A 2010 Jeep Patriot with a very difficult problem to find. Diagnosed using Automotive Test Solutions eSCOPE ELITE8 and the eSCAN ELITE. www.automotive... www.automotive...
Loved every minute Bernie, thanks for sharing. The industry is better off with each case study! Love that each video is getting incrementally deeper, requiring a better set of knowledge with each one. Each one building upon the last. Keep raising the bar for us!
Hello you are brill , when you get a problem and fix cars its a very satisfying, I'm 74 years old and I love to see how you problem solve , especially when other garage cannot fix
Bernie, your are a world treasure,for us.Unfortunately ,I have meet you, only from your videos 😪😪,I hope, one day, I meet you, and thank you personally, for the knowledge you are sharing with us.
I've seen and experienced bad grounds but this vehicle is something very different. He's right about aftermarket electronic and electrical parts. They're junk! Thank you Bernie for this enlightening video! Getting back to theory of operation, use of the scope and experience solved the problem. You are one in a million Bernie!
Great job! I've faced the same problem on 10-15 years old Hondas. As just as your ground wires got rusted - coils are going crazy and you have coils and cranck shaft sensor DTC. Non of them turn to be faulty, just rust and oxidation on ground wires. Love your way to search for malfunctions! Thank you for your wisdom and passion!
I absolutely love diagnosing faults. Especially when everyone else has struggled. Id would do anything to spend a week having Bernie teach me to be a master at reading scope data
I wish I could spend a week with this man, I love his connection with his scope and I love his enthusiasm still, I learn so much from him about the smallest details. I like that he is so grounded (excuse the pun especially after the video) and yet so so bright. I repeat myself every time but THANK YOU Bernie. And guess what guys ?????? Yep my Escope Elite is on its way to me 👊
I've been told several times by several people that you just can't put aftermarket crank sensors in Jeeps. I know a couple of shops besides just the dealer that specialize in Jeeps and they say that same thing. Chrysler grounds are just Chrysler grounds. We used Stabilant 22 on my Ram truck computer connections after it being suggested by a guy who specializes in Ram trucks. Napa and Advance Auto had it on the shelf but it's pricey. They also call it SL5 or CE1. Thanks for the video. I learn more from these type of videos than I ever did in school.
Can't use aftmkt. O2 sensors either... ....or coils .............or cmps ....................or anything electrical. I have even had pcm codes telling me that the wrong oil is in the engine! No lie!!! And what's really interesting is that Mopar is cheaper, yes cheaper than the top rated aftmkt. parts. And I use deoxit electrical enhancer. Good stuff.
I've had ton of issues using Aftermarket CKP & CMPs on Chrysler Vehicles. There's been a couple that due accept them but more often than not just go OE.
The production of these videos is why I buy ATS tools. The Snap-On “diag truck” came to my shop three times in one month to pick a fight with the “elite 4”. They failed, failed, failed to back their product up.
Best piece of chocolate from the box. I love it. Thank you for the encouragement. It is hard in this industry because there is lack of information but you share your technical information that helps with coming up with your own ideas to make sense out of the data.
The thing all these circuits have in common in any vehicle is the ground. The negative spikes exceed the PIV of and PN junction in the op amps or any others transistors in the circuits. My first guess when the scope displayed showed was ground.. so glad it turned out correct. Been out of electronics for a couple of decades. Great case study!
Great video! Just have a question. What was causing the spikes, the bad ground or coils? You replaced the 2 coils bot don’t remember in the video stating the coils were bad.
Thank you Bernie for your knowledge and experience that you share and contribute to those willing to learn. I look forward to each and every video you create.
Mastering on the highest level, high end oscilloscope , highest level of experience, problem getting worse when happening occasionally during driving under load and DTC is not set, or DTC pointing in wrong direction. Driving on passenger side with oscilloscope half day.. Top man!
Rut Rooo 😆 Always great case studies. Happy to see you at STX in class. And I was surprised to see one of my captures you helped me with made it into your book!!
@@scientist100 I took one of his training classes, its called the pressure is on. I believe you have to attend to receive it. I will say their web site has loads of information that is high quality and informative. Very in depth 👌
I have bought 2 of his books from his site, unbelievable, so much in depth,hi level books, you may not even find that much information, even if you buy 5 books.
The starting point with these problems : clean ALL grounds , use OEM parts . That alone would put you in a better place . Before I would use a third world white box part , I would put in OEM used . Great fix and lessons !
I get So Excited When You Upload a New Vid I Always Know it is Going to be Great You are the Best Thanks for Sharing So Looking Forward for the NEXT !!!
Hi Bernie, just curious, if it matters, it looked like those were only 2 wire coils. Where you back-probed in the power or control wire? Awesome video and always so much to learn!!!! Thank you!!!
Awesome case study. Just another example of why it’s important to have a good scope and to take a close look at input signals when facing a problem like this. In this case the computer is doing its best to lead the technician to the problem but without proper equipment and technique it will be looked right over. Bernie fixes another one!
Sir your explaination is very clear and easy to underatand,,can you make a video sir if you dont mind,a video of how the ecm interprets crankshaft and camshaft to synchronize timing and how ecm know from this sensors which cylinder misfiring.....thank you so much sir for sharing your knowledge..god bless you always
Great knowledge and video bernie. Ever since i got taught by Doug and John from tech help and learned about your videos i cant get enough! They couldnt talk enough great things about you and taught some things you showed them im glad ive got to learn from the best @Automotive test solutions
I'm very curious about the lean condition though, wouldn't a lean condition cause the coil to work harder therefore having a higher potential of this issue occurring?
An over voltage is may be even worser than a voltage dip in the 5V supply. The overvoltage could toast the circuit. Also the very strong current changes in each coil can cause "overtalk" to other wires in it's neighbourhood. The way to prevents this to shield these wires. So the way you wired it could also contribute to the changes dips and or peaks in the measured 5v supply.
I wish Bernie would have tested the vehicle after cleaning the grounds to see if that fixed the problem. Instead, he changed the crank sensor at the same time. Therefore, we don't know what the actual fix was. In other videos (ScannerDanner, SMA), they had similar crank signal issues and DTCs on Jeep Patriots. In both cases, replacing an aftermarket crank sensor with an OEM sensor fixed the problem.
Sir Bernie,,,,I am one of your subscribers watching here from Philippines, and I am a technician too,...I work as a electrical specialist and Drivability on GM cars in Saudi Arabia... sir can I ask something? Sorry sir I am not so bright that can easily catch up or interpret some of your deep strategic approach, but everytime you upload new video I'm very eager to watch because I know their's new learning from yours..I just want to ask sir how you know or how to interpret from the beginning as you see the wave form of crank. Sensor and theirs a glitch that it is came from ignition? How you know sir it is from igniton? Thats I am wondering how? Thank you so much sir you teach us you share us your knowledge. .God bless you always...👍
Great video Bernie learning lot from you thank you for posting these videos. Just like to say one more thing Chrysler and Chevys all ways have a ground issues.
Great DIAG!. I too Share your enthusiasm with the love of what you do to see and find something new, to me it's why I do what I do. I love what I do and It's my job! KUTGW
Love all your content, not too much of an automotive technician, I'm in diesel so I am curious as when you're saying ignition strike....what does that mean? Thanks 👍🏼
My jeep only had 14,000 miles on it before the coil failed and the altenator at the same time. There is no amp fuse between them. The coils get fried if your rpm is above 4k.
Having run into many Chrysler crank sensors over the years, and have been told that between the after market and OE there is some variations of degrees in the settings. I would have liked to seen the testing without changing parts, to me you take a methodical approach in finding the issue, but you change to many variables to prove the grounds were the main issue. I would have liked to seen the scope values with the coils and crank that were in when it came in. Just my two cents on the subject, you took a great approach in finding the failure, but then parts cannon the car before reviewing the scope.
Parts quality has gone downhill. 2 starters from worldpac, 2 from the dealer all had an issue. Had to yank the solenoid from 1 to put an another to get it to work right.
I was called to another garage to fix a 2005 300c chrysler. The problems they noticed with the car was Hard or no start, red lightning bolt flashing, no throttle response, headlight stays on, immediate stalling after starting and rough idle throughout idling as a result a new PCM was replaced with a new one however problem still persisted. I scanned for DTC codes and saw a P0340, P2167, P2166, P2115, P2116, p0603 and more module codes like C2202, U0168, U1414, B1A25, etc. Please , how do I fix these car problems?
What would happen if you where disconnected (unpluged) cylinder one coil and start the engine? Even though we had miss fire, on scope do you think the crank sensor ground line would be smoth (straight) ? Thanks I really love your videos i learn everyday new, you change my strategy, thank you so much, I really appreciate you. You are my model. I woul not forget you untill i use escop
