Whats Your PCM Number

[LuluBelle]

I thought this might be interesting as we are having this discussion over on " Why is it Hard to Start When Cold"
Lets Take a Survey.....................
Everyone there is a sticker on your PCM under the hood near your air filter box Please post the Big Number Here
96 XJ Limited 252
99 XJ Sport 494AE
What's Yours?
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[Jonny Jeep]

Those last digits of the PCM part number differentiate which model/engine/transmission and emissions package the PCM is set up for. The last letters indicate revision which could change due to various reasons.

I can't find any PCM ending in 252 in the parts lists, so don't know if that's aussie specific or not.

The 99 XJ parts list shows 494(AC) indicates a 4.0L Auto with Euro emmissions.







If similar to TJs up to 97 don't have a vacuum leak detector pump, which was fitted from 98 on. 97 TJs also didn't have cruise as an option. Pin outs are I think the same otherwise. Later PCMs changed plugs/pinouts so aren't swappable in TJs.

Similarly, XJs 96-99 might be swappable as long as engine and transmission match. Leak detection faults might be generated though on early models if using a newer PCM. I'd have to look at the XJ PCMs to check connectors/pin outs and determine what other PCMs might be swapped.

[awg]

well both my April '96 have a 252, and my Oct 96 has a 293 ( I think).. not shown in oifficial 94-96 Parts Manual, but advertised on Ebay for repair/exchanhe from USA

Anything after 96 has an immobilisr too, so that would be an issue

I would try the guy who wrecks them in Bowral or Mittagong via Gumtree, he seems to know his electrical stuff well, very reas9onable prices

a spare 252 is a good thing to have, even netter if it solves yr problem

[LuluBelle]

"If you need a replacement PCM for a 1996 XJ, the part number must match exactly, number for number. 1996 was a transition year from OBD-I to OBD-II and there are no other model year PCM that are known to interchange."...... so a guy over on jeepforums says...... I know Dual Post but relevant to both threads
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/__l_l_,\____\,___
l_---l_l__l---[ ]llllll[ ]
_.(o)_)__(o)_)--o-)_)

[awg]

think I have some evidence for you.

in my opinion, a pre '96 will not work, as they are OBD1

a '98 or later will not work, due to different trans communication and immobiliser issues

that leaves 96-97.

I suspect any vehicle with an immobiliser will not work on a '96

however, from these 2 ads, and fact, these 2 computers should work for your 96..a 252 and a 293

https://www.automodulesource.com/150...6-gas-ecm.html


https://www.ebay.com/itm/Jeep-Cherok...d=113659502410

In one of the ads, it cross references the other parts as compatible

neither are listed in the 94-96 Parts Manual, which is pretty mystifying

[LuluBelle]

Well Back to what I thought this thread might be used for
Reference Only
I know everyone is only trying to help me with my issues But I thought this might help someone in the future know what PCM is best for their year XJ
So far we know a 96 likes a 252 (April..I will check my build date) and a 293
a 99 Sport likes a 494 AE...I will check the build date
Please post your Year PCM Number and Build Month
Thanks all Lets Create a Database
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/__l_l_,\____\,___
l_---l_l__l---[ ]llllll[ ]
_.(o)_)__(o)_)--o-)_)

[heatlocke]

Ok, Mine is a 96 Cherokee sport, 4.0 HO 4X4 with automatic.
My BIG number is 296.
Some additional numbers are AG90N1WT, P56041, T2556 and JB5AA

Guess the pic is upsidedown because you guys are Down under...Hee..Hee,Hee