Care Bears & My Pony rainbow T-Shirt would have quite an impression as well. Very respectable as we don't see men dressing up these days more of the unkept pubic hair beard dirty hippy tats all over look is common.
I'm not an auto electrical diagnostic technician but i am an electronic technician turned marine electrician - seeking to enter the automotive electrical field...at home. I simply want to mention that this instruction makes a whoooole lot of sense to me.
Having 5 volt reference issues after doing head gaskets etc,. My $ is on bad wire cuz I can clear codes and runs fantastic. Shut it down,goes into limp mode.
Thank you for sharing your knowledge! Great presentation! I enjoy learning from great teachers like yourself! Thanks for making the subject not so scary.. New subscriber here! I have learned so much from your presentation & others like scannerdanner, pinehollow, ericthecarguy, mechanic midset & others! God Bless you all!
Fleet mechanic here. Excellent video. Just about every mechanic I know struggles with 5 volt supply and j1939 problems , including myself. Just applied the first step to a Cummins diesel I was working on today. I found the problem in 5 minutes. Same approach I use for j1939 issues , just never used it for 5 volt supply. Again, excellent video.
Solid, clear explanations on how to diagnose the problems in a 5-volt reference system. You have spent some of your time in the automotive industry being an instructor. :)
Thanks gene! Actually being an instructor was a long term goal of mine, but I found that youtube allows me to reach such a broader audience that I really enjoy it! Thanks again for all your positive comments on the videos. 👍
Thank you so much for uploading this simplified instructional video, absolutely AWESOME, it has helped enormously with a very difficult job we had in our shop,but after watching this video, we nailed it rather rapidly, no better sight than the rear number plate of that eyesore disappearing into the sunset with a happy customer 🙂please post more, it most certainly deserves at least a Billion thumbs up. Bless
@@ReignitedAuto Thank you so much for your kind response, interaction often brings forth mutual respect, we believe your systematic and progressive approach with key points in a simplified way aids better understanding,no long winding excessively technical droning makes for a truly innovative learning experience, your channel is vastly underrated, we shall be seeking out all other videos of yours very soon. my father used to say to me; 'There is always something to learn from everyone regardless of our own personal skill level or knowledge,to show gratitude is the very least we must do,and reflects upon our character and upbringing'. may you go from strength to strength,with greater recognition, as all good intention has never ever gone wasted or fell on deaf ear's, THANK YOU 😇🙂👍
Thank you for making this video, you explained everything very throughly and made it easy to understand. I really appreciate the quality of this video!
Finally, someone that took the time to share this in a simple way to understand. Really really, THANK YOU. Now, I can finish up my 99' Suburban with a Crank but won't Start issue since about 3 years... I will update more later. God bless you!
Thanks for the video! I am dealing with a rainstorm damaged system. Replaced fuseblock, gem, pcm,alternator, starter, and starter relay. Pcm was the last purchase and was not necessary. I replaced the alternator due to high frequency signal disrupting the CPS. After replacing I still have other codes for high voltage/malfunction for a few circuits. Turns out they all share 5v ref. All wires have .0, .1 ohms resistance. All wires show 5.05 volts. Chasing this down has driven me partially insane still love this stuff though.
Im really glad i found this video, im going to use it on my stock 1989 2.3 mustang. I accidentally put the sensor in backwards because someone at the shop broke the connector, im not mad its old it happens. Then i tapped the battery together on the positive and negative when I was tightening the battery back up. Now i have to no acceleration issues a while later. I serviced the whole car so yes thank you for this!!!!!!!!!!
I finally understand it thank you for putting this out . I was struggling with trying to understand how a 12 volt system could have multiple 5volt references. I was like it would share the voltage. This helped a lot . Great teacher 👊🏻
Dang. After finding your channel and watching this video, I was really hoping to see more like this. I just replaced timing chains on a 3.6L GM (09 Acadia) and now I have a cam/crank out of sync code. I was very careful about the chains being right on every tooth. I know it probably jumped a tooth at the first startup, but I wanted to check sensors before I tore apart completely and recheck the chains and tensioners.
@@ReignitedAuto So I'm finding out! I also did the cam phasers and oil pump while I was in there, but who knows. Maybe one or more of the replacement phasers wasn't perfect, maybe the crank reluctor shifted, maybe a new tensioner isn't functioning properly, chains out of time despite my best efforts...but at least I can check the 5v circuit first. Thank you for this video.
Thank you for this lesson. I went to school to be a tech and trying to deepen my knowledge while working on my car. Are there any books or other resources that go in depth about DTC diagnosis like the one you’re describing? Once again thank you🙏
Wow best application I gave ffound! Please help l have 2001 xj cherokee check engine light illuminated even though both of my readers have no mil light on and zero codes. Also reads ready for smog check. Is this a short? Where should I look ?
Thank you for this video I’ve been trying to diagnose the same issue with my own nine Sierra and I’ve been so lost because I don’t understand the system. This really helped and I will go through all these steps tomorrow.
Great video! I have a Silverado with 2.5 volts on my 5 volt ref. maf and map 2.5 volts and truck doesn't start. Can a bad sensor cause a 2.5 volt at the 5 volt ref any suggestions appreciated thanks
Mitsubishi eclipse 2000 With key on engine off I'm testing the 5v reference at the connector with the connector disconnected! Am I doing it right. I only get 1.5 volts! I have codes for crank sensor and cam sensor! Appreciate the help!
@@ryanramlochan1504 Not super familiar with a bias voltage myself. It seems to similar in operation to reference voltage, but there might be small differences I'm not aware of.
Excellent job. The PCM sends out 5v to each sensor and reviews the reply/returning voltage. Based on the returning voltage, the PCM determines something is wrong and issues a DTC & turns on the CHECK ENGINE LIGHT so the driver takes it to the dealer and gets fleeced.
Hi, wanted to say great video, i had a question, i have a 2012 gmc acadia 3.6 with 145,000 miles got ripped off on this car started giving me problems 2 days after i bought it. Goes into limp mode and stalls sometimes and tgen sometimes its normal. Any advice what i should look at.
Best overall view of this process I’ve seen yet. Thanks for providing a plan of attack. I currently am experiencing a cranks but will not start situation with no spark, and cannot hear the fuel pump running. Furthermore my scanner says “No communication with PCM.” Been watching ScannerDanner where I first learned of the 5v reference circuit. His videos are good but this video lays it out better. I will be applying this troubleshooting sequence today on my old 98 Dodge Ran 1500.
Its true.....thats the way to diagnose an electrical fault.......i got more or less same on my 2001 JGC WJ L6.... (i still have to fix the engine injectors wiring harness .... but here on the island its kind of difficult to find a good one to replace it).... but as a matter of fact a good procedure for diagnosting those electrical issues....keep it up ... nice job bro..... and bye the way .. have a merry chrismas......👊🏻👍🏻
Buddy....Excellent video! I wish you would make more diag videos on electrical. Solid info. Ive been doing this 15 yrs and still was struggling with5v. The way you explained some of, just hit me all of a sudden. Now kinda feel like a dipshit.
Can you show us how to read, understand, and comprehend electrical wiring diagrams, please? There are alot of viewers with mental learning disabilities and they really want to learn how to read, understand and comprehend electrical wiring diagrams but they struggle to learn it because it has to be broken down like if it was being taught to kids so the minds of the mental learning disabled can get a good grasp on it and comprehension. I like how you teach in this video because i truly feel like it would help the mental learning disabled learn because your teaching style makes it easy to understand and comprehend to where the knowledge can be applied with confidence.
Absolutely great lesson. I'm having probs and will use your instructions to hopefully solve the issue. Virgin all original 2001 Focus no crank no start shutoff while driving dashes for odometer display smell of burnt electrical inside car.
I’m a diy mechanic. This is my first time watching your video and I am very very impress, very collegiate. You made this complex code very easy and simple to understand, love your teaching method. What I love most is your teaching and explaining on the board instead of during a video and watching you do it. I wish you would have shown how to perform short to ground/power but other than that I really enjoyed it.
@@johnbriscoejr9738 They both have their positives and negatives, I've used both over the years, but I prefer alldata myself, it's a little more user friendly.
thank you very much for this video... you have helped and explained very well on how to test this 5v circuit. much love and keep up the great vids and work ✌️👍🤙
Wow iam impressed i should watch this video 3 times a week You are really good at explaining Thank you so much and keep up the good work Ps: i just subscribed i hope to see more great videos
Nice explanation. I think one might also get a no com with the pcm. You could also check voltage at the pcm ground. If it was open you would see high voltage there.?
New subscriber plus new to the field of automotive electronics . Just a retired aircraft technician learning a new skill for self improvement . Thank you excellent educational video. Just a quick question if you come across my comment all these sensors I assume were on circuit A and any other sensors on say circuit B would be getting a 5V reference from a different wire out of the PCM . Thanks for sharing . 👍 Artie
It completely depends on the vehicle, sometimes the manufacturer is actually smart and realizes it's not the best idea to have ALL of the 5v sensors on one circuit 😄 in this case they can split them into two separate circuits. Conversely you can also have one 5v reference circuit, one 7v reference circuit, ect... 👍
Thank you so much for explaining this so simply. Quick question though. So what voltage readings will you get if a VREF and signal circuit touch, if a VREF and ground circuit touch, and a signal circuit and ground circuit touch for example # 6? Thank you again.
I have this problem in my car, this error occurs very sporadically, I failed to start the engine once. thank you for the interesting video in the topic.
Power comes from the pcm, so it should show voltage, but if somewhere downstream the circuitis grounded or shorted to another circuit it will read 0 volts 👍
Good explanation would been nice to put some pics or short videos showing us and with what tools .can we check all tbat you explain with just a multimeter
Thanks for the video! I'm having an issue with my 2009 2500hd and have a 12v on the 5 volt reference circuit on the MAF. I have swapped a cammed LS3 into the truck and it ran mint after the factory truck ECU was tuned for the engine. Then I got poor idle and poor power and drivablity. P0102 code. Bad ground?
If you've got 12v battery power on a 5v reference circuit then you've got another voltage circuit shorted to that one. There should never be 12v on a 5v circuit. 👍
Hey man you rock dude I've been workn on my truck off and on for a year " no bus" I tried shotgun approach. Everything new on the motor &trans. Still won't start no gauges nothin,so I've read so many Forums and I think I tried every one of them. Plugged test light inline got a short light is very brute too it's gotta be gettn full wattage or what ever so I started unplugging stuff to make that light go out I bet you ive unplugged replugged the. Things I so many times I think I got sensor tunnel syndrome I could not wrap my head around the 5v supply until I see this video man I'm broke down in my brother's yard IN THE MIDDLE OF NOWHERE. HE'S A PRICK tells me about everyday to get my piece of shit outta his yard he's seen me go for days without eating. Not IN to drink sleeping in my truck no heat. Summer no fan I been out here close to a year. Tryna get this thing going so I can move on the struggle has been unbelieveable. My jobs are falling through because peaple Realize they gotta come all the way out here to get me and then bring me back everyday not good not a lot of work breaks down to not a lot to eat I think since I've been here I've lost 100lbs not far from it I was in despair again not knowing which way to go or what to do then I watched your show today and it put me on a clear path that I can see clearly now it's too dark to do any thing tonight so I can hardly wait for the sun to peak out I'm confident with the information you gave me I can get my dodge going wish I woulda seen that a year ago thanks soon as it fires up imma throw my basket in the truck go get me a good job and prick won't have to worry about me no more I won't be back ever!!#
Hi, i have 2007 fj cruiser. The engine light are on and others light too. Have P-2743 code transmission fluid temperature or B circuit high. I change the transmission oil, filter and the whole wire thar has two tft sensor and the light continue on. How I can verify the wires and the codutuivity if the cables are under the car and the computer are inside the car.
I have an o6 Silverado 1500. the radiator cooling fans come on high as soon as i start the truck and stay on, but as soon as i unplug the ac high pressure switch the fans work properly. but Ac will not work until i plug the pressure switch back. I am going to use this method to try to figure it out.
@@ReignitedAuto THANK YOU FOR REPLYING BACK. What gets me is both radiator fans will run on high even if the ac and heater are off. I leave to work in the morning, and the temp is 52F and both fans come on high as soon as I start up the truck and stay on until i shut the truck off. I've had 3 shops try to figure it out and paid to replace the PCM but the problem is still there . I have also had to replace the radiator fans because the motors went out due to the fans running all the time. What is a good resource for electrical diagrams? Thank you for your taking the time to help!!
Did you say how to troubleshoot the signal/ground circuit shorted? I listened 3 times and still don't know how to check for that other than to see melted wires. My guess is to check the continuity from each signal wire at the harness side to the battery. Much like you suggested on 3.
Great easy to understand video, very helpful. I have a 09 Silverado, engine went into limp mode , P0641 code. Open circuit. After sitting overnight I took my scan tool and deleted the code. I started it and everything works fine. However I am leery about driving it home as I have to go on a main road with a lot of traffic and no shoulder to pull off. Could a sensor have an intermittent failure or is it more likely a wiring problem?
Thank you for your video and i learn a lot from it. but there is one thing i would like to ask about it and i will be very appreciate if you can answer my question. so when 5 reference voltage short to ground as example #4 on the board, if we unplug every sensor i don't think this is the best way to check the short to ground for 5vref. what if there is a short to ground after that 5v reference voltage splice, for example. the 5v reference vlotage wire of the fuel rail pressure sensor is shorted to ground bewteen the splice and the sensor. after we unplug all the connectors, we still will have resistence reading from pin37 to ground. what i will do is disconnect each terminal from the splice. i will disconnect terminal for pin 37 in that splice first and check the resistence between that "main" 5vref terminal and ground. if i get the reading, that means i have short to ground problem between pin 37 and main 5vref terminal in the main wire, if i dont get the reading, i will put the terminal back, put one multi meter pin on the main 5vref terminal and the other pin on the chassis ground and start to pull out each terminal for the sensors until i loss the resistence reading. plz let me know am i right or wrong, i will be very appreciate for your help. thank you very much.
Very excellent video! In my case, I’m having an issue with the oil pressure unit with 3 wires and when I pulled off the connector with key in the on position and tested the leads I get 8v! Not 12v, not 5v. Given the explanation of the possible problems, I don’t see where this 8v would come from?
Never mind, as you said, “read your diagrams” Turns out there is a dedicated 8v circuit just for the oil pressure sending unit. So this 3 wire oil pressure sender is not on the 5v system at all. Good news is that means the voltage is what it should be
Awesome. got a f250 with 14 volts on 5 volts ref line. I need a diagram bad and hate electric issues. Unplugged everything still 14 volts. Last wire went to fuse box in cab. Pulled that found junkyard markings and lots of probing. 3 hours later needed a break. I will get it eventually. Cant just fire the parts cannon.
Totally agree, in fact, putting new parts on only aggravates the issue because now you have introduced new variables to the scenario. Also while installing new parts you might inadvertently nudge a connector that fixes the issue for a short time. No doubt about it these types of electrical issues are a nightmare!
in the next step for your diagnostic when you are talking about an open before the split of 5V reference , the reference pin at the PCM should give us the 5v on the meter ! am i wrong ? thanks
Hi, nice explanation. I have a question please. In my Toyota the Vacuum regulating valve is controlled by ecm. It was supposed to have sine type volt function, but when I scope it I find continuous 14 volts. This stop the vacuum and the turbo actuator does not move and the engine is powerless. Could be a faulty ecm though the car starts fine and idle fine?
My 5v reference wire shows 12v when back probing with the pcm connected. If I disconnect the pcm it drops down to 0v. I thought it was a short to power but if that was the case wouldn’t 12v always be present regardless if the pcm is connected or not?
I never knew you could wear a tie and teach about automotive electrical so well. I am so impressed. Thank you for the simplicity.
Appreciate you watching!
lol😄
Care Bears & My Pony rainbow T-Shirt would have quite an impression as well. Very respectable as we don't see men dressing up these days more of the unkept pubic hair beard dirty hippy tats all over look is common.
Well he is teaching theory and great at it
I'm not an auto electrical diagnostic technician but i am an electronic technician turned marine electrician - seeking to enter the automotive electrical field...at home. I simply want to mention that this instruction makes a whoooole lot of sense to me.
GREAT WAY of explaining!
Having 5 volt reference issues after doing head gaskets etc,. My $ is on bad wire cuz I can clear codes and runs fantastic. Shut it down,goes into limp mode.
Thank you for sharing your knowledge! Great presentation! I enjoy learning from great teachers like yourself! Thanks for making the subject not so scary.. New subscriber here! I have learned so much from your presentation & others like scannerdanner, pinehollow, ericthecarguy, mechanic midset & others! God Bless you all!
Fleet mechanic here. Excellent video. Just about every mechanic I know struggles with 5 volt supply and j1939 problems , including myself. Just applied the first step to a Cummins diesel I was working on today. I found the problem in 5 minutes. Same approach I use for j1939 issues , just never used it for 5 volt supply. Again, excellent video.
I am an auto electrician for years. I am amazed with this troubleshooting skills. Thanks you so much I will always be on board with you.
Great white board usage professor!
I aim to please! 😄 Thanks for watching Tom! 👍
Solid, clear explanations on how to diagnose the problems in a 5-volt reference system. You have spent some of your time in the automotive industry being an instructor. :)
Thanks gene! Actually being an instructor was a long term goal of mine, but I found that youtube allows me to reach such a broader audience that I really enjoy it! Thanks again for all your positive comments on the videos. 👍
This is the Best ever diagnostic video, I have ever seen. Awesome instructor! Thanks.
I particularly like the step by step writing results down. Easy to get lost and frustrated if you don’t.
Spoken by the man himself! 👍
Thank you so much for uploading this simplified instructional video, absolutely AWESOME, it has helped enormously with a very difficult job we had in our shop,but after watching this video, we nailed it rather rapidly, no better sight than the rear number plate of that eyesore disappearing into the sunset with a happy customer 🙂please post more, it most certainly deserves at least a Billion thumbs up. Bless
So glad it helped! You're absolutely right, nothing better than watching a problem child go out the door 👍
@@ReignitedAuto Thank you so much for your kind response, interaction often brings forth mutual respect, we believe your systematic and progressive approach with key points in a simplified way aids better understanding,no long winding excessively technical droning makes for a truly innovative learning experience, your channel is vastly underrated, we shall be seeking out all other videos of yours very soon. my father used to say to me; 'There is always something to learn from everyone regardless of our own personal skill level or knowledge,to show gratitude is the very least we must do,and reflects upon our character and upbringing'. may you go from strength to strength,with greater recognition, as all good intention has never ever gone wasted or fell on deaf ear's, THANK YOU 😇🙂👍
Thank you professor
Thank you for showing us how to be a better technician.
Thank you for making this video, you explained everything very throughly and made it easy to understand. I really appreciate the quality of this video!
Thank you, very helpful. I was testing with my sensors plugged in!
Finally, someone that took the time to share this in a simple way to understand. Really really, THANK YOU. Now, I can finish up my 99' Suburban with a Crank but won't Start issue since about 3 years... I will update more later. God bless you!
Thanks for watching Jose!
Shirt and tie on, excellent 👍
Thanks for the video! I am dealing with a rainstorm damaged system. Replaced fuseblock, gem, pcm,alternator, starter, and starter relay. Pcm was the last purchase and was not necessary. I replaced the alternator due to high frequency signal disrupting the CPS. After replacing I still have other codes for high voltage/malfunction for a few circuits. Turns out they all share 5v ref. All wires have .0, .1 ohms resistance. All wires show 5.05 volts. Chasing this down has driven me partially insane still love this stuff though.
Im really glad i found this video, im going to use it on my stock 1989 2.3 mustang. I accidentally put the sensor in backwards because someone at the shop broke the connector, im not mad its old it happens. Then i tapped the battery together on the positive and negative when I was tightening the battery back up. Now i have to no acceleration issues a while later. I serviced the whole car so yes thank you for this!!!!!!!!!!
This video is straightforward, systematic, concise, and thorough.👌
This is great, do you have a video on crank but no start
I finally understand it thank you for putting this out . I was struggling with trying to understand how a 12 volt system could have multiple 5volt references. I was like it would share the voltage. This helped a lot . Great teacher 👊🏻
Thanks for watching i appreciate it!
Thanks your great now i know how to check my computer for 5 volt reference to know if my computer is bad Thanks God Bless You
This is the best explanation and study guid to understanding 5v references, thank you for keeping it SIMPLE. I will subscribe
Dang. After finding your channel and watching this video, I was really hoping to see more like this. I just replaced timing chains on a 3.6L GM (09 Acadia) and now I have a cam/crank out of sync code. I was very careful about the chains being right on every tooth. I know it probably jumped a tooth at the first startup, but I wanted to check sensors before I tore apart completely and recheck the chains and tensioners.
Those engines are notorious for that nonsense! i've done a couple on some Suzuki vehicles that use that GM engine weirdly. Always a pain in the butt.
@@ReignitedAuto So I'm finding out! I also did the cam phasers and oil pump while I was in there, but who knows. Maybe one or more of the replacement phasers wasn't perfect, maybe the crank reluctor shifted, maybe a new tensioner isn't functioning properly, chains out of time despite my best efforts...but at least I can check the 5v circuit first. Thank you for this video.
Very methodical and best explanation I have seen so far.
Appreciate you watching! 👍
Thank you for this lesson. I went to school to be a tech and trying to deepen my knowledge while working on my car. Are there any books or other resources that go in depth about DTC diagnosis like the one you’re describing? Once again thank you🙏
Wow best application I gave ffound! Please help l have 2001 xj cherokee check engine light illuminated even though both of my readers have no mil light on and zero codes. Also reads ready for smog check. Is this a short? Where should I look ?
Thank you for this video I’ve been trying to diagnose the same issue with my own nine Sierra and I’ve been so lost because I don’t understand the system. This really helped and I will go through all these steps tomorrow.
The best instructor there's. You qualify to be a professor
Great video! I have a Silverado with 2.5 volts on my 5 volt ref. maf and map 2.5 volts and truck doesn't start. Can a bad sensor cause a 2.5 volt at the 5 volt ref any suggestions appreciated thanks
with this your tutorial, i feel inside college of auto wiring already
Appreciate you watching Charles!
Mitsubishi eclipse 2000
With key on engine off I'm testing the 5v reference at the connector with the connector disconnected!
Am I doing it right.
I only get 1.5 volts!
I have codes for crank sensor and cam sensor!
Appreciate the help!
Never knew what a reference voltage was till I saw your video,very good explanation
Thanks for watching!
@@ReignitedAuto do 2 pin cam an crank sensor have reference voltage as well
@@ryanramlochan1504 Nope, those generate a a voltage signal by metal teeth passing near the magnetic end of the sensor, just like wheel speed sensors.
@@ReignitedAuto thanks just one more thing.whats a bias voltage and the simplest way to understand it
@@ryanramlochan1504 Not super familiar with a bias voltage myself. It seems to similar in operation to reference voltage, but there might be small differences I'm not aware of.
Excellent job. The PCM sends out 5v to each sensor and reviews the reply/returning voltage. Based on the returning voltage, the PCM determines something is wrong and issues a DTC & turns on the CHECK ENGINE LIGHT so the driver takes it to the dealer and gets fleeced.
Thank you! I will be coming back to this video everyday!
Appreciate you watching!
raymond.well explained and made interesting
I appreciate you watching Raymond!
Hi, wanted to say great video, i had a question, i have a 2012 gmc acadia 3.6 with 145,000 miles got ripped off on this car started giving me problems 2 days after i bought it. Goes into limp mode and stalls sometimes and tgen sometimes its normal. Any advice what i should look at.
This video is great it raised my diagnosis tragedies ,wish to see more of your videos
Thanks for watching Vusi!
Best overall view of this process I’ve seen yet. Thanks for providing a plan of attack. I currently am experiencing a cranks but will not start situation with no spark, and cannot hear the fuel pump running. Furthermore my scanner says “No communication with PCM.” Been watching ScannerDanner where I first learned of the 5v reference circuit. His videos are good but this video lays it out better. I will be applying this troubleshooting sequence today on my old 98 Dodge Ran 1500.
Its true.....thats the way to diagnose an electrical fault.......i got more or less same on my 2001 JGC WJ L6.... (i still have to fix the engine injectors wiring harness .... but here on the island its kind of difficult to find a good one to replace it).... but as a matter of fact a good procedure for diagnosting those electrical issues....keep it up ... nice job bro..... and bye the way .. have a merry chrismas......👊🏻👍🏻
Your tutorial is simply the best and easy to digest. thanks man.
Thanks for watching! 👍
Buddy....Excellent video! I wish you would make more diag videos on electrical. Solid info. Ive been doing this 15 yrs and still was struggling with5v. The way you explained some of, just hit me all of a sudden. Now kinda feel like a dipshit.
Wow very informative ❤ . Thanks
Thank you .I've been looking just for this info.You explain this so well.
I appreciate that, thank you for watching!
Can you show us how to read, understand, and comprehend electrical wiring diagrams, please? There are alot of viewers with mental learning disabilities and they really want to learn how to read, understand and comprehend electrical wiring diagrams but they struggle to learn it because it has to be broken down like if it was being taught to kids so the minds of the mental learning disabled can get a good grasp on it and comprehension. I like how you teach in this video because i truly feel like it would help the mental learning disabled learn because your teaching style makes it easy to understand and comprehend to where the knowledge can be applied with confidence.
Absolutely great lesson. I'm having probs and will use your instructions to hopefully solve the issue. Virgin all original 2001 Focus no crank no start shutoff while driving dashes for odometer display smell of burnt electrical inside car.
You make it sound almost easy
As I was editing the video I was thinking, "does this even make sense?" 😂
Awsome video with clear explanations. Just awesome big dawg 🙌🏽
Very good quick and simple explanation, new sub here
I appreciate it my man 👍
Good clair explanation and was easy to understand good job
Extremely helpful video. Well done!
Thanks man! 👍
I’m a diy mechanic. This is my first time watching your video and I am very very impress, very collegiate. You made this complex code very easy and simple to understand, love your teaching method. What I love most is your teaching and explaining on the board instead of during a video and watching you do it. I wish you would have shown how to perform short to ground/power but other than that I really enjoyed it.
Hey thank you very much I appreciate that! I hope you were able to learn something from the video 👍
@@ReignitedAuto so what is the schematic software alldata or Mitchell?
@@johnbriscoejr9738 They both have their positives and negatives, I've used both over the years, but I prefer alldata myself, it's a little more user friendly.
@@ReignitedAuto now I’m trying to learn how to read wiring diagrams, very , very difficult
@@johnbriscoejr9738 it's definitely like a different language at first 👍
thank you very much for this video... you have helped and explained very well on how to test this 5v circuit. much love and keep up the great vids and work ✌️👍🤙
Thank you very much. To share your knowledge and work.
Wow iam impressed i should watch this video 3 times a week
You are really good at explaining
Thank you so much and keep up the good work
Ps: i just subscribed i hope to see more great videos
Thank you for the kind words and I appreciate you watching! 👍
Intense explanation mate thanks for sharing, it's my first time to hear about the 5v reference sucket and I enjoyed it God bless you.
Awesome video, how could I learn more about 5V reference circuits? Also, is reference voltage the same as signal voltage? Thanks!
The reference voltage is the voltage that comes into the sensor, the signal voltage is what comes out of the sensor and goes to the PCM 👍
Nice explanation. I think one might also get a no com with the pcm. You could also check voltage at the pcm ground. If it was open you would see high voltage there.?
Just what I needed. Thank you
New subscriber plus new to the field of automotive electronics . Just a retired aircraft technician learning a new skill for self improvement . Thank you excellent educational video. Just a quick question if you come across my comment all these sensors I assume were on circuit A and any other sensors on say circuit B would be getting a 5V reference from a different wire out of the PCM . Thanks for sharing . 👍 Artie
It completely depends on the vehicle, sometimes the manufacturer is actually smart and realizes it's not the best idea to have ALL of the 5v sensors on one circuit 😄 in this case they can split them into two separate circuits. Conversely you can also have one 5v reference circuit, one 7v reference circuit, ect...
👍
Thank you so much for explaining this so simply. Quick question though. So what voltage readings will you get if a VREF and signal circuit touch, if a VREF and ground circuit touch, and a signal circuit and ground circuit touch for example # 6? Thank you again.
I have this problem in my car, this error occurs very sporadically, I failed to start the engine once. thank you for the interesting video in the topic.
Great job man! Easy to follow, A friend of mine has a 06 duramax doing the same thing, Thanks for sharing your knowledge, Cheers 🍻
Thanks for watching Zeke! 👍
When testing, is the vehicle accessories on engine off ?
Engine is always off, but whether the key is on or not depends on whether you are doing a voltage test or a continuity test.
Nice logical walk through.
For me it’s nuts and bolts all day. Electrical? No way 😂
Great work man 👍
When pin is in wire connector at PCM, shouldn't there be power?.or does 5v comes to PCM,?,thx
Power comes from the pcm, so it should show voltage, but if somewhere downstream the circuitis grounded or shorted to another circuit it will read 0 volts 👍
Thank-you so much, excellent board lessons and tool recommendations!
Clear and informative easy to understand. ta.
Good explanation would been nice to put some pics or short videos showing us and with what tools .can we check all tbat you explain with just a multimeter
Very good explanation and demonstration thanks 👌👍💐
Very well explained, thank you
Outstanding video! It explained a lot for me! Less intimidated now :)
Thanks for the video! I'm having an issue with my 2009 2500hd and have a 12v on the 5 volt reference circuit on the MAF. I have swapped a cammed LS3 into the truck and it ran mint after the factory truck ECU was tuned for the engine. Then I got poor idle and poor power and drivablity. P0102 code. Bad ground?
If you've got 12v battery power on a 5v reference circuit then you've got another voltage circuit shorted to that one. There should never be 12v on a 5v circuit. 👍
Hey man you rock dude I've been workn on my truck off and on for a year " no bus" I tried shotgun approach. Everything new on the motor &trans. Still won't start no gauges nothin,so I've read so many
Forums and I think I tried every one of them. Plugged test light inline got a short light is very brute too it's gotta be gettn full wattage or what ever so I started unplugging stuff to make that light go out I bet you ive unplugged replugged the. Things I so many times I think I got sensor tunnel syndrome I could not wrap my head around the 5v supply until I see this video man I'm broke down in my brother's yard IN THE MIDDLE OF NOWHERE. HE'S A PRICK tells me about everyday to get my piece of shit outta his yard he's seen me go for days without eating. Not IN to drink sleeping in my truck no heat. Summer no fan I been out here close to a year. Tryna get this thing going so I can move on the struggle has been unbelieveable. My jobs are falling through because peaple
Realize they gotta come all the way out here to get me and then bring me back everyday not good not a lot of work breaks down to not a lot to eat I think since I've been here I've lost 100lbs not far from it I was in despair again not knowing which way to go or what to do then I watched your show today and it put me on a clear path that I can see clearly now it's too dark to do any thing tonight so I can hardly wait for the sun to peak out I'm confident with the information you gave me I can get my dodge going wish I woulda seen that a year ago thanks soon as it fires up imma throw my basket in the truck go get me a good job and prick won't have to worry about me no more I won't be back ever!!#
excellent video, well spoken
Thanks for watching Brian!
Nice video, I followed it all but was confused about how to check step 6, you found melted wires but how? Thanks
Great work teaching
Thanks so much for the info, problem is where can I find a wiring and pinout diagram for a Chev Cruze 1,6 LS 2014 model, nobody sems to can help.
Hi, i have 2007 fj cruiser. The engine light are on and others light too. Have P-2743 code transmission fluid temperature or B circuit high. I change the transmission oil, filter and the whole wire thar has two tft sensor and the light continue on. How I can verify the wires and the codutuivity if the cables are under the car and the computer are inside the car.
I have an o6 Silverado 1500. the radiator cooling fans come on high as soon as i start the truck and stay on, but as soon as i unplug the ac high pressure switch the fans work properly. but Ac will not work until i plug the pressure switch back. I am going to use this method to try to figure it out.
John that's actually normal if your a/c is on, or the vehicle is in defrost mode, the fans will be on high.
@@ReignitedAuto THANK YOU FOR REPLYING BACK. What gets me is both radiator fans will run on high even if the ac and heater are off. I leave to work in the morning, and the temp is 52F and both fans come on high as soon as I start up the truck and stay on until i shut the truck off. I've had 3 shops try to figure it out and paid to replace the PCM but the problem is still there . I have also had to replace the radiator fans because the motors went out due to the fans running all the time. What is a good resource for electrical diagrams? Thank you for your taking the time to help!!
Replace coolant sensor and temperature sensor and check all wiring to those components
YOU ARE GREAT MAN ❤
Very well explained boss
Did you say how to troubleshoot the signal/ground circuit shorted? I listened 3 times and still don't know how to check for that other than to see melted wires. My guess is to check the continuity from each signal wire at the harness side to the battery. Much like you suggested on 3.
Great easy to understand video, very helpful. I have a 09 Silverado, engine went into limp mode , P0641 code. Open circuit. After sitting overnight I took my scan tool and deleted the code. I started it and everything works fine. However I am leery about driving it home as I have to go on a main road with a lot of traffic and no shoulder to pull off. Could a sensor have an intermittent failure or is it more likely a wiring problem?
Great lesson...thanks!
Does all the sensors with common wire have common colour wire to computer in different brands of cars
Excellent video
Shotgun approach? It's called the "Parts Cannon" dude. Geez... Good video
"Fire in the hole!" 😄
Thank you for your video and i learn a lot from it. but there is one thing i would like to ask about it and i will be very appreciate if you can answer my question. so when 5 reference voltage short to ground as example #4 on the board, if we unplug every sensor i don't think this is the best way to check the short to ground for 5vref. what if there is a short to ground after that 5v reference voltage splice, for example. the 5v reference vlotage wire of the fuel rail pressure sensor is shorted to ground bewteen the splice and the sensor. after we unplug all the connectors, we still will have resistence reading from pin37 to ground. what i will do is disconnect each terminal from the splice. i will disconnect terminal for pin 37 in that splice first and check the resistence between that "main" 5vref terminal and ground. if i get the reading, that means i have short to ground problem between pin 37 and main 5vref terminal in the main wire, if i dont get the reading, i will put the terminal back, put one multi meter pin on the main 5vref terminal and the other pin on the chassis ground and start to pull out each terminal for the sensors until i loss the resistence reading. plz let me know am i right or wrong, i will be very appreciate for your help. thank you very much.
When checking 5V, do we connect Voltmeter negative lead to Battery Negative post?
Very excellent video! In my case, I’m having an issue with the oil pressure unit with 3 wires and when I pulled off the connector with key in the on position and tested the leads I get 8v! Not 12v, not 5v. Given the explanation of the possible problems, I don’t see where this 8v would come from?
Never mind, as you said, “read your diagrams” Turns out there is a dedicated 8v circuit just for the oil pressure sending unit. So this 3 wire oil pressure sender is not on the 5v system at all. Good news is that means the voltage is what it should be
Good job verifying that though! 👍
Awesome. got a f250 with 14 volts on 5 volts ref line. I need a diagram bad and hate electric issues. Unplugged everything still 14 volts. Last wire went to fuse box in cab. Pulled that found junkyard markings and lots of probing. 3 hours later needed a break. I will get it eventually. Cant just fire the parts cannon.
Totally agree, in fact, putting new parts on only aggravates the issue because now you have introduced new variables to the scenario. Also while installing new parts you might inadvertently nudge a connector that fixes the issue for a short time. No doubt about it these types of electrical issues are a nightmare!
Awesome job
in the next step for your diagnostic when you are talking about an open before the split of 5V reference , the reference pin at the PCM should give us the 5v on the meter ! am i wrong ? thanks
3.17v when I was able to test on a 2003 expedition. Used two meters to be sure.
Hi, nice explanation. I have a question please. In my Toyota the Vacuum regulating valve is controlled by ecm. It was supposed to have sine type volt function, but when I scope it I find continuous 14 volts. This stop the vacuum and the turbo actuator does not move and the engine is powerless. Could be a faulty ecm though the car starts fine and idle fine?
What sensors does the 7.3 use the the 5v reference my truck pcm no communication was working but now nothing but will not start
Great teacher!!! Thank You
This video is great!
My 5v reference wire shows 12v when back probing with the pcm connected. If I disconnect the pcm it drops down to 0v. I thought it was a short to power but if that was the case wouldn’t 12v always be present regardless if the pcm is connected or not?