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Old 09-14-2010, 09:08 PM   #251
SVXdc
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+12V Accessory is the one that's switched on/off with the ignition key. See my pin-out table.
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Old 09-14-2010, 09:18 PM   #252
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Quote:
Originally Posted by SVXdc View Post
+12V Accessory is the one that's switched on/off with the ignition key. See my pin-out table.
Thanks man, good stuff
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Old 09-26-2010, 02:30 AM   #253
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if i install aftermarket unit with steering key wire, i just match the wire pin to the pin# of the harness? the unit has steering control settings for volume, track, and bluetooth answer key.
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Old 09-26-2010, 04:20 AM   #254
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For the speakers and power connections, yes. Use an aftermarket radio harness so you don't have to cut your factory wires. Then most of the colors will match your HU's harness.

Which HU model? Almost all require a steering wheel interface module (Axxess ASWC or one of the SWI-* models from PAC Audio).
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Old 09-26-2010, 01:57 PM   #255
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Originally Posted by SVXdc View Post
For the speakers and power connections, yes. Use an aftermarket radio harness so you don't have to cut your factory wires. Then most of the colors will match your HU's harness.

Which HU model? Almost all require a steering wheel interface module (Axxess ASWC or one of the SWI-* models from PAC Audio).
I still need the module for this and this unit?

they said the steering wheel interface wire is based on analog signal, as i read from another post the each steering key has different resistant to the wire.
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Old 09-26-2010, 07:47 PM   #256
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Originally Posted by kmb3asv141 View Post
I still need the module for this and this unit?

they said the steering wheel interface wire is based on analog signal, as i read from another post the each steering key has different resistant to the wire.
With the first one (from "Xtrons") it looks like you can connect it directly to your Subaru's steering wheel control wires, and the HU will "learn" the resistance of each button. So it has the equivalent of an SWC interface module built-in. You'll want my 20-pin harness so you don't have to splice into your car's SWC wires.

The second one (from "Liberty-Forever") should connect directly to your car's 20-pin radio harness. Since it is intended for newer Subarus, it should recognize your car's steering wheel buttons without requiring any programming. Check with the vendor about both issues to be certain.
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Old 09-26-2010, 08:29 PM   #257
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Originally Posted by SVXdc View Post
With the first one (from "Xtrons") it looks like you can connect it directly to your Subaru's steering wheel control wires, and the HU will "learn" the resistance of each button. So it has the equivalent of an SWC interface module built-in. You'll want my 20-pin harness so you don't have to splice into your car's SWC wires.

The second one (from "Liberty-Forever") should connect directly to your car's 20-pin radio harness. Since it is intended for newer Subarus, it should recognize your car's steering wheel buttons without requiring any programming. Check with the vendor about both issues to be certain.
both unit has bluetooth built-in, the on/off-hook and talk key on the steering wheel will wire to the OEM microphone on the roof or it wires to the 20pin harness then to the unit?
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Old 09-27-2010, 01:04 AM   #258
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Quote:
Originally Posted by kmb3asv141 View Post
both unit has bluetooth built-in, the on/off-hook and talk key on the steering wheel will wire to the OEM microphone on the roof or it wires to the 20pin harness then to the unit?
What model and year Subaru do you have?

The on/off-hook and talk buttons are so new, that the Liberty-Forever HU may not support the car's 3rd SWC wire.

If the Xtrons HU can be be connected to a car that uses 3 wires for the SWCs (with one of those wires being connected to ground), then it should be able to "learn" all of the buttons, including the new phone buttons.

But you will need to ask both vendors to verify.
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Old 09-27-2010, 01:34 AM   #259
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Originally Posted by SVXdc View Post
What model and year Subaru do you have?

The on/off-hook and talk buttons are so new, that the Liberty-Forever HU may not support the car's 3rd SWC wire.

If the Xtrons HU can be be connected to a car that uses 3 wires for the SWCs (with one of those wires being connected to ground), then it should be able to "learn" all of the buttons, including the new phone buttons.

But you will need to ask both vendors to verify.
2011 impreza sport
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Old 11-23-2010, 01:51 PM   #260
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Quote:
Originally Posted by SVXdc View Post
+12V Accessory is the one that's switched on/off with the ignition key. See my pin-out table.
I have an aftermarket (JVC) HU, do I still tap into the +12 ACC for the remote-on line to my amplifier, or can I tap into the remote-on pin from the new HU to do that function? I am assuming the aftermarket HU is sending a power signal on that pin no matter what source (CD, FM, AUX) you are using, is that correct?
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Old 11-23-2010, 03:03 PM   #261
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Has anyone been able to locate where the VSS (Vehicle Speed Sensor) and Reverse wires are for 2008 non-navi Imprezas? I did a Navi transplant in my non-navi WRX and the GPS frequently loses single (lags) for a few seconds. The VSS wire is meant to fix this, but since it's not on the factory harness, I don't even know where the wire is!

There are several people who asked the same question in this thread, but no answers!
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Old 11-23-2010, 06:11 PM   #262
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VSS should be able to found at pin 31 at the instrument cluster. I need to pull the cluster to verify this.

Reverse can be found in the passenger kick panel. It is a brown/yellow lead that heads towards the rear of the vehicle (for obvious reasons).
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Old 12-22-2010, 12:23 AM   #263
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Thanks for the excellent diagrams. I'll be working on installing a Parrot Unika box for my 2010 OBS (with the Parrot MKi9000 hands free system). The Unika instructions state that one of the wires must be plugged into the ignition power (clearly documented here as the +12V Accessory pin). Any tips on this install? Do I just... cut the quick connect Parrot harness wire at that pin and splice in the 12V Acc wire right there?

(Also, can anyone confirm if the steering wheel controls are indeed based on a resistive system and not the CAN or K bus?)

Thanks!
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Old 12-22-2010, 03:11 PM   #264
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It sounds like a local car stereo retailer has scotch locks available (example: http://www.etrailer.com/Accessories-...5.html?feed=pn), so I'll try to stop by there and pick up a few. Is there any reason why this would not be a good idea with the 12V Acc power wire?

Thanks!
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Old 12-22-2010, 04:46 PM   #265
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Quote:
Originally Posted by aindfan View Post
Thanks for the excellent diagrams. I'll be working on installing a Parrot Unika box for my 2010 OBS (with the Parrot MKi9000 hands free system). The Unika instructions state that one of the wires must be plugged into the ignition power (clearly documented here as the +12V Accessory pin). Any tips on this install? Do I just... cut the quick connect Parrot harness wire at that pin and splice in the 12V Acc wire right there?

(Also, can anyone confirm if the steering wheel controls are indeed based on a resistive system and not the CAN or K bus?)

Thanks!
They are just resistors. I have all my buttons working and could give you values if you find a way to convince me to take out my radio again. There are 2 outputs and 1 ground reference lead.
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Old 12-22-2010, 04:48 PM   #266
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Originally Posted by aindfan View Post
It sounds like a local car stereo retailer has scotch locks available (example: http://www.etrailer.com/Accessories-...5.html?feed=pn), so I'll try to stop by there and pick up a few. Is there any reason why this would not be a good idea with the 12V Acc power wire?

Thanks!
I hate scotch locks. They can eventually wear out or make poor connection. You are better off stripping back the insulation and going straight copper to copper.
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Old 12-22-2010, 05:51 PM   #267
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Thanks for your replies. According to Parrot's guide here, I need to connect the power of the Unika box to the accessory power (pin 3) and it seems that I also need to make a connection to ground and possibly the steering wheel signal wire, which appears to be pin 4 on the diagram. The Unika instructions get somewhat confusing, though - on one page it says that 12V Accessory power is needed, and on another page it says that Unika's V1 wire must be connected to the steering wheel signal and V2 must be grounded (from an EE background - I can't figure out why on earth they would name a signal pin with the letter V, but I didn't make this thing). Can anyone clarify some of this?

Wait a second... now that I took another look at the plug diagram, I noticed that there is a steering wheel + wire at pin 4, and a steering wheel - common wire at pin 14. This makes it sound like Unika's V1 should tap into pin 4 and V2 should tap into 14.

As I mentioned above, another confusing part of the instructions is that 12V ignition power "is not provided" and must be somehow plugged into the Unika. Unfortunately, their wiring diagram doesn't give much of an indication of where it should be connected. The quick connect harness appears to provide 12V ignition power to the Parrot box, so I don't understand why this would not be provided to the Unika if it taps into the same set of wiring (the main Parrot plug is removed from the Parrot unit, plugged into the Unika harness, and this harness routes the signals to wherever they need to go, whether to the Unika or MKi boxes).

Thanks again - once I gather some courage (and a soldering iron, ideally, but electrical tape could be a start), I'll give this install a try over the weekend. Many thanks for the advice on the scotch locks.

Thank you for the offer littlewhitewagon - the Unika box is supposed to detect the buttons on its own.
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Old 12-22-2010, 10:52 PM   #268
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Quote:
Originally Posted by littlewhitewagon View Post
VSS should be able to found at pin 31 at the instrument cluster. I need to pull the cluster to verify this.

Reverse can be found in the passenger kick panel. It is a brown/yellow lead that heads towards the rear of the vehicle (for obvious reasons).
Yup, the VSS wire should be pink/green. It is easy to pull out the cluster and tap in there, a short run to the radio.
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Old 01-31-2011, 03:40 PM   #269
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Back when I originally had my F900BT installed in my 09 STI non-NAVI, the installers ended up splicing all the wires and 2 years later I'd like to get in there and redo it, esp since I believe the steering wheel control adapter is borked (radio starts to have a mind of its own sometimes). If I understand this correctly, the adapter you have for sale (http://ae64.com/20-pinfwdharness.htm) will connect to the factory adapter and to the Pioneer adapter that came with the HU and fix all my worries?
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Old 02-01-2011, 12:33 AM   #270
SVXdc
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It should, provided that your installers didn't bork your factory SWC wires when they spliced into them.
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Old 02-01-2011, 07:47 AM   #271
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It should, provided that your installers didn't bork your factory SWC wires when they spliced into them.
They used one of the SWC converters, I just think that it has come loose over the last two years. Sweet well ordering the part.

Edit: I honestly tried searching the stickies, and a regular search wouldn't have been helpful, but what are the "CAN" wires used for? Do I need the interface with them or without? This is the work I had done when the HU was installed:

Door speakers replaced with Memphis Audio M-class speakers (wired through the hu)
Memphis Audio amp installed (wired to the hu)
Audio Integrations sub box w/ Memphis Audio M-class sub installed (wired through the amp)
Rear backup camera wired through the hu

So, do I need the CAN version or not?

Last edited by Hareball; 02-01-2011 at 08:13 AM.
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Old 02-03-2011, 12:27 AM   #272
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CAN (Controller Area Network) is a data bus that allows various devices in the car to communicate with each other over shared wires.

On Subaru's 2008 Impreza wiring diagrams, these wires from the radio harness are on a low-speed network with the Body Integrated Unit, A/C Control Panel, and the Combination Meter.

You'll only need the CAN bus wires on the radio harness when you're keeping the factory HU. I'm not aware of any aftermarket radio that knows how to "talk" to the Subaru's CAN bus. So no, you don't need the CAN wires.
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Old 02-03-2011, 08:35 AM   #273
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Quote:
Originally Posted by SVXdc View Post
CAN (Controller Area Network) is a data bus that allows various devices in the car to communicate with each other over shared wires.

On Subaru's 2008 Impreza wiring diagrams, these wires from the radio harness are on a low-speed network with the Body Integrated Unit, A/C Control Panel, and the Combination Meter.

You'll only need the CAN bus wires on the radio harness when you're keeping the factory HU. I'm not aware of any aftermarket radio that knows how to "talk" to the Subaru's CAN bus. So no, you don't need the CAN wires.
And correct me if I'm wrong, but the only thing that the stock head units (non-navi) are using that CAN info for is to adjust the Speed Volume, right? I couldn't figure out anything else in the stereo that uses external info..
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Old 02-05-2011, 11:17 AM   #274
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And correct me if I'm wrong, but the only thing that the stock head units (non-navi) are using that CAN info for is to adjust the Speed Volume, right? I couldn't figure out anything else in the stereo that uses external info..
The OEM HU is secretly spying on your driving habits and transmitting it out to the black helicopters via Bluetooth.

I'm not even sure that the HU uses CAN for speed-sensitive volume control. Do any Impreza or Forester models have that?
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Old 02-05-2011, 11:23 AM   #275
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Originally Posted by SVXdc View Post
The OEM HU is secretly spying on your driving habits and transmitting it out to the black helicopters via Bluetooth.

I'm not even sure that the HU uses CAN for speed-sensitive volume control. Do any Impreza or Forester models have that?
Haha, yep I was wondering why they were following me!

My stock head unit in my 09 premium wrx has an option to engage speed sensitive volume. It increases a few notches as you go faster.
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