Does cel come on when u turn the key on I'm going thru a similar struggle. Supposedly if a PCM causes a no start ur cel will not come on for 3 seconds when key is turned on don't know if that work if the vehicle starts or not

 

cant help you with your problem, just wanted to say i wouldnt put my phone number for the whole world to see

 

Yes, you can swap PCM's without having them flashed, so long as drivetrain options are the same. The big issue to look out for is getting a PCM out of a Jeep that does NOT have the factory security system. The easiest way to check is to look for wires hooked up to the door lock cylinders. The factory security module will permanently 'register' itself to the PCM, so a PCM installed in a ZJ with the factory security system will need to 'see' the security module in order to start and run the vehicle. As long as you pull a PCM out of a Jeep that does not have the factory security, you can install it in your Jeep without issue regardless of whether or not you have the factory security system.

 

Replies

Yes i do have a cel light that comes on. Ive read about that.

I dont care who calls me at this point i need to leave to ny in a week and need this fixed. I need pcm r5010381ab

Mines has the anti-theft system. Do the numbers have to match exactly ?
i cant find this one on ebay at all. I feel like im screwed.
And if theres does have anti-theft will it mess up my system if i put the original pcm back in ?

 

Yes look for the same numbers. The numbers are a code to the pcm you require. Each number is an identifying code to a option you have including the alarm. Check the jys ebay barely has the one you looking for. but both autozone and advance sell remans. Theres two numbers on it you only need one. I add a dielectric grease to the connection.

 

http://shop.advanceautoparts.com/we...e-control-computer--remanufactured-cardone_20701977-p?searchTerm=ecm#fragment-2

check this link this is what im worried about when i look it up they have different model/ serial numbers on the specs page than mines ...
Another thing here is mines already an aftermarket or is this original im seeing way diff numbers on ebay...



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Well i just went to autozone and purchased a PCM and waiting for it to arrive. in the mean time the zip tye trick seems to be working i have no codes and been driving today with no issues. .........

 

You have 5-6 http://www.picknpull.com/ in east bay close to SF, if you want to try the junk yard way. You can check online which Jeeps and years they have.

 

Pcm

I do not live in san fran . i just mentioned that i took a road trip there in the jeep. i live in LA county and yes there are pick and pulls out here. i have already visited two of them with no luck. Closest i found was 96 and the pcm was already gone. I tried the zip tye bandade method this morning and im scared to move the jeep now lol.

 

R5010381AB 1997 ZJ BODY 4.0L A4 CAL (NAE)

Your Jeep has California Emissions.

The vast majority of 4,0 97s had security. There is nothing in the part number that would designate the security configuration.

The original PCM is initialized with the security configuration the first time the vehicle is started. Once it is paired with security system, it can only be used in a vehicle with security. If your ZJ has security, your donor must also have security and vice versa.

 

Thank you



Well let me begin by thanking you. Your zip ty trick worked and i was able to make it to work today and the p0351 is gone. At this point i have already ordered a pcm from autozone and will install it in two days once it arrives. they have a one year warrenty so if it works then money well spent. My only concern is if the new pcm will act up with the security set up you mentioned. They did say its already programmed from the factory and there plug and play.

 

I have the same pcm number with the stalling issue, did the zip tie method and have not had any stalling since, that was about 1k miles ago. How do you tell if you have security system or not, I have a key FOB to unlock doors and when I lock the doors with the FOB it chirps, I didn't see anything on the factory build sheet that says it has security.

 

not sure how to answer your question if you try to open the doors without the alarm the horns begins beeping that to me as a security system

 

Lock your doors with the key fob, or just the power locks and close all doors. If you have a security light that blinks in your dash, you got securitized!

jwebfournow: sounds like you have aftermarket security. My 95 has never chirped on system arm or disarm.

 

I'm swapping my PCM as well.....I need some definitive clarification from folks. I'm hearing some say if your Jeep came with a security enabled PCM you need a matching one with security.....others are saying that the security systems imprint on the PCM and will only run on that specific vehicle so you need to get one without security. These are obviously completely different answers.....which one is correct?

 

the vin imprinting/matching does not apply to ZJs. the 98s have vin numbers programmed in the PCM and BCM, but i have seen several occasions of mismatched vins on this year model with no problems.

the way i understand it, when the PCM was new from the factory and the switch was turned on for the first time, the BCM (or security system?) embedded the security configuration into the unit. it is either with security or without. from that point on, that's what it is. when you get a reman PCM, it should be set back to receive the security configuration

i have seen several cases where a non security PCMs from JY were installed on ZJs with security and they would not run more than a few seconds.

if i have drawn the wrong conclusions someone please say so because i'm working off what i learned on the forum.

 

i have seen several cases where a non security PCMs from JY were installed on ZJs with security and they would not run more than a few seconds.

if i have drawn the wrong conclusions someone please say so because i'm working off what i learned on the forum.

That's incorrect, we took a non-security PCM out of the JY and put it in my buddy's '94 w/security and it runs just fine. The previous owner had replaced the PCM with one from a JY out of another ZJ with security and would only run for a few seconds.

The BCM only imprints code in the PCM if security is present. If there is no security present then the BCM doesn't imprint anything, meaning you can install a non-security PCM into a security equipped ZJ without issue. This is of course assuming the new PCM is good and the donor vehicle has a like drivetrain.

 

That's exactly what's happening to mine.....so Im assuming Im suppose to have security (red led light on dash but never blinks nor has it ever).......does that mean this is a no-security PCM I have? Is there a way to tell what its configured for via the serial numbers or any other reference on the case?

 

cant tell what it is from the label

the BCM controls the security light. the pcm just plays along

 

Does that mean I may have an issue with my BCM that's causing it to reject the new PCM but not the old?

-= 97 ZJ 4.0L I6 149k=-

 

.

 

the red led doesnt work. does the security system work when locked with key fob? horn chirp?

 

Not really......I don't even think the parking lights flash.....just locks doors

-= 97 ZJ 4.0L I6 149k=-

 

hmmm.....here's my next question then.....If my security enabled system is NOT working (alarm won't arm or go off for whatever reason) but my Jeep will run with my old damaged PCM but not with the new security enabled PCM......What should I do???

 

how long have you owned this vehicle?

the only thing i can think of that makes sense (to my feeble brain) is that at some point, the secutity system was disabled or failed and someone installed a non security PCM.

something to ponder upon.

 

That's the exact same conclusion Ive come to at this point.....I'm going to purchase a non-security enabled PCM and hope for the best......

I've heard that it will Marry itself to my security if its present anyhow if a non-security PCM is installed on a security enabled jeep.....is this true?

 

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I would have to assume that's correct because I've purchased more than one PCM for my 97 and not once was I asked about a security system.

 

This place is in San Diego... but might be of some help.

Hard Rock 4x4
920 Heritage Rd.
San Diego, CA 92154
http://www.jeep911.com
PH#(619)6618242
TOLL FREE 1 888-JEEP-911
OR 1 888 5337-911