Tutorial of how to modify OBD connector?

[alvarodevlabs]

Hello, i tried to connect with OBD WiFi and another via bluetooh and all ok, can connect to my car (Megane 3 RS) but i want to activate android auto and see Navigation and Audios ECUS and see another ecus but always when i click on scan appears the same 11 ECUS and not audio or navigation, i read in all sites that i have to modify my obd connector pins 12 and 14 but i dont know how or what i need to do that, can some home give some instructions of how to do it? (For noobs) haha.

Where can i find the cable and how to change the pins from my obd?

Thanks!!

[cedricp]

https://github.com/cedricp/ddt4all/wiki#how-to-access-multimedia-can-bus

[MellotronScratch]

Hi have modified a Ford OBD adapter with a PIC18F25K80 chip. These adapters have a toggle switch to switch between different CAN networks of Ford. I changed the connections from pin 3 to pin 13 and pin 11 to pin 12. This way you can switch between the multimedia CAN bus and normal CAN bus. The only thing you will need is a soldering iron and a screwdriver.

https://www.aliexpress.com/item/100-PIC18F25K80-Chip-ELM327-V1-5-USB-Switch-ELM-327-For-Ford-HS-CAN-MS-CAN/32829576979.html

[ohayyam]

Hello to all.

Sorry for the delay but, between the work and the fever I have not had time to try to "explain" my developments. First I would like to warn you that, to complete the work, you need a little bit of familiarity with the use of soldering iron (preferably professional) and, in any case, as I said from the beginning, it's all at your responsibility. First step to where I started: make a PHOTO of the OBD socket of the car, as you can see (the pictures are all in the final link), has only 8 connected PIN. Here so I tried to find out what he was referring to the pin ( http://pinoutdiagram.com/renault-obd-ii-diagnostic-connector-pinout/) And I have tried to reproduce the same configuration interface ELM used for the various "procedures" well known. In this case, therefore, having to interact with the multimedia CAN bus, it is necessary to make a change of the cables which intercept the "high level" interface signal (6 and 14) and interposing a diverter that, using the same PIN, divert them toward those of "low level" (13:12) Renault (the diagram and photos of the links are always in the link below). Then, sore, it is necessary to remove the resistance (R04 from 120Ohm) which is located in the contact bridge (6 and 4) on the base of the ELM. Finally, once all closed, one may proceed by connecting the ELM to the machine, and then open the "mythical" DDT4ALL and enable (low level) in ' ECU A-IVI (In-Vehicle Infotainment Android) DAB parameter. Subsequently, returning to the ECU RadNav (high level), simply turn the DAB parameters that I had sent earlier to Loris. As always, at the end of it all it makes a nice reset the device and .... Bingo!

Read more at https://www.renaultclub.it/index.php?threads/radio-dab-su-scenic-iv-risolto.3172/page-5#06UxHvbSzy3GRtWh.99

he was mentioned to remove a resistance at forum. Any idea ?

[alvarodevlabs]

Ok great but where can u find the cables? Because i think there are data cable right? Where can i but It?

[ohayyam]

https://www.drive2.ru/l/468057702971474426/

But above link did not mention about removing resistance.

[cedricp]

Indeed, a 120 Ohm resistor shouldn't be integrated, as the vehicle bus has already a termination on each ends. Thank you for the feedback.

[alvarodevlabs]

Ok so... i recently get this Can i establish the cable betweet my obd elm to the new adapter using this on the obd elm: And then connect it to my car?

Of course changing pins from my obd elm to new adapter like this: ELM 6--> OBD 13 ELM 14--> OBD12 ELM 4--> OBD4 ELM 5--> OBD5 ELM 16--> OBD16

Right?

[ohayyam]

No need to second connection socket. just follow the link for procedure.

https://www.drive2.ru/l/468057702971474426/

[Banana009]

I modified according to the instructions above, remove the resistance of ELM adapters (USB, wifi adapters). Adapters communicate with RadNav without problems but not with A-VI v0.9.
am not able to to read/write to A-VI v0.9 .When I switched to LS CAN, scaned it , DDT4ALL found only Central Panel 7/8.7 :-) Nothing else :-1: I have Grand Scenic IV Can someone help me?

[ohayyam]

I am not sure but next step is try to find original ELM327 chip which is 21 USD. Chines clone can work limited. Just check obdlink sx ( Red one when we open the program it is proper for ddt4all. )

If it will not work means we have to wait for updated database...

Thanks & Regards,

[Banana009]

Is interesting that someone from the Italian forum is working with the Chinese clone without any problem :-( On the other hand, I am at least able to read Central Panel 7/8.7 . This proves that communication works.

[lucamagilla]

On the Italian site only one seems to have succeeded

[testeur70]

Hi have modified a Ford OBD adapter with a PIC18F25K80 chip. These adapters have a toggle switch to switch between different CAN networks of Ford. I changed the connections from pin 3 to pin 13 and pin 11 to pin 12. This way you can switch between the multimedia CAN bus and normal CAN bus. The only thing you will need is a soldering iron and a screwdriver.

https://www.aliexpress.com/item/100-PIC18F25K80-Chip-ELM327-V1-5-USB-Switch-ELM-327-For-Ford-HS-CAN-MS-CAN/32829576979.html

Hello Felix, I have the same elm and want to use it with ddt on my scenic. Can you confirm that you just have to switch pin 3 to pin 13 and pin 11 to pin 12, to have a fully working ELM with high and low CAN ? Thanks

[MellotronScratch]

Hi have modified a Ford OBD adapter with a PIC18F25K80 chip. These adapters have a toggle switch to switch between different CAN networks of Ford. I changed the connections from pin 3 to pin 13 and pin 11 to pin 12. This way you can switch between the multimedia CAN bus and normal CAN bus. The only thing you will need is a soldering iron and a screwdriver. https://www.aliexpress.com/item/100-PIC18F25K80-Chip-ELM327-V1-5-USB-Switch-ELM-327-For-Ford-HS-CAN-MS-CAN/32829576979.html

Hello Felix, I have the same elm and want to use it with ddt on my scenic. Can you confirm that you just have to switch pin 3 to pin 13 and pin 11 to pin 12, to have a fully working ELM with high and low CAN ? Thanks

Hi,

Yes that's all. :)

[mnigten]

I have this one from August last year and modified as discribed. It works great.

[TimvdEijnden]

Yes this also worked great for me!

[myshuker]

hey friend can I use this ? https://www.aliexpress.com/item/4000955430101.html?spm=a2g0o.detail.0.0.6ae92d1cdsLP9L&gps-id=pcDetailCartBuyAlsoBuy&scm=1007.12908.197732.0&scm_id=1007.12908.197732.0&scm-url=1007.12908.197732.0&pvid=2560a7d1-bf0a-4eac-818e-ee46eb6946be&_t=gps-id:pcDetailCartBuyAlsoBuy,scm-url:1007.12908.197732.0,pvid:2560a7d1-bf0a-4eac-818e-ee46eb6946be,tpp_buckets:668%230%23131923%238_668%23888%233325%233_668%232846%238110%231995_668%232717%237561%23306__668%235154%2323664%23130

[MellotronScratch]

Looks good to me :)

[myshuker]

Looks good to me :) so it can be used for renault and dacia cars?

[myshuker]

Looks good to me :)

and witch chosse for renault cars is HS CAN or MS CAN?

[MellotronScratch]

Looks good to me :) so it can be used for renault and dacia cars?

I think so, but only after you change the wires for the media can bus. But I assume you are aware of that ;)

[myshuker]

Looks good to me :) so it can be used for renault and dacia cars?

I think so, but only after you change the wires for the media can bus. But I assume you are aware of that ;)

thanks friend , but i assume they was already change the wires in this modul, because the y put a switch , is that correct?

[MellotronScratch]

thanks friend , but i assume they was already change the wires in this modul, because the y put a switch , is that correct?

You are right, but Ford uses another pin assignment for the media can bus. Change the wires connected to the pins as follows:

Media CAN L - Ford pin 3 change to pin 13 Media CAN H - Ford pin 11 change to pin 12

[myshuker]

ok ... BIG THANKS my friend

[luissilva1971]

What about pic18F25K80 ... is it required or not for DDT4all and Renault/Dacia Cars? the one the link is showing does not have it... it apears! Em quinta-feira, 28 de janeiro de 2021, 11:40:24 WET, Mohammad alshoker[email protected] escreveu:

ok ... BIG THANKS my friend

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[MellotronScratch]

What about pic18F25K80 ... is it required or not for DDT4all and Renault/Dacia Cars? the one the link is showing does not have it... it apears!

It says it does. But you can always ask the seller to be more sure.

[myshuker]

• pin 6 on ELM side to pin 13 on OBD side
• pin 14 on ELM side to pin 12 on OBD side

[VVitchfinder]

I have an obdlink sx (red) do I have to mod this to get it to connect to my Renault? I have a new media nav with the system config message and I want to fix it in ddt4all. I was told it was just plug and play but it doesn’t seem to work.

[AndyIreland]

https://andyrobus.wordpress.com/2021/07/18/wiring-up-an-obd2-splitter-cable-to-read-a-renault-r-link-radio/

[charliehoward]

Can someone clarify, I connected the pins 6 to 13, and 14 to 12 in my adapter but it didn't work. What am I doing wrong?