How to quickly find a Grant diagnostic connector and make an adapter for OBD2 for tens

The OBD port has been actively used in cars all over the world since the beginning of the 21st century.
The AvtoVAZ concern began installing an OBDII port in its models, starting with the Lada Kalina. By the way, before this period the tenth family had a 12-pin plug. Note: the Granta diagnostic connector does not require access devices, since it is quite possible to detect and use it blindly. For example, on a Lada Kalina, to connect, you should remove the plug next to the gearshift lever.

The purpose of the car diagnostic connector is to quickly exchange data with diagnostic devices. This makes it possible to both read and delete error codes and adjust some presets in RAM. In addition, it is possible to read the current value of the sensor identifiers specified on the Lada Granta. However, in order to be able to use these functions, you must first know where the diagnostic connector itself is located.

Search for OBD-2 on Lada Granta

Sitting on the front right seat, you need to find the glove compartment lid.
Place your hand underneath the lid and move it to the left towards the center console.
Your hand should now rest on the diagnostic connector.

As a visual reference, look at the vent cover located at the front passenger footwell. Above it is the plug we are interested in. By the way, it is not necessary to look at the port itself, since it will not be difficult to detect from the driver’s seat. The main thing is to know the place where you will be looking.

Where is the diagnostic connector for Lada Granta: photos and videos

This morning I looked at the engine temperature data through the OBD2 Torque program and did not find the diagnostic connector the first time. Before searching, I googled that the diagnostic connector is installed “on the front passenger side in the center console area.” I looked all over the center console and couldn't find any traces of the connector.

https://youtube.com/watch?v=95ognGQ4zIY

Location of the diagnostic connector in my Grant (photo)

Photo from under the glove compartment

Photo of the connector from the driver's door

Photo of the connector from a medium distance

Photo of the connector close up

In my Lada Granta, the diagnostic connector is located to the left of the glove compartment under the instrument panel. The reference point for the search is the passenger foot air nozzle. If you draw a parallel from the top point into the panel, you will see a diagnostic connector.

In my opinion, not a very good location. Let me explain why. If you want to use this connector to permanently connect the ELM327 (diagnostic adapter), then, depending on the model, it will stick out a little, so moisture from the passenger’s feet may get inside it. Also, strong passengers may accidentally try to tear it off or press it with their feet, which can cause damage.

A passenger may accidentally trip the diagnostic connector with their foot.

But, it seems to me, the designers of AvtoVAZ decided to save on wires and not lead the diagnostic connector block to a more convenient place. And they didn’t have a goal to make this connector for permanent connection. Although it is to this connector that on-board computers, such as Multitronics VC731, are connected.

How to use the diagnostic connector

Directly to destination. To diagnose a car using an adapter that is connected to a computer or phone, or to a special diagnostic device.
For the purpose of having fun.
Connect the adapter and install the Torque program on your phone, connect to it using a Bluetooth connection, and you can view the data online. And if you have a phone with GPS, then you can measure acceleration to 100 km/h, time to cover a section, etc. Diagnostic connector with connected adapter ELM327
View engine temperature. Since the first versions of the car did not have an engine temperature indication on the instrument panel, many owners used a diagnostic connector to connect on-board computers, which show many parameters, including engine temperature. And since most Grant owners complain about the low operating temperature of the engine, on-board computers are a very popular solution to this problem.

Using the connector

The main options for using OBD-2 in the Lada Granta include:

connecting a scanner to check the machine and deal with errors;
installation/connection of an on-board computer, for example, Multitronics or State.

Connecting an on-board computer to a Lada Granta car will have a useful effect, because in this way it will be possible to:

monitor the engine temperature;
receive error codes as soon as they occur;
forcefully start the cooling fan.

Why do you need a diagnostic connector?

Every time the vehicle undergoes a technical inspection, the data is updated. If any breakdown occurs, it is likely that it will be much easier to fix it by receiving data about the condition of the car during maintenance by connecting to the diagnostic connector.

Diagnostics of this type is not a panacea for a breakdown: with its help, the average car owner is unlikely to determine the exact cause of the malfunction. The fact is that information can be displayed with serious deviations. Therefore, only a professional is able to determine the cause of the malfunction, based only on the data received from the diagnostic connector. However, sometimes, if the problem is obvious, this information can help any car owner - too large a deviation of the parameters from the norm excludes the possibility that the problem is an error.

Thus, the data will help determine the cause of the breakdown.

Self-diagnosis Grants

To diagnose the Lada Grant, a standard K-Line adapter is not enough. It provides for the installation of an electrical control unit of a different configuration than on other VAZ vehicles, and it requires a special adapter. Today, the most popular is the use of the ELM-327 diagnostic adapter and various software for it, for example, ScanMaster, Torque.

It’s worth looking at what the ELM-327 adapter looks like in specialized literature or on the Internet.

Specialists on official servers use the dealer scanner DST-14T. It is unlikely that you will be able to perform diagnostics on Grant yourself, since this is not a simple procedure. It includes software and hardware components, and not just connection via K-Line. It is important to be able to compare the device readings with real circumstances.

Where is the diagnostic connector in Lada Granta?

The vehicle's diagnostic connector is designed for high-speed data exchange with diagnostic devices, which allows you to read and erase error codes, adjust some presets in RAM and read the current value of the parameters of sensors installed on the vehicle. Thus, in order to take advantage of these functions, you first need to know where the diagnostic connector is in the Grant.

The Granta diagnostic connector is located to the left of the glove box, above the side ventilation grille in the area of the passenger’s left foot. To gain access to it you will have to unscrew a couple of screws securing the plastic panel.

The Grant diagnostic connector is ODB-II type (16-pin trapezoidal), the connector diagram is shown in the photo:

4 — Body grounding
5 - Signal ground
6 - CAN-High line, J-2284
7 - K-line diagnostics (ISO 9141-2 and ISO/DIS 14230-4)
9 - SCS (Service Check System) - Output for reading slow self-diagnosis codes
12 — Output for programming
13 — Input/Output for VTM-4 and immobilizer control
14 - CAN-Low line, J-2284
15 - L-line diagnostics (ISO 9141-2 and ISO/DIS 14230-4)
16 - Power supply +12V from battery

Now, knowing the location of the Lada Granta diagnostic connector, you can connect an on-board computer or scanner.

Electric power steering

When the EPS diagnostic light comes on or the electric power steering switches on/off after a certain period of time, you first need to check the EPS using the diagnostic connector. Open Diag (application) together with an OBD-2 adapter or scanners will help here:

Scanmatic;
Motor Master;
ScanDoc.

The diagnostic process is designed to indicate where errors are located and decipher them for further repair based on the type of malfunction. In addition, it is quite possible to perform the check without a scanner:

There is an 8-pin connector (black) under the ignition switch under the steering wheel. It is necessary to dismantle the casing at the steering column (unscrew the fastening screws from below).
Insert the paper clip, closing the two contacts.
Turn on the ignition and observe the warning lamp.
The first signal will be the continuous burning of the lamp (“1”).
It is necessary to count subsequent short signals, that is, if there are 3 short ones, then “3”.
In our case, the code “13” should be formed.

Diagnostics 2110

The tenth generation VAZ received a 12-pin diagnostic block. These began to be installed on cars as Euro-3 and higher standards were introduced.

Why is OBD2 not suitable for 10?

Frets of the tenth family received their own connection option for diagnostics. You cannot connect a standard international plug to it - intervention will be required.

The reason is that tens have a 12-pin connector. OBD2 has 16 pins.

Adapter for ELM327 and OBD2

News - you can assemble an adapter for tens. Need to:

Connection diagram;
4 wires;
New OBD2 format plug (if you don’t want to connect the wires directly to the scanner every time).

You cannot connect an OBD2 scanner directly to connector 2110 - you need either an adapter or a direct connection of several contacts according to the diagram below.

The adapter circuit for tens requires working with four contacts. No need to go into all 12.

Advantages of an auto scanner

“Scanmatik-2” was appreciated even by professional diagnosticians. Having tried this kit once, car enthusiasts were pleasantly surprised that for a relatively low price it allows you to work with a full fleet of domestic cars and an impressive part of foreign ones. When working with the diagnostic kit of this model, you can also use a wireless interface to connect the system to a computer (Bluetooth).

The OBD-2 connector on Grant regularly supplies power to the diagnostic adapter. In extreme cases, the Scanmatik-2 adapter can be powered from the cigarette lighter. In general, the device is very convenient for performing diagnostic procedures yourself. It even has surge protection. If, for example, you apply current from the cigarette lighter when the system does not need it, nothing bad will happen.

Every device has pros and cons. Many car thieves know how to use the diagnostic connector for their own selfish purposes. As a rule, the diagnostic block is used by criminals to disable the standard immobilizer. A common solution to this problem is to replace the standard block with a “re-pinned” one, with a different arrangement of contacts.

The adapter consists of a “male” (fake connector) and a “female” (standard connector), which is previously removed. It will not be possible to connect standard diagnostic equipment to the new connector without such an adapter, but the chances of saving the car from theft are increased. That's all. Good luck!

This morning I looked at the engine temperature data through the OBD2 Torque program and did not find the diagnostic connector the first time. Before searching, I googled that the diagnostic connector is installed “on the front passenger side in the area of the center console.” I looked all over the center console and couldn't find any traces of the connector.

Engine control unit Lada Granta

As mentioned at the beginning of the article, Granta received new “brains” with CAN support (M74CAN). This innovation is capable of integrating “brains” with alarms and radios with a CAN bus.

They often install a “Standard” controller with Itelma number 11186-1411020-22: This ECU is not compatible with earlier VAZ models. In early VAZs, for example, Priora, the ECU came with a K-channel for data transmission.

Location of the ECU for Granta:

The “brains” are located at the bottom of the front panel, or rather under the glove compartment. It will be better visible if viewed from the passenger seat. The ECU is hidden by sound insulation and upholstery, so it will not be easy to get it out.

ECU firmware:

Serial firmware should indicate an optimized dynamic version for the 1.6-liter 8-valve Granta with an “M74” controller and an exhaust gas emission standard of “EURO-2”.

ECU chip tuning allows you to physically disable the second oxygen sensor (“lambda probe”) along with the catalyst. If this version of the firmware is implemented, this will lead to a significant increase in the dynamic capabilities of Granta.

To find out what firmware the control unit has, use the OpenDiag application, together with a diagnostic adapter connected to the OBD2 connector.

Methods for diagnosing ECUs and errors on Lada Granta via OBD2

Self-diagnosis

On Grant, the ECM with the M74 controller has built-in self-diagnosis that detects malfunctions. The ECM detects the problem, then the “Check Engine” light comes on and the error identification begins. Then the code is saved in memory and shown on the dashboard.

Did the Check Engine light come on on Grant?

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