RP4-HD11 - Car audio interface PAC - Free user manual and instructions

Product Type	Aftermarket radio interface for Honda vehicles with MSCAN databus
Compatible Vehicles	Select Honda models equipped with MSCAN databus (e.g., Civic, CR-V)
Dimensions (approx.)	4.0 x 3.0 x 1.0 inches
Weight (approx.)	0.5 lb
Power Input	12V DC (vehicle battery)
Accessory Output	1 amp max
Outputs	Vehicle Speed Sensor (VSS), Illumination (+), Reverse (+), Parking Brake (-)
Steering Wheel Control (SWC) Support	Retains factory SWC with short press/long press dual command capability
Factory Amplifier Retention	Yes (for Premium Audio systems)
Factory Clock Setting	Retained via interface (except with 7" touchscreen display)
Radio Compatibility	Alpine, JVC, Kenwood, Clarion, Pioneer, Sony, Fusion, Advent, BOYO, Dual, Lightning Audio, Rockford Fosgate, Visteon
SWC Connection	Wired remote input (3.5mm jack or Blu/Yel wire)
LED Indicator	Flashes when SWC button is pressed
Programming Method	On-board programming button; SWC re-calibration available
Firmware Update	Via PAC-UP interface updater (sold separately)
Installation	Professional installation recommended; ensure rotary switch set correctly
Warranty	Limited lifetime warranty (contact PAC-Audio)
Manual Languages	English (other languages available via request)

Frequently Asked Questions - RP4-HD11 PAC

What is the PAC RP4-HD11 used for?

The RP4-HD11 is an interface that allows you to replace the factory radio in select Honda vehicles while retaining steering wheel controls, the factory amplifier, and clock setting functionality.

Which vehicles are compatible with the RP4-HD11?

It is compatible with Honda vehicles that use the MSCAN databus, such as certain models of Civic and CR-V. Please check the PAC-Audio website for a full vehicle list.

How do I install the RP4-HD11?

First, set the radio select rotary switch to match your aftermarket radio brand. Then make wiring connections according to the chart in the manual, connect SWC, and secure the interface. Detailed steps are in the user manual.

Do I need to program the steering wheel controls?

The interface comes pre-programmed for factory SWC. Only program if you want to reassign functions or use short press/long press dual commands. Defaults can be restored by pressing the program button once and waiting 7 seconds.

How do I reprogram the steering wheel controls?

Turn ignition on, press the program button, then within 7 seconds press a SWC button. For short press, release within 1.5 seconds; for long press, hold until LED blinks. Repeat for each function. Wait 7 seconds after last to finish.

What if my steering wheel controls are not working?

Perform a SWC re-calibration: press and hold the program button for 7 seconds until LED blinks, then press each SWC button you want to learn. This recalibrates values. If still issues, check connections and wiring.

Can I use the RP4-HD11 with a factory navigation system?

Yes, but you must follow the tech brief on the PAC-Audio website for vehicles with factory navigation. Some features may be affected.

How do I update the firmware of the RP4-HD11?

Use the PAC-UP interface updater (sold separately). Set rotary switch to 0, connect PAC-UP, update, then set switch back to normal position. Check www.pac-audio.com/firmware for updates.

What should I do if my vehicle has a 7-inch touchscreen?

After removing the factory radio, the clock and date can no longer be set via the screen. To reset the screen, disconnect the battery at 1:00 PM (default time). The date can be removed by disconnecting battery to clear memory.

Where can I find the user manual for the RP4-HD11?

The manual is available for free download in PDF format from notice-facile.com or PAC-Audio's website. Other languages can be requested by email.

USER MANUAL RP4-HD11 PAC

Introduction & Features

The RP4-HD11 interface allows the replacement of a factory radio in select Honda vehicles with MSCAN databus radios. Using this interface will retain factory features such as steering wheel controls (SWC), the factory amplifier and the ability to set the factory clock when 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-HD11 also provides data bus driven outputs such as accessory power, vehicle speed sensor (VSS), illumination, reverse trigger and parking brake.

Important Notes

1. 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 (see next page for setting chart).
2. 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 or utilize short press long press dual command functionality. 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 4 times.
3. Vehicles equipped with factory navigation must follow the installation tech brief listed at www.pac-audio.com under the RP4-HD11 product page.
4. Vehicles equipped with a 7" touchscreen: Once the factory head unit has been removed you will no longer be able to set the clock or date on the factory display as this is derived from the factory head unit. The date on the screen can be permanently removed by disconnecting the battery to clear the screen's memory. In order to set the clock you will need to disconnect the vehicles battery at 1:00 as this is the time the screen defaults to once it has been reset.
5. The LED will flash whenever a SWC button is pressed.

Wiring Connection Chart

Interface Connector

Red / White	Parking Brake Output (-)
Purple / White	Vehicle Speed Output
Red	Accessory Output (1 amp)
Orange / White	Illumination Output (+)
Green	Reverse Output (+)
White/Green	SWC Analog Input

Vehicle Connector

Yellow	Battery +12v
Black	Ground
Orange	Dimmer
Orange/White	Illumination
White	Front L + input
White / Black	Front L - input
Grey	Front R + input
Grey / Black	Front R - input
Green	Rear L + input
Green / Black	Rear L - input
Purple	Rear R + input
Purple / Black	Rear R - input

SWC Connector

Blu/Yel	Kenwwod, Newer JVC
3.5mm Jack	Alpine, JVC, Clarion, Fusion, Pioneer, Sony, Boyo, Dual, Lightning Audio, Visteon or Advent

Illustration / Schematic

Wiring

SWC Connection

Installation Steps

SET RADIO SELECT SWITCH

Alpine	JVC	Kenwood	Clarion	Pioneer/Other	Sony	Fusion
1	2	3	4	7	8	9

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

IMPORTANT! If you wish to use the Voice, Answer and End buttons you must hardwire them into the RP4-HD11. The wire you need to connect into can be found by removing the plastic panels surrounding the steering wheel column and accessing the connector which houses the wire (Fig. 1). Once you have located the connector you must connect into the wire located in pin 3 (Fig. 2). Wire colors are normally Blue in the Civic & Yellow in the CRV but may vary by vehicle. Connect to the RP4-HD11 interface connector as shown in Fig. 3.

Fig. 1

Fig. 2

Fig. 3

1. 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.
2. Make all connections as described in the chart on page 1. If there is a Premium Audio system present: Connect the RCA inputs to the aftermarket radios pre-amp output. The audio level will vary depending on the new radios pre-amp output voltage (2-4 volts is recommended). If there is not a Premium Audio system present: Cut the RCA inputs off and connect the aftermarket radios speaker outputs to the remaining wire according to the chart on page 1.
3. If the vehicle is equipped with a factory subwoofer plug the RCA cables connected to the 8 pin plug into the Subwoofer or Non-Fading output of the aftermarket radio.
4. Connect the SWC wire according to the chart on page 1 (aftermarket radio MUST support a wired remote input).
5. If you wish to reassign functions to the SWC follow the programming instructions on the next page.

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 or utilize short press long press dual command functionality. 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 4 times.

Default SWC Button Assignments

	Alpine JVC	Kenwood Clarion Pionee		r	Sony	Fusion
Volume + Volume	+ Volume +	Volume + Volume +	Volume +	Volume +
Volume -	Volume -	Volume -	Volume -	Volume -	Volume -	Volume -
Source	Source	Source	Source	Source	Source	Source
Track +	Track +	Track +	Track +	Search +	Track +	Track +
Track -	Track -	Track -	Track -	Search -	Track -	Track -
Voice/Mute	Mute	Mute	Mute	Mute	Mute	Mute
Phone Answer	Receive	Receive	Answer	Send	Answer Call	Answer/End
Phone End	End	Reject	Voice	End	End	Reject/Source

Optional Steering Wheel Control Programming

If you wish to re-assign the SWC functions or utilize short press long press dual command functionality, the interface must be programmed in the specific order shown on the chart below. 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. The LED will flash off and on confirming that you have successfully skipped that function and are ready to proceed to the next one.

SET RADIO SELECT SWITCH

Alpine	JVC	Kenwood	Clarion	Pioneer/Other	Sony	Fusion
1	2	3	4	7	8	9

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

PLEASE NOTE: The screen on the dash can not be in the “Vehicle Menu” mode when reprogramming the SWC. If the screen displays “Vehicle Menu”, press the Menu button on the SWC to leave this screen and ensure you are in the proper mode before proceeding.

1. Turn the key to the ignition position.
2. Press and release programming button on the side of the interface.
3. Within 7 seconds, press the button that is to be learned on the steering wheel. The LED will turn off 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.

1. If you need to program more buttons, repeat step 3 for each additional audio function on the steering wheel.
2. 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.
3. Once programming is completed, wait seven seconds. The LED will flash three times indicating end of programming.
4. 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

Radio	Alpine JV¢ Kenwood Clar		on 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	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		Phone Menu	Reject Call/Source (Bluetooth equipped radios only)
11	Band/Program	Phone Receive	Voice Dial			Answer Call	Answer/End Call
12	Receive	Phone Reject	On Hook			End Call
13	End	Voice Dial	Off Hook			Voice Activation
14		Power	Mute (Multimedia units only)
*Other = Advent, Boyo, Dual, Lightning Audio, Rockford Fosgate, & Visteon

SWC Re-calibration

This section only applies to the Answer, Hang Up and Voice buttons. All of the other buttons are data driven and will never require recalibration.

SWC re-calibration is necessary when the SWC operation is erratic or non-existent. This process re-calibrates the SWC values to the RP4 interface so it will know what they can be set to for button function assignment. The interface must be programmed in the specific order shown in the chart below. If you come across a function in the chart that your steering wheel does not have you must press and release the program 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.

The SWC and radio command assignments can always 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 all default values will be restored.

1. Turn the key to the ignition position.
2. Press and hold the programming button for 7 seconds until the LED begins blinking. When the LED begins blinking, release the programming button.
3. Within 7 seconds, press and release the button that is to be learned on the steering wheel. The LED will turn off when the button is pressed and come back on when it is released.
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 flash 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

Answer

Hang Up

Voice

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 3. If you wish to re-assign button functions you must also go through the programming process on page 4.

Product Updates (Firmware)

The RP4-HD11 can be updated with new firmware as it becomes available using the PAC-UP interface updater (sold separately). Please visit www.pac-audio.com/firmware for available updates.

Follow the procedure listed below to update the RP4-HD11:

1. Unplug all connectors from the RP4 interface
2. Set the rotary switch to position 0
3. Connect the PAC-UP
4. Update the interface
5. Disconnect the PAC-UP
6. Set the rotary switch back to normal operating position
7. Re-connect the RP4 to the vehicle