battery lexus LC500 2018 Repair Manual

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6-3. Do-it-yourself maintenance
Maintenance and care
The 12-volt battery is located in the
trunk.
■Before recharging
When recharging, the 12-volt battery pro- duces hydrogen gas which is flammable and explosive. Therefore, observe the fol-
lowing precautions before recharging:
●If recharging with the 12-volt battery
installed on the vehicle, be sure to discon- nect the ground cable.
●Make sure the power switch on the char-ger is off when connecting and discon-necting the charger cables to the 12-volt
battery.
■After recharging/reconnecting the 12- volt battery
●Unlocking the doors using the smart entry & start system may not be possible immediately after reconnecting the 12-
volt battery. If this happens, use the wire- less remote control or the mechanical key to lock/unlock the doors.
●Start the engine with the engine switch in ACCES-
SORY mode. The engine may not start with the engine switch turned off. However, the
engine will operate nor- mally from the second attempt.
●The engine switch mode
is recorded by the vehicle. If the 12-volt battery is reconnected, the vehicle will return the engine switch
mode to the status it was in before the 12- volt battery was disc onnected. Make sure to turn off the engine switch switch> before disconnect the 12-volt bat- tery. Take extra care when connecting the 12-volt battery if the engine switch
mode prior to discharge is unknown.
If the engine will not start even after multiple attempts at all methods above, contact any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer.
12-volt battery
Location
WARNING
■Chemicals in the 12-volt battery
The 12-volt battery contains poisonous
and corrosive sulfuric acid and may pro- duce hydrogen gas which is flammable and explosive. To reduce the risk of death
or serious injury, take the following pre- cautions while working on or near the 12-volt battery:
●Do not cause sparks by touching the
12-volt battery terminals with tools.
●Do not smoke or light a match near the 12-volt battery.
●Avoid contact with eyes, skin and clothes.
●Never inhale or swallow electrolyte.
●Wear protective safety glasses when
working near the 12-volt battery.
●Keep children away from the 12-volt battery.
■Where to safely charge the 12-volt battery
Always charge the 12-volt battery in an open area. Do not charge the 12-volt bat-
tery in a garage or closed room where there is insufficient ventilation.

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6-3. Do-it-yourself maintenance
Pull the strap upwards to lift up the lug-
gage mat.
Make sure that the 12-volt battery ter-
minals are not corroded and that there
are no loose connections, cracks, or
loose clamps.
Terminals
Hold-down clamp
The meanings of each caution symbol
on the top of the 12-volt battery are as
follows:
WARNING
■How to recharge the 12-volt battery
Recharge at a current of 5 A or less and
make sure that the recharging period does not exceed a total of 12 hours.
■Emergency measures regarding electrolyte
●If electrolyte gets in your eyesFlush your eyes with clean water for at
least 15 minutes and get immediate medical attention. If possible, continue to apply water with a sponge or cloth
while traveling to the nearest medical facility.
●If electrolyte gets on your skinWash the affected area thoroughly. If
you feel pain or burning, get medical attention immediately.
●If electrolyte gets on your clothesIt can soak through clothing on to your
skin. Immediately take off the clothing and follow the procedure above if nec-essary.
●If you accidentally swallow electrolyte
Drink a large quantity of water or milk. Get emergency medical attention immediately.
NOTICE
■When recharging the 12-volt battery
Never recharge the 12-volt battery while the engine is running . Also, be sure all accessories
are turned off.
Removing the 12-volt battery
cover
Exterior
Caution symbols
No smoking, no naked
flames, no sparks
Shield eyes
A
B

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6-3. Do-it-yourself maintenance
Maintenance and care
Check that the level is upper than the
center between the bottom of the bat-
tery lid and “LOWER LEVEL” line.
Bottom of the battery lid
“LOWER LEVEL” line
Center of and
If the fluid level is below , replace the
12-volt battery.
Check if the treadwear indicators are
showing on the tires. Also check the
tires for uneven wear, such as excessive
wear on one side of the tread.
New tread
Worn tread
Treadwear indicator
The location of treadwear indicators is
shown by a “TWI” or “ ” mark, etc.,
molded into the sidewall of each tire.
Replace the tires if the treadwear indica-
tors are showing on a tire.
Keep away from children
12-volt battery acid
Note operating instructions
Explosive gas
Checking the 12-volt battery
fluid
A
B
CAB
C
Tires
Replace or rotate tires in accor-
dance with maintenance schedules
and treadwear.
Checking tires
A
B
C

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6-3. Do-it-yourself maintenance
Maintenance and care
■If the electronic key battery is depleted
The following symptoms may occur:
●The smart entry & start system and wire- less remote control will not function properly.
●The operational range will be reduced.
Prepare the following before replacing
the battery:
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2032
■Use a CR2032 lithium battery
●Batteries can be purchased at any autho-
rized Lexus retailer or Lexus authorized repairer, or any reliable repairer, local electrical appliance shops or camera
stores.
●Replace only with the same or equivalent
type recommended by the manufacturer.
●Dispose of used batteries according to
the local laws.
1 Take out the mechanical key.
2 Remove the cover.
To prevent damage to the key, wrap the tip
of the screwdriver with tape.
3 Remove the depleted battery.
Insert a new battery with the “+” terminal
facing up.
Electronic key battery
Replace the battery with a new one
if it is depleted.
Items to prepare
Replacing the battery

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6-3. Do-it-yourself maintenance
1Turn the engine switch switch> off.
2 Open the fuse box cover.
Engine compartment: type A fuse
box (LC500)
Left-hand drive vehicles:
Push the tab in and lift the lid off.
Right-hand drive vehicles:
Push the tab in and lift the lid off.
WARNING
■Removed battery and other parts
These parts are small and if swallowed by
a child, they can cause choking. Keep away from children. Failure to do so could result in death or serious injury.
■Certification for the electronic key
battery
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS
NOTICE
■When replacing the battery
Use a screwdriver of appropriate size. Applying excessive force may deform or
damage the cover.
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
●Always work with dry hands.Moisture may cause the battery to rust.
●Do not touch or move any other com-
ponent inside the remote control.
●Do not bend either of the battery ter- minals.
Checking and replacing
fuses
If any of the electrical components
do not operate, a fuse may have
blown. If this happens, check and
replace the fuses as necessary.
Checking and replacing fuses

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7
When trouble arises
When trouble arises
7-1. Essential information
Emergency flashers ................. 360
If your vehicle has to be stopped in
an emergency.......................... 360
7-2. Steps to take in an emergency
If your vehicle needs to be towed
........................................................ 362
If you think something is wrong
........................................................ 366
Fuel pump shut off system
(LC500) ................................... 367
If a warning light turns on or a
warning buzzer sounds ....... 368
If a warning message is displayed
........................................................ 378
If you have a flat tire.................. 384
If the engine will not start
(LC500) ................................... 385
If the hybrid system will not start
(LC500h) ................................. 386
If you lose your keys ................. 388
If the fuel filler door cannot be
opened ....................................... 388
If the electronic key does not
operate properly .................... 389
If the 12-volt battery is discharged
........................................................ 392
If your vehicle overheats
(LC500) ................................... 400
If your vehicle overheats
(LC500h) ................................. 403
If the vehicle becomes stuck 407

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7-1. Essential information
7-1.Essential information
Press the switch to flash all of the turn
signal lights.
To turn them off, press the switch once
again.
■Emergency flashers
LC500: If the emergency flashers are used
for a long time while the engine is not run- ning, the 12-volt battery may discharge.
LC500h: If the emergency flashers are used for a long time while the hybrid system is not operating (while the “READY” indica-
tor is not illuminated), the 12-volt battery may discharge.
1 Steadily step on the brake pedal
with both feet and firmly depress it.
Do not pump the brake pedal repeatedly
as this will increase the effort required to slow the vehicle.
2 Shift the shift position to N.
If the shift position is shifted to N
3 After slowing down, stop the vehi-
cle in a safe place by the road.
4 Stop the engine .
If the shift position cannot be shifted
to N
3 Keep depressing the brake pedal
with both feet to reduce vehicle
speed as much as possible.
4 To stop the engine ,
press and hold the engine switch
for 2 consecutive
Emergency flashers
The emergency flashers are used to
warn other drivers when the vehicle
has to be stopped in the road due to
a breakdown, etc.
Operating instructions
If your vehicl e has to be
stopped in an emergency
Only in an emergency, such as if it
becomes impossible to stop the
vehicle in the normal way, stop the
vehicle using the following proce-
dure:
Stopping the vehicle

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7-2. Steps to take in an emergency
When trouble arisesIn the following situations, it is not pos-
sible to be towed by another vehicle
using cables or chains, as the rear
wheels may be locked due to the park-
ing lock. Contact any authorized Lexus
retailer or Lexus authorized repairer,
or any reliable repairer or commercial
towing service.
 There is a malfunction in the shift
control system. ( P.166, 170, 381)
 There is a malfunction in the engine
immobilizer system system>. ( P.70)
 There is a malfunction in the smart
entry & start system. ( P.389)
 The 12-volt battery is discharged.
( P.392)
The following may indicate a problem
with your transmission. Contact any
authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer or commercial towing service
before towing.
 LC500: The engine is running but
the vehicle does not move.
 LC500h: The hybrid system warn-
ing message is shown on the multi-
information display and the vehicle
does not move.
 The vehicle makes an abnormal
sound.
Do not tow with a sling-type truck to
prevent body damage.
NOTICE
■To prevent damage to the vehicle when towing using a wheel-lift type truck
●Do not tow the vehicle from the rear
when the engine switch is off. The steering lock mecha-nism is not strong enough to hold the
front wheels straight.
●When raising the vehicle, ensure ade- quate ground clearance for towing at the opposite end of the raised vehicle.
Without adequate clearance, the vehi- cle could be damaged while being towed.
■To prevent damage to the vehicle
when towing with a sling-type truck
Do not tow with a sling-type truck, either from the front or rear.
■To prevent damage to the vehicle during emergency towing
Do not secure cables or chains to the
suspension components.
Situations when it is not possible
to be towed by another vehicle
Situations when it is necessary to
contact dealers before towing
Towing with a sling-type truck

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7-2. Steps to take in an emergency
When trouble arises
■High coolant temperature warning light (warning buzzer)*
*: This light illuminates on the multi-information display.
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on a front passenger seat, the front passenger detection sensor may cause the warning light to flash and the warning buzzer to sound even if a passenger is not
sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the warning
light may not operate properly.
■If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp w ill come on if the fuel tank becomes completely empty. If
the fuel tank is empty, refuel the vehicle immediately. The malfunction indicator lamp will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer as soon as possible.
■Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage temporarily drops, the electric power steering system warning lig ht may come on and the warning buzzer may sound.
■Tire pressure warning light
When a malfunction occurs in the tire pressure warning system, the tire pressure warning light blinks to warn the driver. However, if the warning light blinks for 1 minute, and then
remains illuminated, maki ng it difficult to determine whether the warning light is blinking, turn the engine switch fr om off to IGNITION ON mode and check if the warning light blinks.
■When the tire pressure warning light comes on
Carry out the following procedure after the tire temperature has lowered sufficiently.
●Check the tire inflation pressure and adjust to the appropriate level.
●If the warning light does not go out even after several minutes, check that the tire inflation
pressure is at the specified level and carry out initialization. ( P.335)
The warning light may come on again if the above operations are conducted without first
allowing the tire temperature to lower sufficiently.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on du e to natural causes such as natural air leaks
and tire inflation pressure changes caused by temperature. In this case, adjusting the tire inflation pressure will turn off the warning light (after a few minutes).
Warning
lightWarning light/Details/Actions
Indicates that the engine coolant temperature increases
 Stop and check. (P.400, 403)

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7-2. Steps to take in an emergency
The ABS warning light comes on. ( P.369)
●Malfunction in the charging system
The charging system warning light comes on. ( P.368)
●Malfunction in the brake system
The brake system warning light comes on. ( P.368)
●Malfunction in the tire pressure warning system
The tire pressure warning light comes on. ( P.374)
●Remaining fuel level is low
The low fuel level warn ing light comes on. (P.373)
■If “Hybrid System Overheated Reduced Output Power” is shown (LC500h)
This message may be displayed when driving un der severe operating conditions. (For exam- ple, when driving up a long steep hill.) Stop and check. (P.403)
■If “Traction Battery Needs to be Protected Refrain from the Use of N Position” is shown
(LC500h)
The remaining charge for the hybrid battery (tr action battery) is low. As the hybrid battery
(traction battery) cannot be charged when the sh ift position is in N, when stopping the vehi- cle for a long period of time, shift the shift position to P.
■If “Traction Battery needs to be Protected Shift into P to Restart” is shown (LC500h)
The remaining charge for the hybrid battery (tr action battery) is low, because the shift posi- tion has been shifted to N for a long period of time. When moving the vehicle, shift the shift position to P and restart the hybrid system.
■If “Shift to P Before Exiting Vehicle” is shown
The driver’s door is opened without turning the engine switch to off with the
shift position in any position other than P. Shift the shift position to P.
■If “Shift Is in N Release Accele rator Before Shifting” is shown
The accelerator pedal has been depressed when the shift position is in N. Release the accel-
erator pedal and shift the shift position to D or R.
■If “Depress Brake when Vehicle Is Stoppe d Hybrid System May Overheat” is shown (LC500h)
The message may be displayed when the accelerator pedal is depressed to hold the vehicle while the vehicle is stopped on an uphill etc. The hybrid system may overheat. Release the accelerator pedal and depress the brake pedal.
■If “Shift system malfunction Driving unavailable” is shown
There is a malfunction in the shift control system. Have the vehicle inspected by any autho- rized Lexus retailer or Lexus authorized repa irer, or any reliable repairer immediately.
■If “Auto Power Off to Conserve Battery” is shown
LC500: Power was turned off due to the automatic power off function. Next time when starting the
engine, increase the engine speed slightly an d maintain that level for approximately 5 min- utes to recharge the 12-volt battery.
LC500h: