Purchased one today and gave it a try, not too sure what I am doing yet, I ran it through most of the ecu's and the only fault it seemed to indicate ( no fault codes that I saw may have missed them) is reproduced below. can anyone throw some on this information, it was in the BCC. I did the test sat in the car the radio was on and my phone was in my pocket.
The CAN data communication line (Controller Area Network) between different vehicle ECUs does not work correctly.
The CAN BUS is a connection between ECUs which enables them to share information and synchronize the function of the different systems. Depending on the vehicle, the CAN line can link the engine, ETC, ESP, ABS, Immobilizer, AirBag (SRS), A/C system (CC) etc.
Check the harness between the ECUs for opens, shorts and weak connections, and ripple free power and good ground supplies to the ECUs.
Ensure that no additional equipment emitting strong radio or magnetic fields is installed close to the ECU wiring (car telephone, stereo speaker wires etc.)
The fault is intermittent. Clear fault codes, and observe for future appearance of the same fault. Dashboard warning light was not activated for this fault.