FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)

[kill-bill]

Hello. I have same problem. Can connect to engine, but can't connect to CAN modules. My ELM 327 interface has a chip CH340G. I will post some pictures of the board and if some one can help me i would be grateful.
Thanks in advance.
https://drive.google.com/file/d/1eueCKERsFD3Nwf_MFGVhjLafevboO6Sn/view?usp=sharing

[LOB]

Hi all,
Anyone can point me what I have to change to make this interface work properly with multiecuscan?





Thanks in advance

[Mejinn]

hello, I have this elm I don't have the resistor.
I still can't connect with the can network,
the pins of the can network counting from the left are exactly the number 6-7 the cleanest ones with the pond.
they start directly from the integrated vc1040, (clone of TJA1040) thank you in advance for your help.

[Mejinn]

Pics of my elm327
https://i.postimg.cc/G2vTQJFH/IMG-20210203-083145.jpg
https://i.postimg.cc/sXCvvQky/IMG-20210203-083200-1.jpg
https://i.postimg.cc/1t046RSF/IMG-20210203-083205-1.jpg
https://i.postimg.cc/GtmqgwY5/IMG-20210202-172253.jpg
https://i.postimg.cc/j23vGg4d/IMG-20210202-172301.jpg

[Y Cymro]

I’ve posted this to add to the library of images in this thread highlighting the large number of different elm327 circuit board designs.

To get my elm327 Wi-fi interface to work with a yellow adapter cable I removed the 120ohm resistor R4 shown below bridging pins 6 and 7 on the adjacent MCP2551 chip. The Wi-fi board plugs into this one using the 4 pin plug at the top of the photo

[shamano1982]

hello i bought this adapter , in com test says all protocol available but i cant connect to the car , fiat punto evo 2010

[P.Björk]

Hi all
Here are pictures of my 2 ELM327 wifi/BLU
Are they okay or not? Can’t get connection to any ecu in my Ducato 2012

[P.Björk]

Why can’t I attach pictures??

[LordMayros]

Hello friends, I can only connect to the engine with the device below.
I removed the resistor in the picture, it did not work again, what should I do

https://hizliresim.com/VALGDZ

[Palgor]

Hello folks,
After reading through some of the posts, I decided to join in with my bit, hoping this is helpful to someone.

On my board it was R2 and you can see the position in the photos. I removed the resistor, it was also marked 121 on top.

Fixed everything and I was able to use multiecuscan with no issues and do proxy alignment. The first post on this thread has a very helpful diagram which helped me identify the chip that has 8 connections, of which connections 6 and 7 lead to the resistor I needed to remove and then onwards to connector 6 and 14 in the OBD plug.

I hope this helps and thank you all for your advice and experience.