Page 492 of 572
4927-2. Steps to take in an emergency
HIGHLANDER HV_U
If you have a set of jumper (or 
booster) cables and a second 
vehicle with a 12-volt battery, 
you can jump start your vehicle 
by following the steps below.
1Confirm that the electronic 
key is being carried.
Vehicles with an alarm: When con-
necting the jumper  (or booster) 
cables, depending on the situation, 
the alarm may acti vate and doors 
locked. ( P.82)
2 Open the hood ( P.408) and 
fuse box cover.
3 Open the exclusive jump 
starting terminal cover.
4 Connect a positive jumper cable clamp to   on your vehicle and 
connect the clamp on the other end of the positive cable to   on  
the second vehicle. Then, connect a negative cable clamp to   Restarting the hybrid sys-
tem 
     
        
        Page 493 of 572

4937-2. Steps to take in an emergency
HIGHLANDER HV_U
7
When trouble arises
on the second vehicle and connect the clamp at the other end of 
the negative cable to  .
Exclusive jump starting terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery term inal (second vehicle)
Solid, stationary, unpainted metallic point away from the exclu sive 
jump starting terminal and any m oving parts as shown in the illus-
tration
5 Start the engine of the sec-
ond 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 start 
the hybrid system of your 
vehicle by turning the power 
switch to ON.
8 Make sure the “READY” indi-
cator comes on. If the indica- tor light 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.
10Close 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. 
     
        
        Page 495 of 572

4957-2. Steps to take in an emergency
HIGHLANDER HV_U
7
When trouble arises
• 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 12-volt battery prior to the 
replacement. (Depending on the 
12-volt battery to be replaced, the 
exhaust hole may be plugged.)
Exhaust hole
Exhaust hole plug
Exhaust hose
Hole section of the vehicle
For details, consult your Toyota 
dealer.
WA R N I N G
■When removing the 12-volt 
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, l eading to a fire 
in addition to electrical shocks 
and death or serious injury.
■When disconnecting the 
12-volt battery
Do not disconnect the negative (-) 
terminal on the body side. The 
disconnected negative (-) terminal 
may touch the positive (+) termi-
nal, which may cause a short and 
result in 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.
●Do not allow the + and - clamps 
of the jumper cables to come 
into contact with each other.
●Do not smoke, u se matches, 
cigarette lighters or allow open 
flame near the 1 2-volt battery.
■12-volt battery precautions
The 12-volt battery contains poi-
sonous and corrosive acidic elec-
trolyte, 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 bat-
tery. 
     
        
        Page 496 of 572

4967-2. Steps to take in an emergency
HIGHLANDER HV_U
WA R N I N G
●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 sup-
port, terminals, and other bat-
tery-related parts.
●Do not allow child ren near the 
12-volt battery.
■After recharging the 12-volt 
battery
Have the 12-volt battery 
inspected at your Toyota dealer 
as soon as possible.
If the 12-volt battery is deteriorat-
ing, continued use may cause the 
12-volt battery to emit a malodor-
ous gas, which may be detrimen-
tal to the health of passengers.
■When replacing the 12-volt 
battery
●When the vent plug and indica-
tor are close to  the hold down 
clamp, the battery  fluid (sulfuric 
acid) may leak.
●For information regarding 
12-volt battery replacement, 
contact your Toyota dealer.
●After replacing, securely attach 
the exhaust hose  and exhaust 
hole plug to the exhaust hole of 
the replaced 12-volt battery. If 
not properly installed, gases 
(hydrogen) may  leak into the 
vehicle interior, and there is the 
possible danger of the gas ignit-
ing and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper 
cables, ensure that they do not 
become entangled in the cooling 
fan or belt.
■To prevent damaging the 
vehicle
The exclusive jump starting termi-
nal is to be used  when charging 
the 12-volt battery from another 
vehicle in an emergency. It cannot 
be used to jump start another 
vehicle.