Standard on-board computer on the VAZ-2112: functions and operating instructions

The VAZ-2110 on-board computer is used to control vehicle systems. In its original configuration, the car leaves the factory without a smart gadget, but this does not prevent the driver from purchasing it. Before this, it is necessary to evaluate the technical characteristics of the models on the market. Each of them is designed for specific operating conditions of the VAZ-2111, 10 or 12.

Functional purpose of the device

The development of the technical component of vehicles has led to an abundance of electronic and mechanical devices that control the operation of the car. Each of them reflects one or another indicator, which a person does not always have time to analyze. This is where the VAZ on-board computer will help, taking control of what is happening. In addition to monitoring the operation of vehicle systems, it will promptly inform the owner about a failure.

Another advantage is that the standard on-board computer analyzes the technical condition of the car within the specified parameters. In practice, this means that the driver can ask a question regarding the presence of components or assemblies whose performance exceeds the technical norm. Preventative analysis reduces the likelihood of downtime due to technical failure. The VAZ trip computer differs in the available options depending on the configuration:

  1. Carburetor is a budget option that does not have sufficiently wide functionality. Installation does not take much time, and operation is simple. It is difficult to find it on the market due to low demand among VAZ-2110 owners.
  2. Injection - there are various options on the market that take into account the needs of drivers. Among the main advantages is the ability to conduct in-depth diagnostics. For example, if the car does not start because the injector has failed, the system will notify you in advance. The cost of the on-board computer depends on the configuration.
  3. Universal - installation is carried out on a VAZ-2111, 10 or 12 without taking into account technical specifications. Installation is carried out behind the rear view mirror or windshield.
  4. Adapted - selected taking into account the make and model of the vehicle. Installation is carried out in a strictly designated place, which the instructions will help you find.

Rules for driving a car with an injector

A car equipped with an injector is less susceptible to ambient temperatures. However, in severe frost, the injection Lada also experiences difficulty starting. Here it is worth using the on-board computer with the function of heating spark plugs. Every time the temperature drops below a certain value and the car is turned off, a special heating of the tips is carried out to ensure a stable engine start.

Also, the VAZ engine sometimes overheats, which can cause valve burnout and costly overhauls. However, this is possible if the cooling system is faulty. If necessary, you can activate the Tropic function for the on-board computer of the VAZ 2110. When the temperature reaches more than the value set by the owner, the forced cooling fan turns on.

Installation recommendations

The efficiency of the device is determined at the stage of selection and subsequent installation. An on-board computer (BC) is selected for the VAZ-2112, which collects and analyzes incoming information. Regardless of the model, it is equipped with a Check Engine light. When it is triggered, the bookmaker will independently determine that it is not working.

Experienced drivers do not advise overpaying for sensors of humidity and outdoor temperature levels, a chronometer, and an alarm clock. These indicators are easy to obtain using a standard VAZ-2110 thermometer. Once the driver has made his choice, installation can begin. First, you should study the passport supplied with the device, which will tell you how to connect the on-board computer.

Correct operation


With the right approach, the installed BC will not cause problems. However, if it shows unreliable information, then it is worth removing the on-board computer and checking it for serviceability. How to remove the device is clear. After all, it has a disconnectable connector, so you need to dismantle it in the reverse order. The main thing to remember is that this is a fragile thing and can be broken.

After dismantling, you should check the integrity of the soldering and wires and eliminate any breaks . Afterwards, put the device where it was before and use the working device again.

Troubleshooting BC

Malfunctions occur with BCs of various modifications. It would be useful for the owner to know what to do in such cases. Many failures occur when the on-board computer was not installed properly. First, you need to check the reliability of the connections. Secondly, there is a high probability of accidental damage or pinching of the K-line. Multitronics itself will report this, displaying obviously incorrect data.

You can deal with the problem yourself. If it is connected to a damaged K-line, then you need to purchase a new wire for the VAZ-2111 at a car store or on the market.

It is inexpensive, and the entire replacement procedure will take no more than 60 minutes. More time will be required if the problems of the on-board computer 2110 are caused by broken contacts. It is necessary to disconnect the device after performing a visual inspection. If bent plugs are still present, you should select new ones from the store and resolder them.

Using the BC on a VAZ passenger car allows the owner to always be aware of the technical condition of the car. The device is selected based on needs. Its effectiveness depends on correct installation.

Many owners of domestically produced cars, including the VAZ-2110, are trying in every possible way to improve their cars. And if cutting off an extra coil from the rear springs or screwing a “bench” onto the trunk lid is nothing more than “collective farm tuning,” then installing an on-board computer is a completely justified step. An on-board computer is a useful tool with which you can track engine operating parameters, current and average fuel consumption, speed and other equally important information.

What can a bortovik do?

Depending on the model, the functionality of the on-board devices may vary significantly. The simplest ones display information about the outside temperature, driving speed, current and average fuel consumption, the distance that can be driven with the fuel remaining in the tank and some other data. In addition, the on-board computer displays the voltage in the on-board network and the vehicle’s engine operating parameters, namely crankshaft speed, air flow and throttle opening angle. This data helps identify problems earlier.

Thus, there is no need to go to diagnostics and connect an error scanner every time the “Check Engine” indicator lights up on the dashboard. In addition, it can reset errors stored in the electronic engine control unit and completely erase its memory. This is necessary in cases where, even after troubleshooting, the motor continues to operate incorrectly due to errors.

Another equally useful function that not all on-board vehicles have is warming up the spark plugs. This procedure takes about a minute and in severe frost makes it much easier to start the engine, because in addition to heating up the spark plugs, it starts a chemical reaction in the battery, which also “warms up” in this way.

There are other functions that the on-board computer can perform, which are not so necessary, but sometimes useful. Thus, some models remind you that it is necessary to carry out vehicle maintenance or renew your insurance. Many on-board devices can work as an alarm clock.

Installing an on-board computer allows you to solve another problem that is inherent not only to VAZ-2110 cars, but also to many other models of the Volzhsky Automobile Plant, namely, a fuel level sensor that often fails or simply gives incorrect readings. The on-board computer is usually configured in such a way that either it transmits information about the amount of fuel in the tank from the fuel level sensor, or it is calibrated manually, then the device independently calculates the remaining fuel. The only thing that is required from the driver in the future is to manually set the amount of gasoline after each refueling.

How to install an on-board computer in a VAZ-2110 car

On the VAZ-2110 it is installed instead of the standard clock. Included with most device models, as a rule, is a block with wires, which must be connected to a special connector hidden inside the dashboard. Through this connector, the on-board computer is connected to all the main components of the VAZ-2110 on-board network.

In order for the on-board vehicle to function fully, it must be connected with a separate wire to the K-line of the car. Via the K-line, the device is connected to the engine control unit and receives data about errors that occur during operation and all diagnostic information (air consumption, crankshaft speed, etc.).

One end of the wire is connected to the on-board computer contact, and the other to the corresponding contact of the diagnostic connector. The VAZ-2110 has two types of diagnostic connectors: rectangular GM (on cars with Euro-2 environmental standard) and trapezoidal ODB-II (on cars with Euro-3). The connectors are arranged in such a way that the key is at the bottom.

  • The K-line output pin of the GM connector is the first on the left in the top row;
  • for ODB-II it is second from the right in the top row (the first contact on the right is empty).

Some devices have two additional contacts to which the ambient temperature sensor is connected. Before installing the on-board computer, this sensor must be taken outside the cabin and placed so that dirt and water from the road do not fall on it, and in addition, it must be located as far as possible from the engine so that the readings are not distorted. It is best to secure it under the bumper.

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Block for connecting the trip computer (BC, in my case the device is Multitronics SE-50).

VAZ cars of the tenth family have a standard connector for connecting the on-board computer to the car. That is, to install the BC, everything is already provided by the factory, this is the first thing that is needed. The second is connecting the control line from the electronic control unit to the trip computer. Connection is carried out according to the following instructions:

Some of the wires of the trip computer connector had to be restored because they were torn out; it was not originally installed in the car.

The automatic switching on of the interior lights was implemented through the on-board display unit, but it is now missing. Therefore, to preserve this function, it is necessary to connect the following contacts according to the diagram:

What standard trip computers exist?

Option 1. In the instrument cluster.

Option 2. Installed instead of a small plug next to the ACS unit

These were installed on “luxury” dozens. There are models AMK 211000 without diagnostics, and AMK 211001, AMK 211002 with diagnostics. You can find out which one you have by looking at the numbers on the back cover. To do this, naturally, the MK must be removed. If on the back there are the inscriptions AMK-211001 or AMK 211002, and in clock mode, when you press the “clock” button, the inscriptions Err appear and then two more - great. You have a full-fledged bookmaker.

If these are the inscriptions:

Unfortunately, this is a BC that either lacks diagnostic capabilities or has “cut-off” firmware.” Craftsmen resolder and reflash such models, but in my opinion they are not worth it.

It is very easy to remove such a MK. We disconnect the terminal of the “negative” wire from the battery terminal. We pry it off with a screwdriver...

remove the MK from its seat....

....disconnect the wire block from it.

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