NT200 OBDII/EOBD Code Reader User’s Guide_English Version_V1.10
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introduced in early 1980's to control engine functions and
diagnose engine problems by vehicle manufacturers. As the
OBDI lacked standardization of protocols and interface, it
allowed different interpretations among vehicle manufacturers.
OBDII, the second generation On-Board Diagnostics, improved
in both capability and standardization, is a system developed in
mid 1990’s by the Society Automotive Engineers (SAE) to
standardize automotive electronic diagnosis. EOBD is European
version of OBDII required in Europe since 2001.
The OBDII standard specifies:
● A generic diagnostic port (Data Link Connector) and
its pinout;
● The protocols and the messaging format;
● A standard list of vehicle parameters identifications;
● A standard list of diagnostic trouble codes (DTCs);
Data Link Connector
The Data Link Connector (DLC) is a standard 16-pin interface
located under the dashboard on the driver's side of the
passenger compartment. If the DLC is not located under the
dashboard as stated, a decal describing its location should be
attached to the dashboard in the area where the DLC should
have been located.
NOTE On some Asian and European vehicles the DLC is
located behind the “ashtray”, which must be removed to
access it, or on the far left corner of the dash. If the DLC
cannot be found, consult the vehicle’s service manual for
the location.
