Radio Screen keeps going off in this 2016 Tahoe and setting MOST Bus Faults
Автокөліктер мен көлік құралдары
The MOST Bus is what carries all the information from module to module in the radio system of newer GM vehicles. It's designed in a way that even the slightest fault with the information can lead to very strange looking issues as you can see here with the touchscreen turning on and off.
Пікірлер: 37
You’re videos are very informative 😊love them keep them coming ❤!
Never seen anything like this. Fascinating stuff.
great video haven't watched many of your videos just found the channel short time ago but wanted to tell you so far great content really like how you explain kinda reminds me of Ivan at PHAD
New to your channel. Great job keep up the good work!
Hello new subscriber here. i don't comment much but i always watch your videos. this one is excellent explaining the way to test it thanx for sharing your wisdom. keep up the good work.
That is some sci-fi stuff! MOST signal does not look digital at all. Very well presented.
Well , I know that the dataspeed of the MOST is at 50Mbps , so hundred times the speed of a high speed GMLAN ,so not easy to catch the signal on a scope . Enjoyed your approach to this problem and watching the rest of your videos . Keep up the good work !!
@russellhltn1396
Жыл бұрын
There's also a MOST150. But it looks like the Automotive Picosope only goes to 20MHz. I just glanced at the specs, but this seems to be closer to Eithernet than to what's normally in an automotive system. The Pico may be a bit out of it's league here.
Man, you are legit. I really appreciate you sharing your experiences in automotive repair. You rock!
PD. - I forgot to mentioning that if you, set this link in quotation marks in your bowser and there you will find very valuable information on this topic “MOST bus with a Ring break GM”.
When there is a break, a new surrogate is assigned, in this case no3 the amp. That means break is the module ahead of the new surrogate being the HMI.
Lol. Jake that is a very typical audio signal your looking at. Unplug any speaker hook the pico to it and you will see the same wave form. You may notice it changes to the sound. Great video.
@Discretesignals
4 ай бұрын
I wondering if the sample rate of his scope is set too low and its aliasing the signal. I'd crank the rate up as high as it would go and see what the waveform looks like. Most bus has a high baud rate, so you need a fast scope to see it.
Great info and troubleshooting process! This is cutting edge stuff here, learning a lot. Could someone diagnose this system without having the special Bosch MOST kit?
Hey my screen on my 2019 gmc Yukon want go down after you open it to get to the compartment behind the screen. It’s like it’s got something blocking it from going back down. Any idea what that kind be?
I had my radio not working right an did you just turn off the radio over night it fixed mine 2015 chevy
Are you in KY or TN?
Excellent information Thanks! Are you a Gm dealer tech? Did you put a scope on the other car to see if it's the same, really don't want to buy that tool?
@advancedleveldiagnostics
Жыл бұрын
@@autodiagyt Thank you, I just looked up the tool it's not as much as I thought it would be. maybe I'll buy myself a present.
Hello sir I have same problem but I dnt know what’s problem
My 2016 Silverado 2500HD is having the exact same issue right now. I bought an aftermarket stereo that allows me to keep the factory Bose setup and the screen works but has no sound.
@rogertarrant4331
Жыл бұрын
How do you bypass the HMI to get the speakers to work? I just want to do it to make sure that is my issue
Question:Always thought Most is an optical bus like glassfiber, how did you scope that then? , but mayby I'm wrong. Great video by the way!
@bas2876
Жыл бұрын
Thanks,did'nt know that,I'm used to the eurostyle optical fiber system.
What if the radio screen is completely dead and the info screen on your speedo says audio off??
@brandonnguyen9421
Жыл бұрын
@@autodiagyt would you say most likely HMI module?
@RentalCarsandYallCousins
9 ай бұрын
I have that issue. Did you get it figured out?
@reanacook8504
14 күн бұрын
Dealing with the same problem. Did you get it figured out?
As a retired Engineer this system seems over complicated, so are dealer technicians trained to perform diagnosis like this.
Did you were able to fix the problem
@ericflores5748
Жыл бұрын
@@autodiagyt can you share the part number 🙏
2016 push start?
@autodiagyt
3 ай бұрын
Yes you can have a 2016 with push start.
Love auction cars
Hi Dear Friend, I really like your videos and I also enjoy them a lot and study them too, but it is very difficult to do this because I have to put the audio at the highest level (100%). This causes that when the KZread commercial comes on, my eardrums burst. Hopefully you can remedy the situation. Thank you and receive a big greeting from Tijuana. 🇲🇽 Mexico 👍👍👍
They need to go back to a single entertainment UNIT.
Those were typical audio sinusoidal wave forms probably one for each channel "2" stereo. 👍