PAC RP4.2-TY11 User Manual

Radio Replacement and

Steering Wheel Control Interface

for Toyota / Lexus / Scion Vehicles

RP4.2-TY11

Introduction & Features

The RP4.2-TY11 interface allows the replacement of a factory radio in select Toyota/Lexus/Scion vehicles and will retain

factory features such as steering wheel controls (SWC) and the factory audio amplier. This interface also allows you to

program two radio functions to each SWC button by using short press long press dual command functionality, and also
provides outputs such as: vehicle speed signal (VSS), illumination, reverse trigger and parking brake.

Important Notes

1. These instructions only apply to R.2.1.1.43 or later revisions. The revision info can be found on a small white sticker on the
interface and packaging.

2. Connection of the White / Red and White / Black wires is not always necessary. Use of these wires will be dependent on whether

or not the aftermarket radio requires specific connections, and whether the vehicle provides these outputs at the radio. See the
“Installation Steps” section starting on page 3 for additional information.

3. Adjustment of the vehicle settings through the original radio’s vehicle settings menu will be disabled after installation of the new
radio. It is advised to make sure all settings are as you desire prior to removal of the original radio.

4. The RP4.2-TY11 does not retain Rear Seat Entertainment.

5. After installation, if you do not initially hear any audio, you may need to cycle the ignition again to initialize the factory amplifier.

6. Speaker fading on factory amplified systems is only supported with the “amplified output” connection of the RP4.2-TY11.

7. When using real time fade, if the fader setting is biased more to the front or rear, as the radio turns on the sound may begin at

the default setting and then quickly transition to your custom setting.

8. Aftermarket radio features such as High Pass Filters (crossovers), DSP or “Network Mode” will interfere with proper fader
function. In order for the RP4.2-TY11’s fader function to work, the audio from the aftermarket radio’s output must match so it can
compare the front and rear audio levels and determine the proper fader setting for the factory amplifier.

9. The USB-TY1 or USB-TY2 must be purchased in order to retain the factory USB port.

10. The CAM-TY11 or CAM-TY12 must be purchased in order to retain the factory reverse camera.

Module Layout

Interface Connector 4

Interface Connector 1

Expansion Port

Interface Connector 2

Non-Amplied Audio Output

Amplied Audio Output Level Adjustment

Radio Select DIP switches

Programming Button

USB Port

Module Status LED

Amplied Audio Output

USB Status LED

Radio Replacement and

Steering Wheel Control Interface

for Toyota / Lexus / Scion Vehicles

RP4.2-TY11

Interface Connectors

Interface Connector 1

Plug Interface Connectors 1, 2 and 4 into the appropriate port on the RP4.2-TY11 interface (using the diagram on page 1 or

the label on the bottom of the RP4.2-TY11 interface). The Connector 3 connection will be dependent upon whether or not the

vehicle has a factory amplied system. Connect to the appropriate port on the RP4.2-TY11.

Interface Connector 2

Interface Connector 3

Interface Connector 4

Vehicle Connectors

Vehicle Connector 1

Depending on the application, the RP4.2-TY11 will need 2 or 3 of the 5 vehicle connectors. The additional connectors will be

left unused on the harness. Any additional radio harnesses in the vehicle that do not plug into one of the vehicle connectors

shown above, will not be used. Below you will nd the typical combinations needed for most vehicles.

Vehicle Connector 2

Vehicle Connector 3

Vehicle Connector 4

Vehicle Connector 5

Combination 1

Typical 2004 to 2013 NON-AMPLIFIED

Vehicle Connector 3 Vehicle Connector 4 Vehicle Connector 5

Combination 2

Typical 2004 to 2013 AMPLIFIED

Vehicle Connector 1 Vehicle Connector 3

Combination 3

Typical 2014 to 2017 AMPLIFIED AND NON-AMPLIFIED

Vehicle Connector 2

Vehicle Connector 4

Vehicle Connector 5

Radio Replacement and

Steering Wheel Control Interface

for Toyota / Lexus / Scion Vehicles

RP4.2-TY11

Installation Steps

Set DIP switches that correspond with your radio to the ON position.
Set all other DIP switches to the OFF position.

Alpine JVC Kenwood

Other =

1 2 1 & 2 3 1, 2, & 3 4 1 & 4

Other =

Advent, BOYO, Dual, Lightning Audio, Rockford Fosgate, Visteon

Advent, BOYO, Dual, Lightning Audio, Rockford Fosgate, Visteon

Clarion /

Nakamichi

Pioneer /

Other*

* Other - Advent, BOYO, Dual, Jensen, Lightning Audio, Rockford Fosgate, Visteon

1. Set the Radio Select DIP switches according to the radio you are installing.

2. Wire the aftermarket radio harness per the tables to the right and the information

below. If the aftermarket radio does not require connections for Vehicle Speed
Sense, Parking Brake, or Reverse Signal, proceed to step “3”.

a. If the vehicle does not use the 28 pin connector (Vehicle Connector 2), proceed

to step “III” below. There are three different methods for obtaining the analog

navigation outputs from the interface:

I. Vehicles that have the analog signals at the radio: Plug the 28 pin con-

nector (Vehicle Connector 2) from the RP4.2-TY11 into the vehicle harness.

Find the Pink (pin 17), Light Green (pin 15) and Purple / White (pin 2) wires

in the RP4.2-TY11 harness and check for wires populating these positions

on the factory side of the connector. If the wires are present, you can use

the analog navigation outputs coming from the Vehicle Connector in the PAC
harness.

II. Vehicles that have CAN data at the radio: Plug the 28 pin connector (Vehicle

Connector 2) from the RP4.2-TY11 into the vehicle harness. Find the White
/ Red (pin 9) and White / Black (pin 10) wires in the RP4.2-TY11 harness and
check for wires populating these positions on the factory side of the connector.

If the wires are present, you can use the “nav wires” coming from Vehicle

Connector 2 in the PAC harness.

III. Vehicles that do not have the CAN data or the analog wires at the radio:

Connect the long White / Red HS-CAN+ wire to pin 6 and the long White /
Black HS-CAN- wire to pin 14 in the OBDII connector (Fig.1). This will allow for
use of the “nav wires” coming from Interface Connector 4 in the PAC harness.

3. Wire the Yellow, Red, and Black wires from the harness labeled “Connect to Aftermarket
Radio” to the wires on the aftermarket radio harness.

4. Wire the speaker wires from Interface Connector 4 to the speaker wires on the
aftermarket radio harness.

5. Wire the Blue / White wire from Interface Connector 4 to the amp turn on lead of your

aftermarket radio. Insulate the unused wires and ignore the remaining Brown Loop

(not needed).

6. Depending on the aftermarket radio, either the Blue / Yellow wire or the 3.5 mm
Jack (not both) SWC Outputs will be used.

7. Once all connections have been made, plug the interface into the vehicle.

8. Turn the ignition on and set the gain on the side of the interface to the desired level.

See “Testing & Verication” section on page 6 for further details on how to set the
gain. If the radio does not turn on and the LED on the interface is solid orange, check
the DIP switches on the side of the interface to make sure they are not all in the on

position.

9. If you wish to reassign functions to the SWC, or utilize short press long press dual
command functionality, follow the programming instructions on the following page.

Sony Fusion

Aftermarket Radio Wiring Table
Wires from Interface

Connector 4

Purple Rear R + input

Purple / Black Rear R - input

Green Rear L + input

Green / Black Rear L - input

Gray Front R + input

Gray / Black Front R - input

White Front L + input

White / Black Front L - input

Blue / Yellow SWC Output

3.5 mm Jack SWC Output

Pink Vehicle Speed

Light Green Parking Brake

Violet / White Reverse Signal

Orange / White Illumination Output

Blue / White Amp Turn On Input

Sense Output

Output

Output

Wires Labeled “Connect To

Aftermarket Radio”

Yellow 12v+

Red

Black Ground

Pink Vehicle Speed

Light Green

Violet / White Reverse Signal

Accessory Output

(10 amp)

Sense Output

Parking Brake

Outpu

Output

t

CAN Input Wires

White / Red HS CAN + Input

White / Black HS CAN - Input

Radio Replacement and

Steering Wheel Control Interface

for Toyota / Lexus / Scion Vehicles

RP4.2-TY11

Alpine JVC Kenwood Clarion Pioneer Sony Fusion

Arrow Right Preset Up Disc Up Disc Up N/P Preset Up Preset Up N/P

Steering Wheel Controls

Default Steering Wheel Control Programming

IMPORTANT! The interface comes pre-programmed for all of the vehicles factory SWC functions and does not require

programming unless you wish to re-assign the SWC functions, utilize short press long press dual command functionality, or
assign the programmable 12v output to a SWC button. The SWC can always be restored to default settings by pressing and

releasing the program button on the side of the interface once and waiting 7 seconds for the LED to ash 3 times.

Default SWC Button Assignments

Volume + Volume + Volume + Volume + Volume + Volume + Volume + Volume +
Volume - Volume - Volume - Volume - Volume - Volume - Volume - Volume ­Mode Source Source Source Source Source Source Source
Back Band Att Play Band Band Band N/P
Voice VR Mute Mute VR VR VR Mute
Answer Receive Receive Off Hook Send Answer Answer Power
End End Reject On Hook End End Reject/Source N/P
Enter Power Power Preset Up N/P Mute N/P Power
Arrow Up Track Up Track Up Track Up Track Up Track Up Track Up Track Up
Arrow Down Track Down Track Down Track Down Track Down Track Down Track Down Track Down
Arrow Left Preset Down Disc Down Disc Down N/P Preset Down Preset Down N/P

Optional Steering Wheel Control Programming

If you wish to re-assign the SWC functions, utilize short press long press dual command functionality, the interface must be
programmed in the specic order shown in the chart on page 5. If you come across a function in the chart that your steering
wheel does not have, or you do not want to program, press and release the programming button on the side of the interface to
skip that function. The LED will ash off and on conrming that you have successfully skipped that function and are ready to

proceed to the next one.

Short Press Long Press Dual Command Functionality

This feature allows you to assign two aftermarket radio functions to each of the vehicles SWC buttons. It can be used with as
many of the buttons as the user likes or none at all. When this functionality is implemented, quickly pressing and releasing a
SWC button will initiate the short press command while pressing and holding a SWC button for longer than two seconds will

initiate the long press command. Please note that no long press commands are programmed by default. If you wish to assign

dual command functionality to the SWC please follow the programming steps below.

Radio Replacement and

Steering Wheel Control Interface

for Toyota / Lexus / Scion Vehicles

RP4.2-TY11

Alpine JVC Kenwood Clarion Other * Pioneer Sony Fusion

1 Volume + Volume + Volume + Volume + Volume + Volume + Volume + Volume +
2 Volume - Volume - Volume - Volume - Volume - Volume - Volume - Volume ­3 Mute Mute Mute Mute Mute Mute Mute Mute
4 Preset + Source Source Source Preset + Preset + Preset + Source
5 Preset - Track + Play Search + Preset - Preset - Preset - Track +
6 Source Track - Track + Search - Source Source Source / End Call Track ­7 Track + Band / Disc + Track - Band Track + Track + Track + Audio
8 Track - Preset / Disc - Disc / FM + Send / End Track - Track - Track - Power

9 Power Select Disc / AM - Send Band Band Band
10 Enter / Play Attenuation Answer End Answer ** Phone Menu Power / End Call
11 Band / Program Phone Receive Voice Dial VR End ** Answer Call Voice Dial / Answer / End Call

12 Receive Phone Reject On Hook PTT ** End Call

VR (Android Auto & Car Play)

Answer / End Call***
13 End Voice Dial Off Hook VR
14 VR Power Mute
15 Preset +

* Advent, Boyo, Dual, Lightning Audio, Jensen, Rockford Fosgate & Visteon ** Jensen & Advent ONLY ***



XAV-AX100 Only

r

Steering Wheel Controls (cont.)

Optional SWC Programming Procedure

1. Turn the key to the ignition position.

2. Press and release programming button on the side of the interface. The Status LED will turn green.

3. Within 7 seconds, press the button that is to be learned on the steering wheel. The LED will turn red when the button is pressed.

At this point you have two options:

A. For short press functionality: Release the button within 1.5 seconds. The LED will turn back on.
B. For long press functionality: Hold the button until the LED starts blinking. Release the button and the LED will

go back to solid.

4. If you need to program more buttons, repeat step 3 for each additional audio function on the steering wheel.

5. If you come across a function in the chart that your steering wheel does not have, or you do not want to program, press and

release the program button on the side of the interface to skip that function.

6. Once programming is completed, wait seven seconds. The LED will ash three times indicating end of programming.

7. Test the interface for proper functionality. Whenever a SWC is pressed the LED on the interface should blink. If any function

does not work, repeat the programming steps.

Optional Programming Order

SWC Re-Calibration Procedure

1. Turn the key to the ignition position.

2. Press and hold the programming button until the LED begins blinking amber.

When the LED begins blinking, release the programming button. The LED will

light solid amber.

3. Within 7 seconds, press and hold the button that is to be learned on the steering

wheel. The LED will turn off when the button is pressed and begin blinking when
the value has been learned. Once the LED begins blinking, release the button.

Please Note: the buttons must be calibrated in the order shown in the chart.
If you press the wrong button the LED will not respond at all.

4. If you need to program more buttons, repeat step 3 for each additional audio

function on the steering wheel.

5. If you come across a function in the chart that your steering wheel does not

have, press and release the program button on the side of the interface to skip

that function.

6. Once programming is completed, wait seven seconds. The LED will ash

indicating end of programming.

7. Test the interface for proper functionality. Whenever a SWC is pressed the

LED on the interface should blink. If any function does not work, repeat the

programming steps.

After you have re-calibrated the SWC buttons, the default SWC button assignments will be the same as what is listed in the
chart on page 4. If you wish to re-assign button functions you must also go through the programming listed above (Optional
SWC Programing Procedure).

Re‐CalibrationProgrammingOrde

VolumeUp
VolumeDown
SeekUp
SeekDown
Mode
Voice
PhoneAnswer
PhoneHangUp
Enter
Back
ArrowRight
ArrowLeft

Radio Replacement and

Steering Wheel Control Interface

for Toyota / Lexus / Scion Vehicles

RP4.2-TY11

Testing & Verication

1. Turn the ignition on. The LED on the interface will turn on and the +12v accessory wire will turn on.

2. Turn on the radio and check volume, balance and fade.If you do not hear any audio you may need to cycle the ignition to

initialize the factory amplier.

3. If the overall volume is too low, use the gain adjustment on the side of the RP4.2 interface to set it to the desired level. The
best way to do this is to turn the volume on the radio to 3/4 volume, then turn the gain on the RP4.2 until some distortion is
heard, then back it down a little.

4. If you have a JBL system and there is no audio, please make sure the Blue / White remote wire in the radio connector is
hooked up properly. If there is still no audio, reset the interface according to the procedure in the next section.

5. If fading is acting inconsistent, please ensure that all speakers are connected to the proper polarity.

6. Verify that all SWC are functioning properly. If any of the SWC are not functioning properly you may need to reset the
interface or follow the re-calibration procedure above.

7. The LED and radio will turn off when the ignition is turned off.

Restoring Factory Settings

You can restore the interface to factory default settings by pressing and holding the programming button on the side of the module

until the status LED starts blinking red. Once the LED starts blinking red, release the button. You must release the button while
the LED is blinking red in order to perform the reset. Please note, the LED will go through two stages before it starts blinking red.
First it will blink green, then amber, then red.

This reset will restore the following settings to their factory defaults:

• SWC Mapping

• Parking Brake Output Settings

• Factory Amplier Settings

• Real Time Fade will be reset to on

RadioPRO App

Use of the RadioPRO App allows
you to do the following:

• Congure User Interface Options such

as:

• Aftermarket radio Parking Brake

Sequencing

• Factory amplier settings (Bass,
Mid, Treble, Gain, Fader and

Balance)

• Real Time Fading

• Update Product Firmware

• Read Firmware/Hardware Versions

• Access Product User Manuals

PLEASE NOTE:
The interface must be connected to the vehicle when using the following features of the Radio PRO App:

• Factory Amplier Settings

The interface does not need to be connected to the vehicle when using the following features of the Radio PRO App:

• Firmware Updates

• Reading rmware/hardware versions

Radio Replacement and

Steering Wheel Control Interface

for Toyota / Lexus / Scion Vehicles

RP4.2-TY11

Func on P in Wire Color

Camera Power 6V + 7 Black
Video + 8
Camera Ground 15 Shield
Video - 16

Red

White

RadioPRO App (cont.)

Infotainment/Factory Amplier Settings

The RadioPRO app will also allow you to adjust the
settings of the factory amplier. You can adjust Amp
Gain, Fader, Balance, Bass, Mid and Treble and real
time fade. When real time fade is enabled in amplied
systems, it will allow fading to be controlled directly

from the aftermarket radio. Restoring factory settings
on the module will default all values back to middle.

Firmware Updates

The RadioPRO app will also allow you to update the
interface with new firmware as it becomes available.

In order to update the interface all DIP switches must be set to the down position. Connect the interface to your PC and select
“Update Firmware”. Now select “Select File”. Finally, browse to the place where you saved the file and select it. This will begin
the updating process. Once finished, disconnect the interface from the PC and set the DIP switches back according to the
radio you have installed.

Appendix A

Reverse Camera Retention

If you do not have the CAM-TY11 or CAM-TY12 harness available, follow the schematics below to retain the factory reverse
camera. Older vehicles (pre 2014) will be equipped with the 16-pin harness (Fig. 1) and newer vehicles (2014+) will be
equipped with the 24-pin harness (Fig.2). Some years may overlap.

You can obtain the necessary 6v+ and ground for the factory camera from twisted Yellow / Black and Black wires labeled “OEM
CAMERA POWER” in Interface Connector 2.

Connectors are viewed from wire side

Fig. 1

Func on P in Wire Color

Camera Power 6V + 7 Black
Video + 8
Camera Ground 15 Shield
Video - 16

Red

White

Fig. 2

Func on P in Wire Color

Camera Power 6V+ 11 Red
Video + 12 White
Camera Ground 23 Shield
Video - 24 Black

Radio Replacement and

Steering Wheel Control Interface

for Toyota / Lexus / Scion Vehicles

RP4.2-TY11

Introduction & Features

The RP4.2-TY11 interface allows the replacement of a factory radio in select Toyota/Lexus/Scion vehicles and will retain

factory features such as steering wheel controls (SWC) and the factory audio amplier. This interface also allows you to

program two radio functions to each SWC button by using short press long press dual command functionality, and also
provides outputs such as: vehicle speed signal (VSS), illumination, reverse trigger and parking brake.

Important Notes

1. These instructions only apply to revision 1.1.1.37 of the firmware. The revision info can be found on a small white sticker on the
interface and packaging.

2. Connection of the White / Red and White / Black wires is not always necessary. Use of these wires will be dependent on whether
or not the aftermarket radio requires specific connections, and whether the vehicle provides these outputs at the radio. See the
“Installation Steps” section starting on page 3 for additional information.

3. Adjustment of the vehicle settings through the original radio’s vehicle settings menu will be disabled after installation of the new
radio. It is advised to make sure all settings are as you desire prior to removal of the original radio.

4. The RP4.2-TY11 does not retain Rear Seat Entertainment.

5. After installation, if you do not initially hear any audio, you may need to cycle the ignition again to initialize the factory amplifier.

6. Speaker fading on factory amplified systems is only supported with the “amplified output” connection of the RP4.2-TY11.

7. When using real time fade, if the fader setting is biased more to the front or rear, as the radio turns on the sound may begin at

the default setting and then quickly transition to your custom setting.

8. Aftermarket radio features such as High Pass Filters (crossovers), DSP or “Network Mode” will interfere with proper fader
function. In order for the RP4.2-TY11’s fader function to work, the audio from the aftermarket radio’s output must match so it can
compare the front and rear audio levels and determine the proper fader setting for the factory amplifier.

9. The USB-TY1 or USB-TY2 must be purchased in order to retain the factory USB port.

10. The CAM-TY11 or CAM-TY12 must be purchased in order to retain the factory reverse camera.

Module Layout

Interface Connector 4

Interface Connector 1

Expansion Port

Interface Connector 2

Amplied Audio Output Level Adjustment

Radio Select DIP switches

Programming Button

USB Port

Module Status LED

USB Status LED

Non-Amplied Audio Output

Amplied Audio Output