Have a 2009 MMH that sat too long and had 267 V prior to jumping. Voltage now 343V Del_MOD_V varies between 0.19 and 0.25. after about 6 hours of charging.
The only codes that I see after clearing following charging is P1000.
Engine is not cranking.
12V battery is fully charged.
Suggestions?

 

I figured it out. It was the ignition housing. Pushed the key in while turning and it started.

 

Yep. Pretty common issue. I've encountered several with that issue.

 

Thanks for commenting. I'm not sure if it is the lock cylinder or the housing that is the culprit as I have difficulty inserting the key..Any idea on how to take out the cylinder without the key? I have a junkyard housing that I needs the cylinder removed.
Finally, I want to express my appreciation for your post detailing the jump method. The only mistake I made was to check voltage using Forscan while the hla-120g-c350a was plugged-in, it blew the fuse. Was wondering why after 4 hours of charging it was lower that the 2 hour reading.

 

The lock cylinders fail left and right. It's pervasive across this and other models.

Glad you were able to get some good out of it!

Did you have a diode installed? Very surprised if a fuse popped when a diode is present.

 

I think part of your comment is missing. Have i tried what?
The reason I'm asking is that I have an ignition housing out of a 2012 FEH from the junkyard that I need the lock cylinder removed so that I can swap in my lock cylinder to see if was the housing mechanism vs the lock cylinder. I do not have the key to the junkyard housing to make the cylinder removal easy, so I need another method to remove said cylinder without the key.
I had two diodes soldered on to the battery side of the charging brick exactly as pictured in the diagram. It was really my first time soldering, so maybe I messed something up, but when I unplugged the brick to check voltage via Forscan, the fuse did not blow.

 

Sorry. Went off in the wrong direction and didn't remove all the evidence.