slhutzley wrote: ↑Fri Apr 14, 2023 6:53 pm
I’d be interested to know more about this if anyone has experience with it. Thanks
I've dug up this post mentioning where it can be jumpered for the PCM loop. viewtopic.php?p=33687#p33687
Unfortunately I've gone through so many different service pages in the past, it's difficult to trace knowledge back. The manual seems to indicate there are at least 3 HVILs in the vehicle. One monitor by the PCM (heater, DC/DC, etc), one between the SOBDM and the battery and another between the BECM and the battery. Those might be shared but HVIL is actively monitored by each of those modules.
That said, what I'm remembering was an input sequence that tells it to ignore HVIL for the current start or a diagnostic command that could be sent to do the same. I'll keep spelunking in the manuals to see what else I can turn up.
If you do pull the codes, it should tell you which module is seeing the HVIL fault and may narrow it down to 1 or 2 plugs.
Edit: The plug you seem to be describing is C4805E - 40 pins. If so there are a lot of signals there and any one of them could trigger a fault.