Actron CP9135 OBD II AutoScanner - Manual (Page 11)

Tool Basics
2-3
2.3 Diagnostic Link Connector and Location
The AutoScanner communicates with
the vehicle’s computer modules via a
Diagnostic Link Connector (DLC).
OBD II regulations define the physical
and electrical specification for the DLC.
Certain pins in the connector are dedicated for power
and ground. The DLC is also referred to as a J1962 connector. The term
J1962 is taken from a physical and electrical specification number
assigned by SAE (Society of Automotive Engineers). The standard
ensures that all vehicles with OBD II systems use the same connector.
The J1962 specification
defines the location of the
DLC in the vehicle. The DLC
should be located under the
dashboard on the driver side
of the vehicle. 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 the
DLC should have been
located.
2.4 Diagnostic Trouble Codes (DTCs)
Diagnostic Trouble Codes (DTCs) consist of a three-digit code preceded
by an alphanumeric designator. When the on-board computer recognizes
and identifies a problem, a DTC for that fault is stored in memory. These
codes are intended to help the user determine the root cause of a problem.
The format and type of DTCs is summarized on the next page.
J2012 is a standard for all DTCs established by the Society of Automotive
Engineers (SAE). Codes and the definitions assigned by this specification
are known as Generic (or Global) OBD II codes. OBD II requires
compliance of this standard, and has made it a standard for all cars, light
trucks, APVs, MPVs, and SUVs sold in the U.S. from Model Year 1996
and newer. Codes not reserved by the SAE are reserved for the
manufacturer and referred as Manufacturer Specific.
Periodically, new DTCs are developed and approved by the SAE. Upon
approval of the new codes, the AutoScanner’s software will be updated.
There is no established time period that updates are made to the database.