Hello guys,
bluemotev asked me visit this thread so here I am.
I had installed 04 Solara Nav in my 04 Sienna (with Toyota external MIC kit w/ activation button & Eclipse Back-up CAmera which is pretty much the OEM Toyota camera) and now I have 07 Solara Nav (E7009) with fully working MIC (for Voice Command and Bluetooth), Voice Guidance, & Bluetooth as well. Still working on replacing my steering wheel switch pad for the Bluetooth ON/OFF button though. You're lucky you can just buy the right side switch pad. I have to buy the whole set (L, R, & ribbon cable) if I want the right side for my Sienna for $180.
If you'd like you're welcome to check our forum.
http://www.siennaclub.org/forum/index.php?showtopic=11673
As for a few question raised here, the connector designation R10, R16, etc. differes from vehicle to vehicle. The new R10 connector in 06 Sienna is NOT R10 in 07 Solara eventhough, they are the same connectors.
I believe the diagram you have here is one of diagrams I posted at SiennaClub forum from 06 Sienna.
Anyway, R10 connector is NOT present in my 04 Sienna either, nor in 05 since 07 Solara or 06 Sienna Nav (they are the same) are the new 5th Generation Nav systems & this new connector replaced 2 previously used connectors for MIC & Back-up Camera. I had to rip my previous connections for MIC & camera to wire them in R10 terminal. I'm having a very hard time finding one of these connectors so if anyone of can get one, I'd really appreciate it.
As for the MIC installation, I'm not sure if 06 4runner has this MIC option (or even Bluetooth) but from what I'm reading here, since you have the unused connector, you might but hard to tell without looking at the entire wiring diagram.
But you can certainly hook it directly to the R10 connector as I did with my MIC kit. But if you don't have the activation button (on steering wheel), the only way you can test it is to either use the Bluetooth feature or in the Diagnostic mode (to see how you can get into diag mode, check the above link).
YOu can also find the pin-outs for both MIC & activation button, AUX stereo input jack, etc. at the above link.
Now the speed, back-up, brake sensors...
1. I permanently grounded the brake sensor at the nav unit.
2. If you didn't purchase your vehicle with NAV option, you probably do not have the wiring/connector in your vehicle. I didn't have it in my Sienna eventhough it is the high-end trim model.
I hope I was of some help.
P.S. I'm not a regular here so send me a message if any questions. Good Luck
P.P.S. I just remembered something for the MIC to work. There are 2 pins (#12 & #18)you have to bridge in addition to the MIC wiring to get it to work. IT's also at the above link.