Toyota Camry Hybrid 2018 Owner's Manual page 514

514
7-2. Steps to take in an emergency
5
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
6
Open and close any of the doors of your vehicle with the power
switch off.
7
Maintain the engine speed of the second vehicle and turn the power
switch to ON mode, then start the vehicle's engine.
8
Make sure the "READY" indicator comes on. If the indicator does
not come on, contact your Toyota dealer.
9
Once the hybrid system has started, remove the jumper cables in
the exact reverse order from which they were connected.
10
Close the exclusive jump starting terminal cover, and reinstall the
fuse box cover to its original position.
Once the hybrid system starts, have the vehicle inspected at your
Toyota dealer as soon as possible.