Old and new VAZ-2112 diagnostic connector: pinout, where is it located?

A Ground B L-line for engine diagnostics (including the line for reading slow self-diagnosis codes), ABS (8192-Baud Serial Data) (not always wired) C AIR (not always wired) D SES-Lamp – self-diagnosis lamp line (not always wired) E K diagnostic line (160-Baud Serial Data) F TCC (not always wired). On some models - +12V power supply G Fuel pump control (not always wired) J K-line for airbag diagnostics (AirBag) (8192-Baud Serial Data) M K-line for engine diagnostics, ABS

16-pin trapezoidal OBD-II connector (lada Obd-2 16-pin)

2) J1850 Bus+ 4) Body ground 5) Signal ground 6) CAN-High line, J-2284 7) K-line diagnostics (ISO 9141-2 and ISO/DIS 14230-4) 10) J1850 Bus- 14) Line CAN-Low, J-2284 15) L-line diagnostics (ISO 9141-2 and ISO/DIS 14230-4) 16) +12V power supply from battery

When is diagnosis necessary?

Computer diagnostics involves reading error codes, erasing them and correcting them. For this, various diagnostic adapters and systems are used. These include multifunctional stands, OBD connectors, portable readers and other devices. Thanks to diagnostic equipment and software, the slightest malfunctions in the vehicle’s control system and its main components are detected.

Using diagnostic systems, you can change parameters to increase the power characteristics of the machine. If a new car model comes out, you can reprogram the functions for the new equipment.

Computer diagnostics are usually carried out in the following cases:

• indicators on the dashboard light up, signaling any malfunctions;
• the driver has suspicions of a malfunction of any components or systems;
• check the condition of a used car before purchasing;
• Experts recommend diagnostics at least once a year.

Diagnostics using electronic equipment makes it possible to obtain real information about the technical condition of the car.

Which computer can be used for diagnostics?

The diagnostic software does not require PC resources; for this reason, you can use any computer with an operating system no lower than Windows XP. It is very convenient to use a laptop or netbook for diagnostics, since the cable length is limited.

A scanner for a VAZ is as necessary a tool in a car enthusiast’s arsenal as a regular wrench. The advantages of using it are obvious, you can quickly assess the condition of your car’s systems, identify the cause of the malfunction, many of them can be eliminated yourself without contacting a service station. It is also beneficial economically. The price of a diagnostic k-line adapter is no more than the cost of a one-time visit to a service center or service station.

You have set yourself the task of learning how to perform diagnostics and gaining access to activating hidden functions on a Ford car, and reducing the cost of visiting a service station. For this, today you have every opportunity. Of course, this will require some preparation.

Instructions for performing diagnostics

To diagnose a VAZ, a computer or diagnostic equipment is connected using a diagnostic connector.

Computer diagnostic socket

All broadcast codes are read by the scanner. They are stored in the controller’s memory until its power is turned off. Using special software, specialists decipher the codes and determine what malfunctions and failures exist in the system.

The diagnostic procedure consists of several stages:

1. Suspension diagnostics. This procedure is performed if uneven tire wear, knocking or humming is detected when driving at a constant speed, making sharp turns, or on an uneven road. And also in case of premature activation of the ABC, increased free play of the steering wheel.
2. Engine check. The power engine should be diagnosed if it runs intermittently, takes a long time to heat up, is difficult to start, as well as with increased fuel consumption, loss of power, the appearance of extraneous noise, or a decrease or increase in idle speed. During diagnostics, the electrical supply and ignition system are checked, and the pressure in the cylinders is measured (the author of the video is Pavel Master).

An automatic transmission is diagnosed in the following cases:

• no gear is engaged;
• When changing gears, noises, jerking, and slipping appear;
• increased fuel consumption;
• Oil leak detected.

During diagnostics, the scanner reads error codes of the automatic transmission control system, evaluates the readings of the throttle position and cooling system temperature sensors, as well as the position of the automatic transmission selector.

First of all, diagnostics are performed using a scanner. The scanner readings are deciphered and conclusions are drawn about problems in the system. At the second stage, analog testing is carried out - wiring, contacts, and batteries are checked. Next, an online check is carried out. The screen displays indicators of sensors, fuel injection, etc. Then the data obtained during posting is analyzed. At the last stage, the error codes stored in the controller’s memory are erased. After this, reinitialization is necessary.

Pinout

If self-diagnosis is carried out, then you need to know the lining of the block. Pinout is the purpose of the contacts that are located on the block. Below is the OBD pinout.

Pinout of OBD II device for VAZ

“A” is the contact responsible for connecting the ground; “B” is the contact that is necessary to connect the L-Line; “M” is a contact that is used to connect K-Line; “G” - contact responsible for controlling the fuel pump; “H” - contact for +12V power supply.

You can diagnose your car yourself by connecting a scanner or other diagnostic equipment to the diagnostic connector. This will save time and money on visiting a car service center.

Description of connector types

In the early 2000s, there were no strict requirements for the outer shape of the connector, and many automakers assigned the device configuration themselves. Today, there are two types of OBD 2 connector, designated Type A and Type B. Both plugs have a 16-pin output (two rows of eight pins) and differ only in the central guide grooves.

The pins in the block are numbered from left to right, with contacts numbered 1-8 in the top row, and numbers 9 through 16 in the bottom row. The outer part of the housing is made in the shape of a trapezoid with rounded corners, which ensures reliable connection of the diagnostic adapter. The photo below shows both device options.

Connector types - Type A on the left and Type B on the right

Pinout and where is the diagnostic connector for VAZ-2112

Diagnostics of modern car models is carried out using a special diagnostic connector. It connects to a computer, which analyzes the current state of the vehicle, determines the malfunction and indicates it. If you have the appropriate equipment, you can look for breakdowns even at home. However, not all VAZ-2112 owners can find the diagnostic connector right away. Today we’ll talk about its location on the classic panel and on the Europanel. In which part of the car should I look for the required socket?

Programs for diagnosing VAZ cars

Due to the fact that there are many of them, let’s name a few of the most common and advanced:

1. KWR_D is one of the most reliable. Its advantage is that there are many useful adjustments. We list the main functions: - control of mechanisms (nozzles, coils, fans, etc.), - monitoring of vehicle parameters.
2. ICD 1.2.0.1 is the same (the program is free).
3. Diagnostic Tool vl.31.2 - control functions, there are adjustments.
4. AVTOVAZ NEW is the most modern option. The advantages are immobilizer control and adjustments.
5. Sens Diag - comprehensive diagnostics.
6. Motor tester is the same.
7. My Tester VAZ is the same with direct adaptation to VAZ models.

All of these programs work with Bosch blocks.

How to diagnose a VAZ car using a laptop:

1. Complete diagnostic equipment (laptop, connection cable, adapter),
2. Install the appropriate program and drivers on the laptop,
3. Using a cable, create a logistics chain “laptop - adapter - ECU - car computer”,
4. Setting up a connection between a laptop and a car computer,
5. Turning on the engine
6. Diagnostics.

Where to look for the connector

It is important to know that on different cars the required socket is located in different parts of the car. Moreover, on some AvtoVAZ models it may be in a completely different place compared to another car. Let's look at several VAZ cars as an example:

• on the VAZ-2112, as well as on the 2110, as well as 2111, the socket is located to the right of the driver’s seat, immediately under the column;
• on models 2108, 2109 and 21099, the socket you need is located under the glove compartment, on a special shelf;
• on cars with a europanel it can be found in the center of the console, near the cigarette lighter. A special decorative cover is used to disguise it;
• on Lada Kalina cars, the connector can be found near the gear shift lever. As is the case with cars with a Europanel, it is hidden under a special cover;
• on a Priora you need to look for it right behind the glove compartment, on the wall.

Thus, on the VAZ-2112 the diagnostic connector is located on the right side of the driver’s seat. It is located immediately under the steering column and, in principle, is not so difficult to find. Inspect the bottom of the panel.

Connector location and features

For communication with the controller there is a connector, which is a trapezoidal block with 9 blocks. To connect a scanning device, you need to know where the diagnostic connector is located. In a VAZ 2112 car it is located under the instrument panel console to the left of the steering column.

Location of the connector on the VAZ 2112

On the VAZ 2111, the connector is also located in the area of ​​the steering column on the right. Most often it has a vertical location.

Location of the connector on the VAZ 2111

Pinout

Knowledge of pinouts may be required if a car enthusiast wants to make an adapter for computer diagnostics with his own hands, or if you need to connect without one. Experts recommend buying ready-made devices without the need to make a plug yourself. However, if you do not have such an opportunity, and diagnostics need to be carried out urgently, we will consider two main pinout options used on VAZ cars of various years of manufacture. Until 2002, AvtoVAZ products used the following pinout option:

1. The 4th and 5th pins are GND outputs.
2. Pin 16 – +12 V (power line).
3. The 7th contact is the diagnostic line itself.

Since 2002, the pinout scheme has changed significantly. Now it looks like this:

1. Pin H – +12 V (power line).
2. Contact G – +12 V for the fuel pump.
3. Pin A – GND output.
4. Contact M – diagnostic line.

Which adapter to choose for VAZ

Before you buy a scanner for diagnostics, you need to find out which control unit is installed on your vehicle. Most models are equipped with control units with a K-line for data exchange. Therefore, the best choice is a VAGCOM diagnostic cable or an improved version of the K-Line diagnostic adapter. These adapters are suitable for diagnosing VAZ vehicles and ensure correct coordination of the vehicle's diagnostic system and computer. Please note that you will be able to perform full computer diagnostics, just like specialists at a service station.

How can you tell if your car is faulty?

There is a special lamp on the instrument panel with the inscription CHECK ENGINE. When you turn on the ignition, it lights up, and until you start the engine, a special program reads data from all systems and components of the car, thus transmitting data to the on-board computer to identify faults.

After you start the engine, the lamp should go out, but if it stays on for another 10 seconds, it means that some problems have been identified and error codes have been entered into the on-board computer programs. Communication with the controller is carried out using the diagnostic block.

CHECK ENGINE control signal on the instrument panel of a VAZ 2110

How to decipher error codes

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Most OBD error codes are unified, that is, a certain error code corresponds to the same decoding.

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The general structure of the error code is:

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In some cars, the error record has a specific form. It is safer to download error codes on the Internet. But doing this for all errors in most cases will be unnecessary. You can use special programs like AUTODATA 4.45 or similar. In addition to decoding, they indicate possible reasons, albeit succinctly and in English.

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It’s easier, more reliable and more informative to enter in a search engine, for example, “error P1504 Opel Verctra 1998 1.9 B”, that is, indicate in abbreviated form all the information about the car and the error code. The search result will be fragmentary information on various forums and other sites. You should not blindly follow all the recommendations at once. But, like the audience's opinions at a famous program, many of them will be plausible. In addition, you can get video and graphic information, sometimes extremely useful.

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Calculation of codes

Most often, diagnostic program codes are “deciphered” using a special device. However, on VAZs it is not so difficult to do it yourself.

ECU January 4 for VAZ 2110

The diagnosis itself goes like this:

• Connect contact “B”, which has the diagnostic block and “ground”;
• Turn the ignition key to the third position, do not start the car;
• First, the aforementioned “CHECK ENGINE” lamp flashes code 12 three times in a row. It, in fact, does not signal any malfunction, but simply shows that the diagnostic programs are working. On the VAZ 2110 this happens in this order: the lamp blinks briefly once (which should be considered the designation of number 1). After a pause of at least two seconds, it flashes twice in a row (two). So we got the number two. And this is repeated three times so that the driver can understand these signs;
• Now you need to be careful not to miss any faults. After the diagnostic program has declared its serviceability, it will begin to display error codes, if any. In the same way - flashes and pauses.

Difficulty connecting the adapter to the VAZ ECU

VAGCOM, K-Line adapters are designed for direct connection to the ECU via a 16-pin OBD-II connector. It began to be installed on VAZ cars after 2002. Some models are equipped with a 12 pin connector. It is not compatible with the adapter connector. The solution is simple: purchase a GM12 adapter or a K-Line adapter in an OBD1 (GM12) housing.

Installing a new adapter

Modern adapters elm 327 with the OBD-II program (puncture) are suitable for the VAZ 2110 . You can also install them yourself. First you need to purchase an elm 327 and a cable for it. You already know the location of the diagnostic connector. Be sure to study the instructions, which indicate the pinout of the block and the location of each connector.

Connection diagram for ELM327 to 12 PIN diagnostic block

The pad can be removed quite easily. Insert your own cable into each connector of the block, making sure that the pinout of the elm 327 complies with the manufacturer’s instructions. Check that each connector is connected correctly and each cable is in the correct place. After this, the block is installed in its place.

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.