FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)

[lolo85v]

alfa 159

[Alfaeddy]

Try it once and hit the OBD connector to the side
A friend was also unable to connect to the control unit of his Mito
. produce
After several attempts, the pressed the plug upwards and
He was able to connect.

For some reason he had a loose connection in the plug

Greetings Eddy

[Tom1337]

Hi!

I have an interface like this:



After removing resistor R4, interface connects to CAN, but the connection is very unreliable, missing data and even completely dropping. I also cannot do PROXI alignment.

Will fix with resistors and capacitors from post #1 solve my problem?

[vercingetorig]

Hi guys,

I have a bluetooth Elm interface and i removed the R04 resistor and it works pretty fine but first of all i would ask you how can i modify the pin's connection to get an Elm19 interface because i dont want spend other money!! I prefer make it myself! Really really thanks for help me!

P.s. I said "it works pretty fine" because when i try to read engine ecu che connection isn't stable and always after few seconds it dropped off to main page

Sorry for my bad english!!

Guys maybe i found the solution...let me now if i'm right! So, this is the circuit of adapter A3

OBDAdapter3.png (52.11 KiB) Viewed 10500 times

My connector has the wires connected in the same positions of the 1 image (4-5-6-7-14-16)...if i disolder those and solder them in the positions like the 2 image? Have i an ELM19 interface?! Thankssssssssssssss

[lolo85v]

I I have this message for accer has abs he(it) needs an adapter?
THANK YOU

http://i34.servimg.com/u/f34/13/84/33/82/feslol10.png

[betyargabor]

Hy All!

I bought an ELM327 interface with bluetooth, but cant connect to ECU. I tested with my Android phone with Torque software. The Phone can connect to ELM327, but not find the interface, just automatic search infinite(loop).
I tested with my laptop, but the multiecuscan cant connect to ECU.

I have this interface:
Name:

Front:

Back:


What can i do?
- Did you removed only R04 resistor and ELM 327 interface worked OK with CAN line? or
- Did you removed the R04 resistor and installed 2 resistors of 100 Ohm and 2 capacitors of 560 pF on CAN line (pin 14 and pin 6)? or
- Did you removed the R14 resistor and installed 2 resistors of 100 Ohm and 2 capacitors of 560 pF on CAN line (pin 14 and pin 6) as Yani described in this topic on first page?
- Or something else?

My Car is Punto 1.2 16V.

[Alfaeddy]

Code: Select all

- Did you removed only R04 resistor and ELM 327 interface worked OK with CAN line

Hello

Your first point is the right one!

Greetings Eddy

[vercingetorig]

hello betyargabor, i have the same interface and i removed the R04 resistor and it works good!!

[knata]

I have this elm interface. I can connect to engine ecu but cant connect to can with my Alfa 147 .
Is it possible to repair it to work with can line?
Thanks for help in advance.

[Siscoo]

Hi Eddie,

I have the same model ELM usb 1.4 like Master123 and Alba_Sky, i just checked the PCB. Connection to engine fine, then the rest is connection failure. I read true the whole 36 page of this thread, i found if i change the properties in the com port/device manager to latency 1ms there is no latency problem in the multiecuscan test (before was). And start all the module (except ABS/airbag i havent got an adapter) but after 2 secs is jumping back to the main window.

Sum:
Driver ok, all test/commands ok, connection to engine ok, i did an oil change reset. This fine...
Dash/Body/Service connecting for 2 secs then going back to main screen (i recorded: http://siscoo.biz/tmp/video0043.3gp)

For the service need to run the engine or just simply key in ignition?
I cant check at the moment because the bloody battery on charger, i think its dying... maybe this made the connection problem? I just ordered one.
Any ideas? Tomorrow testing.

Thanks,