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OBD - On Board Diagnostic


What is OBD-II? 
OBD-II stands for On-Board Diagnostics, II generation. It is a set of documents issued by SAE and ISO, which describe the interchange of digital information between on-board emission-related Electronic Control Units (ECUs) of road vehicles and an OBD-II scan tool. OBD-II also commonly refers to the physical on-board diagnostic system of a vehicle, which consists of an ECU (or multiple ECUs), Malfunction Indicator Light (MIL), Diagnostic Link Connector (DLC), and the wiring that connect the different elements.

Why do we need OBD-II? 
Mainly, you now have a powerful tool to analyze your cars On Board Diagnostic (OBD) data yourself, better even than the specialized scanning tools only dealerships and big automotive repair shops had in the distant past. This will save you money in repair costs by knowing what is or isn't wrong with your car in many cases, and avoid costly trips to the dealership or repair shop.

It resets the check engine lights, reads and clears all generic ,and some manufacture specific ,DTC,displays the I/M readiness status ,views OBD II freeze frame data, displays pending codes, retrieves vehicle information (VIN), and determines the status of the malfunction indicator (MIL) lamp. 

How do we know whether my car is OBD-II compliant? 
Our OBD2 scan tool will work on 1996 or newer OBD 2 / EODB / JODB compliant cars and trucks, and is based on the ELM327 chip which auto-detects all OBDII protocols: CAN, ISO, VPW, PWM, and KWP2000

There are several ways.
1. 1996 or newer model year vehicle sold in the United States

United States legislation requires all cars and light trucks model year (MY) 1996 and newer to be OBD-II compliant. More information is available on the EPA's website.
2001 or newer model year gasoline vehicle sold in the European Union

Note that here "European Union" means countries which were members of the EU in 2000.

2. 2004 or newer model year diesel vehicle sold in the European Union

Note that here "European Union" means countries which were members of the EU in 2003.

3. Other vehicles

If your vehicle does not fall into any of the above categories, look under the hood and try to locate a label that explicitly states that the vehicle was designed to comply with OBD-II legislation.

In this case, OBD-II is used as a general term and can mean any of the following:
OBD II (California ARB)
EOBD (European OBD)
JOBD (Japanese OBD)

You may also consult your vehicle's owner's manual and perhaps contact your local dealer. However, be aware of the fact that many dealers do not know the difference between OBD and OBD-II.

If the vehicle is not OBD-II compliant, you cannot use a generic OBD-II scan tool to obtain diagnostic information from your vehicle.

Vehicle Coverage

European Vehicles
If your petrol passenger vehicle was manufactured for sale in Europe, with the model year of 2001 or newer (and in some cases 2000), you have the EOBD / OBDII interface. EOBD diesel vehicles start with the 2004 model years. Some Asian models such as Subaru were OBD-II before 2000.


US Vehicles
Generally these went OBD-II from around 1996. For example:
GM/Vauxhall/Opel/Holden '96 - Now (OBD-II)
Ford '96 - Now (OBD-II)
Chrysler '96 - Now (OBD-II)
Toyota '96 - Now (OBD-II)
Honda '96 - Now (OBD-II)
NISSAN '96 - Now (OBD-II)
SUBARU Impreza


All other Asian and European '96 - Now (OBD-II) i.e. Porsche, Opel, BMW, Mercedes, Volvo, Renault, Peugeot, Citroen, Daewoo, Alfa Romeo, Hyudai, Daihatsu, Lancia, Mazda, Mitsubishi, Kia, Saab, Subaru, Smart etc 








Page Last Edited - 04/03/2022


    Copyright 2003   All rights reserved.   Revised: 04/03/22.                                             Web Author, David Biggs
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