Modern cars differ significantly from their relatives produced in the past century. They now start with a lot electronic sensors and other devices that facilitate the management process vehicleto help save fuel and increase the safety of both driver and passengers.
Not spared progress and steering wheel - now the car owner can keep the car on the course with just a few fingers. What contributes to this? Availability electric amplifier steering wheel.
However, this device (abbreviated EUR) sometimes breaks.
In this article, we will tell you how the electric power steering works on the Lada Priora, and also describe the most common malfunctions.
What you need to know about EUR
This device creates a force that is transmitted directly to the machine control system. Thanks to this, the driver does not need to strain too hard to keep the car on the road and move in the right direction.
Previously, a hydraulic analogue of the unit in question was installed on all products of the Volga Automobile Plant, but it was decided to abandon it from Kalina. Instead, the machines were supplied with an electric amplifier. It is generally inferior in power to the aforementioned, but that, however, has a number of significant drawbacks. These include:
- the need to constantly check the liquid level;
- loss of power of the power plant;
- regular inspections of the oil supply system.
The EUR is not characterized by any of these defects.
Moreover, it is much easier to repair an electric amplifier, but it has plenty of its own shortcomings.
Device
The main components of the EUR are as follows:
- electrical part;
- mechanical;
- controller and peripherals.
The first includes, in particular, the electric motor.
The mechanical part consists of:
- steering wheel parts;
- connections;
- input and output shafts;
- bracket;
- tilt adjustment lever;
- studs, bolts, nuts, etc.
This also includes the steering rack.
As practice has shown, most often fail exactly electronic devices, that is, the ECU, sensors and the distribution terminals connecting them.
Diagnostics
First of all, it should be noted that the breakdown that occurred with the EUR is determined by the indication on the instrument panel. It has a light bulb that schematically depicts a steering wheel and an exclamation mark.
Normally, after starting the engine, it lights up for a couple of seconds and then after a self-diagnosis carried out by the ECU, it goes out when no failures are detected. But when a problem is detected, the indication does not turn off.
Do not forget that the peripheral electric amplifier controller communicates with the vehicle ECU. Therefore, it is better to identify such breakdowns at a service station using a computer.
However, at present, individual devices are on sale for testing the performance of certain electronic components. They are easy to operate and are quite inexpensive - up to 1.3 thousand rubles.
Thus, an individual scanner allows you to find out what happened to the car. It should be connected to the ECU - the latter will give out error codes. All ESD related to malfunctions begin with "C". In particular, C1013 signals too low voltage in onboard system - this means that it is not enough for normal work amplifier.
According to experts, the most common problems are as follows:
- breakage, burning or short circuit of the wires supplying the EUR (they are red and black, have a larger cross section than the others, and also enter a separate connector);
- blown fuse;
- low voltage.
In the latter case, it is required to check how batteryand generator.
How to find a breakdown without a scanner
In the event that the error light does not light up, but there are still suspicions of a breakdown of the EUR, or when it is necessary to make sure that the control system is working after its repair, you should proceed as follows:
- with the engine off, turn the steering wheel to the sides;
- remember what force had to be applied;
- turn on the ignition and repeat the procedure.
If no noticeable differences are observed, then definitely something happened to the EUR.
Malfunctions
On the mechanical side, shafts, fittings or connecting parts usually fail. In this situation, when the steering wheel is turned, the wheels remain stationary. In general, everything is repaired here quite simply - by replacing worn-out parts.
A breakdown of an electric motor usually requires the purchase of a new one, since it cannot be restored. A new unit is sold in any large store, and it is not difficult to install it on your own.
When it turns out that there was a break in communication between the controller and the EUR, it is necessary to inspect the connectors. In this case, attention is paid to the second of them (the first, as previously noted, is power). You also need to climb there if no signals are received from the sensors of the distribution and crankshaft... If the wiring is frayed or its insulation is broken, the entire harness will have to be replaced. It is sold separately and is inexpensive. Otherwise, you will need to check all the contacts and "ring" them with a multimeter.
The sensors are checked by replacing them with known working ones. A faulty controller cannot be repaired, so you will need to purchase a new one.
Dismantling the steering column
For this procedure, you must prepare:
- key for 8 (ring);
- 13 (end);
- phillips screwdriver.
Before starting work, it is important to disconnect the battery. It is enough for this to remove the wire from the negative terminal.
- remove the steering wheel;
- the plastic shields are removed from the column (they are held on two screws and clamps each);
- dismantle the lower part of the lining by unscrewing 4 bolts;
- disconnect the wires from the lock and turn signal switch, etc.;
- with a key of 8, partially loosen the clamp holding the above devices and completely remove them;
- pull out the detachable terminals of the EUR controller;
- remove the plastic cover.
On Lada Priora cars, electric power steering is almost always offered in basic configuration, as additional option comfort. At the same time, the Priorovsky EUR often fails, then it can be repaired independently or with the help of specialists.
1 The role of the electric booster in the steering of the VAZ 2170 Priora
Steering and serviceability brakes plays a key role in ensuring safety while driving. That is why, when the slightest malfunction of these units appears, it must be urgently eliminated. On foreign-made cars, the power steering can be found starting from the models of the 80s, as for the domestic auto industry, the era of mechanical power steering fell on the mid-2000s. A little later, instead of the usual hydraulic amplifiers for more modern models VAZ began to install electric amplifiers (starting with the later models VAZ 2114-2115).
Power steering has the function of reducing the load and effort on the steering wheel when maneuvering. The main advantage of the amplifier is driving comfort due to good feedback between the driving wheels and steering during maneuvering. However, the classic power steering also has a number of disadvantages, the main one of which is the need to constantly monitor the health of the pipes and the level of fluid in the hydraulic booster reservoir. In addition, the mechanism takes some of the engine thrust, which does not always have a positive effect on the dynamic characteristics of the car.
Electric power steering is a more modern and well thought-out mechanism that allows you to improve steering... The EUR is easier to operate, does not require additional fluids and pipelines, does not take engine power and provides maximum comfort. However, this mechanism also has a number of disadvantages, the first of which is the insufficient amount of feedback between the roadbed and the control system. Because of this, for example, on a snowy road, certain difficulties may arise, which is often noticed by the owners of VAZ Priora and other domestic models. And if foreign cars that are equipped with EUR have additional systems stabilization and blocking, then on Priora models, especially on the first versions, there are no such locks. In addition, the electric amplifier on the VAZ 2170 Priora models often fails either completely or in some component parts.
2 Diagnostics and repair of faults of the power steering on Priora
Starting in 2010, an import substitution program was launched, which also affected the car manufacturer VAZ. Electric power steering began to be supplied by the domestic plant "Avtoelektronika" from Tula instead of the German analogue of Bosch. It cannot be said that the Priora car owners did not have any difficulties with the latter, however, during commissioning new version motorists increasingly began to complain about electronic errors in the EUR control unit, which sometimes completely block the operation of the entire mechanism.
Thus, if the screen on-board computer (factory or built-in) an error appears that looks like a failure of the power steering system, most likely the problem is in the soldering in the joints of the electric power steering board with the main car controller. This is especially true for cars produced in 2011-2012. This problem can be solved under warranty, in which case the dealer must replace the power steering mechanism with a new one. However, if the car warranty no longer applies, it makes sense to contact competent electronics specialists (for example, those who are engaged) in order to conduct high-quality diagnostics of the system and, if possible, try to extend the life of the electronic microcircuit by software or mechanical means.
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Sometimes, even with a working microcircuit and reliable soldering, the operation of the speed sensor gets lost, since it is directly connected to the EUR and regulates the operation of the mechanism depending on the speed of movement in a specific area.
In such cases, on the VAZ Priora or Kalina model, as a rule, the dashboard or tachometer goes out, and the computer reports that the electric power steering has failed. The problem is easily solved by software settings, by replacing the wiring at the junction of sensors and controllers, or by replacing the speed sensor or torque sensor with the EUR.
Another reason for the malfunction of the electric amplifier on the Priora, which does not depend on the factory defect or problems with the board and connections, is insufficient voltage on-board network in the car. In this case, you should pay attention to the serviceability of the wiring and the generator using special diagnostic equipment.
It should be noted that if the electric power steering is defective, it is not recommended to continue operating the vehicle, although driving performance and this does not affect the dynamics. The fact is that over time, other steering mechanisms (rack, etc.) that are associated with it may fail, plus the appropriate comfort and safety when driving is not provided.
3 How to determine mechanical damage to the power steering and steering mechanisms?
The easiest way to troubleshoot power steering is different cars, including the Lada Priora model, when it does not give any errors, but the driver notices that the amplifier works differently - mechanical check... To do this, turn the steering wheel as much as possible in different directions with the engine on, provided that the car is stationary. If at some point when the engine is running, more effort is needed, as, for example, when the engine is not running, the reason may be either a breakdown of any parts of the EUR, or a malfunction of other steering mechanisms.
In this case, it is necessary to carry out mechanical diagnostics, for which the car must be lifted onto a special lift and examined for serviceability of various elements of the chassis, steering rods, rack, etc. This can be done at any service station or on your own if you have certain knowledge and a lifting mechanism. Perhaps the hydraulic booster or electric booster is in good order and the problem lies elsewhere.
To avoid various problems with the EUR, experts recommend periodically cleaning the part and contact mechanisms from contamination. To do this, it is necessary to remove the electric amplifier, disassemble it, clean it and install it in place. Next, we suggest detailed instructions for the removal and installation of the EUR for the Lada Priora model of various generations.
4 Removing and installing an electric amplifier on a VAZ Priora with your own hands
To remove the EUR from the Priora, you must have a set of standard and Phillips screwdrivers, keys 8 "and 13" with a socket head. The first step is to disconnect the negative terminal with the battery, then you will need to remove the steering wheel, as described in the operating instructions, the decorative trim under the steering wheel and the plastic trim of the instrument panel.
- Through phillips screwdriver unscrew the 4 self-tapping screws from the bottom steering panel pad.
- Pads with wires should be disconnected from the steering column switch together with a slip ring.
- Using an 8 "wrench, unscrew the bolt, which will disconnect the wires coming from the ignition switch.
- Press down on the plastic clips and disconnect the wiring harnesses at the top and bottom of the steering column.
- At the place where the EUR is attached to the steering column, it is necessary to remove the decorative plastic curtain by pressing the clips.
- Use a socket wrench to loosen the nuts securing the lower part of the steering column.
To take off intermediate shaft, using a 13 "wrench, remove the bolt that secures cardan joints intermediate shaft... Next, unscrew the two fastening nuts on the right and left sides and remove steering column... After that, remove the bolt and remove the universal joint from the splined shaft of the steering gear. For convenience, during further installation, which is carried out in the reverse order, you must make sure that the special marks on the protective case, shaft and crankcase cover (see photo). Clean contact group and other parts must be extremely careful, trying not to damage them. Such a procedure in the service will cost about 2,000-3,000 rubles.
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Often refuses to work both on new Lada Kalina cars and on cars with high mileage... If you have problems on dashboard the yellow error in the form of a steering wheel with exclamation mark... It indicates a malfunction or failure of the electric power steering. It should be borne in mind that yellow color indicates that the problem is not critical and you can drive the car without the help of the electric booster. In case of his refusal, it is better to pull out the EUR fuse, which is to the left of the steering wheel.
Repair of the electric power steering viburnum must be carried out for various reasons.
The main causes of malfunction of the electric power steering:
- Malfunctions in the electric power steering itself. When the ignition is turned on, the EUR does not pass self-control and turns off itself so as not to interfere with the driver and not cause emergency situations on road. In such a situation, repairs will be quite expensive and with a valid warranty it is better to use it.
- Faulty speed sensor, which is quite common reason... In such a situation, repairs will be inexpensive and you can do it yourself. The fact is that the EUR does not work with a constant force that is applied to the steering rack. He works for full power only when the vehicle is moving at low speed or standing still. When accelerating in a car, the electric power steering reduces efforts by steering rack, thus the driver can better control the movement of the vehicle. Thus, the higher the speed, the less the EUR works, helping this driver. The EUR reads the speed of the car from the speedometer, which receives data from the speed sensor. Sometimes the sensor breaks down and gives incorrect information. As a result, the EUR turns off, because it does not know the speed of the vehicle. After that, the EUR error on the dashboard lights up. In this case, the repair of the electric power steering of the viburnum is carried out by replacing the sensor.
To avoid premature repair of the electric power steering viburnum, timely diagnostics should be carried out in order to identify problems of its functioning and assess its performance.
