FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)

[Gatter]

Hello!

I have the same problem than the others! I can connect only to the engine, and I can't to CAN, Dashboard, Body, etc.. (Orange-blue chineese interface, tested on Punto 1.2 16V '03, and Stilo 16 16V '03)

I've removed the 'R04' 121 resistor, but the problem doesn't solved! May I need to remove the 'R17' 173 too?

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[Alfaeddy]

Hallo Gatter

No, not remove R17 this Resistor have nothing to do with CAN Bus

Control with a Multimeter the wire from Pin 6 and Pin 14 to Chip MCP2551 terminal 6 and 7
And both lines 6 and pin 14 is not connected.

previously these were indeed connected to the resistor and was separated.

Greetings Eddy

[Gatter]

Thanks for fast reply Eddy!

These are the MCP chip 6 and 7 terminal?

[Alfaeddy]

Hello

It´s right !!


Greetings Eddy

[Gatter]

Pin6 to MCP terminal 6 -> connected!!
pin6 to MCP terminal 14 -> not connected
pin14 to MCP terminal 6 -> not connected
pin14 to MCP terminal 7 -> connected!!

[Alfaeddy]

Pin6 to MCP terminal 6 -> connected!!
pin6 to MCP terminal 7 -> not connected
pin14 to MCP terminal 6 -> not connected
pin14 to MCP terminal 7 -> connected!!

Hello Gatter

I think you write a little mistake for 14 you mean 7 , its right ?


When you test Pin 6 to Pin 14 -> not connected

then in think your ELM ist wrong for CAN Bus Protokolls


Gruß Eddy

[Gatter]

Yes you're right!!

Pin6 to MCP terminal 6 -> connected!!
pin6 to MCP terminal 7 -> not connected
pin14 to MCP terminal 6 -> not connected
pin14 to MCP terminal 7 -> connected!!

That's it:

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So I can buy a new ELM?

[Alfaeddy]

Hello gatter

I can think of no other possibility
since your ELM works in the KWP2000 protocol

This ELM has no bridge resistance
send a greeting from me (Eddy)

http://www.ebay.de/itm/160996649487?_tr ... EBIDX%3AIT

Greetings Eddy

[Gatter]

Thanks Eddy! I've asked refund from the seller. And I give a chance for another 10$ chineese ELM327 maybe...

Now I have an ELM what only connects to the engine. Can we try any russian roullette on it? So 'ALL IN' that may starts to work. No problem if it go totally wrong. Have you got any idea?

[Alfaeddy]

Hello

It's odd that only the CAN protocol does not work
Therefore, I have a defective suspected.

Have you ever test on MES / Settings / Interfaces / ELM / test button?
What is displayed there. ?

And your driver is new?


Greetings Eddy