1997 ZJ Camshaft Position Sensor Replacement - JeepForum.com
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post #1 of 16 Old 02-15-2011, 07:33 PM Thread Starter
firehawk1
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1997 ZJ 
 
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1997 Grand Cherokee ZJ Crankshaft Position Sensor Replacement

Hello all,

I looked around for some decent pictures or instructions on replacing the Crank Sensor on my 1997 ZJ but could not find any so i decided to make my own.

I found using this many extensions made it much easier to be able to turn the ratchet as the trans shifter is in the way, about 10 more inches would have been perfect though. The Crank Sensor bolt size is 11mm. I used a swivel extension on the end and it worked perfectly.
The long bolt is for pushing the sensor from the plug over the trans housing onto the other side.


This photo is taken from laying under the vehicle feet out the passenger side just in front of the cross member that holds the trans up.

The shift cable is sitting right on top of the CPS so i found the best place for it was being pulled slightly down below the Crank Sensor so i could pull it up once it was unbolted.

A little better idea of where it is.


For the sake of the picture i moved the shift cable to the side but the Crank Sensor pigtail would prevent any upward movement of it from here so pull the shift cable down toward you.

It was pretty stuck in here, i had to twist and pull upwards to be able to get it loose but it came out.

The spark plug wire you see is Cyl #6 looking down from the passenger side behind the motor. The Crank Sensor wire is the small one coming out from behind the block going into the large connector just under my hand.

Unplug your old one and plug the new one in. Push it on top of the bell housing over to the other side. I had to use a long rod/bolt to get it across as the new wire was stiff from being wound up in the box.

Getting the new Crank Sensor in was oddly much harder than getting the old one out. I had to angle it in just the right way so that it would slide into the hole and not be too tall and hit the body.


I had to thread the bolt on with just the socket on because the angle was just too odd.


Tighten it up. I read around that the proper torque is 60 InLbs but i didnt have a torque wrench on my so i just guessed


If there is anything i left out please let me know

Thanks


Last edited by firehawk1; 08-20-2014 at 10:47 AM. Reason: Fixed typos
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post #2 of 16 Old 02-15-2011, 08:03 PM
ZeeJay1997
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Good contribution to the cause, but there a couple of things that need to be straightened out.

It's a crankshaft position sensor. There are several different abbreviations used so I generally just say crank sensor to avoid confusion. People get confused with the CPS, that's in the distributor.

You are missing a wire guard on the crank sensor. It keeps your cable off the sensor and wiring.
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post #3 of 16 Old 02-15-2011, 08:11 PM Thread Starter
firehawk1
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Quote:
Originally Posted by ZeeJay1997 View Post
Good contribution to the cause, but there a couple of things that need to be straightened out.

It's a crankshaft position sensor. There are several different abbreviations used so I generally just say crank sensor to avoid confusion. People get confused with the CPS, that's in the distributor.

You are missing a wire guard on the crank sensor. It keeps your cable off the sensor and wiring.
Thanks, I saw it being called the CPS in another thread so i figured that was alright. I believe the wire guard you are talking about is just not in any of the pictures, it did come with plastic loom around the wire exactly like this one if that is what you meant. =)
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post #4 of 16 Old 02-15-2011, 08:19 PM
ZeeJay1997
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The wire guard is a piece of metal that goes under the bolt head and wraps upward to route the wire back the other direction. It is a pain to get back on once it's off. Yours being missing is an indicator that someone has probably changed the crank sensor before.
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post #5 of 16 Old 02-15-2011, 08:28 PM Thread Starter
firehawk1
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Quote:
Originally Posted by ZeeJay1997 View Post
The wire guard is a piece of metal that goes under the bolt head and wraps upward to route the wire back the other direction. It is a pain to get back on once it's off. Yours being missing is an indicator that someone has probably changed the crank sensor before.
Ah okay, yeah there was nothing on there when i took it off. Odd that it would be missing though because owner before me was a little old lady who always took it to the dealer apparently.
Thanks though =)
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post #6 of 16 Old 02-25-2011, 01:09 PM
jeeper96
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Quote:
Originally Posted by firehawk1 View Post
owner before me was a little old lady who always took it to the dealer apparently.
Thanks though =)
HA, you find it odd that a dealership would half-*** something?
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post #7 of 16 Old 02-25-2011, 01:16 PM
little_Jeep
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When I replaced the Crank Sensor in my WJ, getting that 11mm bolt started was a pita, until I used an old mechanics trick. Like you, I used the long extention to remove the bolt. Then when I was ready to put it back in, I used a little duct tape to cover the head of the bolt, then I forced it into the socket. This makes the bolt nice and tight in the socket and holds it in place while I used the long extention to fish it into place and tight it down. This process was quick, easy, and it worked like a charm.
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post #8 of 16 Old 02-26-2011, 07:57 AM
jeeper96
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Thanks for this post! My current problem is located here: http://www.jeepforum.com/forum/f13/h...dying-1167155/ and from the research I've done I think this is going to be the next thing I replace. Thanks again for making my life next weekend just a little easier!!!
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post #9 of 16 Old 02-26-2011, 08:00 AM
little_Jeep
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Quote:
Originally Posted by jeeper96 View Post
Thanks for this post! My current problem is located here: http://www.jeepforum.com/forum/f13/h...dying-1167155/ and from the research I've done I think this is going to be the next thing I replace. Thanks again for making my life next weekend just a little easier!!!
At least on a WJ, no matter what you do to make the job easier, it is still a royal PITA.
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post #10 of 16 Old 02-28-2012, 01:31 PM
97CherokeeSport
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Hi there, I have a 1997 Jeep Grand Cherokee 4.0L with the 42re automatic. I am swaping in an AX-15 5-spd manual. I need to get the Crankshaft POsition Sensor for this to work properly. I need the CPS for the manual trans, not the auto. Can anyone help me find one!?



Thanks in advance!
Cole
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post #11 of 16 Old 02-28-2012, 01:31 PM
97CherokeeSport
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The auto CPS has 3 terminals and the standard has 6 terminals I believe, would this be the correct one, would it still work?
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post #12 of 16 Old 02-28-2012, 01:41 PM
little_Jeep
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Quote:
Originally Posted by 97CherokeeSport View Post
Hi there, I have a 1997 Jeep Grand Cherokee 4.0L with the 42re automatic. I am swaping in an AX-15 5-spd manual. I need to get the Crankshaft POsition Sensor for this to work properly. I need the CPS for the manual trans, not the auto. Can anyone help me find one!?



Thanks in advance!
Cole
The 1997 Cherokee doesn't show a Crankshaft sensor for a manual transmission. However, if you drop back to a 1996, there is a Crank Sensor listed for a manual transmission. You might want to take the sensor that came out of the vehicle, for a walk to your local parts supplier. Since 1996, esp. late year 1996 Cherokee's shared a lot of parts with the 1997, you might get lucky.


I just checked and they list two different part numbers for the 1997 Cherokee with the 4.0L.....
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post #13 of 16 Old 02-28-2012, 03:25 PM
Snowfan2
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97 Cherokee, 97 Grand Cherokee, Cam sensor, Crank sensor....at least fix the title.
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post #14 of 16 Old 02-28-2012, 04:05 PM
little_Jeep
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Quote:
Originally Posted by Snowfan2 View Post
97 Cherokee, 97 Grand Cherokee, Cam sensor, Crank sensor....at least fix the title.
Oh man........ I didn't see the 1997 ZJ, I only saw the 1997 Cherokee... Did they even offer the manual in a AS built 1997 ZJ?
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post #15 of 16 Old 01-12-2014, 02:25 PM
diablo10000
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the crank sensor is commonly referred to as a CKP sensor and the cam sensor is referred to as a CMP sensor, so there ya go clarification done lol


unfortunately i'm having to do the CKP on my wife's 03 WJ 4.0L also
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