ELM327-USB V3.0

[nickromano]

kris which resistor have you removed?

[Gyrxiur]

Hello, I've bought new elm327 and I have same pcb, except one missing resistor, different type of obd cable connector and I have connector for usb cable inside. Maybe the missing resistor on my pcb is the same, which kris removed. So here is the picture with missing resistor:

missing resistor on my version

SDC13985.JPG (147.71 KiB) Viewed 11690 times

[nickromano]

thanks for helping, i removed it but nothing changed. can line not working, k-line working fine

[peppino]

@nickromano maybe you don't remove the correct resistor. This resistor should be 120 Ohm, 121 written on smd resistor. This resistor is between the CAN-L and CAN-H is simple to understand it. Pin 6 and 14 of OBD connector.

[maxiq4]

hello
I have to same elm module (page 1 look the pictures)
and I have same problem
it does not work when connect it usb!

usb driver is ok
but software not detect elm327

when type hyper therminal ATZ
not responding !

this pcb is different yours
NO ANY R04 or no resistor between canl-canh 100 ohm

there is "not usb problem"
Im try all usb port and drivers
also I have another bluetooth elm327 (blue sticker)
its working very good my notebook

Im searching solution
have you any solution ?


edit1 for pictures:






edit2 for solution:

Im found some mistake
(Im read before some guy write in this forum someting else)

1-
in the can line two capacitor are mistake (10nf)
Im change it to 680p

2-
elm327 is must be connect obd port
or must be connect 12 volt
otherwise no 5volt come to microcontroller

now its work...
but I can not already ATZ or other any command in hyper terminal ??
interesting

here picture
you must check and change that capacitors, its must be wrong (C12 AND C14)

[ARomeo]

See and check

[orso yoghi]

can anyone confirm that after the change suggested by maxiq4 the interface works?

I have an identical interface and have trouble connecting to form one module access is the module can info.

[Kuki]

I have te same ELM 327 v 1.5, whit the same electronic.
It work fine on Windows XP, but I have problems on Windows 7 32bit or 64bit.

Any solution?

[alexg]

alway great is someone solves it and doenst give the whole story how he did it.
But thats at all the forums most of the time i learned...

I have the same problem with my v3.0 board.
Engine ecu connects ok all others i get the u need vagcom kable message.

I whas looking at my board and thinking.
What about R24 (2102 on it) on the backside to remove?

Would it help if i removed that one ?
Not a great star at electricboard reading..


Back of board



closeup



Front of board

[rustin]

Hello. I have the same elm327 v3.0. What do I have to do to connect with other modules than the ECU?