Electronic engine control unit (controller) VAZ 2170 Priora

The electronic control unit is located under the instrument panel. To replace the electronic control unit, you will need a Phillips screwdriver. Remove.

2. Use the blade to cover the floor tunnel on the right.

3. Take hold of the protrusion two by one and move the fixing bracket of the plane along the connector until it stops.

4. Disconnect the block from the ECU from the wires.

5. Unscrew (not completely) the two nuts of the ECU mounting bracket.

On the opposite side, the bracket with the ECU nut is not secured

6. Move the bracket to the right with lifting and lifting the ECU slightly up, remove the ECU from Install

car ECU in the reverse order of removal.

electronic A faulty unit can only be replaced with a new unit in which the anti-theft function is not activated.

such When replacing the ECU, it will allow the engine to start regardless of the immobilizer.

To activate the anti-theft function, carry out the immobilizer training procedure.

activation For the anti-theft function of the new controller, it is necessary to perform a training procedure using the existing working and training keys.

The ECU on the Priora is located under the instrument panel on the right side. In order to get to the engine control unit, you need to remove the plastic plug of the floor tunnel at the feet of the front one. the passenger behind it is a controller, which is clearly visible in the photo below.

In order to replace (remove) the brains on a Priora, you will need the following tool:

• 10 mm head
• extension
• ratchet or

For M-74, the process of turning off the immobilizer will look like this:

Disconnect the battery, disconnect the immobilizer control unit from the network. A harness with cables and a double switch is connected to the immobilizer. The circuit is connected to the battery and computer using a VAG-COM adapter. The first button of the switch is activated, it “gives the go-ahead” to change the code. The code is changed in the WinFlash program. First of all, in the settings you select the module type and the information transfer speed parameter. The second switch button is activated; it is responsible for communication between the computer and the immo control unit. The standard lock code is retained, and the Eeprom cell data is overwritten. The whole process takes a long time, but you need to wait for contact. Upon completion of the recording process, the control unit is connected back to the vehicle network, and the battery is started.

How is the Lada Priora rechipped?

All actions to reflash the engine are performed on the electronic control unit (ECU). In this block, you can replace the standard parameters with the desired ones, for example, you can adjust the ignition timing settings, the volume of fuel in the cylinders, exhaust control, the level of toxicity of exhaust gases, increase traction and engine power, etc.

The process is carried out in two ways:

1. Installing a new chip with a new program in the ECU.
2. Changing the parameters of an existing ECU chip.

Equipment

To chip the ECU you will need:

• A laptop with a pre-installed program for reconfiguring the chip.
• Adapters, cords and adapters for connecting a laptop and a car's ECU.
• New program (firmware) and modules.

Two autostart connection schemes

Priora where is the oil pressure sensor located photo 16 valves
Autostart is implemented in different equipment models in different ways. Typically, two wires coming from the “power” connector must be connected to the gap in the standard wiring connected to the starter (pin “50”):

Autostart and alarm Starline A91

What is indicated above is the first option, but not the only one. Before installing an alarm system on a VAZ, ask how autostart works in it. Perhaps an “alternative” version of the scheme is used:

Autostart, Tomahawk brand equipment

Here, as you can see, there are two different circuits connected at the “T” point.

If the scheme is implemented in the first way, most likely, the signaling system is designed like this: by turning the key to the “Start” position, the owner initiates the triggering of the crawler. If the second option is used, the latter cannot be true. Thus, all crawler modules that have 4 taps (2 for antenna and 2 for power supply) are not applicable in any way in the second case.

“Thin” wires – antenna terminals

The connection is made through a break in the standard wiring or using inductive coupling. Both options are discussed below.

Engine tuning Priora 21126 1.6 16V

Chip tuning of the Priora engine

For fun, you can play with the sports firmware, but there will be no obvious improvement; see how to properly increase the power below.

Priora engine tuning for the city

There are legends that the Priora’s engine produces 105, 110 and even 120 hp, and the power was underestimated to reduce taxes, various measurements were even taken in which the car produced similar power... what everyone decides to believe, let’s focus on the indicators declared by the manufacturer. So, how to increase the power of a Priora engine, how to charge it without resorting to anything special, for a small increase you need to let the engine breathe freely. We install a receiver, a 4-2-1 exhaust, a 54-56 mm throttle body, and we get about 120 hp, which is quite good for the city.

Boosting the Priora engine will not be complete without sports camshafts, for example, STI-3 camshafts with the configuration described above will provide about 140 hp. and it will be fast, an excellent city engine. The modification of the Priora engine goes further, sawn cylinder head, Stolnikov 9.15 316 shafts, light valves, 440cc injectors and your car easily produces more than 150-160 hp.

Schematic diagram (pinout) of connecting the front wiring harness on the Priora

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The front part of the vehicle's electrical circuit is designed to supply voltage to the primary and auxiliary power circuits of the vehicle's on-board systems. The decoding of contact group chips is as follows:

• 1 – starter power supply;
• 2 – battery;
• 3 – charge supply from the generator;
• 4 – connecting block for the bundle (1 – 3);
• 5-7 – power supply to the device;
• 8 – engine compartment lighting lamp;
• 9-10 – head light;
• 11 – brake expansion tank level indicator;
• 12 – outside temperature;
• 13 – washer drive;
• 14 – external indication of reverse gear;
• 15 – cooling system fan;
• 16 – stove reducer;
• 17 – reserve resistor;
• 18 – wiper drive;
• 19 – interior relay and fuse module;
• 20 – stove motor;
• 21 – sound alarm indicator;
• 22 – horn power supply;
• A1/2, B1/2 – mass.

Error codes

In error mode, the computer may display the following codes:

• 2 - the network voltage is too high;
• 3 — malfunction of the fuel level sensor;
• 4 — malfunction of the coolant temperature sensor;
• 5 — outside temperature sensor error;
• 6 - engine temperature is too high;
• 7 - low pressure in the lubrication system;
• 8 — malfunction of the brake system;
• 9 - low battery voltage.

After troubleshooting, you need to reset the error. If no action is performed within 20 seconds, the on-board computer goes into normal operation.

How to bypass the immobilizer

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If a malfunction occurs in the anti-theft system, the car cannot be started with the key, the immobilizer sends a signal to the ECM to block the main systems. If the need arises to install autostart, the driver has a question about how to disable the Priora immobilizer himself.

Using a crawler

The use of an immobilizer crawler allows you to use the autostart procedure for a vehicle without dismantling or disabling the APS. You can make a device to bypass the system yourself or buy it and install it at a service station.

A simple walker consists of a relay, an inductor for pumping power to the chip, and a diode. A working key is wound to the coil, the circuit is mounted in parallel to the standard pumping coil.

Without a lineman

At the service station, a procedure is carried out to reflash the engine ECU in order to disable the immobilizer. If you have an adapter, laptop and software, you can perform this operation yourself.

To do this you need:

1. Disconnect the negative cable from the battery terminal.
2. Gain access to the ECM, disconnect the unit from the vehicle network.
3. Remove it from the car.
4. Remove the cover from the ECU, solder the resistor on the board to a position that allows reprogramming.
5. Connect the board to the adapter that provides communication with the computer and supply power to it.
6. Using the program, erase data from non-volatile EEPROM memory.
7. Save changes, disconnect from computer.
8. Resolder the resistor to its original place.
9. Install the ECM into the vehicle's electronic system.

When this operation is carried out, the engine ECU stops receiving signals from the immobilizer.

Resolder the chip in the control unit

If there is no adapter and it is possible to supply power to the ECM during programming, it is recommended to unsolder the EEPROM memory chip. In its place, put a new clean chip or the same chip, but only reset it using a programmer.

See » Operating instructions for the StarLine A62 CAN alarm system and how to enable autostart

Disconnect the control unit

Physically disabling and removing the immobilizer from the Lada Priora is not possible, because it is integrated into the car’s comfort unit circuit. Disabling the power supply unit will disable the vehicle.

Where is the Priora comfort block located?

To gain access to the product, you will need to unscrew the protective plastic walls of the car's center console. They are located on the left side of the front passenger seat and on the right of the gas pedal, on the driver's side. The device itself is located above the control unit. In order to remove the device you will need a 10 mm wrench and a Phillips screwdriver.

Pinout of the Priora comfort block

The main, important elements of the device are:

1. The so-called control drivers. Each driver is responsible for a set of specific functions.
2. Transponder receiver.
3. Relay control.
4. Transceiver. Communicates with the module installed in the door.
5. 2 connectors. The first is responsible for supplying power, the second for transmitting the necessary technical information.

Click to enlarge
To ensure proper operation of all elements connected to the comfort unit connectors, it is necessary to study the correct pinout (numbered diagram for connecting wires to contacts). The design of the comfort block for the Priora, when studied in detail, is not particularly difficult.

Removing and installing the computer on a Priora

When the plug is removed, you need to find two nuts securing the ECU from the bottom to the metal strip. This can be clearly seen in the photo below.

It is necessary to unscrew the nuts securing the plastic strip on which the controller is located.

When both nuts are loosened, we move the bar towards the engine compartment literally 1 cm, after which we lift it up a little and move it to the side for removal.

Now we pull out the Priora engine control unit towards ourselves so that we can carry out further actions.

Now we unfold the block in such a way that it is more convenient to disconnect the block with the power wires. Next, you need to pull out the locking frame using a screwdriver or by hand, as shown in the photo:

And now the controller connector is disconnected without any problems.

Installation of a new control unit occurs in the reverse order of removal. It is advisable to carry out a similar procedure with the battery disconnected. If you need to replace the ECU on a Priora, then a new unit will cost at least 6,500 to 10,000 rubles. A used controller purchased from a disassembly unit can be purchased for 3,000 rubles.

Removing the left support

We install an adjustable stop under the gearbox.

Using a 15mm socket with an extension, loosen the tightening of the upper tension nut of the support cushion.

From the bottom of the car, using a 17" socket with an extension, unscrew the nut securing the left power unit support to the gearbox bracket (for clarity, the left mudguard of the engine compartment has been removed)... ...and remove the washer.

Using a 13mm socket with an extension, unscrew the two bolts securing the support to the body.

Remove the left support. To disassemble the support, finally unscrew the upper coupling nut of the support cushion.

Left support parts

: 1 - upper nut; 2 - upper limiter; 3 - pillow; 4 - lower limiter; 5 — hairpin; 6 — washer; 7 — lower nut The upper support stop has two flats. When installing the support...

(1 rating, average 5 out of 5)

Electrical diagram of the dashboard (Torpedo) VAZ-2170 Priora

Part of the on-board network is designed to power the main group of vehicle equipment. The control and display elements of the instrument panel are concentrated here. The wiring supplies power to loaded parts and critical components:

• 1-3 – contact group of the front harness;
• 4 – supply voltage to the aft connector;
• 5 – power supply from the fuse panel;
• 6 – contact group of stops;
• 7 – instrument panel indication;
• 8 – control of illuminators;
• 9 – contact group of emergency airbags;
• 10 – horn;
• 11 – power supply of the diagnostic unit;
• 12 – on-board PC control;
• 13 – ignition coil controller;
• 14 and 15 – supply voltage to the EUR control unit;
• 16 – control of power window equipment;
• 17 – alarm relay;
• 18 – wiper regulator;
• 19 – air flow distributor for the ventilation system;
• 20 – stove;
• 21 – heater drive;
• 22 – heated rear wind window;
• 23 – onboard clock;
• 24-25 – radio connection;
• 26 – emergency warning button;
• 27 – glove compartment lighting;
• 28 – control button for the glove box illumination;
• 29 – bundle of wiring for ignition;
• 30 – to the emergency airbag control board.

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Instrument cluster

1. Disconnect the wire from the negative terminal of the battery.

2. Lower the steering column all the way down.

3. Using a Phillips screwdriver, unscrew the two upper screws securing the instrument cluster trim.

4. Then we need to get to the lower screws securing the instrument cluster trim; to do this, we need to remove the cover of the fuse and relay mounting block.

5. At the bottom, turn the three plastic screws securing the cover of the fuse and relay mounting block 90º counterclockwise.

Note

: Only two of three plastic screws are shown.

6. Gently pry the top with your fingers and, overcoming the resistance of the latches, ...

... disconnect the cover of the fuse and relay mounting block from the dashboard. Let's remove this cover.

7. Now on the left and on the right we unscrew one lower screw securing the instrument cluster trim.

Note

Shown on the left side as an example.

8. Using your fingers, carefully pry it up from above and, overcoming the resistance of the clamps, remove the trim of the instrument cluster.

How it works and what blocks it

The immobilizer on Priora is designed to prevent theft of a vehicle by intruders. It consists of the following parts:

• APS unit, structurally combined with electrical package.
• A sensor, the presence of a key with a “native” chip in the form of a pumping loop wound around the ignition switch.
• Connecting wires for signal transmission.
• Keys with transponder.

When purchasing a car, the owner is given a special key with a red insert, which contains a chip that allows you to train working keys, and 2 working keys with programmable chips. The training key must be kept at home, because it gives access to setting up keys that the APS will consider “native”.

After activating the immobilizer and learning the working keys, the car can be started. But, only if the anti-theft unit “sees” the key with the transponder and a code is written in the chip that matches the information stored in the non-volatile memory of the APS.

In Priora, the immobilizer works as follows:

1. When the working key is turned in the ignition switch cell, a voltage pulse is applied to an inductive coil wound around the lock, which excites electromagnetic oscillations in space.
2. The switch contains an inductance in which the current strength changes, which allows it to receive a pulse from the pump loop.
3. The capacitance is charged, supplying power to the chip with the code.
4. The chip generates a return pulse, which is emitted into space and received by the pump loop.
5. The signal enters the APS, where the codes stored in the block’s memory and the received codes are compared.
6. If the data matches, the anti-theft device does not interfere with the operation of the engine ECU. If the codes do not match, the APS goes into protective mode, transmitting a signal to the ECU, which blocks power to the fuel pump, starter and ignition of the car.

What you need to know about chip tuning

Correct tuning of the Priora involves selecting a suitable program for flashing, which should best suit the vehicle's engine system. A program from another car is not suitable for flashing, since each model has its own program, which contains individual settings for a specific car.

Do-it-yourself ECU modernization, in case of an error, may not give positive results, but only worsen the existing performance of the car. And in some cases, an improvement will still appear, for example, increased power and faster acceleration, but the engine will suffer. Therefore, you should carefully read the information about the procedure for this type of modernization so as not to “damage” your car.

Recently, special systems for cars have appeared that allow you to select optimal programs for working with the engine. Such programs are convenient because you can change the engine settings at any time by switching it to sports mode or economy mode.

Types of ECU memory

In order to perform its functions, the controller has to operate with a lot of data. Some of them are constantly in operation, others are loaded periodically. Therefore, memory is divided into three types:

1. PROM is a programmable read-only memory device. It contains the so-called firmware - a program that controls engine operating parameters, such as fuel injection timing, ignition angle advance control, idle speed, as well as calibration data. This type of memory is retained when there is no power. Data changes are made using reprogramming.
2. RAM is a random access memory device. Performs the same function as the RAM of a regular computer - temporary storage of information during one working session. This memory receives sensor data, stores diagnostic codes, as well as intermediate information about the activity of the microprocessor. It requires electric current to operate.

EPROM is an electrically programmable memory device. This type of memory is part of the standard anti-theft system. When starting the engine, the immobilizer control unit transmits codes to the Priora ECU, where password codes are located that allow or prohibit the start. In addition, the EPROM records deviations in engine operation. This memory does not depend on the supply of electricity and stores information in the controller permanently.

Signs of the need for internal combustion engine repair

The reasons why the operation of the engine is disrupted are arranged in a small list, starting with refusal to start and ending with floating idle speed (this problem was removed on the 127 “engine”). Not all breakdowns end in capital damage - sometimes it’s enough to add oil, sometimes it’s enough to adjust the ECU settings.

Compression reduction

A decrease in cylinder compression below 16 atmospheres is a bad sign. Such a high limit corresponds to a compression ratio of 11.

Knocks in the engine

Engine knocks can come from several points. These could be hydraulic compressors, timing belt rollers or pins. The knocking noise could also be caused by low oil level. The answer to the question will be given by a thorough detailed inspection of all parts of the unit and checking the oil level.

Blue smoke from the exhaust pipe

The blue smoke that comes from the exhaust pipe appears when oil enters the combustion chamber. It can leak either from the valves or from under the piston. The result is the same: the oil is eaten up and blue smoke pours out of the chimney. Once the leak is located, half the problem will already be solved.

Troit motor

Sometimes in the cold the engine may stall - don’t be alarmed by this, because it may simply be one of the spark plugs that fails. In this case, we advise you to simply restart the engine and it will stop running.

How much does it cost to overhaul a Priora engine - average price

Self-repair of a Priora engine with 16 valves costs an average of 16-20 thousand rubles. The cost depends on the severity of the breakdown and may be lower or higher than this average range. Repairing a Priora engine can be entrusted to the wrong hands, but then you will have to pay for the work - sometimes the cost of repairs reaches as much as 40 thousand rubles.

This is an unreasonably inflated figure, because, as practice shows, you can rebuild the engine on a Priora, working at a moderate pace, in just three days - and three days of work is definitely not worth that kind of money. Don’t be afraid of not being able to cope - your Lada is easy to repair, and using the advice and “tutorials”, you will conquer even such a task that is impossible at first glance.

Types of ECU memory

In order to perform its functions, the controller has to operate with a lot of data. Some of them are constantly in operation, others are loaded periodically. Therefore, memory is divided into three types:

1. PROM is a programmable read-only memory device. It contains the so-called firmware - a program that controls engine operating parameters, such as fuel injection timing, ignition angle advance control, idle speed, as well as calibration data. This type of memory is retained when there is no power. Data changes are made using reprogramming.
2. RAM is a random access memory device. Performs the same function as the RAM of a regular computer - temporary storage of information during one working session. This memory receives sensor data, stores diagnostic codes, as well as intermediate information about the activity of the microprocessor. It requires electric current to operate.
3. EPROM is an electrically programmable memory device. This type of memory is part of the standard anti-theft system. When starting the engine, the immobilizer control unit transmits codes to the Priora ECU, where password codes are located that allow or prohibit the start. In addition, the EPROM records deviations in engine operation. This memory does not depend on the supply of electricity and stores information in the controller permanently.

What data goes to the controller

The Priora ECU operates in the mode of continuous reading of information from sensors. Based on this information, the computer makes decisions about changing the operating modes of the engine systems. The types of data entering the controller are as follows:

• electrical voltage in the car network;
• presence of detonation in combustion chambers;
• vehicle speed;
• cooling system temperature;
• amount of oxygen in exhaust gases;
• air flow;
• temperature of the air entering the intake manifold;
• position of the camshaft and crankshaft;
• throttle position.

Characteristics of the immobilizer on Priora

Before you activate or disable the immobilizer yourself, let's look at the main characteristics. How to find the device, what is its operating principle and what disadvantages will the car owner have to face? We will answer these and other questions below.

Operating principle and device

The standard alarm system works on the principle of exchanging information with the control unit, depending on the situation, allowing or prohibiting engine starting. The immobilizer can only allow the engine to start if it successfully reads the key code. If the system does not recognize the key, then when you try to start the engine, the immobilizer will block the fuel pump circuit, as well as the ignition system. The procedure for exchanging information between the immo and the control unit is carried out via the K-Line diagnostic line. This means that there is a possibility that the system settings may be disrupted by interference from mobile gadgets, in particular if the ignition is activated (video author - Pavel Master).

In addition, you need to take into account that in cars with immobilizer it is undesirable to completely discharge the battery. In this case, chaotic data may be recorded in the system memory, which will require a trip to the service center. As for the device, it is identical to the APS-4 systems, which have been successfully used in VAZs since the early 2000s. The only difference is that the code itself is integrated into the ignition key, and the reader must be located in the steering column. It should also be noted that the activated immo can control the rear fog lights and power windows.

The design of the device is based on a microcontroller based on PIC16C65B, as well as a K-Line circuit designed to exchange information via the diagnostic bus. The device also includes an EEPROM memory where learning combinations are stored. It should be taken into account that the APS-6 module can be installed in the housing of the APS-4, of which, apparently, there were quite a lot of them at one time. During car production, the microchip is installed inside a standard remote control designed to control the central locking or signaling system (the author of the video is the IZO channel))) LENTA).

Location

If you don’t know where the immo is located in your car, try referring to the service instructions - it should indicate exactly where the unit is located. The difficulty in this issue is that the manufacturer can install this unit in different places, so car owners often do not know where to find the immobilizer in their car. As a rule, it is mounted in the compartment for the audio system - just below the central part of the dashboard. The electronic control unit is located in the same place.

Pros and cons of the standard protection system

Before we tell you which alarm connection points are used to activate it, we will briefly consider the main advantages and disadvantages of the systems.

Let's start with the advantages:

• if there is an immobilizer, the car owner does not need to crash into the wiring in order to ensure the safety of his vehicle;
• alarms installed additionally block only one electrical circuit when attempting to break into a car, and it will not be difficult for a professional attacker to bypass this circuit;
• inability to operate the vehicle with the immobilizer activated.

We also suggest that you familiarize yourself with the main disadvantages:

• the system may “glitch”, and failures, as a rule, occur much more often than with conventional alarms;
• lack of autostart function;
• in the case of third-party alarms, disabling the system will be easier than in the case of immo;
• no feedback.

Disabling the immobilizer without a crawler yourself

Depending on the unit model, reprogramming the ECM may require changing the installation diagram of the component elements. Such devices include M73 microprocessor modules from the manufacturer Avtel. Before performing the task, it is necessary to remove the microprocessor from the seat and connect the K-Lin adapter to it.

To remove the immo, you will need an adapter wiring harness; you will have to make it yourself.

When the transition harness is ready, perform the following steps:

1. The OpenBox program is installed on a PC or laptop. The utility is freely available. After downloading it, the software is launched; at the first stage, the car owner needs to read the standard EEPROM firmware. Factory software information is stored separately. It may be required to perform modifications or if it is necessary to roll back to its original state.
2. Then the HxD file editor is loaded. The downloaded firmware opens on the computer.
3. At the beginning of the opened text, a line is added that consists of two FF characters. Changes to the firmware are saved.
4. Then the edited file must be loaded into the memory of the microprocessor module. To perform this task, it is allowed to use ready-made versions of untrained firmware. They can be found in the public domain on the Internet.
5. The microprocessor module is disconnected and the device is installed back.

If the car is equipped with a January 7.2 block, then to deactivate it, use the diagram shown in the photo in the gallery. It is assembled on the basis of the K-Lin adapter. A positive contact switch must be added to the circuit; it will be used as an ignition switch.

The Bureau of Technical Solutions channel talked about disabling the engine blocking device yourself.

After this, the following steps are performed:

1. ChipLoader software is installed on a PC or laptop. The program version must be 1.97.7 or higher.
2. The utility is launched and the required type of microprocessor is selected in the window that opens.
3. Then you need to connect to the module; to do this, use the “Establish connection” option.
4. Information is being read from the EEPROM board.
5. In the program window, press the “Delete immo” button. As a result, the utility will automatically adjust the information written to the file.
6. The program closes. The microprocessor module can be disconnected from the computer and installed back on the car.

In M74 models, the procedure for deactivating the blocker is performed differently:

1. The battery is disconnected from the car; first, the clamp on the negative terminal must be loosened with a wrench.
2. The connector is disconnected from the immobilizer control unit.
3. A homemade harness is connected, which is made according to the diagram. It should use a double switch, since with its help the voltage can be supplied to the device in stages.
4. The assembled circuit is connected to the battery via a VAG-COM cable.
5. The first button on the switching device is activated. With its help, a pulse is sent that allows programming of the block. The WinFlashECU utility starts on the PC. In the settings window that opens, you must specify the type of microprocessor module, as well as the information transfer speed. It is recommended to select the last parameter as minimal.
6. The second button is activated. Then a message will appear in the window that opens indicating that communication with the module has been established.
7. The standard software of the control unit is saved. Then this file must be replaced with a new one. The total time to complete the task will take no more than a few minutes.
8. When the firmware is completed, the program is disabled. The power and wiring must be disconnected from the device.
9. Then the engine blocker control unit is again connected to the machine’s electrical network. When carrying out this task, it may be necessary to adapt the zero position of the throttle valve. To do this, start the engine and make a test drive. When the speed increases to four thousand per minute, the power unit brakes. In this case, second gear must be engaged.

Photo gallery

Connection card for the M73 unit using a K-Lin adapter Electrical diagram for connecting M72 models with a battery This diagram is used to connect the M74 microprocessor unit

Video “How to reprogram a standard alarm with your own hands?”

Detailed instructions for reprogramming the standard alarm are given in the video below (the author of the video is the Priorovod channel).

• We study the main malfunctions of the immobilizer
• General check before troubleshooting
• Main signs of immobilizer malfunctions
• What are the types of immobilizer malfunctions?
• How to fix immobilizer faults

Imagine a modern car without a security system thought out to the smallest detail. True, very difficult. Vehicles from the beginning of the last century immediately come to mind. But now you need to protect yourself as much as possible from intruders who are trying to steal your “pet,” even if it is in the garage.

Perhaps one of the best and most thoughtful solutions to modern car security is an immobilizer. And although repairing this device, like every complex electronic device, is not easy, it is still more reliable with it. And remember that there are specialized agencies and service centers that will help you and carry out restoration. Alternatively, you can try to troubleshoot the immobilizer yourself by first studying the instructions for it in detail.

General check before troubleshooting

Before performing general troubleshooting on your vehicle's immobilizer, check the following and correct as necessary:

— if the battery is discharged, charge it completely, and then start looking for problems with the immobilizer itself;

- if the ignition key is not original, use one approved by the brand of your car, and then start working on the immobilizer;

— remove the key and look for problems with it only;

- remove additional electronic gadgets or parts that may interfere, and look for malfunctions in the immobilizer system.

Main signs of immobilizer malfunctions

The main signs of malfunctions that should not be ignored are the following:

— when turning the key, the starter does not respond;

- when you turn the key and hear the starter moving, but the engine is silent;

— the dashboard signals with a corresponding light and sound;

— the car does not respond to pressing the corresponding button on the key fob (unless, of course, the problem is due to dead batteries in it).

Everything listed above is the most common signs that the immobilizer requires specialist help: software restoration or firmware updating. If you ignore such signals of malfunctions or entrust the task to amateurs, then everything can develop into more serious problems.

What are the types of immobilizer malfunctions?

The following types of immobilizer malfunctions are distinguished:

1. Software malfunction, which implies the destruction of the program in the engine ECU, immobilizer, or key chip. This problem can be resolved. Restoring the program of the listed systems helps. The exception is the chip key, which sometimes has no duplicates.

2. A hardware malfunction in which microcircuits fail or irregularities occur in the wiring of any system component. In this case, the fault must be diagnosed and corrected.

How to fix immobilizer faults

The immobilizer is structurally designed in such a way that a problem that occurs with one of its units will disable the entire system of the device. But of all the faults, the most common ones can be identified.

Insufficient electrical contact between the receiver and the antenna

In this case, the immobilizer malfunctions extremely often. There have been cases when it was possible to start the car only after the twentieth attempt. This problem occurs due to shaking, the antenna and receiver connectors are made poorly, the contacts are oxidized or dirt and grease have gotten on them.

In this case, the contact does not disappear immediately, but after a certain period of time, which depends on many factors. To fix this problem, you need to disconnect the receiver and antenna, turn off its power, then treat it with a special agent that eliminates contamination and oxidation. If necessary, it is better to tighten the antenna contacts.

Poor contact of one of the electrical wiring connectors

This problem also occurs if the antenna connectors are dirty. To eliminate it, dismantle all immobilizer wiring and check the condition of each wiring connector and blocks. Clean them with a special cleaner and tighten as necessary.

Signs of the need for internal combustion engine repair

The reasons why the operation of the engine is disrupted are arranged in a small list, starting with refusal to start and ending with floating idle speed (this problem was removed on the 127 “engine”). Not all breakdowns end in capital damage - sometimes it’s enough to add oil, sometimes it’s enough to adjust the ECU settings.

Compression reduction

A decrease in cylinder compression below 16 atmospheres is a bad sign. Such a high limit corresponds to a compression ratio of 11.

Knocks in the engine

Engine knocks can come from several points. These could be hydraulic compressors, timing belt rollers or pins. The knocking noise could also be caused by low oil level. The answer to the question will be given by a thorough detailed inspection of all parts of the unit and checking the oil level.

Blue smoke from the exhaust pipe

The blue smoke that comes from the exhaust pipe appears when oil enters the combustion chamber. It can leak either from the valves or from under the piston. The result is the same: the oil is eaten up and blue smoke pours out of the chimney. Once the leak is located, half the problem will already be solved.

Troit motor

Sometimes in the cold the engine may stall - don’t be alarmed by this, because it may simply be one of the spark plugs that fails. In this case, we advise you to simply restart the engine and it will stop running.

How much does it cost to overhaul a Priora engine - average price

Self-repair of a Priora engine with 16 valves costs an average of 16-20 thousand rubles. The cost depends on the severity of the breakdown and may be lower or higher than this average range. Repairing a Priora engine can be entrusted to the wrong hands, but then you will have to pay for the work - sometimes the cost of repairs reaches as much as 40 thousand rubles.

This is an unreasonably inflated figure, because, as practice shows, you can rebuild the engine on a Priora, working at a moderate pace, in just three days - and three days of work is definitely not worth that kind of money. Don’t be afraid of not being able to cope - your Lada is easy to repair, and using the advice and “tutorials”, you will conquer even such a task that is impossible at first glance.

Standard ignition switch - article number, price, how it works, device

The module on Priora does not work directly with the components that initiate the engine start. For it to work properly, you need to wait a few seconds before starting until the fuel pump creates the required pressure. On the Priora, only wires are connected to it - the paths along which messages pass from the ignition switch to the electronic control unit.

The ECU of the Priora car just receives data about the position of the key and can crank the starter if this operation is “not blocked”. Due to a breakdown, it can only turn on the ignition, leaving the battery to work.

After the ECU key has turned, it gives commands to several parts at once. When you turn on the second position, let the fuel pump run for 5 seconds so that it pumps fuel from the tank closer to the engine.

When the starting process itself begins, the starter rotates - the force it creates goes to the crankshaft;

the ignition system element converts the low voltage current coming from the battery into a high one so that the spark plugs are “charged” and give a spark at the right moment;

The injector creates the first batch of air-fuel mixture to put it into the chamber, where everything is ready for it - the pistons “move”, the spark plugs spark.

In the module itself, everything is simple - there is a cylinder with a return spring inside, between the coils there is a locking ball that does not allow it to curl up more than necessary, and a locking rod holds the structure in place. Finally, as a complication of the entire system, there is an “immobilizer” - an anti-theft system that you can install yourself. It just takes a long time to set it up.

A regular kit with a master key and several door cylinders (with an immobilizer) costs from 1,800 - 2,000 rubles, catalog number - 2170-3704005. A set without a master key (without an immobilizer) can be purchased for 1,200 – 1,400 rubles, article number -2170-3704006.

Checking the functionality of the controller

After replacing the controller or resetting the controller using a scan tool, you must perform the Throttle Zero Adaptation procedure and the Misfire Diagnostic Adaptation procedure.

The procedure for adapting the throttle zero of Priora, Kalina: with the car standing, you must turn on the ignition, wait 30 s, turn off the ignition, wait until the main relay turns off.

Adaptation will be interrupted if:

• the engine turns over;
• the car is moving;
• the accelerator pedal is pressed;
• engine temperature is below 5 °C or above 100 °C;
• Ambient temperature is below 5 °C.

The procedure for adapting the misfire diagnostic function of Priora, Kalina:

• warm up the engine to operating temperature (controlled parameter TMOT_W = 60...90 °C);
• accelerate the car in 2nd gear until higher crankshaft speeds are reached (NMOT-W = 4000 min-1) and perform engine braking (NMOT-W = 1000 min-1);
• Perform engine braking six times in one trip.

It is recommended to replace the control unit with a new model with the immobilizer function not activated. This way the ECU will not prevent the engine from starting. To activate the anti-theft system, you need to teach the immobilizer new keys.

Also watch a useful video on disassembling and repairing the ECU:

The electrical package control unit, or the so-called Priora comfort unit, is a complex electrical device. Its basis is a printed circuit board with numerous microcircuits, relays, control drivers and other elements soldered to it.

Content

How to activate the immobilizer?

Before starting use, it is recommended to activate the immobilizer.

In order to do this, you must follow these instructions:

1. Take both standard keys, get behind the wheel and close the door behind you.
2. Insert the key with the red mark (training) into the lock and turn on the ignition.
3. After six seconds, turn off the ignition system. The indicator lamp in the instrument cluster will flash approximately 5 times per second, which is a sign of a normal learning process. If this does not happen, there may be problems with the immobilizer system or faulty components.
4. While the warning light is flashing, you must remove the red key, insert a regular key into the lock and activate the ignition. This procedure should be completed within six seconds. The buzzer will confirm that the training has been completed correctly with three short beeps.
5. Wait another six seconds, after which the buzzer should sound two additional signals. If this does not happen and the warning light stops flashing rapidly, then the learning process has failed and should be started again. If re-learning is also unsuccessful, then you should look for a malfunction in the system or key, which could have been previously trained for a different immobilizer.
6. If training is successful, turn off the ignition. If it is necessary to train additional keys, then such actions are performed with each one.
7. If you do not need to register additional keys, then immediately after the sound signals you must turn off the ignition and remove the regular key and replace it with a red one.
8. Turn on the ignition and receive confirmation in the form of three beeps with the buzzer.
9. In six seconds, two more signals should pass. After this, you can turn off the ignition, but do not remove the key from the lock.
10. Six seconds after turning off the ignition circuits, the buzzer should sound once and the flashing frequency of the lamp should increase.
11. After this, turn on the ignition (within 5...6 seconds) using the red key and turn it off after three seconds.
12. After a few seconds, the buzzer should sound (three beeps) and the lamp on the instrument cluster should go out. The ignition can be turned on again no earlier than after 10 seconds. When using some controllers, sound signals may appear immediately when the ignition is turned off.

Unlock process

When the immobilizer is active, the ignition must be turned on.
At the same time, the immobilizer lamp on the instrument panel will begin to blink, indicating that the immobilizer has blocked the engine from starting. What to do next? Press and hold the gas pedal, after which the lamp will stop flashing. Now we need to enter the code using the on-board computer button. To do this, the button must be pressed in an amount equal to the first digit of the code. Release the gas pedal, the light will start flashing again. The action described above must be carried out for all numbers.

Once all the code has been entered, the lamp will remain on all the time. This is a good sign that the engine is unlocked and can now be started. There is no need to be surprised if, after pressing the button on the key with the transmitter, the immobilizer blocked the engine from starting on the Prior. What to do in this case? It's okay, it's okay.

If you enter the wrong code three times in a row, the next attempts are possible only after 15 minutes. To configure other keys, you need to unlock the immobilizer. His light should not be on. Then you need to turn the ignition on and off, quickly press the central locking control button. The doors will close and open again (or vice versa). The immobilizer light will come on. Within the next 15 seconds you need to do the following:

1. Point the IR key at the signal receiver and press the key button 2 times with an interval of one and a half seconds. The doors should open and close.
2. Now we need to carry out similar actions with the keys that we want to program for the current immobilizer.

All actions need to be carried out only once for each linked key. Note that this is a generalized process. If the immobilizer has blocked the engine of a Nissan Almera or another car from starting, then perhaps unlocking and binding the keys is carried out a little differently. In any case, information about this is in the instructions.

How to replace the Priora ECU

There can be many reasons for replacing the controller: the desire to install another model that can work with more efficient firmware, failure, incorrect operation.

You can find out which ECU is on the Priora using the diagnostic method, or by using the firmware identifier, which can be checked on a special website. Bosch M 10 and “January-7” controllers are installed on cars.

In order to change the ECU, you need to do the following:

1. Disconnect the on-board system from the battery. To do this, simply remove the negative terminal.
2. Remove the plastic lining of the tunnel on the right side.
3. Push the bracket securing the connector with the bundle of wires all the way.
4. Remove the block with wires.
5. Unscrew the 2 nuts in the place where the Priora ECU is attached to the bracket.
6. Lift the controller up and remove it through the right side.

As can be seen from the description, the procedure is very simple and does not take more than 5-10 minutes. Installation occurs in reverse order.

Installing the controller

1) For the LADA PRIORA family , attach the bracket to the controller and secure it with screws. Screw tightening torque 1.2…1.6 Nm (Phillips screwdriver, Phillips head, torque screwdriver). Install the controller on the car and secure it with nuts. The tightening torque of the nuts is 1.9…4.5 Nm (spanner 8, interchangeable head “8”, torque wrench).

For the LADA KALINA family , attach the bracket to the controller and secure it with screws. Screw tightening torque 1.2…1.6 Nm (Phillips screwdriver, Phillips head, torque screwdriver). Install the controller on the car and secure it with a screw. The tightening torque of the screw is 1.7…3.5 Nm (Phillips screwdriver, Phillips head, torque screwdriver).

For the LADA 4x4 family , install the controller on the car and secure it with nuts. The tightening torque of the nuts is 1.9…4.5 Nm (spanner “8”, interchangeable head “8”, torque wrench).

2) Connect the wiring harness connectors to the controller.

3) Install the instrument panel console screen into place (using a Phillips screwdriver). For the LADA 4x4 family, install the left front upholstery.

4) Connect the wire to the negative terminal of the battery (spanner “10”).

Types of ECU (esud, controller). What kind of ECUs are installed on VAZ?

"January-4", "GM-09"

The very first controllers on SAMARA were January-4, GM - 09. They were installed on the first models before the year 2000. These models were produced both with and without a resonant knock sensor.

The table contains two columns: 1st column – ECU number, second column – brand of “brains”, firmware version, toxicity standard, distinctive features.

VAZ 2113-2115 from 2003 are equipped with the following types of ECUs:

"January 5.1.x"

The following types of hardware implementation are distinguished:

• simultaneous injection;
• in pairs - parallel injection;
• phased injection.

Interchangeable with “VS (Itelma) 5.1”, “Bosch M1.5.4”

"Bosch M1.5.4"

The following types of hardware implementation are distinguished:

• simultaneous injection;
• in pairs - parallel injection;
• phased injection.

Interchangeable with “VS 5.1”, “January 5.1.x”.

"Bosch MP7.0"

As a rule, this type of controller is released onto the market and installed at the factory in a single volume. Has a standard 55-pin connector. Capable of working with recrossing on other types of ECM.

"Bosch M7.9.7"

These brains began to be part of the car at the end of 2003. This controller has its own connector, which is incompatible with connectors produced before this model. This type of ECU is installed on VAZ with EURO-2 and EURO-3 toxicity standards. This ECM is lighter weight and smaller in size than previous models. There is also a more reliable connector with increased reliability. They include a switch, which will generally increase the reliability of the controller.

This ECU is in no way compatible with previous controllers.

"VS 5.1"

The following types of hardware implementation are distinguished:

• simultaneous injection;
• in pairs - parallel injection;
• phased injection.

"VS 5.1" is interchangeable with "Bosch M1.5.4", "January 5.1.x".

"January 7.2."

This type of ECU is made with a different type of wiring (81 pins) and is similar to Boshevsky 7.9.7+. This type of ECU is produced both by Itelma and Avtel. Interchangeable with Bosch M.7.9.7. As for the software, 7.2 is a continuation of January 5th.

This table shows variations of the BOSCH ECU, 7.9.7, January 7.2, Itelma, installed exclusively on the VAZ 2109-2115 with a 1.5L 8kL engine.

Diagnostics with ELM-327 scanner

Thanks to Chinese engineers, car diagnostics have become much easier and cheaper. Not long ago, a universal internal combustion engine scanner appeared on Chinese websites, which is suitable for almost all cars with OBD-2 connectors.

The ELM 327 scanner on the AliExpress website costs from 5 to 10 dollars, depending on the version.

This gadget is divided into two types and you should pay special attention to this when purchasing. ELM 327 works with our domestic cars only on version 1.5

Therefore, you need to purchase an ELM-327 v1.5 scanner. If you purchase version 2.1, then work with domestic cars is not guaranteed.

It should also be noted that this scanner only works in conjunction with a smartphone. If you have an Android smartphone, then you just need to buy a scanner with Bluetooth only.

If your smartphone is based on iOS, then you need to purchase a scanner with a Wi-Fi module, since Apple smartphones do not allow connecting third-party devices via Bluetooth.

Self-diagnosis systems

Like any computer, the Priora ECU has feedback from the user.

The driver learns about problems using signal codes, which can be seen in two ways: using an additional on-board computer connected to the diagnostic connector, and on the instrument panel after performing simple manipulations.

For self-diagnosis, you can install the following devices:

1. State X 1 P Priora. A small device that is inserted in place of a standard button. Has an LED display with 3 characters. In addition to the diagnostic function using 30 parameters, it allows you to warm up the spark plugs during cold periods, independently regulate the temperature at which the cooling system fan turns on, and reset engine errors.
2. Priora State Matrix. A more serious on-board computer. It is placed in place of the standard clock and has a graphic display of 128 x 32 pixels.

In addition to the functions listed on the previous computer, the device can work with gas equipment, reading gas consumption. The “Afterburner” function allows you not only to reset engine errors, but also to roll back the controller to its factory state, thereby resuscitating it. After activating this option, the “Priors” ECU mode will turn on, which was set at the factory. This bookmaker also has the ability to update the software.

Multitronics C-900. Universal on-board computer. Can be installed in different places. It has enormous capabilities both in diagnostics and adjustments. Suitable for a wide range of cars. It has a 480 x 800 pixel LCD display and the ability to change settings directly from your home PC.

How to perform diagnostics using a standard on-board computer

In the absence of additional diagnostic tools, errors that are read by the Priora ECU can be displayed on the instrument panel in the standard way. To do this you need:

1. While holding the mileage reset button, turn on the ignition. After pressing for 4 seconds, the instrument panel begins to move (all indicators light up, instrument arrows rotate around the axis several times, the LCD display turns on all registers). This indicates that the self-diagnosis mode has turned on.
2. On the right steering column switch, the Reset button selects the position for displaying the firmware version, error code, and error reset.

If you need to get rid of an engine error, in reset mode, press Reset and hold the button in this position for 3 seconds.

Interpretation of the symbols for the rear wiring harness of the VAZ Priora

This part is organized to supply power to the main instruments and engine control system of the Lada Priora. From here, voltage is supplied to the main components, units of the vehicle’s power plant, as well as control sensors and ECUs. The standard electrical circuit connection system (pinout) looks like this:

• 1 – ECU power supply;
• 2 – main block of the electronic system to the dashboard;
• 3 – distribution board;
• 4 – speedometer;
• 5 – road surface roughness sensor;
• 6 – indication of pressure in the engine crankcase;
• 7 – TPS;
• 8 – DTOZH;
• 9 – indication of antifreeze temperature sensor;
• 10 – mass air flow sensor;
• 11 – control XX;
• 12 – main relay of the fuel pump;
• 13 – VT circuit fuse;
• 14 – relay BZ;
• 15 – fuse of the above circuit;
• 16 – ECU fusible link;
• 17 – DPKV;
• 18 – power supply for mass air flow sensor;
• 19 – phase distribution;
• 20 – mixture detonation sensor;
• 21 – EMC for purging the adsorber;
• 22 – diagnostics of the air flow sensor;
• 23 – power supply to the ignition coil;
• 24 – supply voltage to spark plugs;
• 25 – power supply to fuel injectors;
• 26 – terminal from the ignition coils to the ECM;
• 27 – feedback from 26;
• 28 – ECM connector to the injection system;
• 29 – response to the previous output;
• A – phase on the battery;
• B1/2 – ignition mass;
• C1 – mass from short circuit.

The rear part of the electrical wiring chain is responsible for the vehicle's lighting and peripheral systems. This includes lights, locks and windows. The pinout of tips and terminals looks like this:

• 1 – dashboard response;
• 2 – power supply for the door behind the driver;
• 3/28 – power supply for the front passenger panel equipment;
• 4 – maintenance of power windows and door locks;
• 5-6 turn signals;
• 7 – interior lighting;
• 8 – handbrake indication switch;
• 9-10 – aft dimensions;
• 11 – temperature inside the car;
• 12-15 – circuit breakers for lighting the interior of the machine;
• 16/17 – power supply to the devices of the aft right and front left doors, respectively;
• 18/19 – voltage to the rear right and left speakers, respectively;
• 20 – cigarette lighter power core;
• 21 – EBN;
• 22 – contact group of the cargo compartment lighting circuit breaker;
• 23 – heated rear windshield;
• 24 – luggage compartment lighting lamp;
• 25 – additional stop;
• 26 – power line to the electric lock of the luggage compartment lid;
• 27 – power supply for rear number plate illumination;
• A1-4 – mass;
• ХР1/3 – electrical package power controller.

The small harness, located in the luggage compartment, has only three terminals:

• 1 – power supply to the stern license plate lights;
• 2-3 – license plate lighting lamps;
• 4 – trunk lid lock motor.

The harness is routed to supply power to the driver's door equipment. There is an output to the key panel installed in the armrest. There are six elements in total:

• 1 – additional terminal to the rear of the machine;
• 2 – line to the left fuse;
• 3 – electric window drive;
• 4 – armrest control module;
• 5 – door lock drive;
• 6 – rear view mirror control chip.

The unit duplicates the voltage supply from the center console to the passenger keypad located on the right side of the car. There are only seven connectors here:

• 1 – continuation of the main highway to the rear;
• 2 – terminal of the line to the right front speaker;
• 3 – window lift drive;
• 4 – electric window lift button;
• 5 – door lock drive;
• 6 – control of the position of the rear view mirror, as well as heated glass;
• 7 – continuation of the highway to the rear.

Read more: Connecting a Pioneer radio by wire colors, diagram and video instructions

Circuit breakers

LADA PRIORA 21723

F1 (green) 30 Electronic engine management system F2 (blue) 60 power package control unit, engine fan, heated rear window, ignition switch unloading relay F3 (blue) 60 cooling fan power supply circuit, horn, alarm, ignition switch, instrument cluster, interior lighting, brake light, cigarette lighter F4 (blue) 60 Priora generator F5 (red) 50 Electromechanical power steering F6 (blue) 60 Generator

F1 (blue) 15 Main relay and starter interlock circuit F2 (brown) 7.5 Controller power circuit F3 (blue) 15 Electric fuel pump fuse K1 - Ignition relay K2 - Electric fuel pump relay

F1 25 Electric radiator fan of the cooling system F2 25 Heated rear window Priora F3 10 High beam right F4 10 High beam left F5 10 Sound signal F6 7.5 Low beam (left) F7 7.5 Low beam (right) F8 10 Alarm signal F9 25 Heater Priora F10) 7.

5 Interior lighting, instrument cluster, brake light F11 20 Windshield wiper F12 10 Terminal 15 devices F13 15 Cigarette lighter F14 5 Side light left, license plate light, trunk light F15 5 Side light right F16 10 Terminal 15 ABS F17 10 Fog light (PTF) left F 18 10 Fog lamp (PTF) right F19 15 Seat heating F31 or F27 30 Electrical package control unit