2018 LEXUS LS500 jump cable

438 7-2. Steps to take in an emergency
LS500_OM_OM50F54U_(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. 
Method connecting jumper (or
booster) cables to the battery
1 Confirm that the electronic key is
being carried. When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked.
( → P.61)
2 Open the trunk lid and remove the
luggage mat. ( → P.339)In the event that the trunk opener cannot
be used, use the mechanical key to open
the trunk. ( → P.436)
3 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
connect a negative cable clamp to on the second vehicle and connect the
clamp at the other end of the negative cable to .
Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Negative (-) battery terminal (your vehicle)If the vehicle battery is dis-
charged The following procedures may be
used to start the engine if the vehi-
cle’s battery is discharged.
You can also call your Lexus dealer
or a qualified repair shop.
Restarting the engine
A
B
C
D
A
B
C
D

4397-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U) 7
When trouble arises 4 Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the battery of your vehi-
cle.
5 Open and close any of the doors of
your vehicle with the engine switch
off.
6 Maintain the engine speed of the
second vehicle and start the engine
of your vehicle by turning the
engine switch to IGNITION ON
mode.
7 Once the vehicle’s engine has
started, remove the jumper cables
in the exact reverse order from
which they were connected. 
Method connecting jumper (or
booster) cables to the exclusive
jump starting terminal
1 Confirm that the electronic key is
being carried.When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked.
( → P.61) 2 Open the hood. Remove the pas-
senger side engine compartment
cover. ( → P.375, 378)
3 Remove the service
cover.( → P.379)
4 Open the fuse box cover. Push the tab in and lift the lid off.
5 Open the exclusive jump starting
terminal cover.
6 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then, A
B

440 7-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U) connect a negative cable clamp to 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 terminal (second vehicle)
Solid, stationary, unpainted metallic point away from the exclusive jump starting
terminal and any mo ving parts as shown in the illustration
7 Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the battery of your vehi-
cle.
8 Open and close any of the doors of
your vehicle with the engine switch
off.
9 Maintain the engine speed of the
second vehicle and start the engine
of your vehicle by turning the
engine switch to IGNITION ON
mode.
10 Once the vehicle’s engine has
started, remove the jumper cables
in the exact reverse order from
which they were connected. 11 Close the exclusive jump starting
terminal cover, and reinstall the fuse
box cover to its original position.
12 Install the service cover.( → P.379)
13 Install the engine compartment
cover.
Once the engine starts, have the vehi-
cle inspected at your Lexus dealer as
soon as possible. ■
Starting the engine when the battery is
discharged
The engine cannot be started by push-start-
ing.
■
To prevent battery discharge
●
Turn off the headlights and the audio sys-
tem while the engine is off.
●
Turn off any unnecessary electrical com-
ponents when the vehicle is running at a C
D
A
B
C
D

442 7-2. Steps to take in an emergency
LS500_OM_OM50F54U_(U) WARNING■
When removing the battery terminals
Always remove the negative (-) terminal
first. If the positive (+) terminal contacts
any metal in the surrounding area when
the positive (+) terminal is removed, a
spark may occur, leadin g to a fire in addi-
tion to electrical shocks and death or
serious injury. ■
Avoiding battery fires or explosions
Observe the following precautions to
prevent accidentally igniting the flamma-
ble gas that may be emitted from the bat-
tery: ●
Make sure each jumper cable is con-
nected to the correct terminal and that
it is not unintentiona lly in contact with
any other than the intended terminal.●
Do not allow the other end of the
jumper cable connected to the “+” ter-
minal 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, use matches, cigarette
lighters or allow open flame near the
battery.
■
Battery precautions
The battery contains poisonous and cor-
rosive acidic electrolyte, while related
parts contain lead and lead compounds.
Observe the following precautions when
handling the battery:
●
When working with the 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 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 ha nds after handling
the battery support, terminals, and
other battery-related parts. ●
Do not allow children near the battery. ■
After recharging the battery
Have the battery inspected at your Lexus
dealer as soon as possible.
If the battery is deteriorating, continued
use may cause the battery to emit a mal-
odorous gas, which may be detrimental
to the health of passengers. ■
When replacing the battery ●
When the vent plug and indicator are
close to the hold down clamp, the bat-
tery fluid (sulfuric acid) may leak. ●
For information regarding battery
replacement, contact your Lexus
dealer. ●
After replacing, se curely attach the
exhaust hose and exhaust hole plug to
the exhaust hole of the replaced bat-
tery. If not properly installed, gases
(hydrogen) may leak into the vehicle
interior, and there is the possible dan-
ger of the gas igniting and exploding.
NOTICE
■
When handling jumper cables
When connecting the jumper cables,
ensure that they do not become entan-
gled in the cooling fan or engine drive
belt.
■
To prevent damaging the vehicle
The exclusive jump starting terminal is to
be used when chargi ng the battery from
another vehicle in an emergency. It can-
not be used to jump start another vehicle.