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PAC RP4.2-TY11 Wiring Interface

Connect a new car stereo and retain factory JBL system, steering wheel controls, and aux input in select 2003-up Toyota, Lexus, and Scion vehicles

46 Reviews | 2 questions - 3 answers

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Our take on the PAC RP4.2-TY11 Wiring Interface

PAC's RP4.2-TY11

PAC's RP4.2-TY11 wiring interface lets you install an aftermarket receiver into select 2003-up Toyota, Lexus, and Scion vehicles. The interface works with non-amplified systems, as well as factory JBL and JBL Synthesis amplified audio systems. You'll retain your factory steering wheel control functions and the use of the built-in 3.5 mm auxiliary audio jack. The interface includes wired outputs for navigation radio installation and a 12-volt accessory power lead for your new stereo. Warranty: 1 year.

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so. You can also call an Advisor for more information.

The adapter kit did the job, but the wire lengths were a bit short is a couple of places. Also, there were wires that were not covered by the documentation with Acronyms for labels. The documentation should at least tell you what the acronym means.

Ken, Orlando, FL

What's in the Box:

  • Radio replacement/SWC interface module (for Toyota/Scion/Lexus)
  • Interface harness
  • Vehicle/Radio harness
  • Instructions

PAC RP4.2-TY11 Wiring Interface Reviews

Average Customer Review(s):

(46 Reviews)

PAC RP4.2-TY11 Wiring Interface

Anonymous from Millbrook, AL on 2/21/2017

2008 Toyota Highlander
Crutchfield Customer Review (What's this?)

Did Not Work



Crutchfield response on February 22, 2017 Once we saw this review, our Tech Support team reached out to help this customer. We'll either help them get the interface working the way it should, or help them return it for an exchange or refund.

Good adapter Kit

Ken from Orlando, FL on 2/6/2017

2010 Toyota Tacoma
Crutchfield Customer Review (What's this?)

The adapter kit did the job, but the wire lengths were a bit short is a couple of places. Also, there were wires that were not covered by the documentation with Acronyms for labels. The documentation should at least tell you what the acronym means.

Pros: Did the Job

Cons: Documentation could use an update

PAC RP4.2-TY11 Wiring Interface

Anonymous from Closter, NJ on 1/29/2017

2008 Toyota FJ Cruiser
Crutchfield Customer Review (What's this?)

Works perfectly,pay the extra $ and have prewiring done Makes for easy install



Great harness

Mark from Enterprise, AL on 1/21/2017

2008 Toyota FJ Cruiser
Crutchfield Customer Review (What's this?)

This harness covers a wide variety of vehicles. That being said, this was my second time ever doing an install. Had a couple of wires that I wasn't sure about but the staff at Crutchfield was amazing and helped me through all of it! Great harness especially having the ability to program certain functions on my steering wheel!

Pros: Amazing functionality

Cons: Not for beginners, Crutchfield really came through for me!

PAC RP4.2-TY11 Wiring Interface

Neil from Pittsburgh, PA on 1/18/2017

2008 Toyota Tundra
Crutchfield Customer Review (What's this?)

I was worried about this product based on mixed reviews. I have to say I am pleased that I got it. Pretty simple to install and works as advertised.

Pros: Works properly

Cons: Nothing really. Instructions could've been a little better but common sense is really al that's needed. One issue I had was quickly explained to me by tech support

Easy install, confusing instructions

Seth from St. Paul, MN on 1/17/2017

2005 Toyota Sienna
Crutchfield Customer Review (What's this?)

Easy install. Didn't bother with any of the steering wheel control customizations but all of my steering wheel buttons work as expected. I was confused about the wiring harness because it is not clear that they don't all need to be hooked up. On my 2005 Sienna with JBL, only two of the harness connections hook up to the car. There is a third small black plug coming from the car that does not get hooked up to anything.



Your mileage will vary based on your system

Brad from Pleasanton, CA on 1/10/2017

2007 Toyota Prius
Crutchfield Customer Review (What's this?)

The PAC RP4.2-TY11 came up as the option on Crutchfield for a 2007 Prius with JBL to retain the steering wheel controls. If you search Prius forums for 2nd generation (2004-2009) Prius installs, you will see that there have been some issues with this unit. For me, it was the intermittent cutting in and out of the signal regardless of input. The better option is using the Axxess TYTO-01 and ASWC-1 (and ASWC Harness) to avoid the issues. Crutchfield replaced the PAC with the Axxess and everything works fine now. Again, your mileage will vary. You will still need to add a resistor to get the MFD working properly with the Axxess system.

Pros: All in one solution (but you won't use all the connectors)

Cons: Instructions difficult to follow. Has issues with 2nd Generation Prius systems.

PAC RP4.2-TY11 Wiring Interface

Anonymous from Kalamazoo, MI on 1/2/2017

2008 Toyota Sequoia
Crutchfield Customer Review (What's this?)

Worked well for connecting my steering wheel controls to my pioneer head unit. Only complaint was that supposed my deck could take a voice recognition input and I programmed a button to do this but could not get it to work. Not the end of the world though. Had to call support once or twice but crutchfield support was awesome and knew what they were talking about. Really like the ability to program long press and short press to gain more features.



Fits 2012 Fj without jbl

Chris from Kailua Kona, HI on 12/26/2016

2012 Toyota FJ Cruiser
Crutchfield Customer Review (What's this?)

Was very confusing but after a couple of hours I had it figured out.

Pros: Works well on my 2012 Fj cruiser with pioneer DVD deck

Cons: Very confusing instructions,lots of extra stuff not used. Seems like it could be simplified.

PAC RP4.2-TY11 Wiring Interface

Anonymous from Richland, WA on 12/11/2016

2011 Toyota Prius
Crutchfield Customer Review (What's this?)

It works but the instructions could be significantly improved. It would be great if Crutchfield provided additional documentation with this product.



Works well, but complicated

Eric from El Paso, TX on 12/4/2016

2003 Toyota 4Runner
Crutchfield Customer Review (What's this?)

For a seemingly simple device, I found the unit to be more complex than expected. I also found the instructions to be somewhat lacking. There is basically only a wire ID chart for wiring. I realize that there are practically an infinite different set-ups which would make traditional wiring diagrams difficult. But for my set-up, it required a call to Tech support to understand the remote/amp wires and the unused NAV wires. I had to also question the unlabeled brown wire that was unidentified (different than the brown loop). It was also concerning that one of the stock connectors was left unconnected, in the final configuration. Everything worked fine. But a note about this might be helpful. Most disappointing was the Tech support I received when trying to figure out the programming and interface to the new Blaupunkt head unit. I'm an engineer, but found the programming instructions less than concise ( calibration vs re-assigning, ect and the actual steps to program). Tech support was no help with this indicating that this unit and the Blaupunkt units rarely work together, opposing what sales told me. I did eventually get everything working properly. But it required significantly more time than expected. Better and more detailed instructions would be helpful.

Pros: Works great with the steering wheel controls

Cons: Poor instructions , poor wiring diagram and unclear programming instructions

PAC RP4.2-TY11 Wiring Interface

Anonymous from San Francisco, CA on 12/2/2016

2003 Toyota 4Runner
Crutchfield Customer Review (What's this?)

Nicely built harness however in my particular fitment many leads and several connectors remain unused.



PAC RP4.2-TY11 Wiring Interface

Anonymous from Austin, TX on 11/28/2016

2006 Toyota Tacoma
Crutchfield Customer Review (What's this?)

Worked great and easy install!



PAC RP4.2-TY11 Wiring Interface

Anonymous from Knoxville, TN on 11/28/2016

2006 Toyota Tundra
Crutchfield Customer Review (What's this?)

Very intimidating when you open package and review the very minimal, confusing and inadequate instructions. BUT if you lay out the wires, plugs and such; map out what you understand and what matches up, then just make a list of questions and contact Crutchfield tech people, they will answer all your questions like magic! I was dubious when I called but was blown away with their help. Installation went well and as I held my breath and powered the unit up all was well.

Pros: Allows not only use but customization of steering wheel controls.

Cons: Very poor instructions with harness.

PAC RP4.2-TY11 Wiring Interface

gene from Upper Marlboro, MD on 11/9/2016

2007 Toyota RAV4
Crutchfield Customer Review (What's this?)

Really complicated...took a number of calls to crutchfield tech support and the manufacturer pac to get it fully up and running. Retained a number of the steering wheel controls of my wife's Rav4 directly out of the box.

Pros: work as advertised

Cons: needlessly complicated

PAC RP4.2-TY11 Wiring Interface

Anonymous from Bel Air, MD on 11/6/2016

2010 Toyota Prius
Crutchfield Customer Review (What's this?)

Was able to install and retain factory functions in our 2010 Prius.



Not for the novice!

Scott from Paducah, KY on 10/30/2016

2005 Toyota Sequoia
Crutchfield Customer Review (What's this?)

Not a DIY type project for my 2005 Toyota Sequoia. Couldn't have installed without the excellent Crutchfield tech support. Had to call 3 times total to get it installed. Do not buy from a cheaper source because you won't get tech support. And chances are, you'll need it!

Pros: Installs into factory harness

Cons: Poor install instructions

Problematic, but with much tech support from Crutchfield finally works

James from Wappingers Falls, NY on 10/29/2016

Crutchfield Customer Review (What's this?)

Initial impression: The unit is overly complicated and tries to fit too many models at once. Directions a bit obtuse. Only a few of the connectors attached and hard wired were needed. The rest just take up space and clutter otherwise neat wiring. Rather confusingly, the wiring colors do NOT match the directions. Crutchfield was also initially stumped as well since PAC changed the very much needed blue with white stripe remote turn on wire locations. A call by me to PAC got not much of a response. Worse, even once sorted out it did not work. After much time and several calls to Crutchfield's tech support later we realized the unit was likely defective. Crutchfield quickly shipped a replacement, which confirmed our suspicions. While the new one worked the performance was a bit erratic. Had to re-program it, which is a bit awkward and must be performed in an exact order. "Preset" and "Track" may not be consistent from vehicle to vehicle. Took a few tries and re-sets. An easier method with a laptop apparently exists, but only works without on a Windows computer. Great, really, Nobody uses a Mac. Sigh... However, after a few tries and a deliberate reversing of up and down to match the on screen movements it finally worked. We will see how this continues over time. My time and patience are limited and this challenged both. Without Crutchfield's tech support I'd have simply returned it all.

Pros: It finally allowed steering wheel controls to work.

Cons: Overly complicated and at times less than clear directions. Possible quality control. I am not the only reviewer here to have a defective unit.

PAC RP4.2-TY11 Wiring Interface

Anonymous from Gilbert, AZ on 10/28/2016

Crutchfield Customer Review (What's this?)

Product performed as specified. Installation instructions were not exactly correct. Had to make several calls to Tech Support. Finally after additional diagrams were sent, I was able to get everything working. I like being able to use the steering wheel button controls with the after market receiver. Gave it a 4 only due to missing data in instructions.



Thanks Crutchfield: 2004 Toyota Sienna

Stephen from Annapolis, MD on 10/23/2016

2004 Toyota Sienna
Crutchfield Customer Review (What's this?)

Excellent interface. Excellent support for Crutchfield. I tried three different interface cable clusters from sites that indicated they would support my situation, i.e., car to aftermarket radio. Everything snapped together easily and the splicing that was required was the same as any straightforward car radio instal. I had a little trouble with the steering column interface connection and an easy call to the Crutchfield support line resolved the issue quickly.

Pros: Easy install (similar to any aftermarket clip and splice).


PAC RP4.2-TY11 Wiring Interface

Todd from Benton, AR on 10/17/2016

2005 Toyota Avalon
Crutchfield Customer Review (What's this?)

It actually works! Yes, I installed this in a 2005 Toyota Avalon that originally came with the JBL stereo and amp. And it works perfectly. The amp works and the info screen still works for the AC and other non-stereo functions too. I had read up on installing on aftermarket stereo in an Avalon. And most installs include using a long wiring harness to put the factory stereo in the trunk in order to keep the info screen working. But with this PAC module, it's just plug and play. The stereo I installed was a JVC single DIN unit. It doesn't have the option for steering wheel controls, so I wasn't able to try that out. This is my daughter's car and I plan to get her a nicer double DIN unit for Christmas. I will then see how well the the PAC module retains those controls. But I suspect they will be fine. As others indicated in their reviews, the instruction are not really good. But in the Avalon, everything goes where you expect it to. So there was no hang-up. But I specifically bought this from Crutchfield because I wanted tech support in case I couldn't figure it out.

Pros: Works exactly as advertised in 2005 Avalon.


PAC RP4.2-TY11 Wiring Interface

Anonymous from Wailuku, HI on 10/17/2016

Crutchfield Customer Review (What's this?)

I installed the PAC RP4.2-TY11 in my 2004 Toyota Tundra with the JBL stereo system. It's a perfect plug and play solution for the JBL system. The stock steering wheel controls works perfectly. I've put off any stereo upgrade because of the JBL system design.



Confusing instructions but it works

Chris from Houston, TX on 9/20/2016

2005 Toyota Sequoia
Crutchfield Customer Review (What's this?)

Works as described. Now I have an aftermarket stereo and have full functionality of the steering wheel controls (SWC). The only reason I'm not giving it five stars is the instructions. It labels all of the harnesses and identifies each wire, but doesn't tell you exactly what to hook together. Also know that on your vehicle, you might have a couple of harnesses that you don't even use. I didn't know that at first so I wasn't confident that I had set it up correctly even though I did.

Pros: Does what it should. If you know a little bit about car audio and already generally know what wires need to go where you'll figure it out.

Cons: Confusing instructions. If you have never done a stereo install yourself you may not be able to follow the instructions. They lack some steps and details.

Works. Complicated

Brian L from California on 9/16/2016

2011 Toyota Prius
Crutchfield Customer Review (What's this?)

Installed this in my wife's car. Works great; however, somewhat complicated to install. More so because it doesn't really state that some of the harness is not required on some installs. Had two connectors that were not used.

Pros: Works as described.

Cons: Installation directions.

PAC RP4.2-TY11 Wiring Interface

Anonymous from Knoxville on 9/12/2016

2008 Toyota RAV4
Crutchfield Customer Review (What's this?)

Parts did not provide interface for SWC connections as advertised



Crutchfield response on September 14, 2016 In response to this review, Daniel, one of Crutchfield's Tech Support Specialists, reached out to inform this customer that this interface does include steering wheel control retention for his RAV4. Daniel assisted him in the steps to make this happen and asked for the model of his radio to help him further.

PAC RP4.2-TY11 Wiring Interface

Anonymous from New York, NY on 8/31/2016

2004 Toyota Sienna
Crutchfield Customer Review (What's this?)

Not truly plug and play. Needed additional adapters for proper antenna hook up. Like ability to add additional programing to steering wheel control.



PAC RP4.2-TY11 Wiring Interface

Anonymous from Guntersville, AL on 8/17/2016

2003 Toyota 4Runner
Crutchfield Customer Review (What's this?)

Awesome product it allowed me to keep my premium sound system that came from the factory which includes my steering wheel controls.



Was able to keep steering wheel controls

Clint M from Barrington il on 8/8/2016

2012 Toyota Corolla
Crutchfield Customer Review (What's this?)

Adapter allowed me to keep factory steering wheel controls! Needed tech support to assist but was a good experience

Pros: Allowed me to keep factory controls

Cons: Lots of wires!

PAC RP4.2-TY11 Wiring Interface

Jerry R. from Augusta, GA on 8/7/2016

2006 Toyota RAV4
Crutchfield Customer Review (What's this?)

Working fine, some install instructions were confusing,

Pros: Does everything it is supposed to

Cons: Instructions confusing in spots.

PAC Interface

Bill H from Lakeland, FL on 7/27/2016

2011 Toyota Prius
Crutchfield Customer Review (What's this?)

The PAC wiring interface was everything I needed for an easy and complete installation of my new radio. It included the steering wheel interface. The instructions were a little complicated for a novice like me. However, once I got started it seemed to fall into place.

Pros: Everything was included

Cons: Instructions are not as clear as they could be

PAC RP4.2-TY11 Wiring Interface

Tom B from Hastings, MN on 7/26/2016

2009 Toyota RAV4
Crutchfield Customer Review (What's this?)

This wiring interface works great. I had very little trouble connecting it and getting it to work the first time. The instructions were a little overwhelming at first, but once I realized that my setup was relatively simple (I have the JBL speaker system, which handles all of the sound distribution), the audio connections and steering wheel controls worked the first time. The only problem i had was that my 2009 RAV4 has an antenna booster built in, and there is no connection in the PAC RP4 that connects to the antenna booster power in the car wiring harness. It took a couple of calls to Crutchfield to sort that out, but they have a note on which wire to splice into in the car wiring harness to connect to the Power Antenna radio wire. All was well after that.

Pros: Full featured, allows connection to my steering wheel controls

Cons: Instructions are a little complicated, but Crutchfield tech support easily handled my questions.

PAC RP4.2-TY11 Wiring

RHadley from Castro Valley, CA on 7/25/2016

2005 Toyota Sienna
Crutchfield Customer Review (What's this?)

Great product a little hard to wire. Had to splice in to the reverse wire to get the back up camera operating. Couldn't have done it without the great technical support of Crutchfield!!

Pros: The hands-free controls were great stereo sounds good.

Cons: The hands-free controls were great stereo sounds good.

Issues with Prius

Lance D. from Ocala, FL on 7/22/2016

2004 Toyota Prius
Crutchfield Customer Review (What's this?)

The instructions are not descriptive enough, You may need (most likely) a windows laptop to complete installation, after many, many calls to Pac audio and Crutchfield I was able to install it, but, there is a problem using this with Prius vehicles and only found out after consulting a few radio installation shops, the RadioPro4 is more problematic than they are worth and that most installers stick with the separate radio interface and steering control modules. I had a terrible unresolved issue with the volume on the stock amp bouncing up and down from 28 all the way up to 60 (max) and back down again, there was no resolution to the issue and I had to return it, I would suggest that if to have a second generation Prius that you do NOT use this module, it is bug ridden and most of the time result in undesirable issues. and don't bother calling Pac audio, the have no idea how to resolve the issue.

Pros: Should be an all in one solution to integrate your radio into your car's OEM digital amp and also have your steering wheel controls work.

Cons: Bugs in the unit itself are a major issue to having a successful install of your radio, they are know issues by radio installers and by Pac audio but, they have no intention of resolving them, I was told that the my Prius was an "old car" and that they cannot solve every issue that comes along with older cars.

radio interface jbl

Gaston b from Bk ny on 7/19/2016

2011 Toyota RAV4
Crutchfield Customer Review (What's this?)

Once I got it in and and working it is perfect but to much extra wire that are not need however is get 4 stars in my book

Pros: It works great with my aftermarket radio

Cons: To many extra wires need better install diarection

PAC RP4.2-TY11 Wiring Interface

Josh from Savannah, GA on 7/13/2016

2003 Toyota 4Runner
Crutchfield Customer Review (What's this?)

Great product easy install

Pros: Steering wheel controls work great.

Cons: Had remove radio twice because of lack of space behind radio I hit the program buttons disabling the controls

pac wiring harness

joseph c. from Lake Worth, FL on 7/11/2016

2014 Toyota FJ Cruiser
Crutchfield Customer Review (What's this?)

fit two of my four connections , seems to work well so far.

Pros: good instructions

Cons: lot of extra connectors.

Not for the average Joe

Nathan from KY on 7/5/2016

2006 Toyota 4Runner
Crutchfield Customer Review (What's this?)

Bulky and all of the extra untiltled wires make this unit very frustrating to install . I don't like having incomplete instructions but i finally made it through after taking the head unit harness and interface harness to a local shop that happens to have one of the Top one hundred installers in the nation ( he has the awards to prove it ) .

Pros: It works.

Cons: Lacking of a complete schematic.

Install made easy

Dano from Wilmington, NC on 6/28/2016

2006 Toyota Sequoia
Crutchfield Customer Review (What's this?)

This install kit allows for an easy install for the novice. All you may need in addition are butt connectors and a crimp tool. If you read the directions carefully all goes perfectly.

Pros: Plug and play for the most part, good directions

Cons: None

PAC to the reacue

Scott from Pennsylvania on 6/20/2016

2008 Toyota Highlander
Crutchfield Customer Review (What's this?)

Used as a replacement to the Metra Axxcess which wouldn't work for me. The RP4.2 installed easily and worked flawlessly.

Pros: Everything all in one unit, Good website and installation instructions.

Cons: Needs more labels for wiring harnesses.

Gnarly Harness w/ Great Features

Jason from Spokane, WA on 6/19/2016

2007 Toyota Avalon
Crutchfield Customer Review (What's this?)

The Toyota Avalon has a lot of electronic bits and pieces, and I thought I'd have to give up a bunch of them in order to install an aftermarket head unit. But this harness saved the day, and I was able to retain everything I used (you lose the stock nav, but I never use it). The instructions are straightforward, and the wires were all color coded and labeled as needed. Overall, this harness solved my problems and was easy to install.

Pros: Retains majority of core features, good instructions, easy to install.

Cons: None.

It works. Good thing it's fairly intuitive

Jeff from Longmont, CO on 6/19/2016

2006 Toyota Sienna
Crutchfield Customer Review (What's this?)

Not a whole lot of documentation so I had to do some guesswork. Fortunately, wires are color coded.

Pros: It works

Cons: Lack of documentation My brand wasn't listed under programming...has to manually program the steering wheel buttons

Good when it works - possible manufacturer issues?

Jeff from Charlotte, NC on 6/15/2016

2004 Toyota 4Runner
Crutchfield Customer Review (What's this?)

Troubleshooters, look here. I had purchased a "new to me" 4runner, and immediately ordered a new stereo (CDE-153BT) to put in it, and sprung for the extra cost of this harness to handle the factory amp and steering wheel controls. This was probably one of the more challenging installs I've done, as it's a LOT of wire, and trying to find a spot to cram it all in was a bit of a challenge, but it eventually worked out. After about a week, I started having intermittent issues if I was listening to bluetooth music and would receive rapid-succession text messages. The sound from the radio would completely cut out, even though I could tell sound was still playing. Convinced it was a faulty stereo/BT, I exchanged the CDE-153BT for a CDE-HD148BT, and am having the same issues. At this point, I'm now convinced that it's not the head unit, but this adapter that is causing the issues, and am getting it replaced, once it comes back in stock. Ultimately, I need the functionality so there's not much of a choice here, I just wish it worked better.



PAC RP4.2-TY11 Wiring Interface

James King from Orange Park, FL on 6/15/2016

2004 Toyota Camry Solara
Crutchfield Customer Review (What's this?)

System features and appearance is what I was looking for, but the only complaint I have is the display. During daylight the screen cannot be seen when navigation to either the XM portion or to the tuner, cannot see anything unless it's night time!



PAC RP4.2-TY11 Wiring Interface

Todd from Sacramento, CA on 5/31/2016

Crutchfield Customer Review (What's this?)

The adaptor worked flawlessly when first installed which was a very pleasant surprise to me, so i was very happy. However that was short lived with in 3 days it would not work at all. Crutchfield is sending a new unit. However I'm out the time to reinstall the unit.

Pros: Worked out of the box

Cons: stopped working with in 3 days! Installation instructions are poor at best wire harness should be more vehicle specific for custom fit!

It certainly makes things easier. . . .

Alexander from Grand Rapids, MI on 5/25/2016

2007 Toyota Camry
Crutchfield Customer Review (What's this?)

Trying to figure out the wiring for my '07 Camry with the JBL system would've been impossible without this thing. If you're familiar with connecting wiring harnesses, it shouldn't be any problem installing it. . . .

Pros: Easy to install once you know what you're doing. Not ridiculously expensive, but not cheap.

Cons: The unit is a little big. The sticker/tags on the wires are slightly misleading. I had to connect wires from each end in order to accurately connect my new receiver, but only wires on one end of the unit were labeled as "to new receiver." The directions were sufficient enough to get it installed but were very much lacking in detail. I ended up having a whole connector in my car not connect to anything on this unit, which worried me...but I learned that this was to be expected. . . .

PAC RP4.2-TY11 Wiring Interface

Ryan from Riverside, CA on 4/24/2016

Crutchfield Customer Review (What's this?)

perfect fit,easily adaptable.




Hands-on research

Product Research


Radio Replacement Interface (for Toyota/Scion/Lexus): The PAC RadioPRO RP4.2-TY11 radio replacement interface is designed for 2003-2016 Toyota, Lexus, and Scion vehicle models. The module enables installation of an aftermarket radio while retaining the factory steering wheel control functions as well as maintaining compatibility with the factory JBL and JBL Synthesis amplified audio systems, and the built-in 3.5mm auxiliary audio jack. The built-in USB connection and back-up camera can also be retained in conjunction with an optional PAC harness (sold separately).

Vehicle Compatibility: The RadioPRO 4 RP4.2-TY11 is compatible with the following 2003-2016 Toyota, Scion, & Lexus vehicles (as of 3/25/2016):

Make Model Year
Toyota 4-Runner 2003-2016
Avalon 2005-2015
Camry 2007-2016
Camry Solara 2004-2008
Corolla 2009-2016
FJ Cruiser 2007-2014
Highlander 2008-2015
Matrix 2005-2012
Prius 2004-2015
Rav4 2004-2015
Sequoia 2005-2016
Sienna 2004-2016
Tacoma 2005-2016
Tundra 2004-2015
Venza 2009-2015
Yaris 2008-2011
Scion FRS 2012-2015
iM 2016
iQ 2012-2013
tC 2005-2015
xA 2004-2007
xB 2004-2015
xD 2008-2012
IS 300 2005
  • Adjustment of the vehicle settings through the original radio's vehicle settings menu will be disabled after installation of your new radio. It is advised to make sure all settings are as you desire prior to removal of the original radio.
  • Does not retain Rear Seat Entertainment (RSE).
  • Not compatible in Lexus vehicles equipped with factory navigation.

Radio Select Switch: The radio select rotary switch on the side of the interface must be adjusted to the proper radio setting before plugging the interface into the vehicle. The RP4.2-TY11 is compatible with Alpine, JVC, Kenwood, Clarion, Pioneer, Sony, Jensen, Fusion, Advent, Boyo, Dual, Lightning Audio, Rockford Fosgate, and Visteon aftermarket radios (see owner's manual for appropriate dip-switch setting).

For Amplified & Non-Amplified Systems: The PAC RadioPRO RP4.2-TY11 can be used in vehicles with amplified & non-amplified factory audio systems. It retains JBL and JBL Synthesis amplified audio systems with real-time and programmable speaker fade function.

Programmable SWC: The interface comes pre-programmed for all of the vehicle's factory SWC functions and does not require programming, unless you wish to re-assign the SWC functions to different buttons or create secondary functions. The SWC functions can be easily programmed; see default SWC button assignments in the included user manual. The interface retains programming even if your vehicle's battery is disconnected.

Note: The SWC harness contains a Blue/Yellow wire and a 3.5mm connector. You will only use one of the connectors, based on your type of aftermarket radio. The Blue/Yellow wire supports Kenwood and newer JVC receivers. The 3.5mm jack supports Alpine, Jensen, Older JVC, Clarion, Pioneer, Sony, and Dual radios. Not compatible with Soundstream head units.

Factory Aux Input Retention: The PAC RadioPRO RP4.2-TY11 radio replacement interface module retains your vehicle's factory 3.5mm auxiliary input. Your aftermarket stereo must be equipped with a rear-panel Aux input (RCA-to-3.5mm adapter may be required).

+12V/10A Accessory Output: In many Toyota/Scion/Lexus vehicles, there is no 12-volt accessory wire in the factory harness, which requires the installer to run an accessory wire to the fuse box or underneath the steering column when installing an aftermarket radio. PAC's RP4.2-TY11 is designed to provide a 12V/10A switched accessory output (red wire).

Navigation Outputs: The PAC radio replacement interface provides wired outputs for navigation radio installation; including a VSS (vehicle speed sense), Parking Brake, and a Reverse Gear output to make installing an aftermarket navigation head unit simpler and less time consuming.

Note: Navigation outputs not retained by all vehicles.

Optional Factory USB & Backup Camera Harnesses: You are able to retain your vehicle's factory USB input and backup camera in select vehicles with an optional harness from PAC (USB-TY1, USB-TY2, CAM-TY11, CAM-TY12).

Wiring Connection Chart: The included wiring harnesses features the following hardwire connections.

Wire Color Function
Red +12 Volt Accessory
Yellow +12 Volt Constant
Black Ground
Blue/White Amp Turn On
Orange/White Illumination
White Left Front Speaker +
White/Black Left Front Speaker -
Gray Right Front Speaker +
Gray/Black Right Front Speaker -
Green Left Rear Speaker +
Green/Black Left Rear Speaker -
Purple Right Rear Speaker +
Purple/Black Right Rear Speaker -
Light Green Parking Brake Detection (-)
Pink VSS Output
Purple/White Reverse Output (+)

RadioPRO App: PAC offers a Windows compatible RadioPRO App software program to help you configure the interface. Use of the RadioPRO App allows you to do the following.

  • Red/White wire output behavior
  • Aftermarket radio Parking Brake Sequencing
  • Factory amplifier settings (Bass, Mid, Treble, Gain, Fader & Balance)
  • Real Time Fading
  • Update Product Firmware
  • Read Firmware/Hardware Versions
  • Access Product User Manuals
Note: The interface must be connected to the vehicle and your Windows laptop when using the RadioPRO App.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Wanted to keep my steering wheel controls [ George  Jan 28, 2017 ]
Fits vehicle [ Daniel  Jan 06, 2017 ]
Lets me use my steering wheel controls [ Joe  Dec 26, 2016 ]
Neccessary for installation and wheel controls [ MARTIN  Dec 01, 2016 ]
Allowed me to retain my factory steering wheel controls with my new HU. [ Max  Nov 29, 2016 ]
The instructions show that it is customizable and useable for a number of different vehicles. That flexibility allowed me to justify the higher cost when compared to other units. [ William  Nov 28, 2016 ]
Wanted to keep my steering wheel controls active when I installed my aftermarket stereo. [ Christopher K.  Sep 22, 2016 ]
Because I have steering wheel controls and didn't want to deal with shopping around for the various and sundry bits that would be needed to hook up my new HU...and the price was right. [ Mary  Sep 12, 2016 ]
Need this to make my Kenwood stereo work with the JBL amp in my 2009 Camry... This is to replace the CRUX unit that is failing to work correctly. [ Roland  Sep 11, 2016 ]
Prices great! [ Pat  Sep 05, 2016 ]
I want to continue using my steering wheel controls. [ RICHARD A  Aug 29, 2016 ]
it worked with my complex stock system [ Travis  Aug 27, 2016 ]
Recomended [ Jose M. Melende  Aug 25, 2016 ]
Recommend by buddy Buddy's Bio: [ ANGELO  Aug 19, 2016 ]
My CRUX unit quit working after 6 months. Only one speaker output would work. This was the replacement for the CRUX. [ Patrick  Jul 29, 2016 ]
The only way to go is use Crutchfield's wiring harnesses and customer support. [ Bryan  Jul 12, 2016 ]
Recommended to retain steering wheel controls. [ Aaron  Jul 12, 2016 ]
works with my vehicle [ Joseph  Jul 08, 2016 ]
This is a must in order to keep using the JBL amplifier and steering controls that came as an Toyota system upgrade. I didn't want to replace the entire system, just the deck. [ PERRY  Jul 07, 2016 ]
good price [ Jeffery  Jul 03, 2016 ]
To use the steering wheel controls in my 2009 Toyota RAV4 Limited. [ Thomas  Jun 26, 2016 ]
It's a good all in one solution to interface into your existing system as well as having all your steering controls work. [ L  Apr 30, 2016 ]
Ease of connectivity with as little wire cutting as possible - no wire cutting if possible to retain OEM wiring and connectors. [ Andre  Apr 22, 2016 ]
Part of package and better price when ordering radio. [ Michael E.  Apr 16, 2016 ]
Sam told me this was the best one to get Sam's Bio: [ Erik  Apr 10, 2016 ]

2 questions already asked

I am not sure. I can only imagine that it is on because not all input/outputs are being used.mine was red as well and everything works fine. I don't have steering wheel controls or navigation applied so it may read it as an error. [ Larry  Jul 03, 2016 ]
Not sure. Is your radio not working at all or are you having problems with harness. This was the only harness that would work with my toyota 4runner...Its the best harness out there.. [ TIM  May 11, 2016 ]
Depending on the year, make and model of your vehicle, this may be one of the items needed to install a new radio correctly. In order to see what you'd need for your car, you can use the "OutfitMyCar" application our website: You can also reach out to an Advisor for more help using the "Contact Us" link at the top of the page. I hope that helps. [ Larry  Apr 24, 2016 ]  Staff

Searches related to the PAC RP4.2-TY11 Wiring Interface Connect a new car stereo and retain factory JBL system, steering wheel controls, and aux input in select 2003-up Toyota, Lexus, and Scion vehicles