Quote:
Originally Posted by garfull
Could the "commanded equivalence ration" be the same thing?
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I am not sure what commanded equivalence ration is but here is some more info for you and anyone else who might be interested or want to help in finding some of the things that people want
A long time ago, in a far away place, some people with some knowledge and power decided to make the CAN networks a standard in vehicles. OBD2. There are a list of standard parameters that all vehicle manufactures must have and the the locations (PID's) must be the same as well. Wiki goes into this a little
here.
Apps like Torque Pro come pre loaded with these PIDs. Any non standard PID that we can find can be added (oil temp).
Then you ask.. well torque has a knock monitoring add on so knock must be available too right?? well NO.. Knock is not a "standard" PID so they would have to find and make a custom pid for every vehicle with knock correction. what that add on has done is monitor ignition timing (a standard PID). It then looks for spikes in timing which it "sees" as knock correction. if the same knock correction occurs at the same rpm with a similar drop it will "forget" that knock assume it is just normal, and not display it again. That's why you must run that add on multiple times before it becomes accurate. If you can even call it that.
CANBUS communication is so fast and durable that the car manufactures use it far past what is required in the standard. To go with this though, they have started using their own protocols. Toyota uses something called SSM (i think). from what I understand its just like a different language. If there is only two people speaking Spanish in a room full of Germans you can keep the conversations separated. Regardless the information is there you just need to know how to get it. There is MUCH MUCH MUCH more information getting transmitted though these other protocols than is being transmitted through the "standardized protocol".
To sum up.
I am still learning.. My arduino should be here in about a week. Then I have to learn how to use the thing. And then start sniffing around to find what I am looking for. Its a hobby to me, I would like to believe I am a cool geek, but its going to take some time. I am sure the guys at rom raider will probably crack everything before I find the little things I want but it gives me something to do in the mean time.