Oh, dang. A Chevy Traverse. Dump that crap fast. My brother-in-law has a friend that use to work on those all day long at a Chevy dealer. He was low man for 2-3 years and so they stuck him with all the "fun" jobs. He can't even remember how many transmissions on less than 3 year old Traverses he replaced. He quit that job and is now working for a heavy equipment place and is much happier. He's dang good at Cummins engine work as well.
Keith, I know you know this. You are so appreciated. Really enjoy watching your videos. Better than anything on cable tv. Bless you and your family. Have a good night.
I dont have those problems with my 78 3/4 ton chevy...lol...a true pleasure 2 watch you work..thank you. I hate new cars,how silly is that to keep your car from starting . Just another way to get in your wallet..
Sir, our 2015 is at the dealer currently with the exact symptoms as in the video. The dealer has called me twice today, and asked what I saw and did...Service writer stated they dont have communication with the ECU and are calling GM for advice...Tire air system low light indicator on, Air bag Service light on, key fog doesnt work, dash lights out, no volts shown on the gauge, when turning the key to on/start... Thank you for being a true professional in the industry!!
Real fine system automakers have created. And everyone wonders why I love cars built before 1996 ... This was GREAT, Keith! Learned alot on this one. It really isn't as complicated as my mind makes it out to be, once you isolate and test each leg like you did. Of course, the right tools make all the difference too - I'm still working on that part of it. 😊 LOVED the vid - THANK YOU!👍
Everything u put out is fun. Holy jesus that takes real skills. Thanx Keith. So that otc one u like better because of the LEDs? So get that one better than the aeswave u suggest? Is it cheaper? Thank u
This makes it clear why Honda/Acura for example use a F-CAN network for their powertrain, drivetrain, brake/abs modules for fast bus-data and a separate B-CAN network for the rest of the body related modules; hvac, audio, door locks, windows, seats etc. Wait why am I comparing GM to Honda
Just ran into this today I was dumb founded and was about to send it to the dealership. I used this as a reference point following your step with a multimeter and found the climate control also was the issue. No start,no communication,no radio,no hvac,no gauges working intermittently, and inop key fob. Thanks for the info sure was a lot of help.
@@NewLevelAuto What did you find out what the problem was my 2016 no crank no start replaced starter and alternator no luck any help would be appreciated ty
That's the problem with today's cars. I know they are trying to save wires. But a HVAC module shouldn't stop the car from starting. Didn't think the low speed LAN would keep the car from starting, only the high speed. Thanks for making this informative video.
Don't go into this without a wiring diagram he says :-) . The most important thing here by fair your brain. Thank you for letting us in on how it works .
I love videos like this. You are excellent at what you do. A friend of mine called me on an 08 Acadia that I cant communicate with the engine ecm or hatch module. Has loss of communication codes stored. I bought a pico scope and want to use it. You have had multiple videos using that GM low CAN plug with the jumper connector. I think that is super useful to know to "separate" the circuits and narrow down a problem. I understand why your stuff is quick and to the point but man it would be awesome to learn it all. Then again i know experience is key. I work on heavy construction equipment and not automotive so seeing you and select others on RU-vid helps a lot.
Nice work Keith im just at an awwwwww ...this just blew me away doctor i am going to watch this several more times so i can catch up...lol.. Thank u man
Well that was just bloody brilliant, yes wiring diagrams are needed but, that was impressive, Its just your total understanding of the systems your working on, that's so awesome when I watch you working. if theirs no one about, just give yourself a pat on the back from me, cheers buddy and thanks again for sharing excellent video
Great demonstration of the process you go through, and how you decide to choose 1 route over another. It's certainly enlightening to watch. I can't wait to utilize all this new knowledge on cases. It's not too often I come across this intricate of a diag.
Keith you never cease to amaze.me. I gotta tell ya, you make it look so easy. If I had all the toys you have in your toybox, I might eventually fiigure it out but the customer probably would want their car back within a couple of months.
Good video Keith! The OTC BOB works great with the flashing LED's. Makes it easier to see if you have com on a network. Splice packs cut diag time down as well.Especially when they are at an easy access point.
i had one of these last spring that was the issue, ended up finding that the terminal next to the data line is either power or ground and had bad contact melting the connector causing the fault. had to get a new module then build a new connector since a pig tail isn't available
THIS CAN BE ONE OF THE SCARIEST SCENARIOS TO BUCK INTO ON A LATE MODEL CHEVY , BECAUSE THERE CAN BE SO MANY THINGS ALONE JUST ON THE NETWORK INTERACTIONS AND THERE IS NOT EVEN SOMETHING TO TRULY POINT YOU IN THE RIGHT DIRECTION THERE IS NO TEXTBOOK SILVER BULLET FIX OUT THERE I KNOW OF BECAUSE IT CAN GO SO MANY DIFFERENT WAYS . THAT IS WHY..., THAT FIRST INITIAL STEP IS SO VERY IMPORTANT KEITH YOU MUST HAVE LIBRARIES OF EXPERIENCES TO BE ABLE TO ZERO IN ON THIS ANOMALY AS QUICK AS YOU DO . YES AND WHAT IS THE TRUE SECRET TO REACHING THESE UNFATHOMABLE HEIGHTS PLEASE PLEASE DO TELL ? ? ?
Thanks for sharing the great video Keith. It's always great to see the way you pick the systems apart and make it easier to understand. I've been thinking about getting the OTC BOB since I don't have one yet
Thank God they at least give you an accessible splice pack :) Imagine telling the customer "your HVAC module was causing a no-start"...wow. Beautiful diagnosis Keith!
Great video sir, I'm working on a 2014 gmc traverse. No start only module not communicating is the immobilizer control module. I picked up a used one plugged it in and still nothing. Took it to the bench and desoldered the eeprom 95040 and transferred to donor. Still no comms. I have comms with everything else in the vehicle.
The stuck-in-the-past people will complain about how it's possible for the HVAC to cause a no-start, when their Ford Model-T didn't have this problem, it does however make perfect sense from a technical standpoint in relation to how things are necessarily networked on modern cars. What does not make sense however, is why a bad module is able to short the network data line to supply voltage. Any reasonable network transceiver should be designed to fail open circuit, and should have opto, or even better magnetic isolation. The fact this module can fail short circuit on the data bus is just pure crappy/lazy/cost saving, poor engineering, in this case you can't help buy hate GM for being deliberately irresponsible, when an extra 10cents spent could avoid this situation entirely.
Is this similar to VW and their K line? I have a 2004 Touareg with zero activity on the CAN lines and I'm now reading that it actually uses the K line for comms and not really CAN. The CAN lines from DLC connector to Instrument cluster (gateway) actually shows infinite resistance and I called a cluster because of that, no shorts of opens in the lines. 60 ohms on the CAN line coming out of the cluster but no activity. It's almost the exact same symptoms as this. I already unplugged all modules apart from airbag and HVAC which I need a special tool for. Powers and grounds are good.
Just watched this video again Keith like you told me. One question though why is there no activity on pin 2 that goes to the other splice pack. With all the modules that are on it I wouldn't expect a zero flatline.
hey im trying to diagnosse a u0073 on a 07 equinox i have communication with the low speed modules nothing on the high speed side ive checked resistance in 6 and 14 getting a 5.27 mega ohms no crank no start trying to figure out how to gain communication again any help you be greatly appreciated its been driving me nuts! thank you so much !
How does the scan tool communicate with the radio, for example, when you have the junction connector jumper removed? Doesn't that isolate all the modules?
Thats was an awesome video keith. My question to u is. I have a shop behind my house with 3 bays just 1 lift right now and im doing quite a bit of automotive stuff on the side of my full time job. I have been using all data diy up to this point when i need diagrams but i would love to get your view on info platforms. If u had to have 1 in my type of situation where diag is obviosly a part of what i do but also lots of repairs. Rusty ones cause up in northern ny utica area. Lol. Just wanted your valued opinion on what would be the best for my money
id have guessed one of the doors and checked them first :) yeehaw. let me further guess, customers swears nothing happened, but failed to mention a giant coffee or soda pouring into the hvac controls :))
