PAC RP4-HD11 - User Manual

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Radio Replacement and Steering Wheel Control

Interface for Select Honda Vehicles

RP4-HD11

PAC-audio.com

Pacific Accessory Corporation

Page 1

Rev: 3

Date: 050818

Introduction and Features

Important Notes

Wiring Connection Chart

Illustration / Schematic

1. These instructions apply to R.1.5.1.4 or later revisions. The revision info can be found on a small white sticker on the interface and

packaging.

2. 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).

3. 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 ash 4 times.

4. Vehicles equipped with factory navigation must follow the installation tech brief listed at www.pac-audio.com under the RP4-HD11 product

page.

5. 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 batttery 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.

6. The LED will ash whenever a SWC button is pressed.

SWC Connection

See above chart for

different radio type

connections

Acc On/

Programming

LED

Programming

Button

Wiring

SWC Connection

Interface Connector

Vehicle Connector

SWC Connector

Red / White Parking Brake

Output (-)

Purple / White Vehicle Speed

Output

Red Accessory Output

(10 amp)

Orange / White Illumination Output

(+)

Green Reverse Output (+)

White/Green SWC Analog Input

Yellow Battery +12v

Black Ground

Orange Dimmer

Orange/White Illumination

White Front L + input

White / Black Front L - input

Gray Front R + input

Gray / Black Front R - input

Green Rear L + input

Green / Black Rear L - input

Purple Rear R + input

Purple / Black Rear R - input

Blu/Yel Kenwwod, Newer

JVC

3.5mm Jack Alpine, JVC,

Clarion, Fusion,

Pioneer, Sony,

Boyo, Dual,

Lightning Audio,

Visteon or Advent

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 amplier, 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.

Aftermarket Radio Connections

See above chart for wire color

description.

Cut for Non-Amplied systems

Vehicle Connections

Need help?

Do you have a question about the PAC RP4-HD11 and is the answer not in the manual?

Summary

Introduction and Features

Product Overview

Explains the RP4-HD11's function, retaining factory features like SWC, amplifier, and clock.

Important Installation Notes

Provides critical installation and usage guidelines, including revision info, switch settings, and vehicle specifics.

Wiring Connection Guide

Details interface, vehicle, and SWC connector pinouts and color codes for wiring.

Wiring Schematic

Visual representation of the interface wiring connections for aftermarket radios and vehicle.

SWC Connection Diagram

Diagram illustrating the SWC connector and its connection to the interface.

Installation and Programming Steps

Radio Select Switch Setting

Guide to setting the rotary switch on the interface for proper radio compatibility.

Default SWC Functionality

Details pre-programmed SWC functions and how to restore default settings.

Default SWC Button Assignments

Table showing default button assignments for various radio brands like Alpine, JVC, Sony.

Customizing Steering Wheel Controls

Setting Radio Select Switch for Programming

Guide to setting the rotary switch on the interface for proper radio compatibility during programming.

Optional Programming Order

Step-by-step guide for custom programming SWC functions for different car/radio brands.

Advanced SWC Operations and Updates

SWC Re-calibration Process

Process to recalibrate SWC values when operation is erratic or non-existent.

Firmware Product Updates

Instructions for updating the RP4-HD11 firmware using the PAC-UP interface updater.

Summary

Introduction and Features

Product Overview

Explains the RP4-HD11's function, retaining factory features like SWC, amplifier, and clock.

Important Installation Notes

Provides critical installation and usage guidelines, including revision info, switch settings, and vehicle specifics.

Wiring Connection Guide

Details interface, vehicle, and SWC connector pinouts and color codes for wiring.

Wiring Schematic

Visual representation of the interface wiring connections for aftermarket radios and vehicle.

SWC Connection Diagram

Diagram illustrating the SWC connector and its connection to the interface.

Installation and Programming Steps

Radio Select Switch Setting

Guide to setting the rotary switch on the interface for proper radio compatibility.

Default SWC Functionality

Details pre-programmed SWC functions and how to restore default settings.

Default SWC Button Assignments

Table showing default button assignments for various radio brands like Alpine, JVC, Sony.

Customizing Steering Wheel Controls

Setting Radio Select Switch for Programming

Guide to setting the rotary switch on the interface for proper radio compatibility during programming.

Optional Programming Order

Step-by-step guide for custom programming SWC functions for different car/radio brands.

Advanced SWC Operations and Updates

SWC Re-calibration Process

Process to recalibrate SWC values when operation is erratic or non-existent.

Firmware Product Updates

Instructions for updating the RP4-HD11 firmware using the PAC-UP interface updater.

The RP4-HD11 is a sophisticated interface designed to facilitate the replacement of a factory radio in select Honda vehicles equipped with MSCAN databus radios. Its primary function is to ensure the seamless integration of an aftermarket radio while retaining crucial factory features and enhancing the user experience with advanced control options.

Function Description

The core capability of the RP4-HD11 lies in its ability to maintain factory functionalities that would otherwise be lost when the original radio is removed. This includes the retention of steering wheel controls (SWC), allowing the driver to continue managing audio functions without taking their hands off the wheel. Furthermore, the interface preserves the functionality of the factory amplifier, ensuring that the vehicle's existing audio system continues to operate optimally with the new radio. A significant feature is its capacity to allow for the setting of the factory clock, a function often tied to the original head unit.

Beyond retention, the RP4-HD11 introduces enhanced control possibilities. It supports dual command functionality for SWC buttons, meaning each button can be programmed to perform two distinct radio functions: one with a short press and another with a long press. This significantly expands the utility of the existing steering wheel controls. The interface also provides essential data bus driven outputs, which are critical for aftermarket radio installations. These outputs include accessory power, a vehicle speed sensor (VSS) signal, illumination, a reverse trigger, and a parking brake signal. These signals are vital for the proper operation and safety features of many aftermarket head units, such as navigation systems that require VSS for accurate positioning or video players that need a parking brake signal for safety interlocks.

Usage Features

The RP4-HD11 is designed for user-friendly setup and customization. Before installation, the radio select rotary switch on the side of the interface must be set to the correct radio type, ensuring compatibility with the aftermarket head unit. The interface comes pre-programmed with default SWC functions for all supported vehicles, meaning that for most users, no additional programming is required. However, for those who wish to customize their controls or utilize the dual command functionality, the device offers an intuitive programming mode.

Programming SWC functions involves a simple sequence of pressing the program button on the interface and then the desired button on the steering wheel. The LED indicator on the interface provides visual feedback during this process, confirming successful button presses and programming steps. If a steering wheel button is not present or a function is not desired, the user can easily skip that function during programming by pressing and releasing the program button. The interface also includes a mechanism to restore default SWC settings by simply pressing and releasing the program button once and waiting for a specific LED flash sequence.

For vehicles equipped with factory navigation or a 7" touchscreen, specific installation notes are provided to address unique challenges, such as the loss of clock and date setting capabilities from the factory display. The manual offers workarounds for these situations, including battery disconnection procedures to reset the display. The LED on the interface also serves as a diagnostic tool, flashing whenever an SWC button is pressed, confirming that the interface is receiving commands.

Maintenance Features

The RP4-HD11 is designed with future-proofing in mind, offering firmware update capabilities. This ensures that the interface can be updated with new features, bug fixes, or compatibility improvements as they become available. Users can update the device using a PAC-UP interface updater (sold separately) by following a straightforward procedure that involves disconnecting the interface, setting the rotary switch to a specific position, connecting the updater, and then reconnecting to the vehicle. This allows the device to remain current with evolving vehicle technologies and aftermarket radio models.

In cases where SWC operation becomes erratic or non-existent, the interface supports a re-calibration process. This re-calibration is specifically for the Answer, Hang Up, and Voice buttons, as other buttons are data-driven and do not require re-calibration. The re-calibration process involves holding the programming button until the LED blinks, then pressing the SWC buttons in a specific order. This ensures that the interface accurately learns the SWC values, allowing for proper button function assignment. If no buttons are pressed during re-calibration, the default SWC values are restored. This maintenance feature helps resolve common issues and ensures reliable performance of the steering wheel controls over time.

PAC RP4-HD11 Specifications

General

Device Type	Radio Replacement Interface
Steering Wheel Control Retention	Yes
Installation	Plug-and-Play
Amplifier Turn-On	Yes
Output Channels	4
Power Supply	12V DC
Compatibility (OS)	Not applicable
Compatibility	Select Honda/Acura Vehicles
Outputs	RCA
Connectivity	RCA