Installation and arrangement of electric power steering for Lada Priora

Most Lada Priora cars were equipped with electric power steering from the factory, produced by Avtoelektronika Kaluga. It is these EURs that are considered quite reliable and rarely fail. For comparison, problems with amplifiers produced in Makhachkala are much more common.

If for any reason you need to replace the EUR or simply remove it from the car, you can perform this repair yourself. For this procedure we will need a tool such as:

• 8 and 13 mm head - preferably deep
• ratchet or wrench
• extension
• hammer
• chisel

Installation and arrangement of electric power steering for Lada Priora

1. Electric power steering for Lada Priora

Many questions arise about power steering and electric power steering. But it turns out there is also an EGUR

.

Electro-hydraulic power steering systems

, sometimes abbreviated as
EPS
, and also sometimes called "hybrid" systems, use the same auxiliary hydraulic technology as a standard system, but their hydraulic pressure is provided by a pump driven by an electric motor, instead of a belt drive from the engine.

The belt is removed, and the pump drive rotates the electric motor, which is controlled by the controller.

Electrohydraulic systems can be found in some Ford, Volkswagen, Audi, Peugeot, Citroen, Skoda, Suzuki, Opel, MINI, Toyota, Honda, and Mazda vehicles.

Electro-hydraulic power steering operates depending on the speed of rotation of the steering wheel and vehicle speed. The power steering pump unit consists of a gear pump and an electric motor.

Instead of a vane pump (in conventional power steering), the electrohydraulic power steering pump unit uses a gear pump. This pump is driven not by the car engine, but by an electric motor built into the pump unit. The electric motor operates only when the ignition is on and the car engine is running.

Typically a pumping unit

made in the form of a single block. The pump unit bracket is bolted to the side member between the front bumper and the wheel well. The pump unit is suspended from the bracket by means of elastic rubber elements.

Electronic amplifier control unit

For the pump to operate, the following signals are required: 1. Vehicle engine speed. 2. Vehicle speed. 3. Steering wheel rotation speed. Basic functions The unit controls the gear pump drive depending on the steering wheel speed and vehicle speed. Additional functions Protection of the power steering from overheating. Protection against restarting in case of malfunction. On-board diagnostics The control unit recognizes faults that arise during operation and registers them in ROM.

If you enter a quick search, then the owners suffer with it: Ford Focus 2, Peugeot 307, Skoda Fabia, Opel Vectra and Astra, Skoda Roomster.

Installing EUR on Priora

I’ll say right away that first of all it’s better to disconnect the battery and the steering wheel with cushion, and it’s better to remove it together with the steering column switches (more precisely, with what the switches are held on).

It’s difficult to find an EUR, a new one is expensive, and they don’t hang on Avito for a long time. There was an EUR for sale not far from me; it cost 7500 including the driveshaft. I had to buy the wires separately; they cost 1300.

We remove the dashboard and connect the speed sensor, tachometer and warning lamp to the necessary wires. You also need to connect one wire to the ignition, and the black one to ground. There are diagrams on the internet. But the colors there may not match the colors on the purchased wires, this happened to me. I found the wiring and connection more difficult than the installation itself.

Adjusting the uneven steering wheel position in Lada Priora

The steering rack was repaired. After installing the rack back, to get the bolt into the steering wheel mounting slots

Source

Purpose of the unit

Due to the operation of the ESD, the load and force on the steering wheel are reduced when making a turn. The unit greatly facilitates driving, and at high speed it does not allow dangerous maneuvers.

The unit includes the following components:

1. Steering wheel;
2. Column;
3. Shaft;
4. Electric motor;
5. Steering mechanism;
6. Electronic control unit (ECU);
7. Torque sensor.

When turning, the electric power steering is activated. The torque is provided by an electric motor, which is present in the EUR design. The torque sensor measures the indicator and sends it to the ECU. Depending on the angle of rotation, the block calculates how much power needs to be given to the motor. The switch located under the steering wheel contains a device that determines the angle of rotation. The torque and rotation sensors transmit data to the ECU, which “determines” whether the electric motor is running at the desired speed.

On previous generations of VAZ cars, a hydraulic booster was installed; it gave almost the same force in all rotation ranges. As for the electric power steering, the degree of force depends on many factors - the speed of rotation of the steering wheel and its angle, the speed of the power plant, the speed of movement.

EUR Priora: repair or replacement with power steering

For several years now, there have been heated debates and “spears breaking” regarding the Prior’s electric power steering on the pages of the Internet and periodicals. This is largely due to the fact that a number of owners of this, the most popular model of the domestic automobile industry, under the influence of a number of publications, have formed the opinion that the electric power steering (EPS) on the VAZ 2170, 2171 and even 2172 models poses a certain danger for drivers.

In this regard, it is worth understanding what this electrical control unit is, what its installation has brought to motorists, and what measures should be taken if there are suspicions about its malfunction.

It should be said that according to experts, including experienced car enthusiasts, thanks to the presence of an electric booster, driving the Priora has become much easier, this is especially noticeable at low speeds. Some drivers, accustomed to tighter steering forces, even feel that the steering has become too easy.

However, already from a speed of 80 km/h, the force on the steering wheel begins to increase, and from 100 km/h the assistance of the amplifier stops altogether. In addition, it was noticed that when turning quickly, the steering arm seemed to become shorter, although this feeling should be considered subjective - in practice, turning the steering wheel from lock to lock remained the same. I would especially like to note that anyone who has managed to get acquainted with this useful unit is unlikely to consciously express a desire to abandon it.

Of course, the topic of the reliability of the EUR on the Prior deserves special mention. Indeed, several years ago there were quite a lot of complaints about the occurrence of various malfunctions and it came to the point that a significant number of cars were recalled through official dealers to manufacturing plants.

However, those car enthusiasts who are seriously interested in this topic can, with some desire, find an investigation by the magazine “Behind the Wheel”, from which it becomes clear that the scandal three years ago was associated with an attempt by the Kaluga company to replace an expensive German microcircuit in one of the EUR units with a homemade electronic assembly.

This “innovative” solution led to cases of spontaneous turning of the steering wheel to the side. Let’s immediately make a reservation that “the comrades were corrected in a timely manner” and now under the hoods of all Priors there are modified and completely reliable (according to modern statistics) units.

We repair the electric power steering on a Priora with our own hands: just what the doctor ordered

» Power steering » We repair the electric power steering on a Priora with our own hands: just what the doctor ordered

In VAZ Priora cars, the electric power steering performs the function of making the vehicle easier to control. With the help of the ESD, the driver can easily turn the steering wheel with one hand. What malfunctions are typical for the amplifier and how to replace the EUR in a garage - we will talk about this below.

In what cases is the steering rack, power steering and power steering disassembled and repaired, what is the connection diagram for the amplifier, what functions does the torque sensor perform?

First, let's look at the main malfunctions of the system, why it does not work and how to fix them:

Methods for determining mechanical damage to electric power steering and steering mechanisms

Mechanical damage is checked only when the EUR as a whole is not functioning correctly, but there are no errors on the on-board computer display. To diagnose mechanical breakdowns, turn the steering wheel in different directions until it stops while the engine is running. Of course, the car must be in one place. If you have to exert significantly more force than usual when turning the steering wheel, this indicates a malfunction in the system and a breakdown of one of the components. The same problem may indicate a failure of other components of the steering system.

To more accurately identify problems, a thorough performance check should be carried out. You will need to drive your Lada Priora onto an overpass, pit or lift, and then carefully diagnose all components of the chassis. It is necessary to check the racks, steering rods and other components, since there is a possibility that the amplifier itself is working, and the signs of malfunction are associated with other problems. To service an electric amplifier at home, you will have to completely disassemble the system, clean its components and put it back together.

Pinout diagram and designations of EUR contacts

Self-removal and installation of the amplifier

You can do the procedure for dismantling and installing a new electric amplifier yourself, but for this you will need to prepare all the tools. To complete the job, you will need two screwdrivers - one with a flat head and the other with a Phillips head. You will also need a set of socket wrenches.

How to complete the DIY removal and installation task:

Unpredictable operation of the electric amplifier

If such a malfunction occurs, it is absolutely prohibited to continue driving, otherwise, due to this breakdown, you can get into a traffic accident or fly off the road. To continue further movement, just turn off the amplifier. To do this, you need to remove the fuse responsible for power supply to the electric power steering, after which you can continue driving without the amplifier.

To eliminate the breakdown, most likely, you will have to completely replace the electric amplifier. It is not recommended to carry out replacement in a garage environment. To do this, it is better to contact a specialized service station. After replacing the electric booster, it is advisable to perform adjustment work on all components of the steering mechanism.

Thanks to everyone who left comments, I’ll write about the EUR for the 8-valve Priora, maybe someone will be interested.

Tired of turning the heavy steering wheel in yards and parks, I decided to install an EUR. I began to collect information about him. There are myths about the EUR that: - firstly, it is not reliable, it constantly breaks down - this is not true, none of my friends have broken down, I asked the sellers of spare parts, the Priorov EUR is bought very rarely, the spare part is not in demand, I only found it in stock in one place, in the rest on order. - he can turn it himself - the malfunctions were not encountered in the EUR Lada Kalina produced in Makhachkala, I didn’t hear this on the Prior. A similar malfunction in the Priora is described in the magazine Behind the Wheel.

The Priora uses an ESD without a gear type; when the ESD is turned off, it does not provide resistance to the rotation of the steering wheel.

For installation you will need - 21700-3450008-01 Electromechanical amplifier assembly (you can get it at a disassembly for 8 thousand) - 21700-3424092-00 Cardan shaft with a joint (the lower half was bought in a store for 700 rubles) - the signal block was picked up at a disassembly from a foreign car radio , 4 mm2 wire, fuse.

Installing the ESD on a Priora does not pose any problems, there is no need to drill or cut anything, one nuance: 1. When you pull off the steering wheel nut, do not unscrew it completely, first pull the steering wheel off the splines, and then remove it, otherwise you can tear off the wires from the signal and the airbag. 2. When you have assembled everything, install the steering wheel, move the steering column switches to the steering wheel so that the switch bracket fits into the groove on the steering wheel.

Methods for determining mechanical damage to electric power steering and steering mechanisms

Mechanical damage is checked only when the EUR as a whole is not functioning correctly, but there are no errors on the on-board computer display. To diagnose mechanical breakdowns, turn the steering wheel in different directions until it stops while the engine is running. Of course, the car must be in one place. If you have to exert significantly more force than usual when turning the steering wheel, this indicates a malfunction in the system and a breakdown of one of the components. The same problem may indicate a failure of other components of the steering system.

To more accurately identify problems, a thorough performance check should be carried out. You will need to drive your Lada Priora onto an overpass, pit or lift, and then carefully diagnose all components of the chassis. It is necessary to check the racks, steering rods and other components, since there is a possibility that the amplifier itself is working, and the signs of malfunction are associated with other problems. To service an electric amplifier at home, you will have to completely disassemble the system, clean its components and put it back together.

Pinout diagram and designations of EUR contacts

Self-removal and installation of the amplifier

You can do the procedure for dismantling and installing a new electric amplifier yourself, but for this you will need to prepare all the tools. To complete the job, you will need two screwdrivers - one with a flat head and the other with a Phillips head. You will also need a set of socket wrenches.

How to complete the DIY removal and installation task:

Photo gallery “Removing the EUR”

On the Lada Priora, a device such as electric power steering is offered as a standard feature as a comfort feature. It is this device that we will talk about in this article. We invite you to find out what malfunctions the car owner of this car may encounter and how to replace the unit yourself.

Advantages and disadvantages of amplifiers

Lada Priora can be equipped with both a hydraulic booster and an electric booster. Many car enthusiasts increasingly prefer cars with EPS, although it would be more accurate to call it EMUR - electromechanical power steering.

Common faults and solutions

Many prior drivers encounter device breakdowns, in particular, we are talking about a malfunction of the control unit. If the system control unit does not work correctly or is faulty, a corresponding error will appear on the on-board computer display. Having deciphered it, you can understand that the computer reports a failure of the EUR connection, which in most cases indicates the presence of problems in soldering. In particular, we are talking about the connection point between the amplifier board and the controller.

This malfunction can be solved either by replacing the system at the dealer, if the car is under warranty, or by repair. If you do not have experience in chip tuning or working with electronic devices, then solving such a malfunction should be entrusted to professionals. Of course, in order to accurately make a “diagnosis”, you will need to conduct computer diagnostics.

It often happens that the speed sensor malfunctions, which again contributes to the appearance of an error on the on-board computer. This type of malfunction can be solved by reprogramming the device or replacing the wires in the places where the regulator connects to the controller. If the regulator itself is not working, then it will have to be replaced (the author of the video is Alexey a-skorp).

Too low a voltage level in the car's on-board network is also a common problem. In this case, it is necessary first of all to pay attention to diagnosing the generator device or wiring. Use a tester to check. In any case, if problems are detected in the operation of the system, it is necessary to repair the steering rack yourself. Operating a car with a non-functional ESD is not allowed until the problem is completely eliminated.

How to determine mechanical damage to the EUR and steering mechanisms?

Mechanical diagnostics are carried out if it is not normal, but the on-board computer does not generate errors. To check for mechanical damage, you need to turn the steering wheel left and right as much as possible, while the engine must be running. It should be noted that when turning the steering wheel, the vehicle must remain in one place.

If you notice that when turning the steering wheel you need to apply more force than usual, this may indicate a failure of parts or components of the amplifier. But this may also indicate a breakdown of other elements of the steering system (a video about diagnosing power steering using a paper clip is presented below, the author of the video is Gosha Vakhromeev).

To accurately identify what caused the problem, you will need to conduct a more thorough diagnosis. To do this, the vehicle first needs to be driven onto a lift and raised, while carefully checking all the elements of the chassis for operability. Racks, tie rods, etc. must be checked. This procedure can be carried out without any problems at any service station or on your own, but only if you have a lift and certain diagnostic skills. There is a possibility that repair of the EUR is not required, since it itself is operational, but repair of other elements is required.

To prevent the occurrence of malfunctions associated with the electric amplifier, it is necessary to clean the system, as well as contact nodes, from time to time. To carry out service yourself, you will need to remove your EUR, completely disassemble it, clean it and put it back. We will tell you more about this below.

Fuse box location

If you suspect that a fuse has blown and you want to check it, then the question arises: where is the Priora electric power steering fuse located?
The control mounting block is located to the left of the steering wheel. Its opening scheme is simple. All you need to do is turn the three latches 90˚ and remove the cover, as shown in the photo, and you get to the brain stuffing of the car. Here you can check and replace the failed fuse, then close the lid by pressing it tightly and snapping the three latches back 90˚ in the opposite direction.

You can carry out diagnostics and minor repairs to the Priora's electric power steering with your own hands. To do this, it is enough to determine what caused the failure and fix the problem, following our advice. It is better to entrust a complete replacement of the electric amplifier to professionals.

Malfunctions and their symptoms

Undoubtedly, the electric booster is a more reliable unit than a device running on hydraulics, but malfunctions also appear in the power steering. If they are detected, repairs must be carried out immediately, since the safety of the driver, his companions and other road users depends on the operation of the amplifier.

Complete failure of the EUR

As practice shows, this unit does not have many faults; breakdowns occur in the same parts. The first thing worth considering is the complete failure of the ESD. When you turn off the amplifier, you need to check the on-board computer screen; most likely, you will see a code there indicating a malfunction in the unit. But sometimes it is possible to determine when an amplifier is turned off only in practice.

We perform the following actions:

Even with the ESD not working, you can continue driving, but this is not recommended. The driver needs time to get used to driving with the help of an amplifier. It is better to immediately begin diagnostics and determine which component requires repair or replacement.

Sometimes the amplifier and speedometer stop working at the same time. The cause of this defect is a speed sensor that has failed. Taking a look at the electrical diagram, you will understand that these three elements are connected. The torque sensor supplies data to the control unit, it compares it with speed and determines the force. If the cause is the speed sensor, then the repair consists of checking the wiring that leads to this element. It is also worth checking the wires connecting the sensor to the speedometer and power steering. If there are no breaks in the switching, then the sensor should be changed.

Complete failure of the electric amplifier

There are not so many malfunctions that arise with the EUR on the Priora. The first thing that happens is the amplifier stops working completely. Often, turning off the amplifier is accompanied by a corresponding code, which is displayed on the display of the on-board computer, although there are also cases when its shutdown can only be detected experimentally.

1. Several turns of the steering wheel in different directions with the engine not running.
2. Then you need to carry out the same operation, but with the car running.
3. If the force required to apply to the steering wheel has not changed, this means that the power steering is not working.

There are times when the amplifier on a Priora turns off along with the speedometer. The culprit is the speed sensor. The fact is that these three elements are interconnected. This scheme allows you to regulate the operation of the electric power steering depending on the speed limit. Repair in this case comes down to checking the functionality of the speed sensor and the wiring going to it, the speedometer and the power steering. If commutation breaks are detected, it must be restored. And when the fault is in the sensor itself, it is simply replaced.

Severe contamination of the contact group of the torque sensor installed on the amplifier can also cause a shutdown. Moreover, the on-board computer, conducting self-diagnosis of the system and identifying problems with the operation of the torque sensor due to contamination, can itself deliberately turn off the amplifier. Repair in this case comes down to removing the EUR from the car, disassembling and thoroughly cleaning the contact group. But since the operations to restore the functionality of the electric booster are complex and incorrect assembly and installation of it on the car can affect the correct operation of the steering mechanism, it is advisable to contact specialists to restore the power steering.

Removing and installing EUR at home

In order to remove the device from the car, you will need to prepare in advance everything that may be useful to you in the process. In particular, we are talking about flat-head and Phillips-head screwdrivers, as well as a set of socket wrenches.

So, how does the procedure for removing and installing the electric amplifier take place:

After completing these steps, the amplifier itself is removed - it is dismantled along with the intermediate shaft. But in order to make it more convenient for you to clean the assembly and then perform the installation in reverse order, it is advisable to disconnect these components from each other in advance. To do this, use a 13mm wrench to unscrew the screw securing the universal joints to the shaft itself. Then you will need to unscrew the two fixing nuts at the ends, after which the steering column itself can be removed.

Then you will need to remove the screw and remove the cardan from the splined pulley of the unit. To make the reinstallation procedure more convenient after removal, it is advisable to make sure that all marks match. We are talking about marks on the protective cover, pulley, and also the starter cover. Cleaning the contact group mechanism and other elements of the system must be done carefully so that all components remain intact and undamaged. If you turn to specialists for help in this matter, the cleaning procedure will cost you on average about 30-50 dollars, depending on the region.

Most Lada Priora cars were equipped with electric power steering from the factory, produced by Avtoelektronika Kaluga. It is these EURs that are considered quite reliable and rarely fail. For comparison, problems with amplifiers produced in Makhachkala are much more common.

If for any reason you need to replace the EUR or simply remove it from the car, you can perform this repair yourself. For this procedure we will need a tool such as:

New VAZ-2110 rack

The rack without power steering of the new model is somewhat different from the old eight and old ten:

• reinforced body (similar 2110-3400009-20 );
• helical rack with variable pitch (catalog number 2110-3401068 ) and helical drive gear;
• The intermediate steering shaft should be shorter than the old one.

New type rack without power steering.

Options

• Catalog number of the new rail - 2110-3400012 .
• The full stroke of the rack is 4.2 turns .
• For vehicles equipped with power steering, it is assumed that a rack with catalog number will be installed 2110-3400010-30 .
• Number of revolutions until the wheels turn completely - 2,7 .

Power steering rack assembled with rods.

A new rack can be installed to replace the old one without any problems, however, it is worth considering that the intermediate shaft of the steering mechanism of the old design was longer, so the rack needs to be replaced with a new shaft and, preferably, with new rods.

How to remove the EUR on a Priora with your own hands

In fact, the electric power steering can be removed without any problems, you just have to remove quite a lot of parts first. Namely, you will need to do the following:

After that, using an 8 mm socket and a ratchet, unscrew and remove the contact group.

We remove it from the shaft completely so that it does not interfere.

Now you need to disconnect all the power wires from the power steering control unit, which are clearly shown in the photo below.

Each of the plugs has its own lock, so be sure to first look at the design of the lock so as not to damage it when removing it. When you have dealt with the wires, you need to unscrew the coupling bolt at the fastening of the driveshaft with the steering rack.

Using a chisel and a hammer, we slightly expand the coupling “collar” of the cardan shaft. Then you can begin to unscrew the nuts securing the EUR to the body. Two nuts are located at the front.

And two from the bottom.

Of course, when unscrewing the last fastening nuts, it is necessary to hold the EUR so that it does not fall. Next, we pull it off the steering rack shaft and remove it completely. If necessary, we replace it with a new one. This mechanism is installed in the reverse order and we connect all the necessary wires to their places.

Features of the VAZ-2110 steering rack

Initially, the new tenth family was equipped with a figure-eight steering rack without any changes.

Original VAZ-2108 steering rack.

By the way, all modifications of the slats that we will consider below can be interchangeable. With the exception of racks designed for hydraulic booster. The eight-rack was developed back in the late 70s of the last century; it has a spur-tooth rack-and-pinion gear transmission, and the full rotation of the steering wheel is 3.7 turns.

Rack modernization

A few years later, the rack for the VAZ-2110 was improved. This was expressed in strengthening the steering gear housing and the use of a figure-eight gear-rack pair (“rasp,” as mechanics affectionately call it).

Catalog number of the helmsman - 2110-3400009-20 .

These two racks can be interchanged without replacing any additional steering components. I took it off and installed it.

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:

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.

Chip errors

When a situation is observed that the wheels turn on their own, the reason is the electronic filling of the Priora electric power steering control unit. As mentioned above, quality was sacrificed for the sake of economy. Now the situation with this seems to have improved and everything has been finalized, but if suddenly you feel that the steering wheel is starting to move by itself, go for repairs.

If, along with the electric power steering, the speedometer also fails, then you need to look at the speed sensor. It was either simply dirty or broken. The same applies to the torque sensor installed on the amplifier. Clean them well and check their functionality.

Don’t forget to reset errors on the on-board computer; this can be done in several ways.

1. Remove the terminal from the battery, wait a few seconds and put it back, the error should go away.
2. Using a computer, the corresponding software can be found on the Internet.