Jeep Grand Cherokee Failed PCM : FOLLOW UP
ฝัง
- เผยแพร่เมื่อ 30 ก.ย. 2024
- In a previous video I diagnosed this Jeep Grand Cherokee WJ as having a bad PCM. • Jeep Grand Cherokee: N... . The shop just got a used PCM and had me come back to get it working. We have to go into the SKIM module and do the PCM REPLACE Feature using the DRB III. -Enjoy!
If an SMA Video has helped you out please consider giving using "Patreon" to help support us. The videos take real time to create and pull us away from real work that pays our bills. CLICK HERE: / southmainauto
CHECK OUT OUR "SMA SWAG" STORE! Go on Teespring and get your very own SMA merch!
teespring.com/...
If you don't like Patreon feel free to use the "PayPal Me" link: www.paypal.me/...
The South Main Auto Amazon Store:
www.amazon.com...
AES Wave Automotive Diagnostic Tools: www.aeswave.co...
Thank you for all the continuing support!
--Eric & Vanessa O.
Feel like sending some swag to SMA because you love the videos but don't know where to send it?
Just ship it here:
South Main Auto Repair
47 S. Main St
PO Box 471
Avoca, NY 14809
Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained. - ยานยนต์และพาหนะ
Do a vid where you make the wrong call.. cause ya know, if you can do it, we can do it
So his Jeep was parked at your shop for what 3 weeks free of charge! Man your a nice guy it would be at least $2.00 a day at any shop around we’re I’m from Denver Colorado.
Thanks Eric. Always a pleasure to hang out.
Why not put the damn ECM up under the dash, or like my old Honda, near the passenger kick panel?
New Mercedes have 90 computers that talk to each other, can't wait to see how those fare after driving in the salty northeast.
I wonder what the vehicle history looks like. Board corrosion nearly always happens with exposure to humidity. I have often wondered if putting the ECM into a bag with desiccant pouches could help protect against this problem in coastal areas....
the case is supposed to be sealed fairly tight and not let water in. corrosion of the cheap metal went right underneath and past the sealant allowing water in and game over.
That model PCM looks like a later jtec style model. Corrosion yes, but looks repairable by any hardcore tech. I've seen quite a few PCMs and that one didn't look potted like the Chrysler/Dodge/Jeep ones I've seen but it did look like it had a conformal coating on it. Wonder why that one wasn't potted.
“If you can do it, I would like to think I could do it, but don’t have the vast knowledge that you do!” However, I do have a good excuse to buy more tools!
Computer way of the future huh till they come across water.
Great follow up
I am surprised manufacturers don't pot these boards. Of course the number of connections they need probably cancels out any benefit potting would provide. And perhaps heat build up. Ok. I've talked myself out of potting the PCM.
Some do !!!!!!!. But the best parctice IHMO is putting the ECM and other related modules INSIDE the body (cabin) like many japanesse. ECM is behind the glowbox. Cabin is more temperature and humidity controlled and unlikely to receive splash, salt, coolant, etc etc etc that modules on the engine bay are more exposed to.
Been having issues with a 08 Altima v6 Step Motor in Valve assembly. Can’t buy them at Nissan so I got one online still same issue. You ever come across that on the CVT 3.5?
Did you confer with scotty kilmer on you findings?? Lol
Sure... Conference room is in the trunk..... Bring your own coffee and donuts.
Fuel pressure regulator
So you just reprogrammed the old skim to the new pcm? If so, what were the 4 numbers you entered?
Thanks for the follow up. Enjoy seeing the successful completion of your hard work.
Gotta love green crusties....
Do you hire/rent older manufacturer diagnosis tools? I can't have them all, I guess it's safer to use those original tools. I just can't stand how they all go custom and not have standard initialize/virginize functionality build in, a car theft might just "raise" the Car up or come with specialized hardware anyways :-/
I have a 01 jeep grand Cherokee Laredo. 4.0 inline 6 3 speed with overdrive transmission. Dealership has had it almost a year I get the vehicle back about ever month drive it 60 miles an the overdrive goes out every time. I've spent 9 grand. New wheel speed sensors new transmission new transfer case. Transmission cooler also. They have put 4 brand new transmissions in it 2 rebuilt transfer case an 2 new transfer case. I've replaced about everything. What in the fuck is wrong with it. Anyone know ???
A car has never been a safe space for electronics. And that board is naaaaaaaaaasty.
I remember fixing a shitload of GM flex boards on clusters back in the day! Those shitty things were in every GM vehicle from like 77 to what, 90 maybe? Ugh I hate soldering on traces, flex traces were infinitely worse. 😞
The logical place for ECM"s would be behind the dash maybe behind the touch screens.
@@robc8468 Yep. Remember when they'd just stick em anywhere? With no protection? My fave was Chrysler. Put the fuckin thing in the AIR CLEANER HOUSING. Okay, ON the housing, but damn. Heat, cold and vibration! Ugh.....
@@robc8468 My all time favorite: our 94 VW Golf (long dead) - ECM in rain tray below the windshield.
Dealers should get the electronica computer crap out of cars. Completely unnecessary, and only makes things more difficult to repair in the long run. I have seen a lot of your videos will you get rather in depth when it comes to tracing down computer related problems in cars. All that junk is completely unnecessary to have an a vehicle. Cars from the 60s ran just fine without any computers in them whatsoever. In fact, I believe they actually ran better.
Eric,
Thank you for the follow up! You would think that the manufacturers would learn to put the PCMs in a location where they are less susceptable to attack from the elements.
SMA#1
God bless
Paul
I have an 01 Grand Cherokee. All the gauges died and every light came on in the cluster. Disconnected battery, pulled the cluster, cleaned the plug(didn’t help) Now it won’t run due to the P1686 no buss from SKIM.....I’m leaning towards a new ECM. Any thoughts?
My WJ has a P0601, looks like there's some green puss by that Intel flash memory chip on the ecm in the video, wonder if that's what mine looks like. Thanks!
Nice, thanks for the followup. It's been awhile since i've seen a DRB 3, that one looks nice for it's age. Funny that this popped up, i'm trying to program an additional rke fob on my sister in law's 01Grand Cherokee. No luck so far. I'm going to have to find someone with a functional DRB 3 to get it done. Also, found out that instead of the rke functions being in the vtss module, it's in the pdm. Weird place for that.
Another correct diagnosis by Dr. O.
Hey I have same Jeep and my ecm board has a solid thick silicone over it. Anyway can’t get that key symbol off. Jeep won’t crank
Eric....I hope these Videos are not cutting into deer hunting time...our firearm season opened up in Illinois today. Figured you would be out hunting..
That was very cool and good diagnosis. The shop i worked at only the OTC Genesis not really sure if it was capable of doing that stuff plus it wouldn't install customers parts.
Nice job Dr. O
Where did you get the DRB III Kinda like when you do some service calls. Keith is probably sweating bullets hoping you don't work your way to Staten Island. 😆
from the looks of it, they need about 100 more guys in staten island..
@@throttlebottle5906 exactly
You can get a DRB III on ebay but be prepared to pay for it.
@@snoopdogie187 thanks. I'd like to get the factory one too. I think it's called win
DRB III is factory for Chrysler. Its just older factory tool, meant for non CAN cars.
www.oemtools.com/homeproducts/chrysler.html
Ivan would've fixed that PCM with new parts and WD-40. :-)
If you don't mind me asking where could I find or buy one of those scanners for programmers that you got that you're the one that you using on the jeep thank you
chrysler "moving through" .... (to the junkyard)
Just replaced the PCM in the kids 97 Jeep GC …. runs great...
Aloha from Hawaii, I really enjoy all your videos, your videos have been a big help to me, Mahalo.
Shayne
Which autel scanner model can handle theses same options that you'd need obd3?
That DRB looks ancient. It did the job. Interesting looking at what rust does to them circuit boards. Nice job Eric.👍
it is ancient. This tool was used on OBD 1 and the start of OBD 2 vehicles. It is around 2 decades old.
The real issue is that the car is ancient !!!!!!
I'm driving a 95 Jeep Grand Cherokee, so the Jeep in this video is relatively young.
Was hoping to swing by while I was up in the area, but you were closed. Did someone wreck and take out the power in town?
Yeah the plow guy bumped the pole behind the shop and took out 2 of them. No power or phone until 5pm today... DAY OFF FOR ME!!
South Main Auto Repair LLC Dang! I was hoping to meet the man, the myth, the legend Eric O. I came up to see Gary at Krown of Stanley to coat my car and figured I’d stop by. I’ll just have to make another trip up lol.
@@SouthMainAuto Bumped and took out 2 poles? Are you just bein nice? 😂
I wonder if you can claim against the insurance for loss of business?
@@SouthMainAutoGo full Amish and use lanterns and wood stoves for heat. Steam engine for the air compressors.
No Mrs. O? Dissappoint! Thanks for wrapping this up for us... really cool to see inside the brainbox and look at the damage.
another successful heart transplant by DR.O
Mrs. O didn't hassle you in this. How disapointing. ha ha
is the device you are using regulated by government?
I love all the Chrysler product videos you've done. You've convinced me I never want to buy anything by them. It would have been simple for them to have sealed up that ECU module or maybe engineered it so it was mounted in the cabin. They're trying to sell this as an off-road utility vehicle.
Wow carlson, throwing more shade on Chrysler for a 17 YEAR OLD Grand Cherokee lasting almost two decades in rust belt heavy salt upstate New York! What are you driving that could go that long in that environment and last that long and will probably go 25 years with that repair????
Give me a break! Jeep is the American equivalent of an English Land Rover with it's concomitant reliability construction issues. If you want a reliable 4WD utility vehicle to drive for 17 years in crappy conditions get a Toyota LandCruiser.
@@rfcarlson1.... Yeah I thought you were probably a virtue signaling shill for Toyota. I owned two Jeeps one Older Cherokee and now a Grand Cherokee both were/are fine. I see plenty of 20-25 year old Jeeps still on the road surviving the harsh Michigan winters.
Actually I drive Jaguars. They depreciate 50+% in the first 3 years. Buy one for about the same price as a new Honda, drive it 10 years and give it to charity. Parts are reasonable when you figure out the Ford part numbers they cross to. Toyota LandCruisers are way too much money for me because of the bullet-proof reputation they have. They take forever to depreciate to earthly prices.
@@rfcarlson1 Would you like to make a claim that Jag's are more reliable than Jeeps?
Thats awesome you have a DRB3 wish I did as its still a useful tool on the older models.
Did I see a Vacuum Tube Socket on that board? It looks like there should have been a couple on there. Nice to see a quick follow-up on a job like this.
17 years is a lifetime in electronics......Take a look at a 17 year old cell phone or CRT based computer.
DRB III goodness!
Could the OTC Evolve do this procedure as well??
Those DRB scan tools seem to have quite the obnoxious fan noise. Have to wonder how the engineers that designed it could stand to have the thing on and making that noise all the time.
perhaps they should have made it the size of a large trunk, then it could have been nearly silent...
Did he silicone it or attempt to seal it from the exterior at all, just to help prevent a future failure? Just curious. It's a shame it's the corrosion that takes it out...
Not really sure Cuba, he had it when I got there so I just hopped in the driver seat did my thing and hit the road... oh after I got paid ;)
@@SouthMainAuto oh well. Getting paid and shipping it out is great. It was out of your hands!
Is that a Chrysler factory scanner you're using
@@jeremyanthony9300 yes, that would be a factory scanner.... older one. It's the only way you can program Chrysler PCMs
Dielectric grease and a can of spray leak seal.
👈😀👉
Perhaps this brings PCM month to a close? lol Thanks Dr. O!
Gosh I hope so haha, it is now tire month :(
@@SouthMainAuto Yeah, Mrs. O made that perfectly clear the other day.
HA DRB sweet. Almost bought one when I had both the XJ and MJ. Actually just bought cartridges for my MT-2500 to see what I can do with the new 94' Nissan Hardbody project/fun.
Disappoint. No Brake Clean.
Hi Eric, I'm wondering if the coding of the skeem and ecm could be done with Launch products? Do their products have this capability?.
Not all of us have the convenience of having the proper scan tool to program PCM's,Skim modules, keys ect.and are at the mercy of those who do including dealers. As I stated in the previous video my WJ went back to the dealer AFTER it was misdiagnosed and parts thrown at it by a trusted repair shop. Do the research folks,the South Main Auto channel is a good resource for just that. Also as I stated before WJ's are prone for shorts to the electrical system so check all ground connections to the frame and engine. I also checked my new PCM that was installed from Chrysler and it does have a rubber seal showing around the edge of the PCM so Chrysler is aware of the problem and doing something about it.
Thanks for the follow up.
'I can do it, you can do it'? Some ones been watching Naomi Wu, AKA sexy cyborg. Time well spent, a very smart lady.
Great Follow up Video..
Excellent work, as always.
Recently discovered channel and have been binge watching. Didn't know how much I didn't know. Thanks for all your videos! Great content, commentary, and humor. Even my wife has been watching and she's not at all into cars.
Thanks for the video.
Howdy from Texas 😎
Thanks for the follow up.
Thx, you da best!
He went full Ivan on the PCM! Never go full Ivan on the PCM.. (unless you're Ivan)
Wow nice follow up. Glad to see the "new" PCM worked out, though probably not as glad as the owner.
Computer stuff is great until it's not. Thanks Eric for the follow up and confirmation.
1-2 BBQ... good job
Great follow up Eric o
Great job again
Good job as always! Yes I remember, I watch all your videos. 🙌☺️
What about your Jeep rock crawler ?
That's where the guy stole his replacement PCM from ;)
Eric you are my GURU. Adopt me, please! ;)
Thanks Brother O. Been binge watching 2 yrs of vids
Great video
Wham bam thank you maam!
Sorry to bother you, but I just have a quick unrelated question. Would an incorrect BARO reading affect the A/F ratio in my car? It reads the atmospheric pressure at 9.5 inHg, which is obviously incorrect, and has a system too lean code with over 20% fuel trim at idle and under load. When the engine is off, I made sure that the ECM is receiving 5 volts from the MAP, and this vehicle doesn't have a MAF either. Any help on this would be great, thanks! Keep up the awesome work!
Seems quite possible to me. That barometric pressure doesn't make any sense unless you are driving at the summit of Mount Everest..
I'm no expert. Just an amateur. Take this for what it's worth:
This what what the sensor is for. It provides information about air density. ECM needs this information to provide proper fuel to air ratio supplied to the engine. It may only be noticeable on a warmed up engine but can be vehicle specific.
Eric can probably tell you the specifics regarding your vehicle. I'm sure he gets a lot of similar questions and simply can't reply to all of them.
@@RobertHancock1 Yeah exactly, and obviously, the higher you are, the less dense the air is, and thus, it thinks it needs less fuel to maintain it's ratio. That's how I'm seeing the situation.
@@andrewevanoff1192 The barometric pressure is usually set to the ECM at the factory, something around 29 inHg, and the MAP sensor will report any changes in that pressure. So I'm confused why it would be reading 9.5, other than the possibility that it wasn't programmed correctly in the first place. Also, when the car is running, it reads 3.5 inHg
I'll assume it has both a BARO(BAP) and MAP sensor, surprised it's not spitting codes and idiot lights lol..
and yes, it uses both signals to adjust timing and fuel trims. is there an issue with the air cleaner/intake before the throttle plate? something like a soaked/wet/clogged air filter and plugged drain hole on housing or rags, debris, rodents blocking it..
Word up!
Cool vid..
When Louis Rossmann is starting to fix car ecus?
THANKS FOR THE VIDS PLEASE KEEP THEM COMING .
cool
Yo
Yo
Thanks for the follow up! Great as always!
Tell Mrs. O and Hannah hello!
Thanks Eric
WHY does the ECM use a plastic membrane instead of a proper printed circuit board?
Is this Chrysler being "special" again?
plastic membrane? it is a pcb with parts on it, and a coating to seal and keep vibration from making parts fall off. the coating is more or less an clear epoxy/resin. the board edges are not sealed tight and I'm sure it's multilayer so plenty of ways for water to get in.
anyway the main issue is the "whizz-poor" chinesium pot-metal case leaking water in, which happens after it corrodes under and past the sealant where the case halves are assembled
@@throttlebottle5906 Look at the edge of the substrate at 2:55, that is clearly not a fiberglass PCB. Looks like the sort of stuff you always find on the back of an instrument cluster.
maybe it is thin film, if so, it must be for easy heat transfer to the chinesium metal which corrodes like the devil, I used to repair some of the older ecm's but haven't bothered trying any of the obdII and later devices, many are potted or impossible to find the parts for, even the old ones you had to reverse engineer to find a component that would work, due to custom labeled parts. now it's mostly larger chips with multiple functions or programmable nightmares =p
It is delaminating I think.
he's right, I yanked the cover on a unknown/bad crapsler/dodgey/jheap around the same era and it was infact just filmed copper crapola. lol
it just looked like de-laminating/thicker substrate in the video...
First for a first 🐵