2019 LEXUS LS500 engine

405
LS500_OM_(U)_1810 7 7
When trouble arises When trouble arises .
7-1. Essential information
Emergency flashers.................. 406
If your vehicle has to be stopped in
an emergency .......................... 406
If the vehicle is trapped in rising
water............................................ 407
7-2. Steps to take in an emergency
If your vehicle needs to be towed
........................................................ 409
If you think something is wrong
......................................................... 413
Fuel pump shut off system ...... 414
If a warning light turns on or a
warning buzzer sounds ........ 415
If a warning message is displayed
........................................................ 425
If you have a flat tire.................. 429
If the engine wi ll not start ....... 430
If you lose your keys ................. 432
If the fuel filler door cannot be
opened........................................ 432
If the electronic key does not
operate properly .................... 433
If the vehicle battery is discharged
........................................................ 435
If your vehicle overheats ........ 440
If the vehicle becomes stuck
........................................................ 443

406 7-1. Essential information
LS500_OM_(U)_1810 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●
If the emergency flashers are used for a
long time while the engine is not running,
the battery may discharge.●
If any of the SRS airbags deploy (inflate)
or in the event of a strong rear impact, the
emergency flashers will turn on automati-
cally.
The emergency flashers will turn off auto-
matically after operating for approxi-
mately 20 minutes. To manually turn the
emergency flashers off, press the switch
twice.
(The emergency flashers may not turn on
automatically depending on the force of
the impact and conditions of the colli-
sion.) 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 on the road due
to a breakdown, etc.
Operating instructions If your vehicle 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

4077-1. Essential information
LS500_OM_(U)_1810 7
When trouble arises seconds or more, or press it briefly
3 times or more in succession.
5 Stop the vehicle in a safe place by
the road.  Remove the seat belt first.
 If the door can be opened, open the
door and exit the vehicle.
 If the door can not be opened, open
the window using the power window
switch and exit the vehicle through
the window.
 If the window can not be opened
using the power window switch,
remain calm, wait until the water
level inside the vehicle rises to the
point that the water pressure inside
of the vehicle equals the water pres-
sure outside of the vehicle, and then
open the door and exit the vehicle.WARNING■
If the engine has to be turned off while
driving
Power assist for the steering wheel will
be lost, making th e steering wheel
heavier to turn. Decelerate as much as
possible before turning off the engine. If the vehicle is trapped in
rising water In the event the vehicle is sub-
merged in water, remain calm and
perform the following.

4097-2. Steps to take in an emergency
LS500_OM_(U)_1810 7
When trouble arises 7-2.Steps to take in an emergency
If your vehicle needs to be
towed If towing is ne cessary, we recom-
mend having your vehicle towed by
your Lexus dealer or commercial
towing service, using a wheel-lift
type truck or flatbed truck.
Use a safety chain system for all
towing, and abide by all state/pro-
vincial and local laws. WARNING
Observe the following precautions.
Failure to do so may result in death or
serious injury. ■
When towing the vehicle 
2WD models
Be sure to transport the vehicle with all
four wheels raised off the ground. If the
vehicle is towed with the tires contacting
the ground, the driv etrain and related
parts may be damaged or an accident
may occur due to a change in direction
of the vehicle. 
AWD models
Be sure to transport the vehicle with all
four wheels raised off the ground. If the
vehicle is towed with the tires contacting
the ground, the driv etrain or related
parts may be damaged, the vehicle may
fly off the truck.
■
While towing ●
When towing using cables or chains,
avoid sudden starts, etc. which place
excessive stress on the towing eyelets,
cables or chains. The towing eyelets,
cables or chains may become dam-
aged, broken debris may hit people,
and cause serious damage.
●
Make sure to disable all functions of
the vehicle height control of the elec-
tronically modulated air suspension.
Otherwise, the vehicle height may
change and part of your body may be
caught under the vehicle, possibly
causing injury. (  P.293)
●
Do not turn the engine switch off.
This may lead to an accident as the
rear wheels will be locked by the park-
ing lock.
Also, there is a possibility that the
steering wheel is locked and cannot be
operated.

410 7-2. Steps to take in an emergency
LS500_OM_(U)_1810 In 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 your Lexus dealer or
commercial towing service.
 There is a malfunction in the shift control system. (  P.167, 425)
 There is a malfunction in the engine
immobilizer system. (  P.63)
 There is a malfunction in the smart
access system with push-button
start. (  P.433)
 The battery is discharged.
(  P.435)
The following may indicate a problem
with your transmission. Contact your
Lexus dealer or commercial towing
service before towing.
 The engine is running but the vehi-
cle does not move.
 The vehicle makes an abnormal
sound.
Do not tow with a sling-type truck to
prevent body damage.WARNING■
Installing towing eyelets to the vehi-
cle
Make sure that towing eyelets are
installed securely.
If not securely installed, towing eyelets
may come loose during towing.
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 mechanism 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

412 7-2. Steps to take in an emergency
LS500_OM_(U)_1810 wheels, drive train, axles, steering and
brakes must be in good condition.
To have your vehicle towed by another
vehicle, the towing eyelet must be
installed to your vehicle. Install the tow-
ing eyelet using the following proce-
dure.
1 Take out the phillips-head screw-
driver and towing eyelet.
Phillips-head screwdriver
Towing eyelet
2 Remove the eyelet cover using a
flathead screwdriver.To protect the bodywork, place a rag
between the screwdriver and the vehicle
body as shown in the illustration. 3 Insert the towing eyelet into the
hole and tighten partially by hand.
4 Tighten down the towing eyelet
securely using a phillips-head
screwdriver or hard metal bar.
5 Securely attach cables or chains to
the towing eyelet. Take care not to damage the vehicle body.
6 Enter the vehicle being towed and
start the engine. If the engine does not start, turn the engine
switch to IGNITION ON mode.
7 Shift the shift position to N and
release the parking brake. ■
While towing
If the engine is not running, the power assist
for the brakes and steering will not function,
making steering and braking more difficult.Emergency towing procedure
A
B

4137-2. Steps to take in an emergency
LS500_OM_(U)_1810 7
When trouble arises  Fluid leaks under the vehicle.
(Water dripping from the air condi-
tioning after use is normal.)
 Flat-looking tires or uneven tire
wear
 Engine coolant temperature gauge
needle continually points higher
than normal.
 Changes in exhaust sound
 Excessive tire squeal when corner-
ing
 Strange noises related to the sus-
pension system
 Pinging or other noises related to
the engine
 Engine missing, stumbling or run-
ning roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side
when braking  Vehicle pulls heavily to one side
when driving on a level road
 Loss of brake effectiveness, spongy
feeling, pedal almost touches the
floor
If you think something is
wrong If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms

414 7-2. Steps to take in an emergency
LS500_OM_(U)_1810 Follow the procedure below to restart
the engine after the system is activated.
1 Turn the engine switch to ACCES-
SORY mode or turn it off.
2 Restart the engine.Fuel pump shut off system To minimize the risk of fuel leakage
when the engine stalls or when an
airbag inflates upon collision, the
fuel pump shut off system stops the
supply of fuel to the engine.
Restarting the engine
NOTICE■
Before starting the engine
Inspect the ground under the vehicle.
If you find that fuel has leaked onto the
ground, the fuel system has been dam-
aged and is in need of repair. Do not
restart the engine.