Put on the last bits of unicorn poo reinforced unobtanium, finishing a post-purchase teardown.
Also replaced all the shiny useless buttonhead bolts with something a little scurier.
For those that have an USB-OBD2 cable with a CH340 chip instead of the recommended FTDI232RL.
Connect pins 4 and 5 in the OBD2 connector to get GND to pin 5.
Tested on mine and found to be working.