please dont rip this site

Automobile IO

SAE standard J1850 is available for $63 from http://www.sae.org/technical/standards/J1850_200606 "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 http://www.sae.org/products/standards/ISO9141_2.htm "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 http://www.northstarlabs.com/rp6.htm notes, there is significant divergence in the implementation of the physical layer used by auto mfgrs between SAE J1850 and ISO-9141

http://www.obd-ii.com/ 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:

Code:

Vitaliy M. says: nothing beats having the actual standards (SAE J1850, J1979, ISO9141-2, etc.), but free information is also available:

ScanTool.net - info, schematics, pc2obdii interfaces
Elm Electronics - protocol converter chips for OBD-II
Implementing the J1850 protocol - by Intel
http://www.can-cia.de/ - CAN in Automation (see CAN->Applications->Automotive) 
+

Comments:

Code:


file: /Techref/io/cars.htm, 2KB, , updated: 2013/7/22 17:18, local time: 2017/10/21 20:52,
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