I had been searching for a handsfree bluetooth/A2DP installation for my 2005 non-navi TSX for quite awhile and recently came up with a good combination I wanted to share with everyone. My main criteria was that all audio had to run through the stock stereo headunit/amp/speakers to provide the best audio quality, everything handsfree/wireless, minimal visibility, and A2DP support. For those of you unfamiliar with A2DP, it is a "Stereo Bluetooth" profile supported by many newer cell phones and mp3 players. It allows you to wirelessly play music through a headset or in this case, your car stereo. The biggest attraction for me was to use streaming music services like Pandora or Slacker and play them in my car. Forget about paying for XM
The equipment I purchased was a fairly simple install and relatively inexpensive. I learned most of the info here on how to do the install here in the forums so I wanted to give a good writeup in case anyone else wanted to try it. The two main components were the Soundgate HONAUX4
for the auxiliary stereo input and the Motorola T605
for the bluetooth. I went with the motorola because it was cheap, supported A2DP, and had RCA outputs (vs external speaker or speaker wire taps).
Quality wireless stereo through factory audio
Automatic bluetooth sync when you turn on your car
No splicing, easy install
Extra 3.5 aux input
Minimal visible changes to car
Good handsfree microphone sound
Can't switch songs from steering wheel (must use T605 buttons)
Odd phone audio wiring
Music on phone does not shut off when you turn car off
Have to switch to AUX on factory stereo, no automatic mute for phone calls
No power to phone (but I wanted to be fully wireless)
Wiring diagram is here
. Total cost was around ~$165. I did consider having Bestbuy do the install, they quoted me $70 so for some people that might be worth it. Here are the basic steps to follow:
1. Buy the Soundgate HONAUX4 to create an auxiliary input to the factory stereo, it shows up as a second CD changer. I bought it here
, they shipped the next day and had the cheapest price by far.
2. Remove the tray below the stereo (see video below)
3. Remove the plug from the back of the stereo (see video below)
4. Plug the HONAUX4 into the back of the stereo, put the original stereo plug into the HONAUX4
5. Buy the Motorola T605. I bought it from a reseller on amazon
for about $60. I think it is an older model which is why it is so cheap.
6. Cut the wiring harness off the power adapter cable so you have access to the wires
7. Buy two Littelfuse FHM200BP
ATO Add-A-Circuit Kits for tapping into your fuse box. I have got these from Autozone and Murrays in the past, looks like amazon has them also.
8. Crimp the red power wire to the Littelfuse, insert the 5 amp fuse, place the unit in position 33 (constant) in the fuse box.
9. Crimp the green ignition wire to the Littlefuse, insert the 3 amp fuse, place the unit in position 29 (ignition switched) in the fuse box.
10. Loosen the nut below the fuse box and wrap the black wire around for a ground. Or find another ground.
11. This step I took a guess on and it seems to be working fine. The issue is that the music from the T605 is sent through the standard RCA cables but the phone audio is either sent to an external speaker (included, sounded great actually) or the Orange and Blue wires from the wiring harness. I guess some cars have line in for phone only, but I don't believe the TSX does. So I did a workaround to route the audio from the orange and blue back to the HONAUX4 (because I wanted all audio through the factory speakers). The first part was the "RCA Plug to Tinned Wires
" which I picked up at radio shack. This converts the orange and blue wires to a mono RCA jack.
12. Next steps are up to you, I used some stuff I had on hand. The basic idea is to route both audio sources into the HONAUX4, since only one source would only ever play at a time there never should be a conflict. I used a couple of RCA splitters you can get anywhere, but I like monoprice
13. Mount all you stuff, hide your wires, etc (test first obviously). This is not the easiest because there is quite a bit of extra wire, just get some cable ties. I mounted the junction box (using double sided tape) for the T605 behind the dash in the area below the sunroof button, there is a nice flat metal panel you can use. I don't like where I put the T605 user interface (by the shifter) because it is slightly bright at night, so I may place it in the not an ashtray.
Grabbed a short video to demo how it works.
1.) Tray removal
2.) Stock stereo input plug removal
3.) Fuse Box with taps
4.) Demo of bluetooth A2DP stereo audio and bluetooth headset operations of the Motorola T605.
Hope this helps somone considering a similar configuration.