How to tell if your car computer bad. No response from PCM TCM.Jeep Dodge Chrysler U0100 P0601 P0606
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- เผยแพร่เมื่อ 26 ต.ค. 2021
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Watch Part 2 on WHAT CAUSED THIS here: th-cam.com/video/gkmFerS6bnc/w-d-xo.html
Be sure and watch PART 3 here: th-cam.com/video/Z7zj4v8Eoag/w-d-xo.html
what software do you use to diagnose
@@nixonteng4231 witech
thank you ,do I buy the software or download?
@@nixonteng4231 Hey bud, you cant buy or download this program unless you had a subscription with FCA. Thats dealer type stuff
If you have fuses popping everytime you plug it in, once you plug the ECM in that means you have a short somewhere in the wiring harness, do yourself a visual inspection before assuming your PCM is bad. Also test your power, ground and signal on your PCM wiring harness to see if everything is good, if not then that will tell you if things are bad as well.
Thanks! You are the first true mechanic I've ever seen heard or met who knows exactly what they're saying and doing. I thought I was the only one! You are awesome! Keep up the amazing work you're doing!
Life saver. I got an 09 300c running into the same problem glad I found your video before going to a shop
That was perhaps one of the best JT videos I've seen yet. Awesome explanation even for non mechanics. Great teaching JT!
Thanks for watching bud
JT, you are one helluva good mechanic. The way you got to the real problem shows how well you go about diagnosing the problem. Great video!
Great video very informative. The only item I might add is instead of blowing all those fuses you can use a volt meter, using neg on one end of the fuse circuit and the positive on the other side when you plug in the pcm you will get a voltage reading. If the circuit is not shorted than it will remain a zero value. Just saving a couple of penny’s and not having the fuse you need at the time because you used all your inventory
lol thanks for the time to upload
Awesome detail JT! I've always been steered away from electrical work, and well, I don't have a choice but to learn it now working at Toyota. Definitely helps me out. Thanks man 🤙
Thanks for watching bud. lol, its not that bad. You just need a fresh brain and it has to make sense..Stay at it man
The more you do, the better you will get Billy!
thanks for the knowledge big dawq appreciate you ,🙏🏽🙏🏽👊🏽👊🏽
you’re empowering homies from the hood like myself hungry to learn a new craft in order to stay in the rigth path and strive for greatness big dawq ,salut 👊🏽💯
Thanks for tuning in John
Great job. Good mechanics have good logic!
great job sir. i absolutely love how you break the diags down. you seem to be an electrical genius. I've watched several of your videos and subbed your channel. i am a mechanic for over 40 yrs and have never been strong with 12 volt/car computer systems, I've always referred these types of problems to my buddy that has more knowledge about these than myself. sadly he retired and moved across the country. it just so happened that my 1999 300M that is near and dear to my heart as it was my mothers, {its been garage kept in Arizona and has very low miles} developed a no crank and no com with PCM when i put my scanner on it. i do know the starter is good. fuses and relays are good. I'm 99% sure the TIPM is good. what leads me to believe the PCM is bad is that when the ignition is switched on the PCM emits a high frequency sound like a ringing in the ears sound. almost like electronics frying, and when i wiggle the PCM a bit the pitch changes, what do you think the chances are the PCM has fried? I've been doing my damdest to research this and reading the schematics and everything points to the PCM. I'm the kind of guy that very rarely asks for help. my buddy tried helping me long distance but its hard to diag from afar. any input would greatly appreciated. thanks for the vids.
... That whining electrical noise that you're describing could be bad capacitors.
Have you had a phones USB charger plug go bad? Sometimes you'll hear that same kind of high-pitched whining noise from those devices. So if it's the same kind of noise ... I'd be suspicious of capacitors.
I'm sorry I can't help more than that, I'm dealing with my own Mazda PCM intermittent no crank issues... And of course it has to be remote. Ugh.
Good luck
Spark flash showed up in the video J.T., wow! Nice logic to find issue.
Mate, you are a genius. I feel like I just got a free training session!
This IS A Very Valuable Training! Thanks JT!
JT you rock man. By process of elimination you figured it out.
Excellent mechanic get straight too the real problem
A big Thank you!! Awesome job.
What's up J.T.
I have an 08 g. caravan 3.8 that's 62te is seriously screwing with me. Its got about 140,000 miles on it. There's a lot to write to get you the related history on current problem, (main problem us that it only drives on 3rd gear, generating a P0731 1st gear ratio error). After cruising TH-cam for guidance for the last 10-12 weeks I am most impressed with your knowledge, your channel, and your consistent ability to keep it short and sweet. I've subscribed and hope you might be able to help me out.
Hey Paul theres really no good news when it come to the speed error codes like that P0731. The problem likely internal because that TCM have away to test the sensor first. Thats an error in 1st gear. Theres an underdrive clutch applied and a low reverse holding clutch activated in 1st gear. Problems ive seen with those are the seals inside the input clutch assembly. The trans will likely have to come out for either repair or replacement.
Wow thank you so much man I can't find anything like this for my 05 300c this was unreal I watched all 3 I think I have a pcm failure but I'm not sure need to get it in the shop I guess I have u100 from time to time I suspect the harness aswell
Good work JT
Thanks for watching Josh
Service information can be your best friend! The fundamentals.
Great problem solving!
JT on Friday May 20 2022 I got the check engine light and lightning bolt with OBD code P0123. Saturday morning lightning bolt went away. I have a 07 Chrysler 300 2.7 it's my daily work 🐎. Thanks
Excellent video. Thanks for sharing your diagnostic technique. Cool breakout box.
Don’t forget the 5 volt reference as a communication check. Now if I suspect a pcm shorted I unplug it use a terminal adapter go from harness to pcm pin on powers and grounds/data lines only
Good point bud. I had to get PCM back to the point where its communicating again. Without the 12 volts at pin 10 and 29, thats never going to happen
Best video ever👍🏻👍🏻👍🏻
Thanks for watching bud. Preshate that.
Great video brother!!!! I had a car with this same code I struggled so bad trying to figure it out. Smart man forsure
Thanks for watching bud.
Thank you guy!
Excellent video
Thanks for watching bud
Not necessarily a PCM. Had the same issue and that relay you talking about feeds the fuel pump and the fuel pump had a short I was also ready to call a PCM but after removing the relay the fuse did not pop anymore so I turned to the fuel pump and found the fuel pump wire positive shorted to the frame by the fuel tank. Always go that extra mile and the relay was right in front of that fuse. Wonder what was your outcome? Was it the pcm or something else.
Hi,
Which Software do you use for Electrical diagrams?
Seeing that in this post you're working on a 5.7 hemi I got an 06 Jeep Grand Cherokee and currently I've been getting an alert on the dash saying that the transmission is over tempature, I had a mechanic check it out and he came to the conclusion that the water pump had problems it was replaced for a few hours it was ok the alert didn't pop again till the next day. In my research on the TH-cam rabbit hole it could be either be the computer or a sensor/sensors what do you recommend I check first and how much do you think it would cost to get it fixed?
I got a issue with my Chrysler 300s 2014 im stuck as the car will not shift into any other gear. the shifter feels fine when shifting, but the transmission never shifts and the light stays on P. No other issues or symtoms were experienced engine turns over but gears don’t Engage could you tell me what it could be?
Thanks for the video and instruction, I have a U0100 PCM/ECM communication problem with TCM going to start with looking for grounding issue first, then check the pins at the connection. I do have an intermittent start and shut off at least two times and then it starts and stays on
Loved the video. Wish you were in the Harrisburg area cause I need your help. I've got an 07' grand Cherokee. While driving it sometimes will jump out of gear then goes right back into gear. It's throwing a p0884 code. I replaced the pcm but it still does it. Trying to avoid going to the dealer but my local guys can't seem to figure it out. Was hoping you have some insight to my problem. Thanks
DOES NOT THE POWER ENTER THE COMPUTER AND GO OUT ON THE OTHER 2 HARNESS? I HAD A SAME ISSUE WITH A USED BMW.... I GOT IT AS A THEFT RECOVERY AND PUT IN A AFTER MARKET RADIO AND PINCHED/GROUNDED A WIRE IN THE HARNESS
Great video were did you get the breakout box
Make sure the relay for that circuit is not shorted which normally wont happen but if not you have to be correct because nothing else is on that circuit but the relay.
The short must be internal.
Yes, that ASD could have very well been responsible or what ever that relay feeds could have been responsible for that short circuit.
My question is does it ever start even with blown fuse? Cus i got no crank, no start ,no bus ,but i let van kool down after driving and then starts up again , procedure repeats.
JT, excellent job. What software are you using for diagnosing? Thanks
What Software are you using on your Computer? Or what website are you on to get the information on the vehicle?
Good call.
Stay tune, Part 2 crazy
I need that website that you are using to diagnose....and does it work with any OBD2?
GOOD STRATEGY. BUT IF IT'S THE PCM WHY WASN'T THE FUSE POPPING BEFORE? U PUT THE FUSE IN IT DIDN'T POP UNTIL U PUT THE 3RD RIGHT RELAY IN. COULD IT HAD BEEN JUST THE RIGHT RELAY? GOOD WORK! 👏
Can anybody share what software he is using or what website he is using to get those official diagrams, schematics, in part locations? I think having access to that data would be incredibly and I'm not sure how to obtain it?
Thanks!
Hey man, where do work at? I have a similar problem but in my car. They already replace the hardness but now there is more to get replaced. Now they are saying it’s the PCM
Damn i wish u were in my area im going throgh the same situation right now!!! What u reckon a pcm& labor will cost for an 05 dodge Durango?
what software are you using please?
Man we’re are you located I need help cuz I’m having the same problem. I got new ecm my car started wen I tried hitting the gas nothing Bt car was still running then turn it off it won’t come back on
I have 2005 dodge magnum rt
Could it be an output for the pcm? Had a pt cruiser blow the pcm fuse turned out it was a shorted alternator wire on the axle
Good point, but the short was not triggered by simple plugging in the PCM. In your case, the fuse did its job by protecting the PCM
Dude, where are you located? I can't get my 300 to run. It starts with the remote but when I push the button it cuts off. When I try to start it it runs for a sec then cut off and throws code B1A8A.
What software, obd2 stuff are you using to do all this?
2013 dodge journey car was sitting for about 2 months, jump start the battery, woke up this morning car didn't want to start, when if finally started check engine light came on with p0606, I'm think battery
Nice
Thanks for watching bud
Where can I get one of those breakout box that you’re using in video
That breakout box can be a lifesaver and I think that Charger is the same generation as mine. Another thing to add to the list of tools I'd like to have. If the fuse keeps blowing something is shorted. If you have a pcm for that car maybe you can pop it in to double check. I'd be hitting closest yard with a Charger RT like mine it that happened to mine seeing how I can't afford the dealer rates.
lol, IKR. Go figure, I had no spare controller for this model. But the new PCM showed up, and guess what happened...Part 2 Coming up
JOhroyp
Wow one idiot in my area said my car needed a new engine. Well I'm hard headed a little and had it towed to another who couldn't fix it. The 3rd mechanic is the man. He replaced my ecm he called it ignition control module and it took him awhile to go over car and take time to look into mine cause he is real busy but he put em in and no problems not it's been 3+ years. I put a vacume gadge on car and it's got all normal engine readings. Some will rip people off around this area but I'm learning a lot. I'm only used to old school cars like my last car was a 77 Buick Electra with no ecm or injectors. It had hei ignition. A great car.
Would a pcm thats going bad make gage cluster to go crazy (turning off and on) and showing all types of u codes (u0402 and so on) electric power steering locking up… but radio is working fine
Could be a cable or wire slice in touch in the body of the car
You are a great mechanic. A little mean to fuses. But you can't make an omelet without breaking eggs. You should have plugged the C1 in and then installed the fuse. It would have still blown but at least we would have known it wasn't from plugging it in.
Where did you get that breakout box from?
What site are you using to see the where the fuses and stuff go
What website are you on...to see this online
What system is that your using on the computer
Anyone recommends where i can buy a PCM Programmed plug and play 2015 dodge Durango limited. I can get it to start but turns off immediately. i have checked all fuses and still gives me error code.Thanks in advance
I’m having a no crank no start no sound on my 2014 Chrysler 200 pentastar with smoke coming from hood during last crank what could it be J.T.?
O my friend, you would def need a pro scanner to diag no crank no starts. You have to be able to see PCM data input
Great video Jt. Could it be a bad ground somewhere.
Bad ground as in loose ground? That will likely not cause the hard short. I did however find out why, stay tuned for Part 2
2008 Dodge Charger randomly shuts off, won`t start until it`s jumped. In all cases battery is fully charged.
Turn the car on and off it starts, but at anytime it shuts off.
Could it be the PCM? One video shows don`t buy Mopar.
Hey bud you shouldnt guess at something expensive as a PCM. This year model Charger has several modules on it that should be properly diagnosed using a real good scan tool
I have a similar issue with a 2006 Chrysler 300 5.7L. It sat for 2 years, a friend gave it to me. Everything you checked in this video, I checked on mine. You knocked off a few problems i had. Thanks for that…but the OBD2 is reading “not communicating with TCM.” If i drive it, it wont go over 30MPH/ not switching gears. What am i missing? You said that the PCM and TCM need a reliable power source, ground, and CAN BUS. I replaced the battery, alternator, blown fuses, CAN BUS seem to be operating fine.
If you not going over 30mph then yes you in limp in. By any chance do you know if your car equipped with the Nag 1 transmission? Also are you subscribed to the channel?
@@OnlineMechanicTips yes sir, I have the Nag1 and I’m subscribed. I’ll take free knowledge every time.
Couldn't you take out your old PCM and have the same thing done without having to purchase a new one?
Will you please tell me what diagnostic system or tools you are using? Thank you so much.
did u ever get a reply
Informative video but, not to many of us have these fancy tools 😔
Where we can find fuse box please
Okay I have one for you, 2011 4.7 L Ram 1500 4x4 SLT. It had a blown head gasket so I went to the proper procedure complete breakdown on the top end did the head gasket new timing chains the whole nine, the timing is correct no fuses or relays or blown or bad not even any bad Jay fuses no shorts to grounds everything is connected it gets fire it gets fuel and it has compression but it will not start, it cranks but it will not start. what you got?
Because frankly I'm tired of this f****** truck it started at the drop of a dime before I replace the head gasket everything has been reassembled and triple checked properly everything checks out it just will not start
I think I shorted my pcm from trying to wire in a radiator fan 'kill' switch in my jeep haha DOH!
What scan tool/program are you using? I have a few hundred dollar one that only reads codes...... I need one that hooks up to my computer.
This was a dealer set up bud..Thanks for watching
@@OnlineMechanicTips I figured that. Lol. We can't have people fixing it themselves...
@@billyray6913 lol, naw man, its bigger than that. When you do that it tampers with emissions, this could be a legal issue and lawsuits would be flying from those that screw there own car up.
Damn man after seeing this video i miss being at the dealership. Even though i got screwed over ma y times.
lol, it gets crazy at times and rewarding at other times. Thanks for watching bud
I have a 2020 392 I used my scan tool
It said U0100 lost communication with ecu/pcm so I cleared the code now check engline light is on?
So what is the code now since you cleared it?
@@OnlineMechanicTips that’s the thing no codes popping up now just check engine light
The power port fuse provides power to the pcm
Do they make a breakout box that's universal or are they brand specific?
The DLC after 96 all standard now
Hey bro can you send link for breakout box and the software for from you laptop?
Curious what you working on and problem? Also are you subscribed to the channel?
My 2012 crysler 300 has a problem where the battery drains and I replaced the alternator brand new and replaced the battery brand new and it would die couldn’t drive it for long untill it eventually died
Did you have any codes in the PCM? Also are you subscribed to the channel?
GENTLEMEN, THE 6.2 AND 6.4 HEMIS USE 0W/40. 5.7 USES 5W/20. WHY THE DIFFERENCE? ANOTHER CAUSE OF LIFTER FAILURE?
looking to buy used car computer can you test to see if the computer works while it is not hooked up to the car
No, you limited to the visual condition of it only.
@@OnlineMechanicTips thank you seen a sniff test to see any burt computer parts indicate problems
Hey nice vid man my charger is doing the same thing no crank no start it’s rejecting key programs also
Everything on the inside to the outside works lights,ac,radio,horn whole 9 yards turns key to starting position…nothing totally quiet !!
Did you ever find the fix?
Where is body control module on this car
I have a 2010 Dodge Challenger not changing speed just on gear i plugged my Obd scanner tool the fault code I get is lost communication with tcm and oxygen sensors
Did you ever get it fixed i have same problem with my challenger
Did u get it fixed? What was it? Thanks in advance
Where are you located?
Hey man i have a 2012 Charger and is saying “Lost communication with the ECU/PCM A” Code “U0100” is there any way i can contact you and I can send you the car to your shop? I can give you more details about the car when i contact you as well
It starts to the run position but it doesn’t crank at all
I have a 05 Chrysler 300 v6 I have a bunch of codes and o2 sensor and engine light is on. I replaced sensors but I tried to reset the codes but the codes and engine light won’t clear at all. The car runs and drives fine.
Engine light never goes away even though I cleared the codes. Wondering why
I’m subscribed to your channel. I was hoping your shop is in Atlanta cause I need help.
Hey bud, there are times when the drivers inside the controller (pcm) simply fail. When this happen, those codes will stay active at all time.If you are 100% certain theres no wiring short to thos O2 sensors or if youve load tested the circuit and its ok, you simply have a shorted controller. If you looking at scan tool data, and you unplug the O2 sensor in question and the volt/value do not change, then yes the drivers shorted. The good news is that they now sell pre programmed controllers
Thanks for the info
Can you recommend where to get pcm or do I have to get it from the dealership?
@@derekmahone3169 I have no idea my friend where people are getting controllers from.
Was your location. My mechanic can't fix my jeep buddy I need you 😮
i have the same problem with my dodge durango 5.7 hemi
Me too
If it's your car, would you go and pick one up at your pull it place >>
Yes, if I was sure I would have found a test PCM to further check it. But this one was obvious. Thanks for watching bud
anything the pcm operates can pop that fuse
True, but im sure that anything you referring to also protected by a fuse. So if its shorted, that short should have never made it to the pcm. The PCM heavily protected from loaded devices except in this case apparently. Watch part 2 to see what I mean. Its crazy and seems un-explainable.
What software is that on your laptop?
Hey bud, that subscription app based, you cant buy that.
I don't get it why not
What the scanner you use.?
Its not a scanner
You may have an air leak and you may think is a bad pcm, inspect air intake hose, seals or egr
A vacuum leak likely will not pop the fuse that feeds the pcm my guy.
@@OnlineMechanicTips i had air leak and my chrysler was just driving me crazy , i replaced so many parts and still having trouble, fixed the air leak now car runs great
@@bostonianop1716 O cool, thats whats up bud. Glad you got er going.
i recently bought a 2014 chrysler i have power when i push brake + press start button nothing no crank no start nothing throwing 22 codes
What is the main code in the PCM? Also are you subscribed to the channel?
What state are you in am I able to contact you pls
What is the problem you having my friend?, and are you even subscribed to the channel?
Hoping I could get your opinion on this issue we are dealing with.
2006 dodge magnum 5.7 r/t,
Battery is draining immediately when I jump start it. Those fuses that you checked #16-14 have no power until I connect the jumper box to it and vehicle is running. P0622 code. New battery and alternator.
what was the problem please i have the same problem
@@ewertonchallenger we had a bad NEW alternator.
There are three grounds you checked 2 grounds a18 & a19 but there was three grounds a9 you didn't check a9 ground
Got a video of what I did 06 dodge charger rt 185k mile poped codes p0700 and u0100 all I did was check fuses in box by that I mean pulled yellow ones and pushed down relays also wiggled wire on back of pcm car idled for 30 min then made two passes up driveway try this before buying a pcm your welcome
wheres the video, because this makes no sense?
Crazy as it seems it's true dunno how but my car is running after throwing the codes
@@kalvingatlin3242 thats called a coincidence my dude. But I hope it works out for you.
@@OnlineMechanicTips that's why I said try before you buy?
Mine never popped the fuse described in video