4707-2. Steps to take in an emergency
recharge the 12-volt battery 
of your vehicle.
6 Maintain the engine speed of 
the second vehicle and start 
the hybrid system of your 
vehicle by turning the power 
switch to ON.
7 Make sure the “READY” indi-
cator comes on. If the indica-
tor light does not come on, 
contact your Toyota dealer.
8 Once the hybrid system has 
started, remove the jumper 
cables in the exact reverse 
order from which they were 
connected.
9 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.
■Starting the hybrid system 
when the 12-volt battery is dis-
charged
The hybrid system cannot be 
started by push-starting.
■To prevent 12-vol t battery dis-
charge
●Turn off the headlights and the 
audio system while the hybrid sys-
tem is off.
●Turn off any unnec essary electri-
cal components when the vehicle 
is running at a low speed for an 
extended period, such as in heavy 
traffic.
■When the 12-volt battery is 
removed or discharged
●Information stored in the ECU is 
cleared. When the 12-volt battery 
is depleted, have the vehicle 
inspected at you r Toyota dealer.
●Some systems may require initial-
ization. (P.515)
■When removing the 12-volt bat-
tery terminals
When the 12-volt battery terminals 
are removed, the information stored 
in the ECU is cleared. Before 
removing the 12-vo lt battery termi-
nals, contact your Toyota dealer.
■Charging the 12-volt battery
The electricity stored in the 12-volt 
battery will discha rge gradually even 
when the vehicle i s not in use, due 
to natural dischar ge and the drain-
ing effects of certain electrical appli-
ances. If the vehicle is left for a long 
time, the 12-volt  battery may dis-
charge, and the hybrid system may 
be unable to start. (The 12-volt bat-
tery recharges automatically while 
the hybrid system is operating.)
■When recharging or replacing 
the 12-volt battery
●In some cases, it may not be pos-
sible to unlock the doors using the 
smart key system when the 12-
volt battery is discharged. Use the 
wireless remote c ontrol or the 
mechanical key to lock or unlock 
the doors.
●The hybrid syste m may not start 
on the first attemp t after reinstall-
ing the 12-volt battery. In that 
case, start the hybrid system in 
the same manner as when the 
electronic key  does not operate 
properly ( P.467). This is not a 
malfunction, as the hybrid system 
will start normally on the second 
attempt.
●The power switch mode is memo-
rized by the vehicle. When the 12-
volt battery is reconnected, the 
system will return to the mode it  
4717-2. Steps to take in an emergency
7
When trouble arises
was in before the 12-volt battery 
was discharged. Before discon-
necting the 12-volt battery, turn 
the power switch off.
If you are unsure what mode the 
power switch was in before the 
12-volt battery discharged, be 
especially careful when recon-
necting the 12-volt battery.
●Some systems may require initial-
ization. (P.515)
■When replacing the 12-volt bat-
tery
●Use a 12-volt battery that con-
forms to European regulations.
●Use a battery that the case size is 
same as the previous one (LN2), 
20 hour rate capacity (20HR) is 
equivalent (55Ah) or greater, and 
performance rating (CCA) is 
equivalent (345A) or greater.
• If the sizes differ, the 12-volt bat-
tery cannot be properly secured.
• If the 20 hour rate  capacity is low, 
even if the time period where the 
vehicle is not used is a short time, 
the 12-volt battery may discharge 
and hybrid system may not be 
able to start.
●Use a ventilation t ype calcium bat-
tery
●Use a 12-volt battery with a han-
dle. If a 12-volt b attery without a 
handle is used, removal is more 
difficult.
●When removing the 12-volt bat-
tery:  P.398
●After replacing, firmly attach the 
following items to the exhaust hole 
of the 12-volt battery.
• Use the exhaust hose that was  attached to the 12-volt battery 
before replacing an d confirm that 
it is firmly connected to the hole 
section of t he vehicle.
• Use the exhaust hole plug 
included with the 12-volt battery 
replaced or the one installed on 
the battery prior to the replaced. 
(Depending on the 12-volt battery 
to be replace, the exhaust hole  may be plugged.)
For details, consu lt your Toyota 
dealer.
Exhaust hole
Exhaust hose
Hole section of the vehicle
WARNING
■When removing the battery 
terminals
Always remove the negative (-) 
terminal first. If the positive (+) ter-
minal contacts any metal in the 
surrounding area when the posi-
tive (+) terminal is removed, a 
spark may occur, leading to a fire 
in addition to ele ctrical shocks 
and death or serious injury.
■Avoiding 12-volt battery fires 
or explosions
Observe the following precautions 
to prevent accidentally igniting the 
flammable gas that may be emit-
ted from the 12-volt battery:
●Make sure each jumper cable is 
connected to the correct termi-
nal and that it is not unintention-
ally in contact with any other 
than the intended terminal.
●Do not allow the other end of 
the jumper cable connected to 
the “+” terminal to come into 
contact with any other parts or 
metal surfaces in the area, such 
as brackets or unpainted metal.
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