2001 LX470 no crank when cold, Only when Warmer than 40f (2 Viewers)

[medtro]

What is also strange... when running off the aux battery in the trunk ( main battery disconnected) above 40 degrees with just 9volts the car would turn over and start... I am so lost.

Move the main battery to aux battery tray to see if you have the same problem. This should narrow down the problem area.

I think there is something else going on if you were able to start with 9V.