ECU

Check the fuses

Could it be that the ecu needs to be replaced. How is it related with the fuses

You could have a bad ECU or wiring between the DLC and the ECU.

Try using a different scan tool to see if it works.

fuses provides power supply to the ECU amnd DLC, so if you have a power supply fault, the scan tool would not work.

Thank you all.

it sounds like there is a conflict on the communication bus. if one or more computers cannot communicate with each other, you need to disconnect one at a time till you can communicate. this is best donen by a shop that is expierenced with this diag.

Roy

@ASEMaster. Disconnect what from what?

you have around 5 or 6 computers in your car. these control units all talk to each other and when one cant talk, a communication error starts. it is hard to say which one being as i cannot touch the car. locating each unit and disconnecting the power will disable it and thats how you do it. at the aldl connector, there should be a certain voltage on the communication bus line. it needs to be checked as each unit is disconnected.
this is why i said you are better off letting a shop help you as they have the expierence with these diags.

Roy

Thanks