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

  • @meganhazen3978
    @meganhazen3978 Жыл бұрын

    You’re videos are very informative 😊love them keep them coming ❤!

  • @GroundedDiagnostics
    @GroundedDiagnostics Жыл бұрын

    Never seen anything like this. Fascinating stuff.

  • @DependableAutoTruck
    @DependableAutoTruck Жыл бұрын

    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

  • @bradz5202
    @bradz5202 Жыл бұрын

    New to your channel. Great job keep up the good work!

  • @Sergio09354
    @Sergio09354 Жыл бұрын

    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.

  • @rookiediagnosticsandrepair5956
    @rookiediagnosticsandrepair5956 Жыл бұрын

    That is some sci-fi stuff! MOST signal does not look digital at all. Very well presented.

  • @bennie1634
    @bennie1634 Жыл бұрын

    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

    @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.

  • @germ294
    @germ294 Жыл бұрын

    Man, you are legit. I really appreciate you sharing your experiences in automotive repair. You rock!

  • @josedejesusvelazquez6863
    @josedejesusvelazquez6863 Жыл бұрын

    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”.

  • @15066bas
    @15066bas Жыл бұрын

    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.

  • @JBlake-moon-shdo
    @JBlake-moon-shdo Жыл бұрын

    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

    @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.

  • @PineHollowAutoDiagnostics
    @PineHollowAutoDiagnostics Жыл бұрын

    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?

  • @abztvbaxley8457
    @abztvbaxley845711 ай бұрын

    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?

  • @jimnoll7728
    @jimnoll77289 ай бұрын

    I had my radio not working right an did you just turn off the radio over night it fixed mine 2015 chevy

  • @EATSLEEPFARM
    @EATSLEEPFARM Жыл бұрын

    Are you in KY or TN?

  • @advancedleveldiagnostics
    @advancedleveldiagnostics Жыл бұрын

    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

    @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.

  • @durranibrothers8315
    @durranibrothers83157 ай бұрын

    Hello sir I have same problem but I dnt know what’s problem

  • @rogertarrant4331
    @rogertarrant4331 Жыл бұрын

    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

    @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

  • @bas2876
    @bas2876 Жыл бұрын

    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

    @bas2876

    Жыл бұрын

    Thanks,did'nt know that,I'm used to the eurostyle optical fiber system.

  • @brandonnguyen9421
    @brandonnguyen9421 Жыл бұрын

    What if the radio screen is completely dead and the info screen on your speedo says audio off??

  • @brandonnguyen9421

    @brandonnguyen9421

    Жыл бұрын

    @@autodiagyt would you say most likely HMI module?

  • @RentalCarsandYallCousins

    @RentalCarsandYallCousins

    9 ай бұрын

    I have that issue. Did you get it figured out?

  • @reanacook8504

    @reanacook8504

    14 күн бұрын

    Dealing with the same problem. Did you get it figured out?

  • @jeffsnider3588
    @jeffsnider35883 ай бұрын

    As a retired Engineer this system seems over complicated, so are dealer technicians trained to perform diagnosis like this.

  • @ericflores5748
    @ericflores5748 Жыл бұрын

    Did you were able to fix the problem

  • @ericflores5748

    @ericflores5748

    Жыл бұрын

    @@autodiagyt can you share the part number 🙏

  • @martincuevas9193
    @martincuevas91933 ай бұрын

    2016 push start?

  • @autodiagyt

    @autodiagyt

    3 ай бұрын

    Yes you can have a 2016 with push start.

  • @adelalshammary109
    @adelalshammary109 Жыл бұрын

    Love auction cars

  • @josedejesusvelazquez6863
    @josedejesusvelazquez6863 Жыл бұрын

    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 👍👍👍

  • @marshall1157
    @marshall115711 ай бұрын

    They need to go back to a single entertainment UNIT.

  • @JBlake-moon-shdo
    @JBlake-moon-shdo Жыл бұрын

    Those were typical audio sinusoidal wave forms probably one for each channel "2" stereo. 👍

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