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Perplexing GMOS-044 and ASWC-1 issues. Any suggestions?

10148 Views 11 Replies 3 Participants Last post by  Livingfortheice
Hey everyone,

So i need help, desperately. I am about to lose my mind with these issues. First, the parts:
JVC KW-V41BT radio (With a microbypass = DVD in motion)
Axxess GMOS-044 harness
Axxess ASWC-1 SWC adapter

All connections are soldered and heat shrunk. I have redone the wiring 3 times now. Each time, I've cut all the connections, re-soldered them all to the appropriate corresponding wires, and shrunk them all again. I have used the ASWC adapter that was built into the GMOS and the other adapter that came with the ASWC and both had the same results.
Now to the issues::angry:

1. No SWC's. I used the Light blue/yellow wire from the JVC and connected it to the brown wire on the 3.5mm adapter per directions, and plugged it into the female adapter (these were per the directions from Axxess). Here is what happens - every time i start the car, the led rapidly flashed green and red for 10-20 seconds (never truly timed it). Then, 7 green blinks (showing the pink wire is connected), then 5 red blinks (showing I am using a JVC). BUT, finally, it flashes red/green (slower than when i turn the car on). I dont have any controls from the steering wheel EXCEPT the pick up/hang up buttons. This is where my second issue comes in

2. Hang-up/Pick-up buttons. These are the most perplexing. The pick up button, if held for 3 seconds, shuts off the radio, ASWC and GMOS. Then, I hold the hang up button for 3 seconds, and everything turns back on. This happens even when i don't have the ASWC module plugged it! I cannot turn on the stock LED screen, or control any of the volume keys.

3. Cannot manually program. Every time i start the car, the ASWC module goes through the same process that i described in the beginning of issue 1. I have tried holding the reset button, and it resets after i hold it for 2 or 10 seconds, then starts the same process of failing to autoprogram right away. I have tried to manually program multiple times, but it doesn't let me. I know people on here have successfully plug and played the adapters into the modules and everything worked. Do you think i have bad modules?

Does anyone have any ideas or troubleshooting ideas that i can try? I am desperate. I have tried called Axxess 3 times and am on hold forever with them, so they aren't helping with the situation. I know people here are very good with audio systems. I thought i was decent with them until this conundrum started happening. Very disheartening. If anyone has any, and i mean ANY suggestions, I would be GREATLY appreciated!!!!!:th_salute:

Thank you so much,
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I have the same setup as you with a JVC KW-V41BT, GMOS-044, and ASWC-1 SWC.

I'm just going on memory here:

1. I had to manually change the radio type to JVC using the procedure on page 12 of the manual. IIRC, it took 3-4 tries.

2. The pickup button will shut the radio off if a mute wire is not connected because it turns on the OnStar prompt. JVC / Kenwood head units don't have a mute wire, so don't even bother with the pickup button. The SW pickup button will ALWAYS activate OnStar. Already called Metra about this, it's hard coded in GM vehicles, and cannot be reprogrammed to BT phone pickup. Annoying, but just use the touch screen or voice dial on the head unit.

I assume that you connected the ASWC-1 as described on page 7, section C of the manual? (blue / yellow wire from head unit to brown wire of 3.5mm adapter)
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I remember now when I switched from a Clarion to JVC head unit, the ASWC-1 would not auto program, so I had to go through this procedure for manual programming. However, this part of the manual was not written very well, or it didn't work exactly as described with the LED's going solid and such.

Press and hold the volume down for 3 seconds after turning key on
Press and hold the volume up 5 times (JVC is code 5)
Press and hold the volume down to store the code

Again, as I recall, the LED's on the ASWC-1 did not illuminate as described in the manual when doing this, so I had to do it a few times blindly before it worked correctly. Once it is working, it works really well. Only issues I have is the SW pickup / OnStar stupidity, and the display above radio will sometimes randomly switch over to date and time settings for no reason (I keep forgetting to call Metra about this).
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Well, there's this tidbit from an Amazon review of the GMOS-44.

To be honest I'm half way happy with this interface. You have to buy a second interface to keep your steering wheel controls and I lost the mute (it doesn't mute my stereo) anyways from my steering wheel, if you have a usb and an aux input on your car from factory you will loose that too. This interface doesn't communicate with your car and stereo to give you your car's info like other interfaces do (this is only if your stereo has that option, mine it's a double din and it has that feature). I like the fact that I don't have to cut wires to install this interface.
I bought this unit to install a Pioneer double din stereo in a 2012 chevy cruze. I had the issue where the factory dash screen of the car would not display nothing at all. I called Axxess support and all they said was that It was a bad unit. I returned the unit and the seller send me a second one that did the same thing as the first one. Everything comes to this, I called Metra support and at the end was one of the pins of the big harness that connects to the car got bent somehow. They are very susceptible to that. Make sure all the pins are straight and that when you plug in your interface do it very slow and carefully. This harness will go deeper than the factory connector on the factory deck. If it's not all the way in almost all the features in the car will still work so make sure that all pins are straight and fully inserted.
I knew when I did this retrofit that it might be iffy, but the factory non-MyLink radio system plain sucks at everything, whereas aftermarket head units can do any kind of infotainment needed depending on how much you want to spend.. As such, I bought the stuff from Crutchfield because they do have excellent customer service if you need help, or just want to bail out and return for refund.
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