I'd like to learn more about this. Can you point me to where you came across that information? It certainly sounds reasonable under healthy vehicle conditions.The 12 volt battery does NOT, NOT, NOT start the hybrid. The 12 volt powers the ECU, lights, radio etc.
The traction battery, the BIG HIGH VOLTAGE ONE, starts the ICE in the hybrid. Not enough juice in the 12 volt, no start without a jump. Not enough in the traction battery to spin the ICE, SCREWED.
I noticed that the owner's manual directs hybrid owners to make use of a booster vehicle's 12V connections when it's necessary to jump start the hybrid. It even indicates to leave both engines running for 3 mins after starting. To me that suggests that the 12V battery may function as a redundant backup starter in the event of a dead traction battery. Not sure how jump starting off a 12V booster could work if that capability isn't there. Maybe the resource you found has more details about such scenarios?
Sponsored