Page 23 of 444

23
1-1. Hybrid system
1
Before driving
■
Regenerative braking
The electric motor converts kinetic energy to electric energy when:
●The accelerator pedal is released.
● The brake pedal is depressed with the shift lever in D or R.
■ Conditions in which the gasoline engine may not stop
The gasoline engine starts and stops automatically. However, it may not stop
automatically in the following conditions:
●During gasoline engine warm-up
● During hybrid battery (traction battery) charging
● During low or high hybrid battery (traction battery) temperature
■ Charging the battery
●As the gasoline engine charges the hybrid battery (traction battery), the
battery does not need to be charged from an outside source. However, if
the vehicle is left parked for a long time the hybrid battery will slowly dis-
charge. For this reason, be sure to drive the vehicle at least once every
several months for at least 30 minutes or 10 miles (16 km). If the hybrid
battery becomes fully discharged, you are unable to jump-start the vehi-
cle with the 12-volt battery, contact your Toyota dealer.
● If the shift lever is in N, the hybrid battery (traction battery) will not be
charged. When driving in heavy traffic, operate the vehicle with the shift
lever in D to avoid discharging the battery.
■ During normal driving
The gasoline engine is predomi nantly used. The electric motor
(traction motor) charges the hybrid battery as necessary.
■ When accelerating sharply
The power of the hybrid battery (traction battery) is added via
the electric motor (traction moto r) to that of the gasoline engine.
■ When braking (regenerative braking)
The electric motor (traction mo tor) charges the hybrid battery
(traction battery).
Page 385 of 444

5
When trouble arises
385
5-2. Steps to take in an emergency
If the vehicle’s 12-volt battery is discharged
The following procedures may be used to start the hybrid system if
the vehicle's 12-volt battery is discharged.
You can call your Toyota dealer or qualified repair shop.
If you have a set of jumper (or boo ster) cables and a second vehi-
cle with a 12-volt battery, you can jump start your Toyota following
the steps below.
Open the trunk lid and remove the 12-volt battery cover.
(→ P. 300)
In the event that the trunk opener cannot be used, use the
mechanical key to open the trunk. ( →P. 382)
Connecting the jumper cables
If required, remove all vent plugs from the booster battery. Lay a
cloth over the open vents on the booster battery. (This helps
reduce the explosion hazard, personal injuries and burns.)
Positive (+) battery terminal on your vehicle
Positive (+) battery terminal on the second vehicle
Negative (-) battery terminal on the second vehicle
Connect the jumper cable to ground on your vehicle as shown in
the illustration.
STEP1
STEP2
Page 386 of 444

386 5-2. Steps to take in an emergency
■Avoiding a discharged 12-volt battery
●Turn off the headlights and the audio system while the hybrid system is
turned off.
● Turn off any unnecessary electrical components when the vehicle is run-
ning at a low speed for an extended period, such as in heavy traffic, etc.
■ When the 12-volt battery is removed or discharged
●The hybrid system may not start. ( →P. 301)
● The tire pressure warning system must be initialized. ( →P. 305)
■ Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
Start the engine of the second vehicle. Increase the gaso-
line engine speed slightly and maintain at that level for
approximately 5 minutes to recharge the 12-volt battery of
your vehicle.
Open and close any of the doors with the “POWER” switch
OFF.
Maintain the engine speed of the second vehicle and turn
the “POWER” switch to ON mode, then start the hybrid sys-
tem.
Make sure the “READY” indicator comes on. If the indicator
does not comes on, contact your Toyota dealer.
Once the hybrid system has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the hybrid system starts, ha ve the vehicle checked at your
Toyota dealer as soon as possible.STEP3
STEP4
STEP5
STEP6