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Discussion Starter #1
I am doing this to start discussion about swapping or adding HD Radio, Navigation, and sub woofer options using OEM head unit to the car that doesn't have it. I have 2017 EX without Navi.

EX/EX-L without Navigation, 180 Watts 6 speakers (7" touchscreen) - UH7CVM0-X (Screen: 39101-TLA-A11 39710-TLA-A01)

View attachment 128655 Screen3.jpg

EX-L with Navigation, HD Radio, 180 Watts 6 speakers (7" touchscreen) UH8CVM1-X (Screen: 39710-TLA-A21 39101-TLA-A31)

View attachment 128659 7Inc2.jpg

Touring with Navigation, HD Radio, 330 Watts 9 speakers (including Sub Woofer) UH8CVA0-X (Screen:39101-TLA-A82-M1)

Touring1.jpg

I don't have picture of the back of Touring screen. Plugs on EX vs EX-L with Navigation looks all the same from head unit side. From the car side, possibly the harness doesn't carry GPS antenna. On the Touring, it has extra plug. My guess that is the external amplifier output for the subwoofer.

When I turn on on the left Side I have buttons for:
EX without Navi: Home, Audio, Phone, Back, Weather
EX-L with Navi : Home, Map, Audio, Phone, Back, Weather
Touring : Home, Map, Audio, Phone, Back, Weather


From this, I would think swapping the EX-L Navi head unit to EX/EX-L without Navi
OPTION A:
- Screen must come from EX-L with Navi
- Need GPS Antenna
- Also gain HD Radio

OPTION B:
Swapping Touring Head Unit to EX without Navi,
- Screen must come from Touring
- Need GPS Antenna
- Gain HD Radio
- Gain Pre amp Sub Woofer output

OPTION C:
Swapping Touring Head Unit to EX-L with Navi
- Navigation will work right away
- Gain pre amp Sub Woofer output.

What do you guys think? it looks like option B is very tempting, I can live without built in Navi. But got the HD and Sub out.
 

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What do you guys think? it looks like option B is very tempting, I can live without built in Navi. But got the HD and Sub out.
I believe the touring head unit uses serial to communicate to the amp (under center console), and all audio goes through this route including doors and sub. You should get on Honda tech info and get the wiring diagrams.

Also, you can install the hd radio unit on a non touring head unit, see the touring upgrade thread.

Finally, if you buy the right rear quarter panel trim and the sub box, I bet you can install an aftermarket sub in the stock location. You just need a dsp and amp (and at that point, you might as well upgrade all 4 doors).

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i thought the only way to get HD Radio was to replace the tuner in the back side panel of vehicle...
 

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Discussion Starter #4
You are correct, the tuner is the one we need to replace not the screen. In my original post the attachment pictures went missing.

EX (UH7CVM0-X No NAvi, no HD Radio, no Pre Amp)
Ex3.jpg

EX-L Navi + HD Radio
EXNavi5.jpg

Touring Navi+HD+Pre amp
Touring1.jpg
 

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I've just begun searching for the possibility of adding HD radio to our 2018 EX. Are you saying that is possible to switch the tuner with part #39800-TLA-A11, which I found in another thread? I would be thrilled to learn this us the case!


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i think (not positive) the new tuner is under $200 US

my EXL did not come w/HD radio, btw.
 

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Thanks for the quick reply. I just found confirmation at another thread and with good instructions! I can't post links yet but it is started by Dan Miller


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For others who might be interested. Searching this number leads to another post with a real link.

178857


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Discussion Starter #9
After reading some schematic diagram, I think getting head unit with Sub out is not easy solution. The Amplifier itself also received ANC signal when producing audio signal to the subwoofer, either it is clearing the ANC ambient noice or adding ANC ambient noise. My guess it is clearing it. Here are what I found from Honda tech:


Stereo Amplifier
The stereo amplifier is a separated power amplifier interface. Digital audio signal (SPDIF2) that is received from the audio unit is
processed on the DSP, and sent to each speaker after amplified by the AMP IC.
The stereo amplifier communicates with the audio-navigation unit or the audio unit using the dedicated serial bus (RS485). This
communication includes the vehicle speed (for SVC) information, audio settings, and the MUTE commands. The stereo amplifier
adjusts the speaker outputs by oneself which is based on the received information.
The stereo amplifier receives the noise cancelling signal (ANC), guidance signal, and system beep signal via independent lines, and
mixes them to the applicable audio lines.
Amplifier.jpg

Active Noise Cancellation (ANC)/Active Sound Control
Both the active noise cancellation (ANC) and the active sound control are built into the ANC/active sound control unit. Both systems
eliminate unwanted sound entering the passenger compartment. There are two microphones mounted in the headliner; one is just
behind the front overhead roof console and the other is just ahead of the rear map lights. The microphones capture low frequencies
entering the passenger compartment and send a signal to the ANC/active sound control unit. The ANC/active sound control unit then
creates the sound wave that is sent out through the speakers to eliminate the unwanted sound.

Active Noise Cancellation (ANC)
The ANC system works to cancel the engine booming sound up to about 2,000 rpm (min-1). The ANC/active sound control unit
receives the engine speed pulse (NEP) from the PCM and outputs a sine-wave-sound through the audio speakers to cancel the lowfrequency
noise from the engine. The ANC system also uses two microphones to detect and monitor the low frequency noise in the
passenger compartment. The microphones feedback the noise information to the audio unit or the audio-navigation unit which adjusts
the speaker output to reduce the noise. The ANC also receives the output of the door open/close signal from the MICU. Whenever
any door is opened, the ANC system temporarily stops working. Each signal is sent to the ANC/active sound control unit via F-CAN.
The ANC/Active sound control unit monitors the stereo amplifier output signals to the subwoofer, and if the subwoofer gives a sound
more than the rated value, the ANC/Active sound control unit stops ANC control. This control is not for deleting bass of an audio
output.

-----------------------------------------------------------------
About the HD Radio, I think it is still possible to swap the tuner unit

Tuner Unit
The tuner unit is a separate digital radio tuner interface. Received AM/FM radio waves are processed on the digital signal processor
(DSP) and sent to the audio unit via the dedicated digital audio line (SPDIF1). At this time, HD radio(TM) sound signal is separated
from normal AM radio sound signal. All of the information about AM/FM reception (includes RBDS information) are sent from the tuner
unit via the dedicated serial bus (RS485). This unit holds AM/FM radio frequency presets even when the 12 volt battery is
disconnected.
For vehicles with Sirius XM® radio, the antenna for receiving AM/FM radio waves and satellite/terrestrial (XM) signal uses a roof
antenna type. AM/FM radio wave is amplified by the AM/FM antenna amplifier. The sensitivity of the FM wave is raised by the auto
gain control. The XM antenna receives satellite signal and terrestrial signal by using the high-gain antenna. Signals are sent to the
audio unit via the dedicated single line (SAT/TER).
Self-Diagnostic

FrontStereoLocation.jpg

FrontStereoLocation.jpg

ANC.jpg
 
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