please dont rip this site

Automobile IO

SAE standard J1850 is available for $63 from "This SAE Standard establishes the requirements for a Class B Data Communication Network Interface applicable to all on and off- road land based vehicles. "

ISO9141/2 is available for $28 at "This part of ISO 9141 describes a subset of ISO 9141:1989. It specifies the requirements for setting up the interchange of digital information between on-board emission-related Electronic Control Units (ECUs) of road vehicles and the SAE OBD II scan tool as specified in SAE J1978."

But as notes, there is significant divergence in the implementation of the physical layer used by auto mfgrs between SAE J1850 and ISO-9141 is the ODB-II home page "Dedicated to helping the home and independent technician understand and use OBD-II technology." Well... actually they sell a $250 PC-Auto interface. They do list the DTC codes (cached 20010220135132) however.

See also:


Vitaliy M. says: nothing beats having the actual standards (SAE J1850, J1979, ISO9141-2, etc.), but free information is also available: - info, schematics, pc2obdii interfaces
Elm Electronics - protocol converter chips for OBD-II
Implementing the J1850 protocol - by Intel - CAN in Automation (see CAN->Applications->Automotive) 



file: /Techref/io/cars.htm, 2KB, , updated: 2013/7/22 17:18, local time: 2024/7/23 03:47,

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