Hi,
I'm a recent Alphard owner, bought 2005 2.4 Hybrid E4.
Great machine, but I have also experienced the same problem. Amber VSC, Exclamation, and red car on lift light. Loss of power and cut out. I tested with a launch that gave me a low voltage on the 12v side and C1310 HV System Malfunction.
The 12v battery was low, I disconnected the battery and the fault left. Driving fine, but another cold morning has brought the fault back.
I know it needs needs a new 12v battery and that is my next step. If the problem persists, then what I gather from the thread so far is it could be few things.
1) Inverter
2) HV Battery cells
Any further updates would help a lot. Maybe an indication of repair costs, as I might have to give the car back if it's too expensive.
Thanks.