Question about 1994 Jeep Grand Cherokee

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1999 jeep cherokee ECU Replacement

Hello, I'm looking for a replacement for my jeep cherokee 99, the current part number is Chysler P56041 492AC, I found a Chysler P56041 492AD, can this computer works ok with my cherokee?

Thank you for your help.

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  • Anonymous Mar 27, 2014

    Hi!! I have a Jeep Wrangler 2002/ 2.5 / 5 spd./ 4 by 4 / computer# P56041-935AE in finding a computer at the Junk Jard all the # must be the same???

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Yes perfectly well.

Posted on Jul 01, 2009

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Hello, I'm looking for a replacement for my jeep cherokee 99, the current part number is Chysler P56041 629AD, I found a Chysler P56041 278AD, can this computer works ok with my cherokee?


THE PCM MODULE.
no country stated, the 728ad shows Europe. (why?)
"I found"

where, at ebay, at pick-apart, or ?
USA cars have 11 PCM for one engine. fact.
and 100s more world wide.
what a question, just a p/n
then you post to grand Cherokee and then text leaving out Grand.?
why?
i searched the part at jeep and is wrangle part, 629ad.

you do know that it must be reprogrammed to your car right:?
the pcms on cars can vary
by engine, trans opted , 4wd/2wd,and year.
federal PCM
Calif PCM
and mexico PCM
and 9 more. just for 1999

is yours 42RE for 45RFE?? tranny??? 30/32 RH? what?
post county (or state if calif)
post engine and year
post body and not contradict.?
post drive line, in car, tranny and if 4wd?
then we can match it up
or call jeep.com

they (jeep) will do this magical thing!
ask you the VIN.
and then look it up in their database.
and see ALL THE ABOVE even what radio is in it. of 5.
me, im a glass half full guy (hard knocks, reality stuff)
id not even believe the part in car is correct.
im too SAVVY !
i find out from jeep what it should have first.

not one matches the 4.0L in the GC.


the 629 posted shows this at jeep.com

JEEP WRANGLER 2.5L Power Tech I-4 Cyl., 3-Spd. Automatic 30RH 1998
JEEP WRANGLER 2.5L Power Tech I-4 Cyl., 5-Speed Manual 1998
JEEP WRANGLER 4.0L I6 Power Tech, 3-Spd. Automatic 32RH 1998
JEEP WRANGLER 4.0L I6 Power Tech, 5-Speed Manual 1998
(if true needs to be programmed to each)

the send number
56041 278AD

lands at.
(part not found, is this a non usa part?) im stumped

was fun to try.
but im stumped.

Mar 31, 2016 | 1999 Jeep Grand Cherokee

1 Answer

ECU Replacement Hello, I'm looking for a replacement for my jeep cherokee 99, the current part number is Chysler P56041 424AH, I found a Chysler P56041 683AD, can this computer works ok with my ...


ECU TOPIC (swaps)
why ask us? we can't see car, or see what drive line is there. nor VIN code.(telling same)
why not ask JEEP.?
amazing ?

ever seen this?

http://www.factorychryslerparts.com/productSearch.aspx?&ukey_make=1064&ukey_model=15529&ukey_trimlevel=0&ukey_modelRange=0&modelYear=1999&ukey_category=0&ukey_driveline=0&isOnSale=0&searchTerm=



computer, ,that is the ECU, and is not the only computer.
here are the ECU rules. (not full, only jeep knows all rules)
it must have same base number.
then needs to be programmed to match your cars, drive line and federal smog laws and year.)
end story.

Aug 21, 2015 | 1999 Jeep Grand Cherokee

1 Answer

Hello, I'm looking for a replacement for my jeep


Check with the folks at the dealership for that. A parts dept. person should be able to run those numbers and give you the meaning, and whether they are compatible or interchangeable. One of the knowledgeable technicians may be able to help you too.

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My jeep cherokee 1990 4.0l is not getting any current in the fuelinjektor


If the check engine light does NOT come on when cranking, at the times when it won't start, and the relays are clicking and buzzing, then your ECU is in need of repair. The engine will only start after the check engine light comes on and the ecu is what controls that. ECU is likely going bad, causing the delayed start problem typical of early 90's jeeps. Reasonably priced repair or replacement services for your jeep ECU are available on ebay.

Aug 08, 2012 | 1990 Jeep Cherokee Limited

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go to rockauto.com and look up the brake part numbers for each. If the part numbers are the same, then they're interchangeable. If not, then no

Sep 25, 2017 | 2001 Jeep Grand Cherokee

1 Answer

No current to injectors 90 jeep cherokee


If the check engine light does NOT come on when cranking, at the times when it won't start, and the relays are clicking and buzzing, then your ECU is in need of repair. The engine will only start after the check engine light comes on and the ecu is what controls that. ECU is likely going bad, causing the delayed start problem typical of early 90's jeeps. Reasonably priced repair or replacement services for your jeep ECU are available on ebay.

Nov 21, 2011 | 1990 Jeep Cherokee Limited

1 Answer

4.0 engine swap limititations


Hi, The earlier engines had a distribitor for the spark plugs, but later engines for the 1999-2004 cars, have a coil on top of each spark plug controlled by th PCM (or ECU). It may be possible to modify an older engine by using all the ignition gear from your later unit, but I haven't tried. Maybe ask at a Jeep used parts supplier, who may have done a similar job.

May 19, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Body Cladding for 99 Grand Cherokee Laredo


there is a company called quadratec they make cool stuff for jeeps. go one the web and look it up. cherokee's Grands and wranglers. they have alot of stuff to make the jeep look good. and replacement panels and plastic and diamond plate trim. enjoy.

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