W203 C180 cant connect ODB-2

[Handed3219]

I've an ODB-2 tool for reading diagnostics for my W203 C180 but recently i can't connect anymore and doesn't give me any output.
How can i troubleshoot if there's an issue with the ODB-2 interface?

 

[Dublover]

You may want to describe what OBD-2 tool you are using, maybe a photo of the interface?

 

[kaurisalkdasjds]

Do you have another car that you could try or other diagnostic tool. what tool are you using specifically that you have problems on?

 

[andresz28]

Check the power and ground lines from the obd connector, probably a fuse blew and thats why you cant connect to the ecu

 

[berkesmob]

Sometimes issue is broken pins but most of the time it is software related either the the software and the obd is incompatible, sometimes they sell obd 2 with only compatible with android etc. if it is the app issue i can recommend popular one named as Car Scanner in app store

 

[fetteblutzn]

For anyone wondering: When using an OBD to USB adapter it is necessary to set the Port (COM1 - COMxy) right in Windows and in the config of the software you're using. I also had problems before with the BAUD-Rate but that was for a very specific tool.

 

[prcak2005]

But why to connect it wired, try to connect via Bluetooth? On my last car that is how I was checking codes.

 

[Selectronic]

1. check power supply 12v (pin 16) and GND (pin 4, 5) on OBD connector