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Old 05-21-2008, 05:40 AM   #156 (permalink)
LostCause's Avatar
Join Date: Feb 2008
Location: California
Posts: 504

Thunderbird - '96 Ford Thunderbird
90 day: 27.75 mpg (US)
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Great work on developing the fuel gauge. Since Mark I is the basic VSS/injector MPG method, I suspect Mark II will use the OBDII protocol.

If that is the case, here is a resource that shows circuits for converting OBDII to serial. Also, the basic coding structure of all the OBDII interfaces is shown. This is above my head, but hopefully not above others.

EDIT: Probably the cheapest interface chip for OBDII -> RS232. It covers all the old protocols (ISO 9141, PWM J1850, etc.) and the new CAN bus.

- LostCause

Last edited by LostCause; 05-21-2008 at 06:25 AM..
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