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Unread 06-05-2013, 05:18 PM   #1
SCACExOFxSPADES
Registered User
2004 KJ Liberty 
 
Join Date: Apr 2013
Location: Pittsfield, MA
Posts: 6
Speed Sensor

Got an 04 Jeep Liberty 3.7L auto. I know I need to change the speed sensor. Problem is, where is it? I know people have said look on the rear diff, which i replaced the sensor and the harness, but that hasn't solved my issue. I've been told that that's just an ABS sensor and the Jeep get it's speed from the tranny. I was told to look on the transfer case, but I can only find the x-case position sensor. Anyone have a diagram specific to my Jeep or know where I can get one? The Haynes manual I have doesn't even list it...

Thanks.

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Unread 06-05-2013, 10:49 PM   #2
MedicPatriot
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Join Date: Jun 2013
Location: Baltimore, MD
Posts: 10
Pull the codes at all? I had a mechanic pull my codes for free and it said something like "Left Right ABS/Speed sensor fail". In my 05 that's on the rear diff. I replaced the sensor and wiring too and it still doesn't work. Then I switched the wiring in case I mixed up the pos and neg ends...still doesn't work! Some people say there could also be a dirty tone ring in the rear diff...but I have not investigated this yet.
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Unread 06-06-2013, 03:08 AM   #3
Billwill
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2002 KJ Liberty 
 
Join Date: Jul 2007
Location: South Africa
Posts: 965
Quote:
Originally Posted by SCACExOFxSPADES View Post
Got an 04 Jeep Liberty 3.7L auto. I know I need to change the speed sensor. Problem is, where is it? I know people have said look on the rear diff, which i replaced the sensor and the harness, but that hasn't solved my issue. I've been told that that's just an ABS sensor and the Jeep get it's speed from the tranny. I was told to look on the transfer case, but I can only find the x-case position sensor. Anyone have a diagram specific to my Jeep or know where I can get one? The Haynes manual I have doesn't even list it...

Thanks.

The sensor is on top of the rear diff...it is polarity sensitive so make sure it is wired the correct way around. You may still have a bad connection or broken wire somewhere which you will have to trace. I had a bad connection which I fixed...took about 100 miles of driving before the circuitry was happy and the speedo started working and CEL went out.

The 2005 CRDs have a factory issue where the wrong lubricant was put in the diff...this chewed up the sensor so the dealers would have to replace the sensor and put the correct fluid in the diff....don't know if this applies to any other years/models.

You can download the relevant year KJ Service manual here.....includes circuit diagrams.....the 2003 year model will be close enough to your 2004 KJ.
http://www.colorado4wheel.com/manuals/Jeep/KJ
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2002 2.5 Export CRD Manual 5 speed.
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Unread 06-07-2013, 03:33 PM   #4
SCACExOFxSPADES
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2004 KJ Liberty 
 
Join Date: Apr 2013
Location: Pittsfield, MA
Posts: 6
Can't pull the codes because when I had to replace the instrument panel, I started it while it was out to test the first one. I guess after doing that, it popped every code. Either that or it shouldn't be on the road what so ever.
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