Help identify the problem

Exact code after good scanning is P0AA6-305

 

Are you sure it was INF 305, it sounds off. Which OBD2 reader retrieved the above DTC P0AA6 (aka P3009) with INF 305?

Notice in techstream (image below) how 'Detail Code 2' has an INF (subcode) of 526. and 'Detail Code 3' has INF 612



Though dated, here is the workup for DTC P0AA6/P3009 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/21bpm/3009526.pdf

Below is a visual, combine this with the INF and it can help guide you towards the problem area.

 

I tested the AC compressor for leaking power by disconnecting the cable then clear codes and tried driving but code comes back again...
I tested the invertor by using voltmeter connecting ground to car body and positing to the body of the invertor (synergy drive box) but no voltage detected...
Last 2 things I need to test is the transaxle but not sure how to test this one? Then last thing is the battery... If someone knows how to test the Transaxle please

Thanks

 

That's guaranteed to show you no voltage detected: the inverter box is bolted to the car body.

Testing for HV leakage has to be done by following the procedures in the repair manual (or closely equivalent, as in reading them and designing equivalent tests).

 

Do you have that procedure handy please?

 

Elektroingenieur kindly put effort into a wiki page with a lot of the ways one can access the repair manual, all described in one place.