Come along with Eric O. at the South Main Auto shop as he takes a look this 2002 Chevrolet 3500 with a 6.6 Duramax Diesel. The vehicle came in with an engine light and a code P0540 " Intake Air Heater Incorrect Voltage".
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--Eric O.
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South Main Auto Repair
47 S. Main St
PO Box 471
Avoca, NY 14809
Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not South Main Auto Repair.
Be sure and check out the all new "Outdoor w/ Eric O. Channel" too! https://www.youtube.com/channel/UC8PwOuadwwI-G2oLRXn3sMA
Interested in stuff seen in the videos or the tools and toys Eric O. likes and uses? Check out the **ALL NEW** SMA A-Store and help support the channel! : http://astore.amazon.com/httpswwwy0837-20
If an SMA Video has helped you out please consider giving using the "support" link on our YouTube home page. The videos take real time to create and pull us away from real work that pays our bills.
THANKS!
--Eric O.
WANT AN "SMA" STICKER OF YOUR OWN!?!
Simply send and E-mail to SMAstickers @outlook.com including: your shipping address and e-mail address in the text, I in turn will send you a paypal invoice for $5 each USA or $6 each international. Let me know how many you want and as soon as the paypal invoice is paid I will ship them out ASAP! Thanks for your support of our channel!!
--Eric & Vanessa O.
Feel like sending some swag to SMA because you love the videos but don't know where to send it?
Just ship it here:
South Main Auto Repair
47 S. Main St
PO Box 471
Avoca, NY 14809
Disclaimer:
Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not South Main Auto Repair.
I have same issue on volvo vnl truck. Are able share that schematic? Thanks for the video.
Well if Ivan would take lessons he might not have so many come backs
climbed up on that truck 60 times for the video – thanks Mr O
So I’m getting a air intake heater code/plug code. Should I just replace the relays ? I’m thinking that’s the issue.
There was an ad every two minutes in this….
I think I'll just get a gas can and light my piece of shit gmc with all this bull crap ass problems and never buy another new vehicle again, I'll bring back to life my 70' chevy with a newer drive train..
Thanks, that help me alot
that's why chrysler did away with those burdensome relays and went with trouble free tipm's😉
Hallo Eric , the things that caut my eye was that when u graund the relay whit the test light the test light did not became deem , thank you from isreal , great content
Does anyone know the model number of the AUTEL scan tool being used???
An excellent example of logical, thoughtful diagnostic procedure 👍👍👍. Well done sir!
I’m on a personal crusade in regard to heater delete, and below have copied a rant I have posted elsewhere. One question that remains is when does the heater operate? I’m guessing it is independent of glow plugs. Just watched the rest of the video and you said “below 73F”, but for how long?
Also, you should consider one of those “over the engine, reclining creepers.” 😀
********
As an engineer myself, I must question mods or deletes on an engine which override the original intentions and motivations of fellow engineers who undoubtedly spent considerable time and effort designing various aspects of our Duramax engines. As we all know, economics of every aspect of vehicle design are an important part of decision making and unless a part is mandated by emissions regulations, I doubt anything is ever added without considerable research into the pros and cons. While I concede the heater coil no doubt causes some degree of intake restriction and turbulence, I’m confident those downsides were on the con side of the ledger, but were overridden by the benefits of better warmup characteristics during cold weather starts. Frankly, I don’t know at what ambient the heater is energized, but would be willing to bet there are benefits to warmer intake air, which may be transparent to the operator, but nonetheless contribute to better engine operating characteristics during that phase of operation.
I also suspect that, short of dyno testing, there is little noticeable performance difference following removal of the heater, and even then, improvement is only at the margins.
If anyone has numbers to refute my observations, I’d luv to see them.
Delete on, homey and thanks for this otherwise well produced video. 👍
Excellent video Eric!!! The best I've seen so far!!!
Nice!! Tricky… 🙂
Both of the relays were bad… 40 ohms on the glow plug coil and 1 ohm on the intake heater coil. Obviously, diesel vibration takes it's toll on those relays, eventually. Good catch Eric!
What is the model of Autel are you using? Like to have the same documents.
Nice demo Eric, was that serpentine belt manufactured on St Patrick's Day ? Nice to see how the circuits function with the control modules. Seems to me like many "computer" vehicles come in for problems that a non-computer vehicle would never come in for meaning, seems like the newer vintage has problems of their own which generate more maintenance vs. the old. Computer run vehicles are a dream if they work correctly however, if there's a failure while on the road, there's likely no roadside fix going to take place so it's flatbed time to a garage that is local to the breakdown location which is totally risky from my experience. Sounded like the lunch siren went off and Eric continued working as usual. Reminds me of the film, My Cousin Vinny, the local factory steam whistle at 5 AM, "to tell everyone its time to get up".
Hey that intake heater controller module near the fire wall on the gmc I'm trying to figure out where the ground white goes too i hooked all three wires right but I out have a black wire left which is the 4th black wire I forgot where it bolts too it's an 2003 gmc 6.6 diesel 2500 I did the injectors
My glow plugs arent seeing voltage on ignition either
My module only has one relay….. help
Had to watch on mute with the constant lip smacking….STOP IT!!!!!!!!!!
Man I wish I understood electrical half as much as you do
Great Video. I've never seen a small relay do that, perhaps moisture or something got in there and did something to the insulation on the relay coil? Just thinking.
Thanks Eric.
Love the afternoon blast!
The Nova was super nice. A labor of love considering the money involved. Great body work. Fun day in the shop. Thanks for the video.
Shorted coil in one of the relays, nice catch
Im just wondering I have asked all over and no one can give me a answer ive got a 2002 duramax with the 5 speed Allison and when I got to allerate it seems like it hesitates and blows a haze of black smoke I don't know if its the motor or the transmission. The transmission doesn't smell burn really there is a little but the color is still red. I would almost drescribe it as a sluggish take off. It does not smoke anytime else other than alleration.
So what was the actual fix? Get 2 new relays inside the block?
New subscriber here, great video. My 02 Duramax is now throwing the same exact code. What's the OEM part number for that relay box? Thanks!
Excellent, oh that resistance. Thanks Eric…
Good catch
my goodness gracious can somebody have a little consideration because I tried to make my Youtube video!! Noise, noise, noise!!!
LOL 😂!!!
My 2005 Chevy Silverado LT won't start unless the driver's door is opened and closed. I have a video on my channel, please help!
Great video and explanation, demonstration. As usual.
I think the big lesson is verifying the fix, using the ECM's output controls.
Having written GM Powertrain diagnostics for 25 years, that is the last step we put in.
OEM diagnostics are written for a tech/mechanic that does not have Eric's experience & skills. Therefore, they can be lengthy; however they are developed, tested, and verified on production vehicles – for all known faults that will set a DTC or cause a symptom.
That relay was kind of like a sci-fi situation. Did you get a chance to autopsy the old relay and find the contacts worn or dirty? What was causing the resistance issue?
Amazing
Hey man just wandering what do you use for all of your electrical diagrams and competent diagrams?
OEM parts only way to go great vid mate
That one would have thrown me for a loop for sure. Good call E.O.!
Hi Eric, just a quick question if you don't mind, on a Diesel engine do they have EGR flow at idle? Thanks Jonathan
Do you think th autel scanner is good? What do you think
$200 relay holder.. what a racket.
what type of scaner are you using on this video
Great video! Something that could have been easily misdiagnosed!
Btw, why did you use the Vantage instead of the Verus? Just curious.
I always look forward to seeing your videos. Thank you so much.
Eric O. what do you mean or what does it mean when you say CONTROL SIDE and why is it the CONTROL SIDE.
Man that was some trying conditions with the interruptions!!
Great informative video Dr.O
Do you have any SMA shirts out. I didn't see any thing on Amazon store. I'm up here I Calgary ab and would possibly like to order a shirt
By the way! When are the SMA shirts coming out for us pee ons??