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Crux CS-TJ20 Wiring Interface

Connect a new car stereo and retain the steering wheel audio controls and aux input in 2003-up Toyota-built vehicles

Item # 249CSTJ20

Find what Fits your vehicle

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Item # 249CSTJ20

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About the Crux CS-TJ20 Wiring Interface

You'll only be able to retain your steering wheel audio controls with a compatible car stereo made by Alpine, Boss, Blaupunkt, Clarion, Dual, Jensen, JVC, Kenwood, Pioneer, Sony or Soundstream. No other brands are currently compatible.

Keep those factory options

Crux's CS-TJ20 interface ensures that you can keep the factory steering wheel controls and the factory JBL amplifier in your Scion, Toyota, or Lexus when you install an aftermarket radio. Another plus — your Toyota's auxiliary input will still work with your new car stereo. Connect this interface to the wires on your new stereo's wiring harness, and you've covered the power, ground, and factory speaker connections for your new stereo. You'll also be able to keep your backup camera (if present) in select vehicles. This adapter has RCA jacks to connect to your car stereo's rear aux input; you'll need an RCA-to-miniplug adapter if your stereo has a minijack.

Product highlights:

  • connect a new stereo in select 2003-up Toyota-built vehicles
  • retain your steering wheel controls with select car stereos
  • retains factory aux input
  • retains JBL amplifier (does not retain fader control)
  • retains backup camera (if present) in select vehicles
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # CS-TJ20

What's in the box:

  • Radio replacement interface
  • TY-A harness
  • TY-B harness
  • Camera retention harness
  • 16 to 24-Pin camera harness
  • SWC harnes (Kenwood/JVC/Clarion/Alpine)
  • SWC harness (Pioneer/Sony)
  • Boss radio SWC connector
  • Installation Instructions

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Crutchfield response

<< >>

More details on the Crux CS-TJ20 Wiring Interface

Stacey B.
The Crux CS-TJ20 Wiring Interface replaces these items:

Product Research


Radio Replacement Interface: The CRUX CS-TJ20 is a radio replacement interface for select Toyota and Lexus vehicles with factory JBL audio systems. It facilitates the integration of an aftermarket radio and enables retention of factory features when replacing a factory installed radio in select Toyota and Lexus vehicles featuring factory JBL audio systems. The CRUX CS-TJ20 is also pre-programmed for retention of factory steering wheel controls.

Vehicle Compatibility: The CRUX CS-TJ20 radio replacement interface works with the following 2003-2017 Toyota and Lexus vehicles featuring factory JBL audio systems.

Make Model Year
Toyota 4 Runner 2003-2019
Avalon 2005-2018
Camry 2007-2017
Camry Solara 2004-2008
Corolla 2009-2017
FJ Cruiser 2007-2014
Highlander 2008-2018
Matrix 2005-2012
Prius 2004-2017
Rav4 2004-2018
Sequoia 2005-2018
Sienna 2004-2016
Tacoma 2005-2019
Tundra 2004-2019
Venza 2009-2015
Yaris 2008-2011
Lexus ES300 2004-2006
IS300 2003-2005
LS430 2006 (does not retain steering wheel controls)
Note: The CRUX CS-TJ20 comes with two types of wiring harnesses (TY-A and TY-B). The TY-A harness is used for newer model vehicles only, while the TY-B harness is for older model vehicles only. You will only use one; not both.

Retains Factory Amplifier: The CRUX CS-TJ20 will retain your vehicle's factory JBL Harman-Becker Digital-Synthesis Amplifier, including JBL (Pioneer-made) amplifiers. Use the three gain adjustment dip-switches to level match your aftermarket head unit's output with the factory amplifier's input. Balance (left/right) control is supported. However, fading (front/rear) control is not supported and lost when replacing the factory radio with an aftermarket head unit.

Retains Steering Wheel Controls: The CS-TJ20 will retain your vehicle's factory steering wheel controls. Two steering wheel control harnesses are included, but only one will be used based on your brand of aftermarket head unit (see Installation Instructions). You will also need to configure the CS-TJ20's three dip-switches based on your brand of aftermarket head unit (see Installation Instructions). Retained steering wheel control functions will vary by brand of aftermarket head unit (some functions require short or long button press).

  • Power/On Off
  • Source
  • Volume Up/Down
  • Mute
  • Track/Seek Up, Track/Seek Down (including Presets)
  • Pick Up/End Call
  • Voice Control (requires aftermarket head unit with Siri or Android control)
Note: The CS-TJ20 is compatible with Alpine, Clarion, Boss, Dual/Axxera, JVC, Kenwood, Jensen, Pioneer, and Sony aftermarket head units with steering wheel control wire or input.

Retains Factory Aux Input: The CS-TJ20 lets you retain your vehicle's factory Auxiliary Input through the use of your aftermarket head unit's rear-panel Aux input. The CS-TJ20 is outfitted with stereo RCA jacks, so if your aftermarket head unit features a 3.5mm jack, you will need a RCA-to-Minijack adapter (sold separately).

Retains Factory Backup Camera: The included TY-A harness features a composite video jack and a 12V-to-6V voltage converter to retain your vehicle's factory backup camera (if equipped). Your aftermarket head unit will need a composite video camera input to retain your vehicle's camera backup camera.

Note: The included TY-B harness does not retain the factory backup camera.

Navigation Outputs: The included TY-A harness provides a Parking Brake, VSS (vehicle speed sense), and a Reverse Gear output to make installing an aftermarket navigation head unit simpler and less time consuming.

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Customer Q&A

5 questions already asked

What do i connect the steering wheel remote input wire off the radio to in an 03 tubdra?
[ Logan  Aug 14, 2021 ]
1 answer
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the connections on the product. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
[ Kenny  Aug 16, 2021 ]  Staff
I have it but I don't know what number to put to make it work on my 2004 limited toyota 4runner. can you help me with this? I will appreciate it
[ Ronni  Mar 18, 2021 ]
1 answer
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question.
[ Calvin  Mar 30, 2021 ]  Staff
Will this work on a 2010 scion tc?
[ Paul  Jan 21, 2021 ]
1 answer
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you.
[ Calvin  Feb 09, 2021 ]  Staff
If I pre set my fade on my existing head unit will the fade settings stay once I install this and the new head unit? If so I understand that I will not be able to adjust it with out plugging in old head unit.
[ Patrick  Oct 31, 2020 ]
1 answer
I honestly have had non-stop issues with it. Some days it works and other days it doesn't. I wish I could give you better information. I'm about to swap it out for another brand. My install guy agrees.
[ GUY  Nov 01, 2020 ]
I have a 2006 toyota sequoia with JBL. Will this work? And will i need something else to use the steering wheel controls? Thanks.
[ madjassah  Apr 21, 2020 ]
1 answer
It worked on my 2005 Seinna with JBL system. Steering wheel controls work. Only thing that doesn't work is fade front to back.
[ Brian  Apr 21, 2020 ]

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