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What is obd diagnostic scanner?

Views:0     Author:Site Editor     Publish Time: 2021-03-16      Origin:Site

OBD diagnostic scanner is an inspection tool used with OBD system on vehicle. OBD is the abbreviation of On-Board Diagnostics System. This system will monitor whether the car's exhaust exceeds the limit from the engine's operating condition at any time, and will immediately issue a warning if it exceeds the limit. When the system fails, the fault (MIL) light or the Check Engine (Check Engine) warning light is on, and the power train control module (PCM) stores the fault information in the memory, and the fault code can be read from the PCM through a certain program . According to the prompt of the fault code, the maintenance personnel can quickly and accurately determine the nature and location of the fault.


Here is the content list:

What is the working principle of OBD diagnostic scanner?

What are the specific classification and main differences of OBD diagnostic scanner?

Who are the OBD1 diagnostic scanner and obd2 diagnostic scanners suitable for?


What is the working principle of OBD diagnostic scanner?

The obd diagnostic scanner device monitors multiple systems and components, including engines, catalytic converters, particulate traps, oxygen sensors, emission control systems, fuel systems, EGR, etc.


The obd diagnostic system is connected to an electronic control unit (ECU) through various emission-related component information. The ECU has the function of detecting and analyzing emission-related failures. When an emission failure occurs, the ECU records the failure information and related codes, and warns the driver through the failure lamp. ECU guarantees the access and processing of fault information through standard data interface. OBD diagnostic scanner is able to access to the ECU via the data interface and obtain the fault information.

 OBD diagnostic scanner

What are the specific classification and main differences of OBD diagnostic scanner?

OBD diagnostic scanner is a device that enables you to read and diagnose the error code displayed by the car. Without them, you would not know what went wrong with the car. In fact, mechanics also use these obd diagnostic scanners to diagnose car problems. There are two main types of OBD diagnostic scanners on the market: obd1 diagnostic scanners and obd2 diagnostic scanners. But, what is the main difference between obd1 diagnostic scanners and obd2 diagnostic scanners?

OBD diagnostic scanner is an on-board diagnostic program, a process of scanning a vehicle with an on-board computer. In the early stage, the obd diagnostic scanners system was developed mainly to turn on the malfunction lights of the car. Later, more standardized vehicle information was developed in obd diagnostic scanners and obd2 diagnostic scanner.


Similarly, OBD2 is an advanced technology improved from OBD. Therefore, OBD2 provides better and more standardized vehicle protocol and system inspection data. OBD needs a wired connection, while OBD2 can be connected freely via Bluetooth or wifi. Last but not least, because OBD2 has wider compatibility, it is more versatile and reliable than OBD.


Who are the OBD1 diagnostic scanner and OBD2 diagnostic scanner suitable for?

It is specially designed for obd1 diagnostic scanners.

①Obd1 diagnostic scanners is a person who owns an old car that does not support OBD2 diagnostic scanner. Cars produced before 1996 are compatible with OBD1. They are easy to use, but do not work wirelessly and have limited functions. Such car owners may also choose OBD1 + OBD2 scanners that support old and new models and provide a mixture of OBD1 and OBD2 functions.

②Obd1 diagnostic scanners does not provide advanced features, so it can help solve some minor problems. However, the fixes are not always reliable and usually only highlight issues with ECM, ABS and Transmission. Some of these devices have built-in memory to store codes, but these codes may be difficult to read.


Specially designed for obd2 diagnostic scanner.

①People who own vehicles produced in 1996 and later can purchase OBD2 scanners. If you want to be an expert in solving automotive problems, then we recommend that you use an obd2 diagnostic scanner that can provide both basic functions and advanced functions. Some advanced scanners are even suitable for mechanics.

②However, if you don't know much about cars, then a basic obd2 diagnostic scanner will help you. If you lack car knowledge, advanced features will never bring you any benefit. The obd2 diagnostic scanner is easy to use and can work wirelessly, but some wired options are also available. Most support multiple applications and provide easy-to-read data through reliable fixes.

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