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  • 1988: SAE set a standard connector plug and set of diagnostic test signals. The EPA ( Environmental Protection Agency) adapted most of their standards from the SAE on-board diagnostic programs and recommendations.
  • 1996: OBD-II (an expanded set of standards and practices developed by SAE) was adopted by the EPA and CARB (California Air Resources Board) for implementation.

Standards

OBD-II is a set of specifications and services based on the ISO 15031. OBD-II consists of so many different standards, protocols and bus systems used to communicate that it's difficult to list all of them.

  • ISO 15031: protocol for communication between a vehicle (through the OBD port/connector) and an external diagnostic equipment for emissions related diagnostics.
  • SAE J1939-13: round diagnostic connector may support OBD-II data on heavy duty vehicles for sales in the USA after 2010.
    Here are some of the common part numbers in the HD10 series now by TE Connectivity (formerly:
    • HD10-9-1939P: receptacle flange
    • HD14-9-1939P: receptacle inline
    • HD16-9-1939S: plug
    • HD17...: (question) no bayonet ring (question)
  • SAE J1962: hardware interface (connector, female = receptacle, 16-pin (2x8), D-shaped)
    • type A: 12 V vehicles (full middle groove)
    • type B: 24 V vehicles (interrupted middle groove)
    • common with passenger cars (11 bit headers)
    • used by some heavy duty trucks in North America (29 bit CAN identifiers)
  • SAE J1979: defines many OBD-II PID's.

Glossary

  • DLC = data link connector = OBD-II port
  • DTC = diagnostic trouble codes

Teltonika OBD-II devices

As of 2019-03, no Teltonika OBD-II device is able to read out DTC's (diagnostic trouble codes).


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