Japan Vehicles Diagnostics

Для проверки CAN-bus/ECM Network of Vehicles вполне может пригодиться и такой малыш The PCAN-USB adapter enables simple connection to CAN networks.
The package is also supplied with the CAN monitor PCAN-View for Windows® and the programming interface PCAN-Basic.
Feature.

• - Adapter for the USB connection (Full-Speed mode, compatible with USB 1.1, USB 2.0, and USB 3.0)
  - High-speed CAN connection (ISO 11898-2)
  - Bit rates from 5 kbit/s up to 1 Mbit/s
  - Time stamp resolution approx. 42 µs
  - Compliant with CAN specifications 2.0A (11-bit ID) and 2.0B (29-bit ID)
  - CAN bus connection via D-Sub, 9-pin (in accordance with CiA® 303-1)
  - NXP SJA1000 CAN controller, 16 MHz clock frequency
  - NXP PCA82C251 CAN transceiver
  - 5-Volt supply to the CAN connection can be connected through a solder jumper, e.g. for external bus converter
  - Galvanic isolation on the CAN connection up to 500 V (only for IPEH-002022)
  - Voltage supply via USB
  - Extended operating temperature range from -40 to 85 °C

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Возможности PCAN-OBD-2 API (API implementation of the OBD-2 Standard ISO 15765-4) и PCAN-PassThru API (PassThru API and Connection of PassThru Software to PEAK CAN Interfaces) описаны в http://www.phytools.com/PCAN_APIs_s/1867.htm

Было бы любопытно "подслушать", например, диалог между Techstream и компами автомобиля...

Apparently, is needed the Clarification.
The video shows "eavesdropping conversations" on the CAN-bus and only that. The very content of the "dialogues" between the ECUs is unknown to me. 

Notes. The interface PCAN and free CAN VIEWER programm came to me by accident and I was curious to know what I can see with use they, only this Reason.
The file for the new Teslas RAV4EV firmware (1.3.101) NOT load from ECU memory and not by using PCAN Viewer or others programm and no with PCAN or others interfaces.