I only had this head unit installed for less than 5 days.I bought it brand new from an authorized Pioneer dealer. I never hacked it, or anything. I used the Metra Mito-2 harness in order to retain the factory Rockford Fosgate system.

Car: 2010 Mitsubishi Lancer

Harness: Metra Mito-2

It was working flawlessly for the 1st 3 days, then out of the blue the ATT function pops up on the top right corner of the screen and kills the volume. I have a factory hands free, but it isnt hooked up to any phone. A few hours later I get into the car, start her up and the stereo works fine (no ATT). A few minutes listening to the stereo, the ATT functioning pops up again (flickering) and then moments later stays on.

Someone H E L P !!!

That's a weird one for me....

Do you have any steering wheel controls hooked up?

Like most electronics....they often just need a reboot... I would try to do a full reset.... especially, if they never did one after the install..

Sorry for the less than intelligent answer... but I would definitely try a reset first...

Is it possible the cell mute wire could be loose back there?

If you have a factory hands free connected to the unit you should remove it. This unit has BT built in. It is likely the problem is caused by the factory BT.

It definitely doesnt need a reboot. I went through a thorough examination of the unit with the help of the tech people over at Pioneer (including resetting all the features). That didnt help..

There are no loose wires/connections. I triple checked..

Are you sure that the factory BT will cause this problem? Because even though I never disconnected the factory BT, I never used it since I never connected any cell phone to it..

I don't know it sounded like you had it connected to the unit somehow. If you do, disconnect it.

I don't know it sounded like you had it connected to the unit somehow. If you do, disconnect it.

The factory BT is wired into the main harness before the Metra harness. I can physically remove the factory BT, although I want to make sure that its causing the ATT malfunction 1st. It would be a shame to lose the factory BT, if it wasnt the source of the problem.

Well disconnect it and see if the problem goes away.

I actually have this same problem, I plan on tearing down the install later this week. I wanted to disconnect the Mute wire from the Axxes interface I am using for Onstar. The ATT looks to be a function for the mute wire. Question I have for you is do you currently have the mute wire connected to anything?

ATT has nothing to do with that wire. However, that wire if connected to something may be causing the ATT to engage.

I have my mute wire connected to the Axxes GMOS-Lan-02 (brown wire from Axxess to Mute Wire on Avic). The Axxess is designed to allow me to replace my factory stereo and retain my factory chimes, Onstar, and bose amplified speakers. When I press the button to start an Onstar request or function the radio ATTenuates the sources volume to reduce audio dramatically allowing you to focus on the Onstar function. I think when the Onstar is engaged the Axxess sends a signal to the Avic to apply ATT. Once the feature is terminated the regular volume comes back on. Either a faulty Axxess unit is sending a signal to the Avic's mute wire causing it to intermittently go into ATT mode or a faulty unit? I don't use Onstar that often so my plan is to just disconnect the Axxess brown wire from the Avic's Mute wire. Hopefully this test will shine more light. The expected behavior is the intermittent ATT will stop and if I utilize the Onstar feature I would need to manually put the source audio volume to low. I am using a common ground for both the SWI-PS, AXXESS, and AVIC but everything does appear to work so I doubt it weighs any impact on the issue. The last time I had this behavior was last week, but I am sure it will repeat itself.

I had to edit my response to add more, after reading the Operation Manual on pg. 161 it states "the navigation system will mute or attenuate the audio source volume when the signal is output via MUTE

lead. So certainly the wire can cause the reported behavior. I would suggest checking what is connected to the mute wire, if it is nothing I would tape it up real good to avoid it touching the chassis or other exposed wires.

I'm having the same issue. Has anyone nailed the problem down yet?

I have the same problem. I fixed it by removing the Axxess Metra from the F90BT HU. I think it may be due to a broken Axxess unit?

So as mentioned in the past post, I have had the same problem. The only thing different about whats going on with yours is, I have replaced the harness twice, and then removed the mute wire from the 3rd harness. Also I don't have a blue-tooth device so there is nothing connect on that end. I haven't used OnStar since 2005 which is way before this head unit was even invented. I have swapped the head unit out twice and also swapped out the steering wheel control module twice and not running it at all on the third unit and still it goes into ATT or Mute depending on which one I have selected (-20db or -10db or Mute) it seem like it has to be a heat issue that is causing it to go into what is apparently a protect mode ie Mute or ATT. Does anyone know how to get into the service menu to adjust the internal fan speed and fan turn on temp? I wonder if Pioneer knows about this apparent issue. Please send me any ideas or info......

all of those with the problem, check to see if your mute wire is getting pinched or grounded out somewhere, if you have moved your mute wire for the bypass, then this is not your problem.

Are you using a steering wheel interface module? If so try to unplug it at the navi's wire remote input plug (3.5 MM)and see if "ATT" disappears for good. If i remember correctly a Pioneer made a marine remote controller that had a "ATT Button" on it. Possible the steering wheel interface module maybe causing the intermittent ATT issue to appear on your display thur wire remote input of the navi.

i have the same issue. i am on interface #3 (gmos-04). the first two were used, so i'll cut metra some slack. i'm installing today and will report back.

if the issue keeps coming back, then i will snip the brown mute wire (i'm not using it for bypass). if the problem still continues, then it's actually the unit going into ATT on its own and not from a mute signal.

Is it possible the cell mute wire could be loose back there?

Yea check the mute. I had this problem while testing before putting it into the dash.

brand spanking new gmos-04 build date 5/??/11. avic-z130bt wires were cut from the old harness and soldered to the new one. worked fine for about 5 mins and then the problem returned. i believe that it is the gmos-04 muting the avic and not the avic muting by itself (i.e. for thermal reasons).

it got dark so i had to quit for the day. tomorrow i'm chopping the mute wire. i'll report back.

brand spanking new gmos-04 build date 5/??/11. avic-z130bt wires were cut from the old harness and soldered to the new one. worked fine for about 5 mins and then the problem returned. i believe that it is the gmos-04 muting the avic and not the avic muting by itself (i.e. for thermal reasons).

 

it got dark so i had to quit for the day. tomorrow i'm chopping the mute wire. i'll report back.

I was having the same problem. Do you have the bose system? Make sure you are hooked up to the amp

I was having the same problem. Do you have the bose system? Make sure you are hooked up to the amp

i have the bose system and all wiring is correct

here's a video that shows the issue and 5 mins later issue stops:

http://www.youtube.com/user/franknitty69#p/a/u/0/DlR9B7f7r5s

i have verified that it is indeed the GMOS-04 attenuating the AVIC-Z130. Today i turned the car on and proceeded to remove the dash on the escalade. After about 3 minutes the avic started attenuating.

after i removed the dash i unplugged the mute wire (i used bullet connectors for this wire because of this problem) and voila, the avic stopped attenuating.

i have not used other metra interfaces but after all of this trial and error i can say if you do use the Metra GMOS-04 with any radio keep the following in mind:

• Do not connect the mute wire to your radio's harness. Your radio will intermittently attenuate or mute
• The illumination wire does not work. The dimmer wire will dim only. It cannot be used for radio's that is expecting 0 Volts (lights off) or 12 Volts (lights on). This is not an issue with the interface, but a limitation of the vehicle (PAC has the same the problem). If you want the light, you must wire it elsewhere.
• For radios that output more than 2v on the RCA's you must adjust the audio pot on the GMOS-04. For best results put the radio at 75% volume and use a multimeter on vehicle side of the harness to measure the voltage while you are adjusting the pot. you should not have to go past 3/4

hopes this helps other installers in the future

also when the mute wire is removed, what the GMOS-04 does when you press the onstar button is completely cut audio from the radio and onstar plays through the front left speaker as normal. so even without the mute wire connected, onstar still works.

I had the same issue with my z130bt but had a different solution. It seemed to be happening to my car when its been sitting out in the sun and it gets hot. I would blast the AC for about 5 min and cool the inside down and the z130 would start working fine. I talked to a couple installers I know and they said that the fan in the back of the z130 doesnt cool the unit well enough. We added a separate 12 volt fan back behind the in the space after the radio and it sucks the heat out better. Only when its super hot out now do I still get that problem and then I blast the AC for a few and we are good to go. This is installed inside a 2011 suburban with onstar and hooked up with the gmoslan and the mute wire hooked up too. Appatently the unit just heats up too quickly and pioneer is aware of this. Whether they will do anything about this is another story.

I had the same issue with my z130bt but had a different solution. It seemed to be happening to my car when its been sitting out in the sun and it gets hot. I would blast the AC for about 5 min and cool the inside down and the z130 would start working fine. I talked to a couple installers I know and they said that the fan in the back of the z130 doesnt cool the unit well enough. We added a separate 12 volt fan back behind the in the space after the radio and it sucks the heat out better. Only when its super hot out now do I still get that problem and then I blast the AC for a few and we are good to go. This is installed inside a 2011 suburban with onstar and hooked up with the gmoslan and the mute wire hooked up too. Appatently the unit just heats up too quickly and pioneer is aware of this. Whether they will do anything about this is another story.

are you using the gmos-04? because from my testing, the avic-z130 isnt' the one that shuts down, its the GMOS-04. this has even been verified from metra tech support.