> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
Behalf
> Of microsoftwarecontrol
> Sent: 12 November 2008 16:56
> To: piclist@mit.edu
> Subject: [PIC] want to read car obd ii,
> 
> just changed egr P sensor and fix engine light on of my car.
> 
> Also find out, to read OBD II code, you can know all working condition
of
> all sensors.
> 
> Any body worked out to read it, by PIC rs232?

OBDII covers a multitude of different protocols, and you have to pay the
SAE to get a copy of those protocols!

There are some cheap-ish solutions for certain cars e.g. VAG-COM for VAG
group cars, and you can buy low cost stand-alone scanners that cover
most of the standard OBDII protocols (check eBay).

http://www.elmelectronics.com/thehome.html do a range of RS232-OBD2
converter chips which are quite inexpensive e.g. ELM327 which covers SO
15765-4 CAN, SAE J1850 PWM, SAE J1850 VPW, ISO 9141-2, ISO 14230-4 and
SAE J1939.

Regards

Mike

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