FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)

[Alfaeddy]

The rezistor it is the on one in parallel with the OBD II pins 6 and 7
You need to check it with a multimeter becasue it is a littel bit dificult to get to it
Good luck

Hallo Mattydr67

"The rezistor it is the one on in parallel with the OBD II pins 6 and 7"

Sorry but this statement is not correct
The resistor is parallel on Pin 6 + 14


Greetings Eddy

[mattydr67]

Yes that's right OBD II opins 6 and 14
I thinked at MCP2551 pins 6 and 7 but I writed OBD II
Good luck

[Marco]

Sorry but this statement is not correct
The resistor is parallel on Pin 6 + 14

Thank you all for the help.

I opened my BT interface, and from what I understand, you have to eliminate the resistance highlighted in red, between the two channels of balanced line of CAN, H and L (I think it is not correct to put this resistance, if we had 10 devices with a resistance of 100 ohm, there is a parallel resistance of 10 100 for a value of only 10 OHM, and it would be too low).

Give me kindly confirm what I wrote;)


Thanks to all
greetings
mark

[Alfaeddy]

Hello Mark

Just right
This is the bridge resistor causes the CAN bus problems with MES.

Greetings Eddy

[Marco]

Hello Mark

Just right
This is the bridge resistor causes the CAN bus problems with MES.

Greetings Eddy

Thank you,
I removed the resistor, and now I can read the data,
with AlfaOBDDemo, I can read data from Body computer and instrument panel
In addition, the alarm has resumed normal operation.

I still can not run the program "Launch Delta.apk"
 
thank you very much and Matty Eddy

mark

[edoixxx]

Can anybody take a look on attached interface and tell me please if I have to do any modification ?

Thank you all in advance

[Alfaeddy]

Hello edoixxx

What problem you have?
What controls you can not read?

Because this bridge resistor was just for the CAN bus protocol.


When it comes to the CAN bus, then remove this red marked resistor

Greetings Eddy

DSC_0509 markiert.jpg (308.7 KiB) Viewed 8712 times

[edoixxx]

I am only able to read engine data .
ABS , electric steering , instrument cluster and all other functions give a error to check cable,
That means that I have to remove the marked resistor marked by you ?

Thank you for your quick reply

[Alfaeddy]

Hello edoixxxx

What car?
So it looks like yes

Remove the marked resistance and try again

My question therefore is send from your boards the many me pictures
but not all have controls that are read via CAN bus.


Greetings Eddy

[mikcsek]

Hi folks,

Can anybody help me?

I have a car Fiat Bravo 1,6 16V and I bought a diag cable + 3 PIN cable, but when I connect it to the diag. connector, I get an error message: connection failed, didn't find interface.

But in the setting if I push the test button, it says its ok.
I can only use the SCAN button, but it show only the engine type and ISO code.

Is there a way to connect to the engine and see other properties?




Second picture is in hungarian language, but it say connection error, didn't find interface.