problems it is worth highlighting problems with the electric booster unit itself, as well as shaft position sensors. It is better to change the sensors immediately; it is also recommended to replace the control unit. If you have the tools, you can change many components of the electric power steering with your own hands in a regular garage.

How to replace electric power steering on a Priora

Often, owners buy an EUR for a Priora and change the faulty elements of the amplifier themselves. At the same time, the Priora steering rack with electric steering is not in the most accessible place, however, all the work can be done with your own hands, since, unlike the power steering, you do not have to work with the rack itself.

To replace the EUR on a Priora, you must have a socket wrench 8, a head with a wrench, or a socket wrench 13. You will also need a cross-head screwdriver. You will also need separate tools to remove the steering wheel itself. It is advisable to have a puller or separately study the material on how to remove the steering wheel on a Priora.

So, when the steering wheel is removed, you need to disconnect the battery (if this was not done while removing the steering wheel). It is enough to remove the “+” terminal from the battery. Next, remove the plastic covers from the steering column (unscrew a couple of screws and unclip a couple of clips).

Let's sum it up

As you can see, the Priora EUR itself is not a complex design, which somewhat simplifies the process of replacing individual system components. However, the active use of electronics reduces the reliability of such a system as a whole. In practice, more often than not, malfunctions of the electric power steering occur not due to mechanical breakdowns, but as a result of problems with connectors, sensors, contacts, wiring, control modules, etc.

In any case, with regard to ESD, it is necessary to start with computer diagnostics, and only then move on to an in-depth check of all system components individually.

For this reason, the power steering, regardless of type, must be periodically checked and serviced (in the case of power steering, you need to monitor the tightness and change the power steering oil; in the case of power steering, at least in-depth diagnostics should be performed). This approach makes it possible to increase the service life of the system and also avoid unexpected breakdowns of the vehicle's power steering.

Source: krutimotor.ru

Causes of failure of the electric power steering on the Lada Kalina

For the first time, the Russian auto industry installed electric power steering on Kalina. At the first stages, it worked extremely unstably, up to a complete shutdown. Later, they tried to eliminate the shortcomings, but the EUR remained a weak link and periodically fails, as evidenced by the exclamation mark on the panel. This is evidenced by the feeling of a heavy steering wheel, and turning with one hand becomes difficult.

The principle of operation of the electric booster is to reduce the force that needs to be applied when turning the steering wheel. The Kalina electric power steering control unit uses sensors to calculate the operation of the electric motor at the current speed and torque. Thereby giving a signal of the effort with which the driver needs to be helped when turning. After all, it does not work constantly and needs adjustment, which is carried out by the block.

What does it mean

This sign informs the driver that the brake fluid level is low. If it is detected on the panel, it is recommended to immediately stop and check the brake fluid level in the reservoir. It must be no lower than the MIN mark; otherwise, it is recommended to top up the fuel fluid and check the brake line for fluid leaks.

TJ has good fluidity and is able to seep where water will not leak. Continuing to drive with leaking brake fluid is unsafe and PROHIBITED!

Reasons for shutdown

The main reason lies in the electric power steering. When ignited, the system performs a self-diagnosis and if the mechanism does not pass it, a signal is turned on indicating a malfunction. The color of the signal indicates the degree of danger. The light turns red, the problem needs to be fixed urgently. If the color is yellow, the vehicle can be operated, but safety precautions should be taken. There may be several reasons why the electric power steering on Kalina does not work:

speed sensor malfunction;
torque sensor malfunction;
speed exceeds 60 km/h;
engine speed is less than 400 per minute;
failure in the control unit;
poorly soldered contacts;
insufficient tension.

Software shutdown

The electric power steering on Kalina turns off after 60 km/h. Therefore, keep this point in mind; it is set in the system unit and is not a breakdown. The Priora's electric power steering is switched off at a speed of 110 km/h.
Also, the EUR does not work at low engine speeds. If the value is less than 400 rpm, it is not active.

This is software planned inactivity. It is needed to give information to the steering wheel at high speed and reduce wear of the mechanism.

Electrical booster malfunctions

In the event that it is impossible to immediately check the cause of failure of the electric power steering on Kalina, you need to remove the fuse from the block. This is necessary to prevent sudden activation of the mechanism, which leads to emergency situations.

A direct indicator of a malfunction of the speed sensor in Kalina's electric power steering is a non-working speedometer, as well as a lit-up exclamation mark on the dashboard. It may not work for several reasons. Check the appearance of the sensor; if it is covered with dirt, simply clean it. See if any metal shavings have become magnetized and remove those as well.

If this does not help, then the sensor is probably faulty. Such sensors are now inexpensive and can be found in many auto parts stores. We do the same for the torque sensor. But where is the speed sensor? It is usually located in the gearbox housing, see photo on the left.

Another cause of malfunction of Kalina’s electric power steering is the generator. The control unit requires a voltage of 13.6 V to operate; if you have less, change the voltage regulator (chocolate) on it.

Also, the contacts could simply become disconnected due to poor-quality soldering. You can either disassemble and solder the contacts or send it to service.

If the problem is in the control unit, it is difficult to solve this problem yourself; the service will either solder it or you will have to buy a new one.

In what cases is it necessary to remove the instrument panel?

Dismantling the Priora tidy is required for tuning or replacing burnt out lamps. The VAZ 2170 is a modern model, so there are not many fastenings on the panel. To disassemble you will need a set of screwdrivers. Don't forget to turn off the negative battery.

The process begins with removing the mounting block. To do this, you need to turn the latches on the fuse cover and then remove it;

Priora has several panels, depending on the year of manufacture, plus non-standard ones made specifically for it

Everyone knows how important it is to know the instantaneous status of instruments and machine parameters

The panel, also known as the control panel, on a Lada Priora car is, in fact, brief information about the condition of the car at the moment. It contains all the basic information, from movement speed to indicator readings on malfunctions of the main units and components of the machine. When something in it doesn’t work, it’s immediately alarming, because it’s current information. A description of all the icons and their meaning can be found below in the article. Technology is gradually developing, so the dashboard is becoming more and more technologically advanced. But since the Lada Priora is a low budget car, the panel on it is of the same quality. On the first devices, the backlight often does not light up, or is only half lit. Of course, this doesn’t look good on Priora.

The instrument panel on the Priora car changed with the restyling of the 2nd Lada car. And Lux cars come with navigation. In fact, its basic functionality remains the same - all basic information is visible. Here you can monitor the operation of the engine, monitoring the speed, and understand that it is time to take the car for maintenance when one of the lights comes on. The price of a first (1) and second (2) generation part starts from 6,000 rubles and above. Tidying saves you from speeding, helps you refuel on time and prevent the Priora from boiling.

Fuse box

The weak link of the electric power steering on Kalina is the fuse box; if something doesn’t work, it’s worth checking them. To get to them, you need to open the dashboard, to the left of the steering wheel. To do this, pull the top part towards you and the latch will open.

Check if the fuse is working, if it fails, replace it. It is very easy to check, check the integrity of the thread inside the fuse. Changing a 50 amp relay to a 30 amp one will also help.

Newer versions of Kalina are equipped with electric amplifiers from Hyundai, which has a positive effect on its reliability. However, there are still thousands of cars with the domestic version, which malfunctions and breaks down from time to time. Now it will be easier for you to repair the electric power steering on Kalina yourself. The main thing to remember is that not every amplifier shutdown is a breakdown. And you can find the problem yourself and fix it, but somewhere you will have to go to a service center.

Source: automorum.ru

Replacing the EUR

So, you need to replace the electric booster on the Priora or simply check the condition of its contacts. In any case, repair involves complete removal of the unit. Prepare the necessary tools:

Chisel and hammer.
Deep head for 8 and 13.
Extension and ratchet, alternatively you can use a wrench.

It’s quite easy to remove the amplifier itself with your own hands, but in order to get to its mounts and the control unit, you will need to remove many parts of the dashboard: the steering wheel along with the airbag, the casing and the ignition switch. Once these components are removed, repairs to the amplifier can begin.

Step-by-step instruction

We take the “eighth” head, put on the ratchet and remove the contact group, as shown in the photo below;

Now you can study the contacts in detail and, if necessary, make repairs. If you know that the main components (control unit, motor) have failed, then you need to replace them. Installation of a new device occurs in the reverse order. The DIY repair is complete.