RadioPRO RP4.2-HY11

Introduction & Features

The RP4.2-HY11 interface allows the replacement of a factory radio in select Hyundai vehicles. Using this interface will retain factory features such as: steering wheel controls (SWC), secondary screens, reverse camera and factory SPDIF audio amplifier (seperate part required, part # RPA-SPDIF) whenever the original radio is removed. Use of this interface also allows you to program two radio functions to each SWC button by using short press long press dual command functionality. The RP4.2-HY11 also provides data bus driven outputs such as retained accessory power (RAP), vehicle speed sensor (VSS), illumination, reverse trigger and parking brake.

Important Notes

• Not compatible in any car with factory navigation.
• Does not retain Blue Link. You must use the RP5.2-HY11 to retain Blue Link.
• The Hyundai Veloster requires the RP4.2-HY12.
• You must connect the HS-CAN wires at the ODBII connector to receive nav signals (reverse, parking brake, VSS) or the programmable trigger options (foot brake, various vehicle triggers). If you do not require these signals then it is not necessary to connect these wires.
• The AUX connection in the RP4 harness will only provide sound if the aftermarket radio has a USB port. This is because the USB port provides the power to make the factory USB/AUX port work. If you have connected the USB plug to your aftermarket radio and it is still inoperable, this means that the aftermarket radio's USB port is not supplying enough current.
• When using the RPA-SPDIF in factory amplified vehicles, you can adjust factory amplifier settings such as Bass, Mid, Treble, Fader, Balance and Gain with the RadioPRO app found at www.pac-audio.com. Please refer to page 6 for detailed instructions on the app and the functionality of this wire.
• The following vehicles have a speed based Parking Brake output that will automatically disengage once the vehicle is going over 3 MPH: 2010-2014 Hyundai Sonata, Hyundai Accent
• In the following vehicles the external screen will power up and display "Aux". You will also lose the ability to set the factory clock: Genesis Coupe, 2010-2014 Hyundai Sonata
• In the following vehicles, the external screen will power up and display "Hyundai". The climate control display will also be retained: Hyundai Azera

Wiring Connection Chart

Module Layout & Installation

Module Layout

The module features a compact design with several key components:

• Radio Select Dipswitches: Located on the side for setting the correct radio manufacturer.
• USB Port: For firmware updates and app connectivity.
• Programming Button: Used for SWC programming and calibration.
• Interface Connector 1: Connects to the vehicle's harness.
• Expansion Port: For optional modules.
• Interface Connector 2: Connects to the vehicle's harness.
• Module Status LED: Indicates interface status.
• Programmable Output/USB Status LED: Indicates USB status and programmable output activity.

Radio Select Dipswitches

Before connecting the interface, set the dipswitches according to your aftermarket radio brand:

Note: "Other" brands include Advent, BOYO, Dual, Lightning Audio, Rockford Fosgate, & Visteon.

Installation Steps

1. Adjust the radio select dipswitches on the side of the interface to match your aftermarket radio brand.
2. Make all connections as described in the wiring chart on page 1.
   • Vehicles without a factory amplifier: Connect the aftermarket radio's front and rear speaker wires to the vehicle connector.
   • Vehicles with a factory amplifier: Connect the aftermarket radio's front speaker wires to the SPDIF converter (sold separately, part # RPA-SPDIF), then connect the SPDIF converter to the 6-pin connector located on the RP4.2 harness.
3. Connect the White/Red wire to pin 6 and the White/Black wire to pin 14 in the OBDII connector. (Refer to Fig. 1)
4. Connect the SWC wire to the aftermarket radio (the aftermarket radio must support a wired remote input).
5. Once all connections are made, plug the interface into the vehicle.
6. If you wish to reassign functions to the SWC, utilize short press/long press dual command functionality or assign the programmable 12v output to a SWC button. Follow the optional programming instructions on the next page.

Fig. 1: Diagram shows the OBDII connector with pin 6 and pin 14 highlighted for connection.

Steering Wheel Controls (SWC)

Default SWC Programming

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 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.

Default SWC Button Assignments

Note: The default assignments for 'Other' brands (Advent, BOYO, Dual, Lightning Audio, Rockford Fosgate, & Visteon) are listed in the 'Optional Programming Order' table on page 4.

Optional Steering Wheel Control Programming

If you wish to re-assign 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 4. If a function listed in the chart is not present on your steering wheel, or you do not wish to program it, press and release the programming button to skip that function. The LED will flash to confirm the skip and readiness for the next function.

Short Press Long Press Dual Command Functionality

This feature allows assigning two aftermarket radio functions to each SWC button. A quick press initiates the short press command, while holding the button for over two seconds initiates the long press command. No long press commands are programmed by default.

Programmable 12v Output

The red/white wire can be programmed via the RadioPRO app to provide a pulsed or latched 12v output, assignable to any factory SWC button. Pressing the assigned button activates the output to control external accessories. Refer to page 6 for app details.

Optional SWC Programming Procedure

1. Turn the key to the ignition position.
2. Press and release the programming button on the side of the interface. The Status LED will turn green.
3. Within 7 seconds, press the steering wheel button to be learned. The LED will turn red when pressed.
   • 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; the LED will go back to solid.
4. To program more buttons, repeat step 3 for each additional function.
5. If a function is not on your steering wheel or you don't want to program it, press and release the program button to skip.
6. Once programming is completed, wait seven seconds. The LED will flash three times to indicate completion.
7. Test the interface for proper functionality. The LED on the interface should blink when any SWC is pressed. If any function fails, repeat the programming steps.

Optional Programming Order

*Other = Advent, BOYO, Dual, Lightning Audio, Rockford Fosgate, & Visteon

SWC Re-Calibration

SWC re-calibration is necessary when SWC operation in vehicles with analog SWC is erratic or non-existent. This process re-calibrates SWC values to the RP4 interface for button function assignment. The interface must be programmed in the specific order shown in the chart above. If a function is not present on your steering wheel, press and release the program button to skip it. The LED will flash to confirm the skip.

The SWC and radio command assignments can be restored to default values by entering re-calibration mode (Steps 1-2) and not pressing any buttons. After 7 seconds, the re-calibration mode will time out and default values will be restored.

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. Release the button when it blinks. The LED will light solid amber. (Note: For CAN-Bus SWC, the LED may go directly to blinking red without blinking amber.)
3. Within 7 seconds, press and hold the steering wheel button to be learned. The LED will turn off when pressed and begin blinking when the value is learned. Release the button once it blinks.
4. To program more buttons, repeat step 3 for each additional function.
5. If a function is not on your steering wheel or you don't want to program it, press and release the program button to skip.
6. Once programming is completed, wait seven seconds. The LED will flash to indicate completion.
7. Test the interface for proper functionality. The LED on the interface should blink when any SWC is pressed. If any function fails, repeat the programming steps.

Button Programming Order (for Re-Calibration)

• Volume Up
• Volume Down
• Track Up
• Track Down
• Mode
• Mute
• Voice
• End Call
• Answer Call
• Power

After re-calibration, default SWC button assignments are restored. For re-assignment, use the programming process on page 4.

Testing & Verification

• Turn the ignition on. The interface LED and +12v accessory wire should turn on.
• Turn on the radio and check balance & fade. (Note: For factory amplified systems, use the Radio PRO App to adjust amplifier settings. Verify the factory subwoofer is playing.)
• Verify that all SWC are functioning properly.
• Verify that the programmable 12v+ output is functioning as intended.
• The LED & radio will turn off when the ignition is turned off.

Restoring Factory Settings

To restore factory defaults, press and hold the programming button until the status LED starts blinking red. Release the button while it is blinking red. This resets SWC Mapping, SWC Calibration, Programmable 12v+ Output (Latched), Parking Brake Output Settings, and Factory Amplifier Settings.

RadioPRO App

Use of the RadioPRO App in Hyundai allows for the following:

• Configure User Interface Options, such as: Red/White wire output behavior, Aftermarket radio Parking Brake Sequencing, Factory amplifier settings (Bass, Mid, Treble, Gain, Fader & Balance).
• Update Product Firmware.
• Read Firmware/Hardware Versions.
• Access Product User Manuals.

Programmable Red/White Wire

The red/white wire can be programmed for a pulsed or latched 12v+ trigger, controlled by a user-assigned SWC button or triggered by the vehicle's foot brake, door, or trunk. Available triggers depend on vehicle data bus information. Restoring factory settings defaults this wire's output back to a latched SWC trigger.

Output Options:

• Trunk: 12v+ output when HS-CAN is active and the trunk is opened.
• Alpine: Works with parking brake output for settings menu access. Requires actual parking brake engagement. Can be manually triggered via "Foot Brake" setting if available.
• Door: 12v+ output when HS-CAN is active and any door is opened.
• Footbrake: 12v+ output when HS-CAN is active and the foot brake is pressed. (Note: Sonata Hybrid may not provide this output.)
• Latched: A latched 12v+ output tied to an SWC. Turns on when the SWC is pressed and remains on until the SWC is pressed again or ignition is turned off.
• Pulsed: A user-programmable timed 12v+ output. The red/white wire pulses for a pre-programmed time (0.1-25.5 seconds) when the assigned SWC is pressed.

Pioneer Parking Brake

Enabling this feature uses the parking brake output for sequencing settings menu access, based on actual parking brake engagement. Leave this feature off for manual sequencing. Factory settings default this to off.

Factory Amplifier Settings

The RadioPRO app allows adjustment of factory amplifier settings: Amp Gain, Fader, Balance, Bass, Mid & Treble. (Note: For fader adjustment in amplified vehicles, the RP5.2-HY11 must be used.) Factory settings default all values to middle.

Firmware Updates

The RadioPRO app can update the interface firmware. Visit www.pac-audio.com or contact tech support for updates.