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Old 02-16-2009, 04:11 PM   #1 (permalink)
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Transmission park sensor problems??

So I have a question about my daily driver- A 97 jeep cherokee with 4.0/auto. I have been having a problem starting the heep about one in every ten times. When you turn the key, all the dash lights turn on (as normal) but no cranky- nothing at all as if it were not in park. No big deal, as I would just wiggle the shifter around and then it would fire up. It has since gotten worse and now it wont fire up no matter how much I move the shifter around. It seems this sensor is going out but that seems like a wierd problem to have. Has anyone had a similar experience? I have also had my check engine light come on and off because of the sensor that tells the trans to go into overdrive. Whenever the light comes on and the sensor is not working, no overdrive. Im not sure if these problems could be linked. I know this is gonna be simple stuff for someone on here so help me out if possible
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Old 02-16-2009, 05:26 PM   #2 (permalink)
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hmm..definately sounds like its the neutral sensor switch. seen it go bad/need cleaning on a ton of cherokees.

check to see if your reverse lights are working. if not, then thats definatly the problem
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Old 02-16-2009, 05:45 PM   #3 (permalink)
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Yeah, the reverse lights are a tell-tale sign of a bad NSS.

You can bypass it using a paper clip...but you will be able to start it in any gear, and your reverse lights will not work.


By the way, this does not belong in the Cherokee forum. Try the Jeep newb section.
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Old 02-16-2009, 08:50 PM   #4 (permalink)
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sensor

I believe that the gear location switch is adjustable, crawl under and look at the mounting bolts, they go thru slotted holes, at least on mine they do.
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Old 02-16-2009, 09:17 PM   #5 (permalink)
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So sorry about the wrong forum post, I realized after I posted. Anyways, its rainin frogs and lizards around here and I just broke my foot- also have no garage. Im wondering if this is something I may still be able to do? Is everything fairly easy access? If anyone has a link with a writeup it would be great. The only writeup I could find had no details of where to access and all. I will coinfirm the problem tomorrow with the reverse light test.
Thanks

edit: while im on the subject, do you guys think a shop would be willing to clean the sensor and not force me to buy a new one. I would normally just fire it out but I need to drive this week and im gimpy right now.

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Old 02-16-2009, 09:21 PM   #6 (permalink)
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Quote:
Originally Posted by Twisty View Post
Yeah, the reverse lights are a tell-tale sign of a bad NSS.

You can bypass it using a paper clip...but you will be able to start it in any gear, and your reverse lights will not work.
Any details on the paper clip use would help. It could be helpfull if it's easy as a temporary fix.
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Old 02-17-2009, 05:06 AM   #7 (permalink)
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Jump the B and C pins with a paper clip. If its starts no prob, then you have your problem diagnosed.


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Old 02-17-2009, 01:18 PM   #8 (permalink)
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Alright, tto update my own thread, Im postin a link to the best writeup I have found. I think I will fire this out without much trouble. Now I see how the paper clip would work as well so thats my falback plan.

http://www.cherokee-jeep.com/1-2swremov.htm
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Old 02-20-2009, 01:19 PM   #9 (permalink)
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alright i was able to pull the two nuts holding the sensor on but ran into a couple problems. First, i cant figure out how to disconnect the wire harness part. Its on the top of the sensor so I cant even see if there are tabs or anythinh holding it on..... I tried pulling on the wires prety hard but didn't want anything to break. A also am having trouble pulling the sensor off from the transmission its self. It will rotate left-right but will not pull off and I cant seem to pry it either. Am I missing something here?
Thanks
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Old 02-20-2009, 01:57 PM   #10 (permalink)
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Can just start it in neutral. My ZJ is like that and I'm not going to fix it... one more thing for a theif to try and figure out to get it to start.
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Old 02-21-2009, 02:16 PM   #11 (permalink)
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Can just start it in neutral. My ZJ is like that and I'm not going to fix it... one more thing for a theif to try and figure out to get it to start.

Yeah mine wouldn't start in either park or neutral. I ended up getting that all back together and now have a new problem though.....

Now when I turn the key, there is power til it turn it to crank the engine, then all power dies and will not come back til i disconnect and re-connect the battery. Could this be related to the switch or not?

Im thinking it may be alarm related as there is one installed but its never been used and I dont have the switch for it.

Any help? I need to drive this week so im tryin to get my sh!t together during the weekend.
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Old 02-21-2009, 06:03 PM   #12 (permalink)
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where is the sensor located
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