4runner Computers
04-03-2008, 09:23 PM
#6
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Yeah obd1 good thing my car wasnt 3rd gen and newer when my cat was stolen.
3rd gens have obd2 and if your cat is stolen, it costs upwards of $300...
Not sure about the computer program, but for the time to hook your car up to your computer, probably less time consuming and not too much more to just take it somewhere and get the numbers you want.
3rd gens have obd2 and if your cat is stolen, it costs upwards of $300...
Not sure about the computer program, but for the time to hook your car up to your computer, probably less time consuming and not too much more to just take it somewhere and get the numbers you want.
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04-03-2008, 09:46 PM
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i just want to find a diagnosing software so i can do it my self and so i can see how the engine is running, and do some changes to the computer
04-04-2008, 01:02 AM
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everything before 1995-1996 is OBDI. OBDII started officially in 1996 when J1930 made it a requirement for all new vehicles. This is why the third gen pickup ended and the tacoma started in 1995.5
04-04-2008, 07:06 PM
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I'm going with gametom. And where bouts in Ontario are you? I can show you how to get the codes with a jumper if your around Sarnia. I'm here for another 3 weeks then its home for summer. I've done it on the 3vzes and my diesel has the same system so I know how to get them.
04-05-2008, 03:26 PM
#15
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Correct me if Im wrong, but I dont think that he is looking for a tool to just pull codes with, but to view sensor inputs and fuel curves, that kind of stuff, and maybe reprogram curves? If thats the case, im interested too.
04-05-2008, 03:46 PM
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The OBD1 computer puts out a continuous stream of information including speed, injector timing, advance, throttle position etc. It's in a serial stream of about 110 baud. Despite my efforts, I haven't found a computer program to read it, nor a source to decode each bit position. (The above information is by using an oscilloscope and other tools.)
This is, of course, much more than just codes.
If someone has the documentation on this, I'm certainly interested.
This is, of course, much more than just codes.
If someone has the documentation on this, I'm certainly interested.
04-05-2008, 06:12 PM
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Check this out www.rennacs.com
Raj
Raj
04-07-2008, 07:23 PM
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You can't reprogram OBD computers in their stock state. The info is permanently flashed on a chip.
The only way to change the fuel/ignition maps on the computer is to modify the computer by either adding a) a removable chip or b) adding an extension board with will plug directly into your computer (via USB or Serial) and programming it from there.
a) This requires very minor modification (at least on Honda ECUs), just solder in an connector for the chip and stick your chip in it. The only problem with this is its like burning a CD-R, you can only do it once and its permanent. So every time you make a change you have to flash a new ROM onto the chip, crack open the ECU, and stick it in.
b) I only know of these devices for Hondas, personally. I have a Hondata s300 installed in my integra's ECU and it's possibly the best money I've spent on my car. Plug in the laptop, download the maps from the ECU, modify it, datalog, etc. This can all be done while the car is running without disrupting it from running.
- - - - -
I know AEM makes a standalone ECU (but its upwards of $1500) that fully replaces your ECU, but will not pass smog because its a completely different unit. You can use the AEM unit in any OBD vehicle from what I've read up on it, you just need to have the right maps installed for the vehicle. You can find basemaps for different vehicles on their website.
This is all really expensive stuff. Option A is usually a couple hundred bucks, Option B for my honda application was $600, and the AEM is $1500 and up but is fully standalone.
Hope this helped.
P.S.: first post woohoo! lol
The only way to change the fuel/ignition maps on the computer is to modify the computer by either adding a) a removable chip or b) adding an extension board with will plug directly into your computer (via USB or Serial) and programming it from there.
a) This requires very minor modification (at least on Honda ECUs), just solder in an connector for the chip and stick your chip in it. The only problem with this is its like burning a CD-R, you can only do it once and its permanent. So every time you make a change you have to flash a new ROM onto the chip, crack open the ECU, and stick it in.
b) I only know of these devices for Hondas, personally. I have a Hondata s300 installed in my integra's ECU and it's possibly the best money I've spent on my car. Plug in the laptop, download the maps from the ECU, modify it, datalog, etc. This can all be done while the car is running without disrupting it from running.
- - - - -
I know AEM makes a standalone ECU (but its upwards of $1500) that fully replaces your ECU, but will not pass smog because its a completely different unit. You can use the AEM unit in any OBD vehicle from what I've read up on it, you just need to have the right maps installed for the vehicle. You can find basemaps for different vehicles on their website.
This is all really expensive stuff. Option A is usually a couple hundred bucks, Option B for my honda application was $600, and the AEM is $1500 and up but is fully standalone.
Hope this helped.
P.S.: first post woohoo! lol
