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95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

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Old 01-24-2009, 01:05 PM   #1
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Diagnostic Port Under Hood vs. OBDII Port Under Dash?

What is the difference between the Diagnostic Port under the hood and the OBDII Port under the dash?

I just purchased a OBDII reader and was going test it out on the port under the hood, but the plug is completely different than the one under the dash. I'm guessing they provide different types of data to the technicians, but I know someone on this board knows the real reason.

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Old 01-24-2009, 10:49 PM   #2
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From what I have heard that plugs gives further access to Toyota Technicians and their proprietary diagnostics systems. I can't remember but I don't think you can access the ABS or SRS systems from the OBDII port but can through the Diagnostics Port. I think also systems tests can be run through the diag port.
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Old 01-24-2009, 11:33 PM   #3
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i haven't seen one under the dash on my 98 that must be a 99-up thing
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Old 01-25-2009, 12:18 AM   #4
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Quote:
Originally Posted by Elton View Post
i haven't seen one under the dash on my 98 that must be a 99-up thing
No there is one, next to your right leg in the drivers seat.
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Old 01-25-2009, 12:27 AM   #5
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hmm ill have to look again ive had most of the dash took out on that side don't remember seeing it
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Old 01-25-2009, 07:13 AM   #6
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Quote:
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hmm ill have to look again ive had most of the dash took out on that side don't remember seeing it
every vehicle 96 and up has to have an obd 2 port within so many inches of the steering wheel, everything after 96 is obd2
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Old 01-30-2009, 04:03 PM   #7
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96 sr5 obd 2

I looked for OBD2 plug under dash ,in dash ,behind ash tray and I couldnt find it either, Help !
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Old 06-17-2011, 01:21 PM   #8
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i have a 97 and have been told the same about under the dash just above your right leg. still cant find it. i must be crazy or there is not one in mine.
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Old 06-17-2011, 05:49 PM   #9
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It's actually where the center console meest the kick panel. It's very well hidden and a PITA every time I plug/unplug my Scangauge2 for another vehicle.
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Old 06-17-2011, 06:51 PM   #10
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the obd2 port is fed mandated to have info available in all systems to a point, early models are not available through port due to lack of mandate before 2000 and lack of need by builders, toyota's scaner can accesss all comps starting in 2001 models, Some ABS and SRS systems are still not mandated for basic access by aftermarket scaners. under hood conector is obd gen one and lots of info not available but can flash the mil lights for generic code reading.
both obd2 plugs for 1996-2004 4 runner and tacoma

Click the image to open in full size.
located behind the coin pouch thingy
Click the image to open in full size.

Last edited by toyotacharles; 06-17-2011 at 09:24 PM.
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Old 06-20-2011, 10:30 AM   #11
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took my entire dash apart this weekend to run my antenna wire for my cb. no port was found. i searched for a good minute too. i feel really dumb about this. i cant wait for one of my lights to come on so i can take it in and watch where they hook up to.
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Old 06-20-2011, 11:08 AM   #12
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post some pics of the under side of your dash on driver side pointing up on both sides if i see it i will copy it and put an arrow on it so you can see it. do you have a couin pouch on knee kick panel?
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Old 06-20-2011, 11:41 AM   #13
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No I don't. I will get it done either tomorrow night or tonight for sure. Thanks
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Old 06-20-2011, 05:18 PM   #14
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ok srry for spelling error will look for them then.
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Old 09-21-2011, 07:09 PM   #15
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noneckrex,

i have a 98 4runner so i'm guessing your 97 has it in about same place...
here is mine, just to the right of the gas peddle (pretty well hidden)
Diagnostic Port Under Hood vs. OBDII Port Under Dash?-plug..port.jpgDiagnostic Port Under Hood vs. OBDII Port Under Dash?-close.plug..port.jpg
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Old 09-22-2011, 08:30 AM   #16
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Wow - way to post good useful pics on your first post, Gregls. That doesn't happen often. Thanks and welcome.

I just went out to look at my new (to me) '98 Runner. Man, at least on mine it's just right there like Gregls'. As soon as you crouch down and look in that direction you can spot it. On mine it's NOT at all well hidden. Yeah, you can't see it from the driver's seat or standing outside the vehicle, but if you crouch down it's easy to spot. Doesn't look like it'd be hard to hook up to but I guess you never know until you try - I'll have to put my scanner on it when I get home, but it hangs down below the trim a little and is well spaced from everything around it.

What that means to other folks trucks I have no idea.....

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Old 09-24-2011, 12:25 PM   #17
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Scanner plugin easy

Doesn't look like it'd be hard to hook up to but I guess you never know until you try

Chris[/quote]

I plugged mine in once and it was super easy to get on and off. I think that's why the car's hookup is pointing straight down too keep junk out of it.
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Old 09-24-2011, 12:25 PM
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2002, 2003, 4runner, 94, 95, computer, connector, diagnostic, forerunner, ii, location, obd, port, runner, toyota

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