[feldsam]

Hello guys, I am owner of USDM Accord 2018 EX-L 1.5T. I am live in Europe, car was imported by previous owner when he moves from San Francisco to Prague, Czechia.

Here in Europe, we use Celsious to define temperatures, so it is little bit unconfortable to have it in Fahrenheit. I also see some post from USA guy, who got Cannadian version of Accord and he is in opposite situation.

I did research and find out, how to change units in our Accords. It is about hardware replacement.

Behind the glove box is climate blower unit. There is computer assy unit mounted on the right.

USDM part number - 79600-TVA-A41 - programmed to work with Fahrenheit
Cannadian part number - 79600-TVA-C41 - programmed to work with Celsius

This is only hardware you need to exchange.

Celsius are show with decimals and step is half degree. It will be show correctly on infotaiment system, but not on the climate control panel, where are no decimal numbers on USDM version hardware.

If you want decimals on control panel, you need to exchange also this part

79610-TVA-A51ZA - USDM Touring trim
79610-TVA-A31ZA - USDM EX-L
79610-TVA-C51ZA - CAD Touring trim
79610-TVA-C31ZA - CAD EX-L

You can find correct panel for your trim in hondapartsnow.com catalog and them just replace A to C to get cannadian version.

All parts are available on requst via Honda dealer network.

Replacing parts is expensive way, but there is another option. We can flash firmware in computer assy unit using UPA programmer. There is 93C86 chip, which can be flashed.

I am waiting for my programmer to arrive, I update this post in two weeks. I am also playing with idea, that climate control pannel display is same on both USDM and CAD version and there is only different firmware. I will see when I read eeprom from both panels. (I was lucky, I got cannadian pannel from eBay for just ~$50.)

UPDATE:
Regarding clima control panel, there are different displays, so only way to get decimals is to buy canadian version of panel. On the other hand, decimals are show on infotaiment screen, so it is not so important and this panel is so expensive, about $300.

 

[Rawrer]

Very cool, looking forward to hearing what you find!

 

[feldsam]

Hi @Rawrer, I suppose you want to change from C to F, right? In your case easier way is to order 79600-TVA-A41 for ~$60.

 

[feldsam]

Hello everybody, I have update regarding this. In meantime I got my programmer UPA-USB S and on eBay I got from UK company in-circuit dongle and lead set for UPA. I read EEPROM 93C86 using supplied program. I have to select x16 version, which means it is 16bit. Read was successfull, but I am not able to figure out, which bites in firmware I have to change.

I navigate to drive2.ru website, where I found two guys claiming, that they know how to do it.
Some guy from Minsk, Belarus
and second one from Moskow

unfortunattely, these guys are not very shareable and ask $130 to $200 for binnary file update. I decided to order original honda unit from Canada, part no. 79600-TVA-C41 (got C43) via torontohondaparts.com. I received it this week and I read eeprom immediatelly. I flashed it to USA version unit 79600-TVA-A41 and it works too.

I share canadian and also american firmware here next week

In case, you are not able to flash it yourself, I can offer you flash service. I have one unit spare, so I am able to send unit to you. When you installed it, you pack and send me back your old unit. I flash it and can use for another customer.

If anybody interested, PM me.

Some photos:

and here is result:

 

[feldsam]

Sharing EEPROM bins for both US and CA units 4 KB folder on MEGA

 

[Snitker]

Sharing EEPROM bins for both US and CA units 4 KB folder on MEGA

Hi there,
I can see the files but how can I actually flash the unit?

 

[feldsam]

Hello @Snitker , as I wrote in my previous post

How to change fahrenheit to celsius and vice-versa on...

Hello guys, I am owner of USDM Accord 2018 EX-L 1.5T. I am live in Europe, car was imported by previous owner when he moves from San Francisco to Prague, Czechia. Here in Europe, we use Celsious to define temperatures, so it is little bit unconfortable to have it in Fahrenheit. I also see some...

www.accordxclub.com

I bought UPA programer and dongle set. There are also links to where to buy and how much it costs. I think, I can flash unit for you. I have one spare unit, so I can send you mine, and you send me back yours when you replace it.

 

[Snitker]

Hello @Snitker , as I wrote in my previous post

How to change fahrenheit to celsius and vice-versa on...

Hello guys, I am owner of USDM Accord 2018 EX-L 1.5T. I am live in Europe, car was imported by previous owner when he moves from San Francisco to Prague, Czechia. Here in Europe, we use Celsious to define temperatures, so it is little bit unconfortable to have it in Fahrenheit. I also see some...

www.accordxclub.com

I bought UPA programer and dongle set. There are also links to where to buy and how much it costs. I think, I can flash unit for you. I have one spare unit, so I can send you mine, and you send me back yours when you replace it.

I have DM you

 

[Serart_dp]

Hello @Snitker , as I wrote in my previous post

How to change fahrenheit to celsius and vice-versa on...

Hello guys, I am owner of USDM Accord 2018 EX-L 1.5T. I am live in Europe, car was imported by previous owner when he moves from San Francisco to Prague, Czechia. Here in Europe, we use Celsious to define temperatures, so it is little bit unconfortable to have it in Fahrenheit. I also see some...

www.accordxclub.com

I bought UPA programer and dongle set. There are also links to where to buy and how much it costs. I think, I can flash unit for you. I have one spare unit, so I can send you mine, and you send me back yours when you replace it.

Hi can you tell about pinout ? Is this correct connection?
And Vcc= 5V ? you do it onboard or you remove eeprom?

 

[feldsam]

Hello @Serart_dp, as I wrote in my fourth post, I used in-circuit dongle, so I don't need hasle with pinout. Voltage is 5V, provided by UPA programmer.

 

[Zlat]

@feldsam that's impressive effort from your side. Respect!

Have you made some research if the built in FM radio can be manipulated to decrease the seek step from 20MHz to 10MHz?

 

[feldsam]

Hello, thank you!

regarding FM tunner, you are not first asking for this. Owner from Poland have same problem. I am probably more lucky, because here in Czech and Slovak are lot of stations on even frequencies, so I don't have problem.

To change FM tuner regulatory domain, we need to hack head unit (HU) = root android system in it. Unfortunatelly, this new units (also in Civic XI) are better protected that older one (for ex. in Civic X). So there is still no root for our HU. Some progress was done, but only about enabling browser app for watching youtube videos.

You should follow this forum, I hope, there will be progress in future.

Honda Accord 2018 Sport and installing Apps

HI all, So far I've been reading the threads here for the Civic and the Pilot for hacking the Honda head unit for installing Waze and Google Play Music, but nothing seems to work with the 2018 Accord, I may be missing something.. I don's seem to...

forum.xda-developers.com

 

[Zlat]

here in Czech and Slovak are lot of stations on even frequencies, so I don't have problem

In Sofia(Bulgaria) we do too. My FM memory slots are full and there's even couple left in surplus, but wanted to pick from wider choice if possible.There's also enough online radio apps for AA, so not that big deal. Thanks for the link anyway!

Just for the record, I know that there's some BMW guru in the city and he successfully is "curing" the BMWs to seek also through odd frequencies.

 

[Lukasz4d]

Hi,
It's working.

Accord X - change F to C on climate control

Accord US. Conversion fahrenheit to celsius

youtube.com

I didn't change climate panel. I used orginal.
@feldsam great work. Thanks a lot dude