When i connect Volvo VCADS pro 2.40 truck diagnostic interface with vehicle and laptop, it gave me error 10103
No communication with control unit or vehicle.
No connection with vehicle, check the communication unit and its wiring and power supply.
No Leds lights when connect to the computer, there is only LED for vehicle connection.
Obdii365.com engineer solution:
You connected device with laptop in a wrong way.
You should connect Volvo VCADS device with laptop via COM port (through com cable) but not USB port
Volvo PTT 2.40 supports Windows XP System.
Recommend using Dell D630 laptop.
Hope this helps.