The OBD standard (On Board Diagnostic) was implemented initially by the CARB (Californian Air Resources Board) to control polluting emissions from vehicles. The arrival of electronic computers to manage the engine and associated computers enabled vehicles to reduce their pollutants. The OBD states that a vehicle should permanently monitor the smooth operation of the engine throughout its life.
There are several OBD standards:
EOBD was implemented in Europe at the same time as the EURO3 standard for pollutants from vehicles. It states that emission failures must be signalled by means of an indicator on the dashboard and that the codes corresponding to the detected failures must be recorded by the vehicle.
As a result, since EURO3 and the European directive 98/69/EC, the standard is applicable depending on the vehicles from the following dates:
Some vehicles not covered by the directive may nevertheless be compatible. It depends on how much manufacturers are in advance of the new directive and their willingness to implement the standard.
PS: It should be noted that commercial and company vehicles are also affected by this directive, but their application dates are different (2006/2007).
Euro 3 and its directive announced the arrival of a new indicator on vehicle dashboards. The MIL for "Malfunction Indicator Lamp" is an icon representing an engine unit in orange/yellow (red is prohibited) specified by ISO 2575. Opposite are some examples on various vehicle models.
This indicator is used to signal a problem in the vehicle's pollution control system. Depending on the faults, there are several possible modes of operation:
The directive states that the connector must be placed inside the passenger compartment. Usually it is located under the steering wheel in the fuse box or under the ashtray near the handbrake.
If you cannot find your diagnostic connector, go to our page location of OBD connectors to help you locate it.
PS: It should be noted that the remaining pins may be used by the manufacturer as needed.
|2||J1850 BUS+ (SAE)|
|7||K line (ISO)|
|10||J1850 BUS- (SAE)|
|15||L line (ISO)|