So when you turn the volume up, the sound level decreases? Or does the sound level go up, but the numbers on the screen go down. Could it be a setting similar to reversing the image on a camera?

 

Press volume up. The volume decreases and the on-screen slider also decreases. Inverse happens for pressing volume down.

Turn the knob to the right, as you do for volume up. The volume decreases and the on-screen slider also decreases. Inverse happens when turning to the left.

If I use only the system UI, the volume works as expected. It is only the physical controls having an issue

 

Is it set for Right Hand Drive? Maybe you can change it to Left Hand in the factory settings.

 

Nah it is set to right. That wouldn't invert the volume though. Or, I'd hope not. Stranger things have happened.

 

Have you tried to do factory reset for the stereo? Or maybe reprogramming the steering wheel controls? It sounds like it’s a software glitch of some type. If you haven’t tried reprogramming the buttons, I would try that first because it’s simple to do. If that doesn’t do it, then I’d go into the settings, and reset the stereo, but you will lose your settings, like EQ curves and radio station presets.

On my Android deck, I was able to unlock the developer options via the hidden menus, for anyone techy out there that knows wants to explore more.

 

Haven't been able to program the buttons at all. The volume worked out of the box. The others haven't taken to the programming app.

 

On my Android( I’m fairly new to these Androids being an Apple user )I have to save the settings at the end after programming the steering wheel functions, or else nothing will be saved. So make sure to press “save settings” if you see it on your screen.

I’m also starting to wonder then if you’re Canbus is set to the wrong vehicle? The canbus settings can be accessed in the hidden menu on mine, I imagine its will be the same on yours. If you can get to it, be sure it’s set to your vehicle type. Maybe that will solve this?

It’s quite an adventure figuring out these decks since support is basically nil on certain brands. But for the price I paid, it well worth it for me! In the past, I’ve spent more on a set of tweeters than this deck and its accessories, and I love it.

 

Canbus is set to correct vehicle I've tried Hi and Low whatever that means.
I have heard stories about wires being crossed on the harnesses from factory, but I don't have the knowledge or patience to track down which one goes where.
It does work so I guess things could be worse

 

I read something about a “peptide” setting in one of the menus, I’m guessing in the canbus, which switches the car from RHD to LHD, and that seems to affect some of the electronic controls and functions. That’s another option to try.

 

Can't say that I've noticed that setting anywhere, but worth a look. The volume keys should be the same no matter which side the driver's seat is, but can't hurt to try.

 

it's been years, but i remember there was a menu in the android setup where you "teach" what each button on your steering wheel does. can't remember how you get there though. if you didn't have to go through that setup process it may have been pre-set (wrong) from the factory. i had a lot of issues with the ebay seller sending the wrong harnesses twice, but he was a great help setting it up. might want to reach out to your seller.

 

Yeah. I've played around with it. I'm thinking my canbus isn't communicating with the head unit properly. The buttons aren't programming along with sensor data from the truck not showing up on screen.

 

Great Scott, I figured it out!

System settings ➡
Setting guide ➡
Volume setting ❎
Protocol reverse ✅

I still don't get any sensor info from the car into the unit, but the volume buttons work properly now. I'll take the small victories.

 

You need to program the actions on the steering wheel buttons. There is an app in yhe Android unit for that. Not sure if a code is required. In my unit, not a 15", you have an option to configure it using higher low impedance. Also to configure it for short or long press