Anyone know whether same procedure works for Camry?
I may try.
And: Are we sure that 15 v. would be too much. A lot of aux. auto battery chargers would do 15 v.
1. There is a good chance that a variation of this procedure will work on a Camry Hybrid, Highlander Hybrid, or Lexus Hybrid as Toyota tends to be consistent.
One reported alternate sequence to get to the Maintenance screen is a sequence of screen touches:
"Push DISPLAY and then instead of Upperleft, Downleft,Upperleft, Downleft,Upperleft, Downleft try Upperleft, Upperright, Upperleft, Upperright, Upperleft, Upperright."
Report your results back here.
2. 15 volts WILL cook a AGM Lead Acid battery in this case as there is no protection from overcharging the battery. A good charger reduces the voltage as the battery reaches full charge, the DC-DC converter in these hybrids is not that smart. Note that even 14 volts continuous is not good, but the charging circuit is only active in "Ready" mode. For continuous battery maintenance get a "Battery Minder" or Battery Tender" as these systems use safe continuous charging methods. They will safely maintain the little 12v battery when the car is left unused for a long interval (more than 2 weeks).
JeffD