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2. OBD-II PIDs - Wikipedia

   en.wikipedia.org/wiki/OBD-II_PIDs

   OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool.. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.

3. On-board diagnostics - Wikipedia

   en.wikipedia.org/wiki/On-board_diagnostics

   The Society of Automotive Engineers (SAE) recommends a standardized diagnostic connector and set of diagnostic test signals. ~1994: Motivated by a desire for a state-wide emissions testing program, the CARB issues the OBD-II specification and mandates that it be adopted for all cars sold in California starting in model year 1996 (see CCR Title ...

4. Scan tool - Wikipedia

   en.wikipedia.org/wiki/Scan_tool

   DTC codes are read by a diagnostic tool, such as an OBD 2 scanner, which is plugged into the vehicle's diagnostic port. The tool communicates with the vehicle's onboard computer and retrieves the DTC codes. The codes are then interpreted by the mechanic or technician to determine the specific problem with the vehicle. [4]

5. Best OBD-II Scanners for 2024, Tested - AOL

   www.aol.com/best-obd-ii-scanners-2023-223000386.html

   Diagnostic OBD-II Scanners. For those who are a bit more serious about their auto repair, diagnostic OBD-II scanners provide more information on the car's inner workings, such as engine coolant ...

6. Data link connector - Wikipedia

   en.wikipedia.org/wiki/Data_link_connector

   The data link connector (DLC) is the multi-pin diagnostic connection port for automobiles, trucks, and motorcycles used to interface a scan tool with the control modules of a given vehicle and access on-board diagnostics and live data streams. [1] Prior to 1996, many OBD-I data link connector's were in the engine compartment, usually near the ...

7. ALDL - Wikipedia

   en.wikipedia.org/wiki/ALDL

   Most professional scan tools require a large database of vehicle definitions. [ 5 ] The signaling of ALDL is similar to the RS-232 serial data standard; differing in the voltages used to denote logical one (usually 0 V DC) and logical zero (either +5 V DC or +12 V DC), and that unlike RS-232, both transmit and receive functions are on the same ...