[DMC5180]

My curiosity got the best of me and I may be paying the price. In anticipation for a possible radio upgrade, I removed the center stack panel today. I was very careful to gingerly disconnect all 6 harness connections on the back of the panel. When I was done examining and taking pictures, I carefully connected all connections making sure every connector clicked in place. I reinstalled the panel and lower shifter trim. When I power up the car the center screen is OFF. There is no visual indication of power to the display. I pull the out again and rechecked the connections and all appears good. Still NO screen. What did I do wrong? Is there some kind of serial data handshake that was disrupted when I removed the screen connections?

I'm at a loss


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[scrambler]

Hopefully you did not kill the HMI module
http://gm-volt.com/forum/showthread.php?275721-Dead-Center-console

 

[freshcut]

That's for the Gen 2, does the Gen 1 also have this same module? I'd suggest a hard reset of everything by pulling the 12V battery for a minute or so.

 

[DMC5180]

I'm trying to pull the negative cable terminal now, but it's not letting go. What's the secret? The nut is removed, the terminal is loose but I can't get it to let go of the post. Is there a special trick?

 

[freshcut]

I believe I pulled the positive side when I did mine. The left side when standing in front of the battery. I just loosened the nut and pulled it up and off the terminal.

 

[DMC5180]

Well, I finally got it to let go. Unfortunately, No joy on the reset. Still no screen power up. Meanwhile the driver screen works fine.

I fear I'm not going to here the end of it when I tell the wife what happened.


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[somms]

Ebay is ur friend!

I've had this touchscreen pulled out of my Gen1 about a half-dozen times w/o issue so you may just want to re-check those connections and fuses one last time.

Good thing the touchscreen isn't critical to the operation on your Volt and it would still be driveable even if removed completely!

 

[DMC5180]

Is there a fuse for just the screen? I have audio the XM is still playing fine. Just a black (no power) screen.


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[somms]

Is there a fuse for just the screen? I have audio the XM is still playing fine. Just a black (no power) screen.

Keep in mind your touchscreen should never be completely black when your Gen1 is turned on.
When working properly, you should still be able to see the faint glow of the backlight of the touchscreen even if you command the screen off using the voice command 'display off'...

 

[DMC5180]

Thanks for the information. Sadly the fuse checked out good. I also used the voice command to turn display ON. Even though it replied back "display set to ON" it did not come on. I've checked all the connections multiple times. Nothing I did should have caused this.

When you've had your screen out in the past, did you disconnect the battery first, Or just unplug things?

Does the screen require special programming to work with the radio or that just for the main radio itself?


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[freshcut]

As with anything electrical, always remove the power source. I know on mine, when I open the door, the screens (both) do turn the back light on indicating they're live. I would assume based on that observation that they are receiving power even with the vehicle powered off. I can only assume that the disconnecting and reconnecting was disagreeable to whatever module sends the signal to the screen.

The thought about doing a hard reset was in the hopes that it reset any possible protection circuitry that may have been built into the display system. Unfortunately it's starting to look like a potential trip to the service department might be in order.

I guess the next question might be if you have any functional touch screen operation. If you do, perhaps it may be as simple as a bad back light that may have been knocked out when connecting/disconnecting in which replacing the screen itself which might be cheap enough on Ebay.

I don't believe the screen itself needs special programming, however I do know if you replace the center stack with a different one (adding heated seats or nav) then that needs programming.

I definitely wish you luck both with the car and the wife.

 

[DMC5180]

thanks. No screen functions period. All center stack buttons work. The car is still under CPO 12 month B2B warranty. However, given the circumstances I think I'll try a different screen off EBay first. If that doesn't do it I'll take it in. Unfortunately, my servicing dealer is an hour drive away.


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[freshcut]

If there are no screen functions at all, I'd probably suggest the dealership first since I have my suspicions that a screen likely won't fix this. However, there is one on Ebay for $120 which I suppose you could try.

http://www.ebay.com/itm/11-12-13-14...ash=item237cf20cd0:g:A0QAAOSwZVlXrOij&vxp=mtr

 

[DMC5180]

I just bought one for $70 plus SH. That won't break the bank just to try it.


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[freshcut]

Even better! I just did a quick search, didn't feel like going through pages of cars and that was the first one I came across. Good luck and keep us posted.

 

[llninja]

I go by the rule, if it ain't broke, don't touch it. Plus, it's getting harder to justify putting in an aftermarket sound system as when you do so, you can't very well rip out the current center console as there's so much ev info and car configuration that can be done through the center console. Onstar, Bluetooth for streaming and phone, it's just too much to rip out so you can add a pioneer, blaupunkt, etc. to the car.

 

[DMC5180]

True, but I'm not looking at aftermarket different brand systems. Just a later model GM unit with today's features.


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[Prohidium]

Make sure you visually inspect the connectors to make sure there are no broken or bent pins. Also check for broken wires etc.

 

[DMC5180]

Most definitely will do that. I have a subscription to Alldatadiy for the car. I've located the connector pin out info but won't have access to the car again till Friday. By then I should have my USED replacement screen to try also.


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[flyingsherpa]

My radio recently failed, and I did several head unit swaps during troubleshooting, etc, so I pulled off that faceplate many times. But I left the (2?) screen harness attached and just rotated the faceplate to rest on the upper dash. I did disconnect all the others, of course. A few times during this process, the faceplate backlight stopped working, but would often work the next time I messed with it. My theory was that one of the wires/pins didn't seat perfectly after after messing with it, so I made sure to push the wires into the connectors next time I did it. Everything works fine now. So maybe you pulled one wire on the screen connectors just out slightly? Try to press the wires into the connector individually (or look for one that isn't fully seated). Did you take out the head unit too? If so, do the same to those harnesses, as the head unit is what tells the screen to turn on.