Name: iDatalink HRN-RR-SU2 Interface Harness
Brand: iDatalink
SKU: 794HRRSU2
Rating: 4.5 (52 reviews)

Overview

iDatalink HRN-RR-SU2

This HRN-RR-SU2 interface harness from iDatalink allows you to connect a new iDatalink-ready car stereo in select 2012-up Subaru vehicles, working in conjunction with iDatalink's Maestro ADS-MRR or ADS-MRR2 module. Once connected, you'll retain the use of your Subaru's steering wheel audio controls. You'll also keep your Subaru's amp and subwoofer (if present), plus you'll also be able to display engine performance data and other vehicle info on your receiver's screen.

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iDatalink HRN-RR-SU2

The package includes three connectors that plug in between the Maestro module, your Subaru radio's wiring plugs, and your new car stereo. You'll have to solder or splice together this harness's power/ground, illumination, and speaker output wires to the corresponding wires on your aftermarket receiver's wiring harness. The iDatalink harness also supplies the outputs you'll need for a navigation receiver.

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Product highlights:

allows installation of a new iDatalink-ready receiver in select Subaru vehicles
also requires the Maestro ADS-MRR or ADS-MRR2 module
retains the use of your steering wheel audio controls, plus factory amp and subwoofer
displays engine performance data on touchscreen
provides outputs for a navigation receiver
warranty: 1 year
MFR # HRN-RR-SU2

What's in the box:

iDatalink HRN-RR-SU2 Interface Harness owner's manual

Radio/vehicle harness
Backup camera harness
OBDII harness
"D" harness
"B" harness
"A" harness

Reviews (52)

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Details

Researched by Crutchfield's Stacey B.

Product Research

Features

Subaru Installation Harness: The iDatalink Maestro HRN-RR-SU2 installation harness greatly simplifies the installation of the Maestro RR or RR2 Car Radio Replacement Interface module (sold separately) in select Subaru, Scion, & Toyota vehicles when replacing your factory radio with an iDatalink Serial Port compatible head unit from Kenwood, JVC, Alpine, Sony, or Pioneer.

Vehicle Compatibility: Click here for a list of compatible Subaru, Scion, & Toyota vehicles.
Radio Compatibility: Click here for a list of fully compatible aftermarket head units with an iDatalink Serial Port.

Notes: The iDatalink Maestro HRN-RR-SU2 installation harness requires the purchase of the iDatalink Maestro RR or RR2 (sold separately). This installation harness will not work with aftermarket head units that do not feature an iDatalink Serial Port.

Flashing Module via Weblink Desktop: The iDatalink Maestro RR or RR2 will need to be loaded with correct firmware before installation. The included USB cable plugs into your computer and allows you to "flash" the Maestro RR or RR2 with the appropriate firmware to prepare it for installation. Simply download Weblink Desktop (for Windows and Mac) onto your computer to access the appropriate firmware. System requirements include -

Windows PC (10/8.1/8/7/Vista/XP/2000) or Mac OS X (Mojave [10.14], HighSierra [10.13], Sierra [10.12], El-Capitan [10.11])
Available USB port (version 2.0 or 3.0)
4GB RAM or more
200MB available space on HDD
Internet connection

Retained Factory Features: The following factory features (if applicable) are retained when replacing your factory radio with a compatible iDatalink Serial Port head unit from Kenwood, JVC, Alpine, Sony, or Pioneer using the Maestro RR or RR2 Car Radio Replacement Interface module and HRN-RR-SU2 installation harness.

Factory Starlink telematics and SOS buttons (if equipped)
Factory amplifier with turn-on & fader (if equipped)
Factory steering wheel controls (SWC) with two-function programmability
Factory Aux input and backup camera (if equipped)

Extra Features: The following Extra features are added when replacing your aftermarket head unit with a compatible iDatalink Serial Port head unit from Kenwood, JVC, Pioneer, Sony, or Alpine using the Maestro RR or RR2 Car Radio Replacement Interface module and HRN-RR-SU2 installation harness.

Selectable Performance Gauges
Read/Reset Check Engine Codes
Vehicle Info (including Tire Pressure Display, Battery Voltage Display, & Door Open Status/Warning)

Navigation Outputs: The HRN-RR-SU2 provides a VSS (vehicle speed sense), Parking Brake, and a Reverse Light output to make installing your compatible aftermarket navigation radio simpler and less time consuming.

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Q&A

3 questions already asked

After my own and a professional installer's attempts, I am still unable to identify where to connect the OEM Starlink wire on my 2019 Subaru WRX STI (Using a Kenwood DNX997XR, HRN-RR-SU2 Maestro harness, and iDatalink Maestro RR.) As a result the Starlink light on my headliner remains lit and I am receiving emails from Starlink about the error. My car came with the OEM HK (Harmon Kardon) 7" non-nav touchscreen. All the wiring diagrams I've tried point to tap a wire on an OEM 24 pin pink or white/blue wire, or an 8 PIN pink or white/blue wire. My OEM plugs however have MULTIPLE pink wires, and white/blue. The Maestro supplied wiring diagrams I'm using are for a "Subaru WRX STI with 7 inch screen and Harmon Kardon 2018" and the one labeled "Subaru WRX STI with 7 inch screen 2019-2020". Any help would be greatly appreciated identifying where to connect the Starlink Maestro wiring harness cable to the factory/OEM Starlink cable on my vehicle. Can someone please help?

glenn Jul 18, 2021

1 answer

If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the connections on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.

kenneth Jul 26, 2021 (Staff)

Hi, I upgraded to my radio to Kenwood DDX6906s. Now my steering wheel controls don't work. My question is, do I still need the iDatalink Maestro RR Interface Module plus this harness to restore my controls? I obviously don't know much of these things. Thanks!

izzca Jan 15, 2020

2 answers

Yes, you will need both the module and the harness. I have both in my 2016 Crosstrek and the steering wheel controls work properly with my Kenwood HU. You will also need to "program" the iDatalink module before installing. That is easy enough to do, just a matter of picking the right picture of your steering wheel button configuration during the programming process.

terence Jan 15, 2020

Yes the combination of this harness and the Maestro RR will allow continued use of you steering wheel controls, backup camera and it will provide your head unit with other information from your ODBII connection to be displayed on the screen.

donald Jan 15, 2020

do i need to use obd2 harness? i have a subaru and i want to retain the backup camera, radio, ect. i dont have steering wheel controls or vehicle data that needs to be observed. would this still work without the OBDII port connected? also does the reverse camera need a 12v to 6v step down? thanks

brett Mar 13, 2019

5 answers

Brett, No, you don't need it, but I would highly recommend it. It is pain free to install and provides an array of features. Install it! 12v/6v depends on head unit, I believe.

james Mar 14, 2019

Hi Brett. I recently upgraded the stereo in my 2018 Subaru WRX and this is everything that I purchased and needed for the job: Metra 40-LX11 Antenna Adapter, Scosche SU2031B Dash Kit Gloss Black, iDatalink Maestro ADS-MRR Interface Module, iDatalink HRN-RR-SU2 Interface Harness. With that I still have radio, backup camera, and steering wheel controls. Alex Z.

alexander Mar 14, 2019

Hey Brett I wish I could give you a better answer then this but I went aftermarket with everything. I always have the OBD port occupied to receive vehicle info with my Kenwood 9905s. I did not have the oem deck and camera. My camera I installed and all works good. I maintained all steering wheel controls. I had to customize mine for personal use which is a plus for information you want. In addition to a single press of the stearing wheel buttons you can do a long press for an additional function. All information is accurate tire oresssure, RPMS, temps, etc... that is about as much information I can give you. Oh and yes I needed the subaru newest version harness which I have a 2012 outback.

josh Mar 13, 2019

Everything in the pic is what u need. I didn't have to buy anything extra. Idk anything about 12v to 6v. Everything was straight forward

sylvester Mar 13, 2019

The OBDII port is just for tire pressure, check engine codes etc. For the backup camera and radio you shouldnt need it, if you flash the proper firmware on the datalink box it should be a snap

jeff Mar 13, 2019

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