po705 NSS issues and ohm readings
#1
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po705 NSS issues and ohm readings
Hey guys, I know the nss topic has been beaten to death on here but I've read every thread about it and my issue seems to be unique.
So when I bought my 99 cherokee sport 4.0 aw4, the reverse lights didn't work and I very randomly had no overdrive. I tried taking off the old nss to clean it but the plastic housing cracked on removal so I bought an autozone/duralast nss for $270 since the local jeep dealership wants $440 for one.
I put it on and immediately get code po705, I then tried adjusting it multiple times but nothing ever changes. It always starts in park and neutral and my reverse lights always work, but whenever the po705 code pops up I lose overdrive. If I erase the code, I can drive around absolutely fine and overdrive works but once the code comes back I immediately lose it.
I used post #9 in this thread (https://www.cherokeeforum.com/f2/che...-p0705-141863/) to ohm test the switch and here are my results..
trans in park/probing A and G= infinite resistance
trans in 3/probing A and G= .6
trans in 3/ probing A and H= infinite resistance
trans in 1-2/ probing A and H=infinite resistance
trans in 1-2/ probing H and E= infinite resistance
trans in reverse/ probing H and E= infinite resistance
trans in reverse/ probing A and B= infinite resistance
Im starting to think the autozone sensor is bad, does this seem likely?
So when I bought my 99 cherokee sport 4.0 aw4, the reverse lights didn't work and I very randomly had no overdrive. I tried taking off the old nss to clean it but the plastic housing cracked on removal so I bought an autozone/duralast nss for $270 since the local jeep dealership wants $440 for one.
I put it on and immediately get code po705, I then tried adjusting it multiple times but nothing ever changes. It always starts in park and neutral and my reverse lights always work, but whenever the po705 code pops up I lose overdrive. If I erase the code, I can drive around absolutely fine and overdrive works but once the code comes back I immediately lose it.
I used post #9 in this thread (https://www.cherokeeforum.com/f2/che...-p0705-141863/) to ohm test the switch and here are my results..
trans in park/probing A and G= infinite resistance
trans in 3/probing A and G= .6
trans in 3/ probing A and H= infinite resistance
trans in 1-2/ probing A and H=infinite resistance
trans in 1-2/ probing H and E= infinite resistance
trans in reverse/ probing H and E= infinite resistance
trans in reverse/ probing A and B= infinite resistance
Im starting to think the autozone sensor is bad, does this seem likely?
#2
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im guessing but i read here once about cable adjustment fixed a no od problem. i paid no attention since i had no problem??
also is the new sw adjusted exactly right? would affect resistance
also is the new sw adjusted exactly right? would affect resistance
#3
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I've adjusted the new switch in many different positions, it's currently set in the middle of the reverse lights being off and on
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I appreciate the help, I reset it and took it for a long drive. the code came on and still had no overdrive, shift points seemed a little less lazy.
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So this morning going to work I had no overdrive on the highway, it was fully up to temp before driving. On the way home from work I had overdrive on the highway with the check engine light still on. Going to reset the ecu/tcm and possibly go buy a new tps from the dealership today
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#8
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today I replaced the tps sensor, reset the ecm/tcm, and re adjusted the nss. sure enough the code came back on during the test drive.. gonna get a refund for the autozone nss and buy one from the dealership and try that. if that doesn't work then I have no idea whats even left to try.
#9
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Sounds like you got a bad new one. Why not get one from the parts yard and refurbish it? The place I deal with has a policy that if the part you get there is no count bring it back for another one until you get a good one. Had to do this twice with a 22R Toyota carb.
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theres not really any pick and pull yards around here, a family friend owns a small auto recycling yard but I doubt he has any xjs. I'd rather just get a brand new one than drive a couple hours out of the way for a used one. But the dealership wanting around $450 for one definitely sucks
#11
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I'm in the same situation as you as far as JY's go. Local ones literally crushed everything when metal prices were up. Now it's a 1 1/2hr drive.
Maybe give Rock Auto a try for a NSS. GOOD people to deal with.
http://www.rockauto.com/en/catalog/j...ge+sensor,4584
Maybe give Rock Auto a try for a NSS. GOOD people to deal with.
http://www.rockauto.com/en/catalog/j...ge+sensor,4584
#12
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I usually do order parts from rockauto but I think I'm just gonna fork over the cash to mopar so I can go oem and avoid any possible bad new parts. never thought a neutral safety switch would give me so much problems lol. thanks for the help
#13
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Your quite welcome. Shame yours busted on you. But then there's no guarantee refurbishing yours would have helped either. I think it was Cruiser54 that had bad contacts in his making it unusable. Hope you get her straightened out.
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Year: 2000 and 1998
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i have no trouble,yet, but on ocassion get a check lite and reset. its ok but what causes a check lite, 705 ?? if no trouble
still wondering
still wondering
Last edited by nujeepguy; 01-20-2017 at 01:52 PM.
#15
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My understanding is it involves the NSS(bad,dirty,or out of adjustment),its wiring harness,and its connector. Before refurbishing mine I first had no b/u lights. Then intermittent starting problems in park. Then in neutral. Crazy thing is it never did trip a code.