Car OFF
Using Matt's pic above, check that Signal terminal (Toyota calls it D9; I call it the Logic connector) at pins 5 & 6 should yield close to zero ohms, and that will check all three KET connectors (Cabin Heater, A/C Compressor, Battery Heater) as well as the HV input HVIL switch I noted in a pic earlier. If you get zero ohms for a reading there, then you don't have to chase anything plugged into the DC-DC Converter.
[ATTACH=full]1300[/ATTACH]
Then, on the D9 connector (at the harness side this time), check the same pins. From a post in the thread I referenced above:
[ATTACH=full]1299[/ATTACH]
That should yield 240Ω (car OFF).
[ATTACH=full]1301[/ATTACH]
See this post in that same thread, where I describe how to do this. Do not try to force your meter's probes into that connector, use ball pins or equivalent as I described in that post.
If not, then you have to proceed to check the HVIL for other units at their respective connectors: LDU, HV Battery
