Reading up on some gadget news today, I read that all cars manufactured since 2000 have OBD-II installed beneath the dashboard, which enables it to communicate with gadgets such as the ‘AutoBot’ (tracks your car) and CarTrip (stores your car data on an iPhone). I was wondering who has actually experience with using the OBD-II with these or similar gadgets? Sounds interesting…!
Acctually, since 1996 they’ve had OBD-II.
It is what your mechanic uses when they connect a diagnostic scanner. Essentially, anything your car’s computer knows is available through it.
If you are interested you should talk to your auto shop instructor.
I haven’t actually played around with it myself, but NerdKits has a tutorial on interfacing electronics with the OBD-II in your car. http://www.nerdkits.com/videos/obdii/
It would probably make a pretty awesome project… for after build season of course
OBD is good for Diagnosing problems, but that’s about it. Without high $$ hardware, you cant do much else with it.
OBDII is for diagnosing CEL, SRS, etc. codes.
Easy to pull, at least on my car. the dashboard flashes all the lights in a certain series depending on the problem.
Just avoid causing damage to that very expen$ive engine control unit…
Yes, you can read out the On-Board Diagnostic (OBD) fault codes, which can help in diagnosing the problem. But there is a wealth of vehicle operational data available on that connector, such as fuel economy, vehicle speed, and more.
Inexpensive (<$100) testers are readily available.
The “high $$ hardware” are manufacturer systems, which work on every system in the car (like A/C, seats, locks, etc.), not just the emissions-relevant ones covered by the OBD laws.
As for the original post: There is a LOT of info on the web about OBD II, since it’s a publicly-documented system. The OBD connector is under the dash, but the ‘computer’ behind it can be located anywhere.
We’re thinking on two different wavelengths here. By diagnosis I was encompassing everything you stated.
The the expensive tools I am thinking of, are for performance programming. Fuel maps, engine management, timing advancement, 02 Delete, disabling emissions control devices, things of that nature.
Thanks guys! I appreciate your very informative replies.
Some of the newer cars report over 70 sensor outputs through OBD-II. It’s a pretty rich data stream.
A Vacuum gauge is all you need to hypermile. That tool is simply a detuned codepuller.
OBD-II comunicates via can right?
Hook a black jag into it and read the data from the serial end of the jag.
Use the jag later to build a robot or
use the jag to use your car as the robot