Can anyone tell me what this sensor is? - JeepForum.com
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post #1 of 12 Old 07-09-2019, 08:58 AM Thread Starter
athyyrasc
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Xj Can anyone tell me what this sensor is?

I was working on my jeep replacing the oil dipstick tube and accidentally bumped this sensor. I suppose the plastic was really brittle and it broke off. Took it to a local dealership parts department and they said it was a "noise" sensor and that I shouldn't nee it anyway. I've been on this forum before and thought I would put this out there to see if anyone else may know what it is. It's located on the passengers side on the side of the block. Thanks in advance.

2000 Jeep Cherokee Sport (Although I think the engine is a 1999 or 1998)
4.0L 6 cyl

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post #2 of 12 Old 07-09-2019, 11:15 AM
CJ7-Tim
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I am pretty sure the Dealership was kinda correct. It is very likely a capacitor at the end of a ground circuit and it helps controlling spark plug or spark rail electrical static noise impulses. It is not a critical part, but the next time you see a 2000-01 XJ in the junkyard you should grab a used one.

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post #3 of 12 Old 07-09-2019, 11:21 AM Thread Starter
athyyrasc
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Cool thanks a lot for the confirmation!
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post #4 of 12 Old 07-09-2019, 11:29 AM
skjeep
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I do not agree. The coil capacitor is used to prevent high-voltage spikes from interfering with the operation of certain
powertrain sensors. It also helps to prevent radio interference

And you have distributorless ignition withh waste spark (with the coilpack being more sensitive to ECM). The capacitor is there for a reason. So if you love your coil pack, PCM and sensors go grab and install new capacitor
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current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #5 of 12 Old 07-09-2019, 12:25 PM Thread Starter
athyyrasc
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Welp, therein lies the problem. Dealer said they couldn't even get it. So I'll have to keep an eye out on a junk yard because I've googled "ignition capacitor 2000 jeep Cherokee" and I can't find anything.
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post #6 of 12 Old 07-09-2019, 03:50 PM
skjeep
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Quote:
Originally Posted by athyyrasc View Post
Welp, therein lies the problem. Dealer said they couldn't even get it. So I'll have to keep an eye out on a junk yard because I've googled "ignition capacitor 2000 jeep Cherokee" and I can't find anything.



you have bad google and bad dealer


it is a 5 buck part- tell the dealer to open 2000 or 2001 XJ in the star parts and search under electrical parts, spark plugs, coils etc




search for any of these part numbers:

56041396AA
56028644AA
56028644AB
56028644AC
56041889AA




it is used in dozen+ applications - for example 2000+ XJ, TJ, WJ with 4.0, WJ with 4.7, all dodge pickups w. 4.7....


for example



https://www.rockauto.com/en/parts/mo...capacitor,7092



https://www.quadratec.com/p/crown-au...-wj-56041889AA
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current 2x XJ, 2x JK-U, SJ, M38A1, WJ
gone XJ, TJ, XK, ZJ
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post #7 of 12 Old 07-10-2019, 08:31 AM Thread Starter
athyyrasc
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Okay cool thanks skjeep. everywhere I looked (although I didn't look for as many part numbers as you show) it would "not compatible with 2000 jeep" or something along those lines. I did see a couple of those #'s come up on google photos and I tried to search the part # based on what I was seeing on those google images. 56041396AA specifically. Even though it looked like what I needed I was going off of it saying "not compatible" or something like that. I had thought about ordering it anyway just to try it.

Regardless, thanks a lot for the help there.
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post #8 of 12 Old 04-19-2021, 11:09 PM
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Thanks folks, I saw that capacitor in my 2000 XJ, did not what it was for, now I will make sure it is there, connected and works. I like to keep my XJ originally reliable.
I checked the P/N 56028644AC in RockAuto found it applicable on 2001 Cherokee only, would that make any difference to 2000 year model?.

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post #9 of 12 Old 04-20-2021, 10:33 AM
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as long as yours is the same, like the coil pack ignition and such, i would imagine it is the same.

i still have the old school distributor on my 99, i think. i don't remember seeing any coil packs when i was in there so i might not have the part on mine

the xj is the only jeep left in the driveway
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post #10 of 12 Old 04-20-2021, 12:24 PM
UKXJ
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My '99's conventional (no different from my '96 donor - in fact, I think some of the ignition system is off the '96) pretty sure coilpacks came in in 2000, & does seem unlikely it changed for '01.

Oh, & OP's to be congratulated on the best "what is this?" photos I have ever seen.

Last edited by UKXJ; 04-20-2021 at 12:26 PM. Reason: hit "send" too quick
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post #11 of 12 Old 04-20-2021, 01:21 PM
Saudade
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What I found interesting is that there is no mention of the coil capacitor in the 2000 parts nor service manual. It is listed in both for the 2001.

Perhaps a mid year change? TSB? Russians?
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post #12 of 12 Old 04-21-2021, 11:47 AM
UKXJ
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Just another example of all literature being out of date before it is printed.

What amazes me, is that the XJ was still evolving and being developed so close to the end of it's production run.
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