DODGE RAM 5500 OVERHEATING P0692 FAN CLUTCH CIRCUIT DIAGNOSIS

In today's video we take a look at a 2011 Dodge Ram 5500 W/ a Cummins Diesel engine. The customer complaint is that the truck is overheating when carrying a heavy load. The truck has already been to 2 different mechanics and has already had the coolant sensor and fan clutch replaced. Using a scan we find that we have a DTC P0692 Fan Clutch Circuit High code stored in the engine computer. Follow along as I almost made the mistake of misdiagnosing this as a bad engine computer.
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Disclaimer:
Due to factors beyond the control of Advanced Level Auto, I cannot guarantee against improper use or unauthorized modifications of this information. Advanced Level Auto assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Advanced Level Auto recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of Advanced Level Auto, no information contained in this video shall create any expressed 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 from the information contained in this video is the sole responsibility of the user and not Advanced Level Auto.

[@stealthg35infiniti94]

Great job Eric. I've learned the hard way, never assume the parts the previous technician replaced was good. Always start your troubleshooting from scratch.

[@crashoverride328]

Agreed, sometimes the biggest mistake you can make is to assume that just because something is new it must work. Sometimes all it means is it isn't rusted in place when you need to change it again.

[@robertmedina6875]

Great point 👍👍

[@notsureigaf]

Yeah, seen too many situations where the brand new part (usually some gibberish-named knockoff from Amazon) was worse than the old one, though in this case the previous "mechanic" simply lied altogether. Hope the Ram guy can get his money back somehow.

[@jasonmorales1846]

These type of videos are better when mistakes are left in.It shows you are human and how you corrected the issue.I appreciate you doin that.

[@roxanneabbott8424]

Awesome work Eric!!! A true mechanic with full disclosure!!!

[@EATSLEEPFARM]

I feel like i repeat myself on every one of your videos but ive gotta say it again. You explain whats going on during a diagnosis better then ANYONE on youtube. Explaining the bias voltage from the pcm is using that as a test for the circuit then showing it loaded… 👏 👏 👏. Thats the type of stuff alot of people would skip over or assume alot of people would know. Great stuff as usual brother 👍

[@onlinemn]

I love the way you explain electrial diagrams, it's nice to see people who truly understand them , when I went to vocational school years ago one thing my instructor inculcated into our heads was you need to understand basic electricity and schematics to ever make it in the field, to this day I continually use what I've learned even though I'm not in the business of car repair but I still do it for lots of friends and relatives because there is a lot of mechanics out there who do not understand how to or even repair electrical problems or even do this kind of Diagnostics , I am in the electrical field , I do lots of problem solving that other electricians cannot figure out by the way. Keep up the good work and making the videos that are truly impressive I can not imagine how much time you spend making them, hopefully someday you'll be able to hire your son or (daughter if you have one) to edit them for you like a lot of other KZbinrs and they can make an income also and enjoy doing what they do. Have a great day.

[@lustfulvengance]

I work on heavy trucks 99% of which have Cummins engines in them, it is almost impossible to kill an ECM on a Cummins engine! I have seen: 1. Every input and output you can imagine shorted to power or ground 2. 12 volt trucks jumped with 24 volts 3. Batteries connected backwards 4. ECM reflashes failing halfway through 5. Every fluid you can imagine being spilled all over them 6. Technicians dropping them on the ground They're tough, and you would hope so considering the damn thing cost like $3,000 in big truck applications

[@dieselfixr]

I do agree cummins HD ecm's are pretty tough. I also work on HD class 8 trucks. Had 1 cummins ecm die at are shop but no fault of its own. The unit got stuck by lightning on are yard blew both steers out. Everything electrical was fried.

[@no-worries-its-okay]

You always make great videos! This one is no exception! Keep them coming.

[@unclemarksdiyauto]

Eric, what a fantastic diag! Whew, dodged a bullet not calling it a $4000 computer and being wrong. You always do a great job of thinking things through. Customer should also be thrilled! Thanks again for posting, we have all learned something on how this circuit works.

[@jgeorges3061]

ERIC, UR truly a technician with integrity and honesty who every one would love to bring his vehicle to you to fix the right way as u did with this one as always AWESOME information and approach thanks for sharing.

[@ignacioromero5014]

Hey bro new subscriber from Los Angeles, loving your tenacity to hunt these issues down, I'm a novice car mechanic, only really work on my own cars (BMWs/Chevy 1965). Keep up the great work!!!

[@mikechiodetti4482]

You found the problem and fixed it......period! GREAT DIAGNOSIS! If that's a Cummins engine and fan unit, they have a pretty thorough diagnostic test, in some cases you have to know "Cummins Speak" but once you've done one, you'll know! My knowledge is limited and it was over 6 years ago working with a Cummins CNG engine. Fun time!

[@themechanic6117]

I'm sure the customer learned their lesson and won't take their truck back to that "mechanic" . That harness coming off the fan clutch didn't look new to me.great video

[@sambitar8448]

ERIC, YOUR THOUGHTS AND DIAGNOSIS ARE SO LOGICAL AND WELL ORGANIZED BEYOUND WORDS DESCRIPTIONS, THANK A MILLION FOR YOUR EFFORT. RIGHT ON THE MONEY.

[@charliemendoza4032]

Your the best and honest Eric, Keep up the great work. I am always learning new things from your videos. People these days buy cheap used parts and install them without knowning it could be defective. Being honest and informing the customer of the repair with detail is always the best way to do it.

[@roooon2]

truly a technician with integrity and honesty

[@706redpepper8]

Thank you sir for this full in-depth diagnostic , I just replaced my clutch fan and after pulling a load of 28k. My truck was doing the same and the diesel shop I went to was doing the same Diagnostics and same tools you have and you have now proved that my pcm is still good and I’ll be getting a different brand

[@riblets1968]

I'm an old school auto and truck mechanic that enjoys auto diagnoses videos because I hope to learn something about modern vehicles and; by and large, I have. However, one thing that I've heard on other videos by other mechanics before but never understood was the idea of a bias voltage. You, Eric, were the first to actually explain what it is and how, precisely, it is used for auto system control. That was very, very cool! You're a born teacher! Oz is pretty good at it too but I really like how you go out of your way to explain things to us knuckleheads. Much appreciated, sir!

[@TheCrazy243]

Great video! I misdiagnosed my friend’s car. Her car couldn’t move backward. Thought it was suspension related part or transmission . Turned out brake pad were came loose. Pad material were gone. Rotor was thin! Not an expert in Suspension system… I’m a young tech..so I’m constantly learning! It’s a pain but crazy! You are very honest and I learned a lot from you!

[@turtlebro4498]

Awesome work Eric. I was out of town working one day when the company truck a 2017 Ram 2500 was having a similar issue where it would heat up and reduce the speed it could be driven when towing a trailer. it was a 16 foot enclosed trailer with maybe 1,500 LBS of extra weight aside from the trailer. should not have been an issue. i towed the trailer with my truck so we could make if to and from the hotel but we finally took a look and there was a small connector in the shape of an L that came from a hose and connected to a pipe that keep breaking. we replaced it with an identical unit and it broke. so we grabbed some fittings from home depot and a hose from autozone and replaced the piece. has worked like a charm since then

[@gabrielsaldana8913]

Another great video, excellent troubleshooting I really enjoy watching you diagnose problems ,the way you explain things is very clear and concise, I'm a retired Master Tech of 40 years and I'm still learning, Great job!

[@sambitar8448]

ERIC, YOU ARE A GREAT DIAGNOSTICS TECH AND WELL AWARE OF THE INCOMPLETE OF TECHNICAL DATA PROVIDED TO ALL OF US IN OUR FIELD. YOU DEFINITELY VERIFIED THE ECM IS NOT BAD. CONGRATUALATION ON A JOB WELL DONE.

[@wolfnorth7075]

Eric. thank you for a very detailed electrical fix. Among every auto fix, electrical ones are the hardest. you have shown us honestly on your fixing. BTW, I do rant this world a little, you do deserve a shop to help people out.

[@Mahees_230]

Pisses me off to see a customer get jerked around like that on such a simple repair. I'm glad you could help him out.

[@neilmurphy845]

I'm glad that you left the mistakes in the video because that's how thing's work sometimes

[@franka2507]

Nice diag. You did due diligence which saved the customer tons of money.

[@2eagle86]

I've seen other mechanics here but your very thorough and fix everything at the end I'm glad I found your channel

[@stencils118]

Another great video, thanks for the upload! I love how you still keep your videos real and don't try and bullshit your viewers by editing out the 'mistakes'. It's the 'mistakes' that help us all learn. Also it's so much tougher when the manufacturers don't share important information regarding how a system works or what sort of readings you should expect! Looking forward to your next video!

[@michaelshadwick3487]

I've recommended your channel before seeing this video.. now I'm thinking that I cannot advocate your work enough!

[@deankay4434]

I like it, from a retired ASE master! Why, when the service tech uses common sense and finds a problem, it becomes fixed. I don’t like PWM fan clutches but this is the world of lower emissions and higher fuel economy we live in! But you have to verify the customers concern, then following “TSB’s” if any, then diagnose the root cause. Too many repair the symptom and replace a part. Go to the parts store and let them read the current code. Just understand if it says “O2” sensor, does not mean it is bad. Too low for long time, too high for long time, heater open, high resistance because a new exhaust had an O2 wire melt on it. You see, the code only points to the component, but does not diagnose the real reason. Parts stores enjoy selling $170 heated 4 wire O2 sensors, but it may be correctly reporting a problem as say the fuel pressure regulator is dripping raw fuel past a ruptured diaphragm (If Yours Has One) but in this case, the O2 is reporting a rich mixture over a long period of time (Varies by Manufacture) but is fine. Complicated? Yes, blame the Government for CAFE standards, CARB for setting expectations for emissions, EPA for the rules and marketing for noise, safety, and MPG and others like crash testing to set insurance rates. Then how big the city is, number of accidents, deaths, theft as you move into the country 200-300 miles from a big city, your rate can drop 39%. Fact! ASE master tech since 1978.

[@stephencook4611]

It's nice to see your back in the saddle again. Look's like all is well with you. Hopefully you are back on track.

[@The_Redkween]

Awesome job, Eric! That was some first-class diagnostics, there and proof that experience really does make a difference. The experience gives you that instinctual “gut feeling” when something isn’t right.

[@samrugtiv3839]

Eric very very well done my friend i worked on the cs at the dealership 35 years .Well done sam

[@normandfogarty3505]

Your troubleshooting skills impress me more every time I watch you working your magic. Love this channel!! 👍👍

[@goducgo]

I watched the whole thing. Great video.Finding a great mechanic is the hardest most expensive part.

[@ecaparts]

Thanks for the case study Eric!! What a great feeling you get from almost misdiagnosing a job, but end up rechecking and finding something totally different. A great learning experience! It’s best practice to NEVER assume anything and to test for yourself (even if a part is new or someone already ‘diagnosed’), then recheck if you have an unexpected result. Great work! 👍

[@gilron9585]

I like that you do double check everything and treat the customer's money like it was yours :)

[@adrpals2324]

Good job. At my job when someone does a repair and the machine is still not working. I check the tech's work first. I've found a few times that they made a mistake.

[@bartscave]

Thanks for showing everything! I wish service information would mention bias voltage.

[@VashthStampeede]

I cannot believe how many times technical information called it a clutch fan. A clutch fan, if one really exists would be a device that cools your clutch. A clutch may indeed overheat and be in need of cooling, but I know of no device designed to do so. A fan clutch, on the other hand, would be the proper device to engage the radiator cooling fan. Just one of my pet peavs. Just saying. Great video Eric. Keep 'em coming.

[@dave0z96]

Today wasn’t a waste I leaned something from this video . Nice work I’m subscribing .

[@foxwithtubesox1075]

Awesome episode! Glad to see the whole diagnosis process. Big props for your honesty and including the part where you got sidetracked.

[@faustogonzalez8397]

Absolutely awesome Eric great work, I learned quite a bit and as always when you make a mistake , it stays in your mind and you remember for a long time !!

[@DanielSan-ch7dr]

Glad to see you back in the field and making videos again. It was a shame to lose your shop but most your work seem s to be on site anyway so no point paying for something that your never at. Love your work and have learnt alot from your videos.

[@chuckvoss9344]

Thank you for the thought process. The bias voltage was an eye opener. Good job!

[@kellyx57]

Thanks for explaining how the bias voltage is used to verify circuit integrity. Nice work!

[@maddenterprisesllc.3914]

Great video I learned a lot Wish you would’ve showed taking out and putting fan clutch back in. You took your time overall with a customers vehicle and didn’t just do some random ish. Very thorough I’m sure your clientele loves you.

[@frankjohn4302]

It's good to show the human side of things. You got my respect when you worked on that flooded out lexus

[@dansaver8247]

You're a terrific mechanic. Good job done.

[@aaronfox5808]

Thank you for leaving and explaing the footages , great for younger newer techs to learn from.

[@gerrylarson3675]

Wow, pretty good. Thanks You're lots quicker than me at getting out of those rabbit holes in good shape!

[@biglevstergarage]

Great job Eric, you are awesome no matter what. Everyone makes honest mistakes and has to clarify errors in their minds. Just shows you care about the quality of what you do. Also shows you are a legit honest mechanic.

[@snakecantu]

Long Video. BUT so much helpful info. My old 2005 Dodge 2500 had a similar problem, wasn't to replace the freaking expensive computer. So this explains some of the issues and unknowns i was dealing with. Learned about the load test, so when my buddy replaces the Tranny on my old Dodge I can help him figure it out so he can maybe get that old 5.9 to 750k.

[@Silentb00]

Another great educational video. Learned a lot from it. Your number one in my book. You a true diagnosis you add teaching in your videos and it helps a lot.

[@davidwall6851]

Eric I really admire your ability to diagnose even though it meant 2nd guessing yourself. I'm here in Tx. as well and just recently started my mobile advanced diagnostics/module programming business. I would love to talk to you and hear how your charging for your services. Let me know if we can chat. Thx David

[@kenbowden4965]

Love your videos. You are truly a great mechanic and system analyzer. Your explanations of complex systems are great. Just wished you were closer to where I live.

[@e.l.9589]

The amount of information is appreciated, even if I have no issues.

[@HP-mx6jb]

This is the difference between a code reader mechanic and a technician. Troubleshoot till you can verify the problem and repair.

[@JohnDiMartino]

Nice job ! Unfortunately some scab took the truck owner for a ride. I learned a lot about the pcm voltage from you,thanks again.

[@autoacoustics4938]

I normally like the video before it starts cos I know its going to be good 😊😊

[@paulmuff9883]

Hi I’ve just found this channel, & I’m impressed with you contents quality so iv subscribe as I’ve enjoyed it , manny thanks 👍😀 Ps I can’t understand why a manufacturer would put a computer and all the wire plugs in scutch a place where it’s vulnerable to the outside elements being so close to the ground et cetera???

[@sweetbone39]

Bro you are one of the Best Mechanics Ive ever seen on youtube. What city you from?

[@danielgreenbaum8875]

Thats a great video Eric and explaining bias voltage and always test and not guess as seen ecu put on cars as they not checked wiring and rule out new parts already fitted that are faulty or been broken when fitted

[@stevenbarber2703]

love your videos i love car videos i am going to be a mechanic the more vids i watch the more i learn thanks for your time and videos :)

[@robertmedina6875]

Great video Eric!! I actually did know about bias voltage… how ever it slipped my mind about Chrysler using it🤷Great job teaching us! We are all human 👍

[@VashthStampeede]

Kudos Eric for correctly pronouncing some ignorant technical writer's misnomer.

[@carlosolvera72]

Very useful. Still learning on how to test these pulse circuits and about bias voltage, this video explained a lot

[@fmbfla]

Good save on the explanation at 15:50. When something is PWM, pwr or gnd contl. I Always look at the PWM sig First this can tell me if the controller is actually working and if there is a pwr or gnd error then the check pwr and grd wgile doing BI/D/C of the device. 90/100% should mean full pwr or full gnd else 20% or less is opposite

[@fmbfla]

And as I watch the end of the video I see my self 5 years ago Fudge yea ! Member dat day! And put DAT on a Cracker DUDE!

[@W.Khairi]

Hats off, U deserve every penny for the excellent diag.

[@danielfarmer4311]

Your a class act man. Great work! I love the part about guys that know everything. No kidding! Love the channel man 😎🇺🇸

[@whiteoneauto]

Glad you didn't just throw PCM in it. Great job.

[@jeffreygoss8109]

Brave man following behind hacks. Hopefully people will go to you first in the future.

[@JoeBribem]

Good stuff dude. Love the electrical troubleshooting videos.

[@nathanielreid4967]

I like to see the usages of the power prob. Great job! I wonder why they are not used more often?

[@paulgilliland2992]

Nice work. I learned something from this repair.

[@CrazyPetez]

As usual, great trouble shooting Eric. I’m surprised the PCM is bolted to the engine block. I would have thought a computer would not be so close to a big heat source. It seems modern computers aren’t as sensitive to heat as old ones.

[@hugobarbosa9012]

congratulations on the diagnosis, I'm Brazilian and I live in Miami. Where can I buy the worshipers you use in the multimeter? Yellow connectors that you stick inside the cables

[@truth4reel]

Awesome. Called possible bias voltage from the 3.9v right away. He should've come to you in the first place. Some people only give me the head scratchers and take the easy jobs to someone else.

[@hairolf4397]

Amazing work eric! Thats a really good point on the biased voltage & that is something that we need to keep in the back of our mind when troubleshooting. Salute to you sir!

[@BeneathBlueEyesMusic]

Man what a thorough job. Where are you located? I would 100% let you work on my Dodge RV.

[@randomugliness1238]

Amazing diag.. love the thinking outside the box to make sure you were q00 percent correct!

[@JoseAlvarado-hq6vl]

Eres todo un maestro Erick, mis saludos desde Petaluma California me encanta ver tus videos y gracias por cada video que ases para nosotros tus seguidores

[@fredsalter1915]

Another super useful case study, Eric!!! Thanks for posting for us to see!!!

[@alialix2076]

Good lessen for all of us Eric .. Good job man.

[@airratchetjockey7605]

Great diagnosis, wouldn’t be nice if manufacturers put out better service info.

[@jeremyah78]

I would have got caught on that for sure! Great lesson on bias voltage. May have just saved some guys, like me, a little future grief👍

[@billneu9520]

Great video you would make a great instructor Bill N LI NY Thanks for your time

[@Keepin-it-wheel101]

Amazing!!!! love your work and I always learn so much!!!

[@williamshultz3598]

Just found your channel. It's great.

[@samrugtiv3839]

Eric dam good job i bet they won't go back to that butcher shop again.thanks for the good video your friend sam

[@user-yw6ei8yt4q]

Like you say you may not know everything, but you ARE good.

[@thats.grantastic]

Awesome diagnostic! Great job.

[@chrismechanic2000]

you really are a great tech, but then again it does help if the fan is plugged in.

[@КовальОлександр-к6ь]

If I could to hit a Like for the second time, then I would ) Great explanantion: simple and fast.

[@angelramirez7747]

Amazing diagnosis!!

[@NeoAndersonReloaded]

Its hard to fix something when you rule out pasted repairs. Good job.

[@josemuratalla7674]

Damn nice work bro really educational 👍🏼 👌

[@franciscoxaviergonzalezrom4648]

What a video! I got a question for you when you grounded the circuit to eliminate the bias voltage, are you creating a short circuit? because when the circuit is shorted I saw 12 V of PWM or maybe I'm not sure what did you test.,,,, Nice diag bro!

[@ADVANCEDLEVELAUTO]

It's not technically a short circuit when it goes through the test light. The bias voltage is designed to be a very weak signal that can easily find ground through the component (i.e fan clutch) in the circuit. This is how the computer uses the bias voltage to verify if the component in the circuit is disconnected or there is an open in the circuit.

[@onemechca]

Brilliant as usual Eric..Thank's dude.

[@tcifusion4497]

NAILED IT ONCE MORE...THANK U FOR SHARING.......

[@j.gtheautotech8455]

Awesome video! I learned so much!!!!