pinout obd2 connector- all cars produced in last years, equipped with all kinds of electronic devices. One of important devices is considered a system for performing diagnostics of equipment installed in a vehicle. The design of this device includes an OBD2 connector that was designed in the nineties. Its main purpose is the ability to connect a scanner. In addition, it can be used to measure the onboard voltage, temperature component, speed, and other parameters. Moreover, all this can be done directly during the operation of vehicles.
As a rule, the obd2 connector socket is installed in the car near the steering column, (the distance is approximately 180 mm). The parametric characteristics of the connector allow you to create an exchange of information data using an industrial digital CAN bus. It is with the help of the CAN protocol that you can connect various control devices, all kinds of sensors and mechanisms. Moreover, it is possible to simultaneously receive and transmit data in digital format With high speed, also have anti-jamming function.
Connector design
functionality and pinout obd2 connector made according to a two-component circuit without symmetry and will include sixteen knife-shaped contacts. These contacts are located in the block parallel to each other with a guide key. Their numbering in the block is from left to right, with the top line of contacts marked with numbers from 1-8, and the other row from 9-16. The design of the connector is made of durable plastic, and the contacts themselves are separated by a special longitudinal plate.
To implement the correct polarity when connecting the "dad" connector to the "mother" socket, a trapezoid design with slightly rounded corners is provided. The pin functions in the connector have two assignment groups. One of which is made according to the standard scheme, and the manufacturer has the right to use the other group at his own discretion, to perform certain tasks.
Unsoldering obd2 connector with the definition of the function of each contact is shown in the table below:
| 1 | Branded |
| 2 | Bus J1850 |
| 3 | Branded |
| 4 | Grounding general |
| 5 | signal ground |
| 6 | CAN bus |
| 7 | Line K according to ISO 9141-2 |
| 8 | Branded |
| 9 | Branded |
| 10 | Bus J1850 |
| 11 | Branded |
| 12 | Branded |
| 13 | Branded |
| 14 | CAN bus |
| 15 | Line L according to ISO 9141-2 |
| 16 | +12V |
A distinctive feature in the design of the obd2 connector is that it has a connection socket onboard network. And this makes it possible to use scanners without resorting to the use of an additional power supply circuit. A lot has changed since the first obd2 connectors, which were only able to display information about an existing problem. Today, advanced connectors have the ability to extract maximum information about problems. This happens due to the connection of diagnostic devices with electronic modules in auto.
How to make your own connecting cable
Sometimes there is a need to make connecting wire, this may happen when you need to connect to car computer diagnostic device. Therefore, as well as possible, the values indicated in the table will help here.
OBD2 scanner for SsandYong New Actyon
Since 1996, it has become necessary to check all cars produced for compliance with OBD standards. This was due to the requirement to control the environmental situation. Short description devices for control, location, functions further in our article.
Brief description of the control device
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The pinout designation OBD - 2 is used to check compliance with the standard during the diagnosis and control of the operation of car engines and units installed on the chassis. The device is made in the form of a diagnostic connector for connecting devices that monitor exhaust gases and work of the whole car without interruption. The OBD-2 pinout is a set of requirements that all car manufacturers must comply with.
It is required that the connector be located in the passenger compartment at a distance of at least 18 cm from the steering column. The system is universal for all cars, it has a standard CAN digital protocol that allows you to take data at any time. You can make a detailed identification of various problems in the machine.
When diagnosing imported cars, additional lines K - Line and L - Line are used, as well as digital methods for transmitting indicators - CAN.
The control function is supported by sixteen contacts:
- contact number one - it is installed at the factory - the manufacturer;
- the second refers to the J 1850 tire;
- number three is also put by the automaker;
- the fourth - to control the grounding contacts of the auto - chassis;
- number five controls the signal line ground network;
- contact number six is responsible for the CAN digital bus;
- number seven - ISO 9141 - 2, K - Line;
- eight and nine installed by the automaker;
- the tenth controls the CANJ 1850 bus;
- numbers eleven, twelve and thirteen are also installed at the car factory;
- pin number fourteen controls the CANJ 2284 bus;
- fifteen - ISO 9141-2, L - Line;
- the sixteenth controls the battery voltage.
OBD adapters - 2 connectors for diagnostics
Cars of all brands in without fail must be equipped with diagnostic OBD adapter– 2. It is used when diagnosing a car independently or in service centers. The adapter is suitable for:
- diagnosing all units of the car;
- analysis of errors and mileage status;
- monitoring the operation of the engine;
- for tension;
- temperature;
- speed;
- condition of panel devices;
- you can track the average and current fuel consumption;
- the degree of heating of the motor;
- control the trips.
You can connect laptops, computers, phones to the adapter. It is suitable for connecting to the OBD - 2 system and all programs that are covered by their OBD 2 pinout requirements. The connection is made with a USB cable, bluetooth or WI-FI. With the help of an adapter, cars of various imported and domestic manufacturers can be tested.
Connector functions provided by OBD-2 pinout
The main function of the OBD - 2 connector is to provide communication between the scanning device and the control units. The pinout provides for vehicle power and ground connections for successful operation. automotive scanner, without connecting a special power supply unit. When choosing a scanner, you should learn about its capabilities. The higher its price, the more accurate the verification will be. If it is not possible to purchase an expensive device, you need to choose a scanner made specifically for this brand car.
Pinout allows the driver to match his car with the block OBD diagnostics – 2.
If a discrepancy is found with certain requirements of the composition exhaust gases the CheckEngine signal appears, calling to check the operation of the engine, and the light signal turns on. This is an indicator warning about the amount of harmful gases exceeding the norm.
With the help of the obd 2 system, pinout control is carried out important parameters, the main of which is clean air. The presence of the connector makes it possible to monitor the degree of serviceability of the car without qualified expensive assistance.
The pinout of the OBD 2 connector will allow the car owner to correctly connect the contacts of the diagnostic block vehicle. A scanner or a personal computer (PC) is connected to this plug to check the car.
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Description and features of OBD 2
The system for diagnosing a car OBD 2 according to the standard includes the structure of the X1234 code.
Each symbol here has its own meaning:
- X - the element is the only letter and allows you to find out the type of car malfunction. May not work correctly power unit, transmission, sensors, controllers, electronic modules, etc.
- 1 - general OBD class code. Depending on the car, it is sometimes additional code manufacturer.
- 2 - using the symbol, the car owner will be able to clarify the location of the problem. For example, it can be an ignition system, battery power ( battery), additional power lines, etc.
- 3 and 4 - determine the sequence number of the fault.
The main feature of the block is the presence of a power outlet from the car's electrical network, which allows the use of scanners that do not have built-in power lines. Initially, diagnostic protocols were used to obtain data on the occurrence of problems in the systems. pads in modern cars allow consumers to receive more information about mistakes. This is ensured by the connection of diagnostic scanners and devices with electronic modules in the car.
Depending on the manufacturer of the adapter, the device may belong, for example, to the following international classes:
- SAE J1850;
- SAE J1962;
- ISO 9141-2.
The Mir Matizov channel spoke in detail about the purpose of diagnostic pads and their use.
Where is OBD 2 located?
The location of the OBD 2 block is always indicated in service manual, so this point is better to clarify in the documentation.
The different position of the diagnostic plug in the car is due to the fact that vehicle manufacturers do not use a single standard regarding the installation of pads. If the device is classified J1962, then it must be installed within a radius of 18 cm from the steering column. Manufacturers do not actually follow this rule.
The location of the device can be as follows:
- In a special slot in the lower casing instrument cluster. It can be seen in the center console in the driver's left knee area.
- Under the ashtray, which is usually located in the center of the console and instrument cluster. This is where the connector is often installed. French manufacturers cars - Peugeot, Citroen, Renault.
- Under the plastic plugs located on the bottom of the instrument cluster. In this place, the pads are usually installed by the VAG manufacturer - Audi cars, Volkswagen, etc.
- On the back of the center console, in the area of \u200b\u200binstallation of the "glove box" housing. This location is typical for some VAZ cars.
- In the handle area hand brake, under the plastic of the center console. This situation is typical for Opel cars.
- At the bottom of the armrest niche.
- IN engine compartment, next to the engine shield. In this place, the connector is installed by Korean and Japanese manufacturers.
If the car has a solid mileage, then the installation location may be different. Sometimes when electrical faults or damage to the circuits, car owners transfer the connector.
User Ivan Matieshin, using the example of a Lada Granta car, showed where the OBD 2 diagnostic output is installed.
Types of connectors
In modern vehicles, two types of diagnostic pads can be used - classes A or B. Both connectors are equipped with 16-pin outputs, eight pins in each row. The contact elements are numbered from left to right, respectively, at the top are components numbered 1–8, and at the bottom - 9–16. Outer body diagnostic block made in the form of a trapezoid and is characterized by rounded shapes, which makes possible connection adapter.
The main difference between different types connectors is in the guide grooves located in the center.
Photo gallery
Photos of potential locations diagnostic connectors:
The location of the connector in the "glove compartment" of the car Diagnostic output under the center console of the car The location of the block under the ashtray in the cabin
OBD 2 Pinout
Scheme of connecting contact elements to the diagnostic block:
- Backup contact. Depending on the manufacturer, any signal can be output to it. It is assigned by the auto developer.
- Pin K. Used to send various parameters to the control unit. In many cars, it is designated as a J1850 tire.
- Reserve contact, which is assigned by the vehicle manufacturer.
- "Mass" of the diagnostic block connected to the vehicle body.
- "Ground" signal of the diagnostic adapter.
- Contact element to secure direct connection digital CAN interface J2284.
- Contact for connecting channel K in accordance with the international standard ISO 9141-2.
- Reserve contact element assigned by the vehicle manufacturer.
- spare contact.
- Pin required to connect to a J1850 class bus.
- The purpose of this contact is determined by the machine manufacturer.
- Assigned by the auto developer.
- Reserve pin assigned by the manufacturer.
- Additional contact element for connecting the digital CAN interface J2284.
- Pin for channel L, intended for connection in accordance with the ISO 9141-2 standard.
- Positive contact for connecting the voltage of the car's electrical network, designed for 12 volts.
As an example of the factory pinout of the block, you can use the Hyundai Sonata car. In these models, the first pin of the connector is designed to receive signals from the control module anti-lock braking system. Pin number 13 is used to read pulses from the ECU ( electronic block controls), as well as airbag controllers.
Pinout types can be different depending on the protocol class:
- If the car uses the ISO9141-2 standard, then this protocol is activated by using pin 7. Pins under the second and tenth numbers are not used and are inactive. Used to send information contact elements 4, 5, 7 and 16. Depending on the car, pin 15 can be used for this task.
- If the vehicle implements the SAE J1850 type VPW protocol, then the second, fourth, fifth and sixteenth pins are used in the connector. Such pads are usually equipped with vehicles from General Motors European and American production.
- It is possible to use the J1850 protocol in PWM mode. This application provides for the additional involvement of the tenth pin. This type of connector is installed on Ford cars. Regardless of the type of output, the seventh pin is not used.
Channel "MotorState" spoke in detail about OBD pinout 2 diagnostic connectors for cars.
Diagnostics via OBD 2
The verification procedure is as follows:
- Depending on the vehicle, the diagnostic process can be carried out with the ignition off or on. This moment should be checked in the service manual. Before starting the ignition procedure in the machine is turned off or on.
- The program is launched on the computer for verification.
- Diagnostic equipment is being connected to the connector. If this is a scanner, then the block with the wire from it must be inserted into the plug. When using a PC, one end of the adapter is inserted into the USB output of the computer, and the other end is connected to the connector.
- You need to wait until the program determines the block after synchronization. If this does not happen, you should go manually to the control menu and select the option to search for new devices.
- The diagnostic procedure starts on the computer. Depending on the software, the user can choose the right tool checks. Some programs support separate diagnostics of the engine, transmission unit, electrical network and other components.
- After the verification procedure is completed, fault codes will appear on the PC screen. These errors must be deciphered in order to accurately determine the type of breakdown. In accordance with the received data, the vehicle is being repaired.
Video "How to diagnose a car through OBD 2?"
The SUPER ALI channel showed the process of testing vehicle systems using a special scanner connected to the OBD 2 connector.
Currently great attention given control over cleanliness environment. In this regard, OBD technology appeared, designed to do independent. The article gives the concept, the history of creation, the OBD2 pinout is considered, the OBDII diagram is attached.
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Overview of OBD2
On most modern cars installed (ECU), which collects and analyzes data on the work various systems car.
Concept and features
The term OBD - diagnostics of onboard equipment (On Board Diagnostic) is a general term that refers to the self-diagnosis of a car. This technology allows you to get information about the status of various systems. passenger car from the onboard computer.
At first, OBD only gave a malfunction message, but no detailed information about its essence was given. IN latest versions The system uses a standard digital connector that allows you to receive information about the status of auto systems in real time with the receipt of fault codes by which you can identify them. This a good device for reading errors and removing them.
An excursion into the history of creation
The history of the creation of OBD goes back to the 50s of the last century. The US government drew attention to the fact that the development of the automotive industry worsens the environment. The specification was developed by the Society of Automotive Engineers (SAE). At first, the OBDII diagnostic system only monitored the exhaust gas recirculation system, fuel supply, oxygen sensor, engine control unit related to exhaust gas control. There was no unified control system; each manufacturer installed its own system.
Since 1996, the United States has developed the second concept of the OBD2 standard, which has become mandatory for newly produced cars.
Purpose of OBD2-identify:
- type of diagnostic connector;
- pinout;
- electrical communication protocols;
- message format.
The European Union has adopted EOBD, which is based on OBD-II. It has been mandatory for all cars since January 2001. OBD-2 supports 5 communication protocols.
Pinout Features
The device for working with OBD is a diagnostic connector to which devices are connected that control the composition of exhaust gases and the operation of the main vehicle systems. The OBD2 pinout is a list of requirements that car manufacturers must adhere to.
According to the requirements, the OBD diagnostic connector must be located at a distance of no more than 18 cm from the steering wheel. The system is universal, uses the standard CAN digital protocol. It makes it possible to get detailed information about vehicle problems.
OBD2 protocols provide the ability to read various parameters, the number of which depends on the control unit and may differ by various manufacturers(Black Mamba).
Basically, about 20 parameters are supported.
By using OBD II systems can be read:
- coolant temperature;
- in what mode does the fuel system work;
- correction of fuel supply by bank 1/2, both long-term and short-term;
- estimated load on the engine;
- engine speed;
- fuel pressure;
- ignition timing;
- vehicle speed;
- air flow;
- pressure in the intake manifold;
- throttle position;
- location of oxygen sensors and data from them;
- incoming air temperature, etc.
To control a certain auto system, 2-3 parameters are enough. But more may be required. The number of simultaneously controlled parameters and the data output format depend on the scanning device, as well as on the speed of information exchange with the ECU.
The diagnostic connector has 16 pins - their pinout is as follows:
1 - installed at the factory;
2 - connected to the bus J 1850 (J1850 Bus +);
3- set by the manufacturer;
4- controls the ground contacts of the car (chassis) (Chassis Ground);
5 - to control the grounding network of the signal line (Signal Ground);
6 - associated with digital bus CAN (CAN High (J-2284));
7 - ISO 9141 - 2, K - Line;
8.9 - sets by the automaker;
10 - to control the CANJ 1850 bus (J1850 Bus-);
11, 12, 13 - installed by the manufacturer;
14 - to control the CANJ 2284 bus (CAN Low (J-2284));
15 - ISO 9141-2, L - Line;
16 - to control the battery voltage (Battery Power).
Thanks to the pinout, the driver can combine his car with the OBD2 diagnostic block.
If it is found that the composition of the exhaust gases does not meet the requirements, the CheckEngine message will light up, requiring the operation of the engine to be checked. The indicator warns that the amount has been exceeded harmful substances in waste gases.
OBD2 adapter
Each vehicle must be equipped with an OBD2 diagnostic adapter.
It is convenient to use for:
- diagnostics of car systems;
- identification and analysis of errors;
- control of the operation of the power unit;
- voltage, speed, mileage, temperature control;
- to track fuel consumption;
- control of a condition of panel devices;
- mileage tracking, etc.
When choosing a scanner, you should be guided by its capabilities. More accurate diagnostics are given expensive devices. If it is impossible to buy an expensive scanner, you should choose a scanning device made for this brand of car.
The OBD2 connector is used to connect the scanner to the ECU. Using the pinout, the scanner is connected to the car's power supply and ground, which ensures it smooth operation. Thanks to the OBDII protocols, the parameters that affect the purity of the air are controlled. This is environmental protection.
The presence of the OBD2 connector allows you to control the health of the car on your own, without resorting to expensive diagnostics.
