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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Obd1 17 pin to obd2 16 pin adapter question

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Old Jan 23, 2015 | 01:23 PM
  #1  
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Obd1 17 pin to obd2 16 pin adapter question

Ok. Quick question

I have a bluetooth obd2 scanner
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which works fine with newer cars using my android phone via bluetooth

my question is. If I buy this adapter
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to connect it to my 87 22re pickup diagnostic plug, will it read anything?

thanks in advance
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Old Jan 23, 2015 | 01:52 PM
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Almost certainly not. The protocols aren't even vaguely related.

So what is the adapter for? Beats me, and I own one.
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Old Jan 23, 2015 | 02:52 PM
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Will not work, The OBD1 diag port on the Toyotas is a sensor and switch junction, Not a data port as OBD2 is.
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Old Jan 23, 2015 | 03:15 PM
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Originally Posted by Punchy
... Not a data port as OBD2 is.
No, the OBD1 port on our trucks IS a data port, it just requires some fancy footwork to read it. Fortunately, one of our members (RJR) has already done that: https://www.yotatech.com/forums/f116...reader-278801/
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Old Jan 24, 2015 | 10:33 AM
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thanks. makes me wonder why would they build an adapter cable for it.
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Old Jan 24, 2015 | 10:45 AM
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Some scanners (Snap-On MT2500 for one) have connectors and software cartridges for different vehicles. I regret the day I sold my Snap-On Scanner, didn't think I'd need it anymore.
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Old Jan 24, 2015 | 10:55 AM
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Originally Posted by bswarm
Some scanners (Snap-On MT2500 for one) have connectors and software cartridges for different vehicles. I regret the day I sold my Snap-On Scanner, didn't think I'd need it anymore.
My old MT-2500 scanner is a Godsend for the OBD1 Toyotas.

If you shop around for awhile on Ebay, you can get one with suitable cartridges and adapters for a couple hundred bucks. I run several different make pre-1997 non-standardised OBD cars and I don't know what I'd do without my old 'brick'.

They cost a bundle, back in the day.
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Old Jan 26, 2015 | 06:34 PM
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No its not, You cannot pull any codes from the Toy OBD1 port, You can only jump it and read the ENG dash light.
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Old Jan 26, 2015 | 08:34 PM
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Originally Posted by Punchy
No its not, You cannot pull any codes from the Toy OBD1 port, You can only jump it and read the ENG dash light.
I guess that you have never used a Snap=On MT2500 on an OBD1 Toyota.

It not only can read the codes, but the software contains a database of what the codes mean.

It may be true that the earlier OBD1 ECMs can give less info than the newest OBD1 ECMs can. I seem to remember differences between what can be got from my '87 and what can be got from my '95 truck.

I even read the TPS output on my '95 Runner and adjusted the TPS using my scanner.

Last edited by millball; Jan 26, 2015 at 08:51 PM.
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Old Jan 27, 2015 | 06:45 AM
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The MT2500 will read codes on just about everything out there. Even the 80's Fords that you were supposed to check codes with an analog swing voltmeter.
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Old Jan 27, 2015 | 06:52 AM
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It's not cheap

http://www.ebay.com/itm/Snap-On-MT2500-Scanner-With-Manuals-Extras-Original-Hard-Case-Good-Cond-/111579766840?hash=item19faac2038&item=111579766840&pt=Motors_Automotive_Tools&vxp=mtr
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Old Jan 27, 2015 | 06:58 AM
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Originally Posted by decalman
It's not cheap
I paid $2k new almost 25 years ago. Had to have it, worked in a diagnostic shop and the Allen test POS wasn't cutting it. If you work in a shop it's a good investment.
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Old Jan 27, 2015 | 07:20 AM
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Originally Posted by millball
...
I even read the TPS output on my '95 Runner and adjusted the TPS using my scanner.
Wow! Uh, not really ....

You don't need a $2,000 (or a coupla hundred) scanner. All you need is a $6 multimeter (you have that already) and the manual (here you go, for free: http://personal.utulsa.edu/~nathan-b...34electron.pdf)

A scanner is nice, mostly because you already have it and know how to use it. But for me, I'm not going to spend even a coupla hundred bucks on a "magic box." I would prefer to know just what signal I'm reading and what it really represents.

Plus, I'm cheap.
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Old Jan 27, 2015 | 07:29 AM
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Originally Posted by scope103
A scanner is nice, mostly because you already have it and know how to use it. But for me, I'm not going to spend even a coupla hundred bucks on a "magic box." I would prefer to know just what signal I'm reading and what it really represents.

Plus, I'm cheap.
It's really nice when you take a road test and can watch the scanner data in real world driving conditions. It paid for itself many times over. But like I said, if you work in a shop it's a good investment. I sold my Scanner and bought a cheap $20 code reader because I'm retired and have no use for it now. The MT2500 also had the code diagnostic procedure, no FSM needed.
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