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tC Tech and DIY Info for the Scion tC

Cell Phone Mute Function

Old 03-08-2005, 04:32 PM
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Default Cell Phone Mute Function

I put a new Motorola Bluetooth hands free kit for my cell phone in my XB and wanted to mute the radio when the phone was in use and or when it rang. All hands free kits wired and wireless have a wire to mute a radio if supported.

My stock pioneer radio did not have this function documented, well I took the radio apart and found that the un-used pin on the smaller connector was the mute function.

I was not able to find a proper metal socket/pin to put into the connector so I took a #14 wire stripped off about 1/4 inch folded it back against itself to make a 1/8" doubled up end and forced it into the blank hole to make contact with the radio's pin then zip tied it to the wire next so it would not work it's way out. I then connected the end of this wire to the mute wire from the cell phone hands free kit and it works great.

My radio is the single CD stock pioneer that is used in the 2005 XB XA & TC.

I do not know if this works in the 6 cd version but if it has the same missing wire in the smaller connector it probably would. To test just ground that pin on the radio's connector if the radio mutes then comes back when removed you have it.

This is not documented by Toyota and I am not responsible if it kills your radio but it worked for me. I have been using it for about a month now, I use my XB for work and am on the phone on and off all day long.
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Old 03-08-2005, 04:41 PM
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Very cool info! Thanks!
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Old 03-08-2005, 04:41 PM
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Photos anyone?
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Old 03-08-2005, 09:20 PM
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Excellent info! I've been wondering the same thing, thanks for taking the guess work out of it!
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Old 03-09-2005, 05:53 AM
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Originally Posted by Speedpunk
Excellent info! I've been wondering the same thing, thanks for taking the guess work out of it!
good info all you need now is a photo so it can be moved to tech
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Old 03-09-2005, 06:03 AM
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its in tech.... pix would be sweet
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Old 03-13-2005, 01:22 AM
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Default Photo of connector

The next time I have the radio out I will get a photo of the connector, but It's easy:

There is only one missing wire, One conncetor is full and the other has one wire missing. The blank hole is the one you want.

I have taken my stock radio out now and replaced it with a Pioneer DEH-P6700MP, Pioneer Sirius tuner and the Crutchfield XB face mount kit. Sounds great and I now have Sirius working.
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Old 03-15-2005, 08:35 PM
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You rule. Thanks for the R&D!
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Old 03-18-2005, 03:42 PM
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Which Motorola Hands Free kit did you get? That's my #2 planned addition to my xA when I get it.
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Old 03-21-2005, 10:13 PM
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Default Anyone looking for 6 disc SCION radio

i have one available in California
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Old 04-13-2005, 04:50 PM
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will this work with any hands free kit
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Old 05-22-2005, 06:02 PM
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interesting... anyone have info on the rest of the pins on the stock radio?
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Old 06-08-2005, 11:43 PM
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Default Wiring diagram including radio wire colors

I can't vouch for it's accuracy, but I found this wiring breakdown at the12volt.com:

http://www.the12volt.com/installbay/...15628&KW=scion
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Old 08-08-2005, 01:18 PM
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Default Re: Cell Phone Mute Function on Stock 2005 Radio xB/xA/tC

Originally Posted by douglaing
I put a new Motorola Bluetooth hands free kit for my cell phone in my XB and wanted to mute the radio when the phone was in use and or when it rang. All hands free kits wired and wireless have a wire to mute a radio if supported.

My stock pioneer radio did not have this function documented, well I took the radio apart and found that the un-used pin on the smaller connector was the mute function.

...
Hey, douglaing. I just installed a Sony Ericsson HCB-30 Bluetooth handsfree car kit to my xB with following your instructions. It is working so well. The music will be cut when there is a incoming call. Very ncie, so nice, thanks!
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Old 08-11-2005, 09:01 PM
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Can this be used on a bluetooth headset? just wonder...
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Old 08-12-2005, 03:30 PM
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No, I don't think so. In fact, people use HCB-30 because they don't want to wear the headset. Instead, using the speaker to output the voice. If you don't want the passengers to hear your phone conversation, HCB-30 is not suitable for you.
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Old 08-12-2005, 04:32 PM
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oh... ok... thx... i am gonna stick with my Jabra BT headset
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Old 05-03-2006, 08:26 PM
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This post makes me wanna buy a Blue tooth phone now..
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Old 05-04-2006, 12:44 PM
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I'm looking into the Parrot CK3100. It can be found for $150 on Froogle. It seems to be a nice unit.

Thanks to this Tech article, I can do it myself now.
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Old 02-08-2007, 12:46 AM
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photos would be nice
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