2019 LEXUS LS500H Owners Manual

4257-2. Steps to take in an emergency
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7
When trouble arises
■Hybrid system overheat warning light*(warning buzzer)
*: This light illuminates on the multi-information display.
■Charging system warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
■Low traction battery warning light*(warning buzzer)
*: This light illuminates on the multi-information display.
■Low engine oil pressure warning light* (warning buzzer)
*: This light illuminates on the multi-information display.
Warning lightDetails/Actions
Indicates the hybrid system has overheated
 Stop the vehicle in a safe place.
Handling method ( P.451)
Warning lightDetails/Actions
Indicates a malfunction in the vehicle’s charging system
 Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
Warning lightDetails/Actions
Indicates that the charge of the hy brid battery (traction battery) has
become low due to the shift position being left in N for a long time
 As the hybrid battery (traction ba ttery) cannot be charged with the
N shift position selected, when stopping the vehicle for a long
period of time, shift the shift position to P.
 If the “READY” indicator is not illumi nated, shift the shift position to
P and restart the hybrid system.
Warning lightDetails/Actions
Indicates that the engine oil pressure is too low
 Immediately stop the vehicle in a safe place and contact your Lexus
dealer.

4267-2. Steps to take in an emergency
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■Malfunction indicator lamp (warning buzzer)
■SRS warning light (warning buzzer)
■Pop Up Hood warning light (warning buzzer)
■ABS warning light (warning buzzer)
Warning lightDetails/Actions
(U.S.A.)
or
(Canada)
Indicates a malfunction in:
The hybrid system;
 The electronic engine control system;
 The electronic throttle control system; or
 The electronic hybrid transmission control system
 Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
Warning lightDetails/Actions
Indicates a malfunction in:
 The SRS airbag system;
 The front passenger occupant classification system; or
 The seat belt pretensioner system
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that the Pop Up Hood system has operated
The Pop Up Hood system cannot be reused once it has operated.
Have it replaced by your Lexus dealer.
Indicates a malfunction in the Pop Up Hood system
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
(U.S.A.)
or
(Canada)
Indicates a malfunction in:
The ABS; or
 The brake assist system
 Have the vehicle inspected by your Lexus dealer immediately.

4277-2. Steps to take in an emergency
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7
When trouble arises
■Brake Override System warning light/Drive-Start Control warning light*
(warning buzzer)
*: This light illuminates on the multi-information display.
■Electric power steering system warning light (warning buzzer)
■Low fuel level warning light
■Driver’s and front passenger’s seat belt reminder light (warning buzzer)*
Warning lightDetails/Actions
When a buzzer sounds:
Brake Override System is malfunctioning;
 Drive-Start Control is operating;
 Drive-Start Control is malfunctioning; or
 Parking Support Brake function (for static objects) is operating
 Follow the instructions displayed on the multi-information display.
When a buzzer does not sound:
Brake Override System is operating
 Release the accelerator pedal and depress the brake pedal.
Warning lightDetails/Actions
(red)
or
(yellow)
Indicates a malfunction in the EPS (Electric Power Steering) system
Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
Indicates that remaining fuel is approximately 3.4 gal. (13 L, 2.8 Imp.
gal.) or less
 Refuel the vehicle.
Warning lightDetails/Actions
Warns the driver and/or front pass enger to fasten their seat belts
 Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s seat
belt also needs to be fastened to make the warning light (warning
buzzer) turn off.

4287-2. Steps to take in an emergency
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*: Driver’s seat belt warning buzzer:
The driver’s seat belt warning buzzer sounds to al ert the driver that his or her seat belt is not
fastened. Once the power switch is turned to ON mode, the buzzer sounds for 6 seconds.
If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer sounds once. If the seat belt
is still unfastened after 24 seconds, the buzzer will sound intermittently for 6 seconds. Then,
if the seat belt is st ill unfastened, the buzzer will sound in a different tone for 90 more sec-
onds.
Front passenger’s seat belt warning buzzer:
The front passenger’s seat belt warning buzzer sounds to alert the front passenger that his
or her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of 12
mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will sound
intermittently for 6 seconds. Th en, if the seat belt is still unfastened, the buzzer will sound in
a different tone for 90 more seconds.
■Rear passengers’ seat belt reminder lights*1 (warning buzzer)*2
*1: This light illuminates on the center panel.
*2: Rear passengers’ seat belt warning buzzer:
The rear passengers’ seat belt warning buzzer sounds to alert the rear passengers that his
or her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of 12
mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will sound
intermittently for 6 seconds. Th en, if the seat belt is still unfastened, the buzzer will sound in
a different tone for 30 more seconds.
■Tire pressure warning light
Warning lightDetails/Actions
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.
Warning lightDetails/Actions
When the light comes on after blinking for approximately 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by your Lexus dealer.
When the light comes on:
Low tire inflation pressure such as
 Natural causes
 Flat tire
 Immediately stop the vehicle in a safe place.
Handling method ( P.432)

4297-2. Steps to take in an emergency
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7
When trouble arises
■LTA indicator (warning buzzer)
■Intuitive parking assist OFF indicator (warning buzzer)
■RCTA OFF indicator (warning buzzer)
■RCD OFF indicator (warning buzzer)
Warning lightDetails/Actions
(orange)
Indicates a malfunction in th e LTA (Lane Tracing Assist)
 Follow the instructions displayed on the multi-information display.
(  P.245)
Warning lightDetails/Actions
(flashes)
Indicates a malfunction in the in tuitive parking assist function
 Have the vehicle inspected by your Lexus dealer immediately.
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information display.
(  P.267)
Warning lightDetails/Actions
(flashes)
Indicates a malfunction in the RCTA (Rear Cross Traffic Alert) function
 Have the vehicle inspected by your Lexus dealer immediately.
Indicates that the rear bumper around the radar sensor is covered with
dirt, etc. ( P.259)
 Follow the instructions displayed on the multi-information display.
(  P.272)
Warning lightDetails/Actions
(flashes)
(if equipped)
When a buzzer sounds:
Indicates a malfunction in the RCD (Rear Camera Detection) function
 Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the function temporarily cannot be used due to the cam-
era being dirty, etc.
 Follow the instructions displayed on the multi-information display.
(  P.276, 434)

4307-2. Steps to take in an emergency
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■PKSB OFF indicator (warning buzzer)
■PCS warning light
■Slip indicator
Warning lightDetails/Actions
(flashes)
When a buzzer sounds:
Indicates a malfunction in the PKSB (Parking Support Brake) system
 Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information display.
(  P.282, 434)
Warning lightDetails/Actions
(flashes or illumi-
nates)
When a buzzer sounds simultaneously:
Indicates a malfunction has occurred in the PCS (Pre-Collision System).
 Have the vehicle inspected by your Lexus dealer immediately.
If a buzzer does not sound:
The PCS (Pre-Collision System) has become temporarily unavailable,
corrective action may be necessary.
 Follow the instructions displayed on the multi-information display.
(  P.204, 210, 437)
If the PCS (Pre-Collision System) or VSC (Vehicle Stability Control)
system is disabled, the PCS warning light will illuminate.
 P.222, 230
Warning lightDetails/Actions
Indicates a malfunction in:
The VSC system;
 The TRAC system;
 The hill-start assist control system;
 The VGRS system (if equipped); or
 The DRS system (if equipped)
 Have the vehicle inspected by your Lexus dealer immediately.

4317-2. Steps to take in an emergency
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7
When trouble arises
■Parking brake indicator (warning buzzer)
■Brake hold operated indicator (warning buzzer)
■Master warning light (warning buzzer)
■Warning buzzer
In some cases, the bu zzer may not be heard
due to being in a noisy location or audio
sound.
■Front passenger detection sensor, seat
belt reminder and warning buzzer
●If luggage is placed on the front passen-
ger seat, the front passenger detection
sensor may cause th e 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 sen-
sor may not detect a passenger, and the
warning light may not operate properly.
■SRS warning light
This warning light system monitors the air- bag sensor assembly, Pop Up Hood com-
puter assembly, front impact sensors, side
impact sensors (front door), side impact
sensors (front), side
impact sensors (rear),
driver’s seat position sensor, driver’s seat
belt buckle switch, front passenger occu-
pant classification system (ECU and sen-
sors), rear seat belt buckle switches (if
equipped), “AIR BAG ON” indicator light,
“AIR BAG OFF” indicator light, front pas-
senger’s seat belt buckle switch, seat belt
pretensioners, airbags, interconnecting wir-
ing and power sources. ( P.29)
■If the malfunction indicator lamp comes
on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
Warning lightDetails/Actions
(flashes) (U.S.A.)
or
(flashes)
(Canada)
Indicates a malfunction in the parking brake system
 Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
(flashes)
Indicates a malfunction in the brake hold system
Have the vehicle inspected by your Lexus dealer immediately.
Warning lightDetails/Actions
A buzzer sounds and the warning light comes on and flashes to indicate
that the master warning system has detected a malfunction.
P.434

4327-2. Steps to take in an emergency
LS500h_OM_(U)_1809If it is, tighten it securely.
The light will go off after several driving
trips.
If the light does not go off even after several
trips, contact your Lexus dealer 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 po wer steering system
warning light may come on and the warning
buzzer may sound.
■When the tire pressure warning light
comes on
Inspect the tires to check if a tire is punc-
tured.
If a tire is punctured: P.439
If none of the tires are punctured:
Turn the power switch off then turn it to ON
mode. Check if the tire pressure warning
light comes on or blinks.
If the tire pressure wa rning light blinks for
approximately 1 minute then stays on
There may be a malfunction in the tire
pressure warning syst em. Have the vehicle
inspected by your Lexus dealer immedi-
ately.
If the tire pressure warning light comes
on
1 After the temperature of the tires has
lowered sufficiently, check the inflation
pressure of each tire and adjust them to
the specified level.
2 If the warning light does not turn off
even after several minutes have
elapsed, check that the inflation pres-
sure of each tire is at the specified level
and perform initialization. ( P.398)
■The tire pressure warning light may
come on due to natural causes
The tire pressure wa rning light may come
on due to natural causes such as natural air
leaks and tire inflation pressure changes
caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the
warning light (after a few minutes).
■Conditions that the tire pressure warn-
ing system may not function properly
 P.395
WARNING
■If both the ABS and the brake system
warning lights remain on
Stop your vehicle in a safe place immedi-
ately and contact your Lexus dealer.
The vehicle will become extremely
unstable during br aking, and the ABS
system may fail, which could cause an
accident resulting in death or serious
injury.
■When the electric power steering
system warning light comes on
When the light comes on yellow, the
assist to the power st eering is restricted.
When the light comes on red, the assist
to the power steering is lost and handling
operations of the steering wheel become
extremely heavy.
When steering wheel operations are
heavier than usual, grip the steering
wheel firmly and operate it using more
force than usual.
■If the tire pressure warning light
comes on
Be sure to observe the following precau-
tions.
Failure to do so could cause a loss of
vehicle control and result in death or
serious injury.
●Decelerate to the lowest appropriate
speed as soon as possible. Do not
drive over 50 mph (80 km/h).
●Check and adjust the tire inflation
pressure immediately.
●If the tire pressure warning light comes
on even after tire inflation pressure
adjustment, it is prob able that you have
a flat tire. Have the flat tire replaced by
the nearest Lexus dealer.