PAC RadioPRO4 RP4.2-TY11, Manual, Page: 19 / 24

Radio Replacement and
Steering Wheel Control Interface
for Toyota / Lexus / Scion Vehicles
RP4.2-TY11
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 flash 3 times.
Optional Steering Wheel Control Programming
If 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 interface must be programmed in the specific 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 flash off and on confirming 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.
Programmable 12v Output
The Red / White wire on the interface can be programmed via the RadioPRO app to do a pulsed, or latched 12v output, which
can then be assigned to any of the vehicle’s factory SWC buttons. When assigned, the factory SWC button will activate the
pulsed or latched output to control external accessories. Please refer to page 7 for more details on how to use the app to set
this feature.
Steering Wheel Controls
Alpine JVC Kenwood Clarion Pioneer Sony Fusion
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 Mute VR Mute 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
Arrow Right Preset Up Disc Up Disc Up N / P Preset Up Preset Up N / P
Default SWC Button Assignments
Installation Steps (cont.)
6. Once all connections have been made, plug the interface into the vehicle.
7. Turn the ignition on and set the gain on the side of the interface to the desired level. See “Testing & Verification” 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.
8. If you wish to reassign functions to the SWC, or utilize short press long press dual command functionality, follow the
programming instructions below.