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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
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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
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5-2. Steps to take in an emergency
CAUTION
■
Avoiding 12-volt battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flam-
mable gas that may be emitted from the 12-volt battery.
●Make sure each jumper cable is connected to the correct terminal.
● Do not allow the ends of the jumper cable used for the “+” terminals to
come into contact with any other parts or metal surface in the area, such
as brackets or unpainted metal.
● Do not allow the “+” and “-” terminals of the jumper cables to come into
contact with each other.
● Do not smoke, use matches, cigarette lighters or allow open flame near
the 12-volt battery.
■ 12-volt battery precautions
The 12-volt battery contains poisonous and corrosive acidic electrolyte,
while related parts contain lead and lead compounds. Observe the following
precautions when handling the 12-volt battery.
●When working with the 12-volt battery, always wear safety glasses and
take care not to allow any battery fluids (acid) to come into contact with
skin, clothing or the vehicle body.
● Do not lean over the 12-volt battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
● Always wash your hands after handling the 12-volt battery support, termi-
nals, and other battery-related parts.
● Do not allow children near the 12-volt battery.
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388 5-2. Steps to take in an emergency
NOTICE
■When handling jumper cables
Be careful that the jumper cables do not become tangled in the cooling fans
or any of the belts when connecting or disconnecting them.
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5-2. Steps to take in an emergency
If your vehicle overheats
Correction procedures■ If “WATER TEMP” is shown on the multi-information display
Stop the vehicle in a safe plac e and turn off the air condition-
ing system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the hybrid system. Carefully lift the hood after the
steam subsides and then restart the hybrid system.
If you do not see steam: Leave the hybrid system operating and carefully lift the
hood.
Check to see if the cooling fan is operating.
If the fans are operating: Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the hybrid
system.
If the fans are not operating: Stop the hybrid system imme diately and call your Toyota
dealer.
The following may indicate that your vehicle is overheating:
● “WATER TEMP” is shown on the multi-information display:
The engine may be overheating.
● “HYBRID SYSTEM OVER HEAT” is shown on the multi-informa-
tion display:
The power control unit may be overheating.
Follow the correction procedure as described below.
STEP1
STEP2
STEP3
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390 5-2. Steps to take in an emergency
After the hybrid system has
cooled down sufficiently, check
the engine coolant level and
inspect the radiator core (radia-
tor) for any leaks.
Add engine coolant if necessary.
Water can be used in an emer-
gency if engine coolant is unavail-
able.
(→P. 401)
■ If “HYBRID SYSTEM OVER HEAT” is shown on the multi-infor-
mation display
Stop the vehicle in a safe plac e and turn off the air condition-
ing system.
Leave the hybrid system operating and carefully lift the hood.
Check if the cooling fans are operating.
If the fans are operating: Wait until “HYBRID SYSTEM OVER HEAT” disappears and
then stop the hybrid system.
If the message does not disapp ear, call your Toyota dealer.
If the fans are not operating: Stop the hybrid system immediately and call your local
Toyota dealer.
STEP4
STEP5
STEP1
STEP2
STEP3
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391
5-2. Steps to take in an emergency
After the hybrid system has
cooled down, check the power
control unit coolant level and
inspect the cooling system for
leaks.
Add power control unit coolant if
necessary.
Water can be used in an emer-
gency if power control unit cool-
ant is unavailable. (
→P. 401)
Have the vehicle checked at the nearest Toyota dealer as soon as
possible.
STEP4
STEP5
■Overheating
The following symptoms may occur when your vehicle is overheating:
●Hybrid system output decreases.
● Steam is coming from the engine area.
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392 5-2. Steps to take in an emergency
CAUTION
■To prevent an accident or injury when inspecting under the hood of
your vehicle
● If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injury such as burns.
● With a hybrid vehicle, there are times when the gasoline engine automati-
cally starts to run or the cooling fans suddenly start to operate. Do not
touch or approach the rotating parts of the belt or fans. Doing so may lead
to fingers, clothes or tools getting caught, resulting in an accidental injury.
● Do not loosen the coolant reservoir cap while the hybrid system and radia-
tor are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.