- 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 by Deutsch Connectors):- HD10-9-1939P: receptacle flange
- HD14-9-1939P: receptacle inline
- HD16-9-1939S: plug
- HD17...:
no bayonet ring
- 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.
Data bases
- PID = parameter IDentifier by WikiPedia
- List of OBD-II compatible vehicles by Outils OBD Facile;
you can check which parameters can be transmitted from your car to an OBD-II device.
Glossary
- DLC = data link connector = OBD-II port
- DTC = diagnostic trouble codes
OBD-II to FMB
Selected Teltonika FMB devices can be connected to an OBD-II port trhough a direct wireless connection.
Add Comment