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OBD History |
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To reduce the air pollution caused by traffic, the "California Air Resources Board" (CARB) introduced with OBD (On Board Diagnose) in 1988 tightened emission limits and a self-monitoring – On Board Diagnose – of the emission relevant components by electronic control units.
TO inform the driver about a malfunction in the OBD controlled emission control loop an error lamp for vehicles was instructed. (MIL - Malfunction Indicator Lamp).
Another tightening of the emission limits lead to OBD II in 1996. Referring to the American OBD II, Europe introduces OBD. Since 1996, OBD II is the legally binding prerequisite for readmission of vehicles in the USA. Because of this US regulation, diagnose systems were included into vehicles that were made for the European marked in the 1990s.
In Europe, directive 98/69EG dictates, that gasoline cars need to be equipped with OBD from 2000, diesel cars from 2003 and commercial vehicles from 2005. The standardized OBD2 interface is not only used by the manufactures for their own, extended diagnose functions but for those, that widely exceed the legal limits, too.
The next planned step is OBD3, where the vehicle should contact the authorities on its own, when emission based deterioration is found during the use of the vehicle. Then one will be requested by a demerit card to repair the malfunction. Therefore the emission checks, that were mandatory every two years, will be omitted.
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