Page 427 of 528

4277-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises ■
Brake system warning light (warning buzzer)
■
Brake system warning light (warning buzzer)
■
High coolant temperature warning light *
(warning buzzer)
*
: This light illuminates on the multi-information display.If a warning light turns on or a warning buzzer soundsCalmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, bu t then goes off, this does not necessar-
ily indicate a malfunction in the system. However, if this continues to occur,
have the vehicle inspected by your Lexus dealer.
Actions to the warning lights or warning buzzers Warning light Details/Actions(U.S.A.)
or (red)
(Canada) Indicates that:
The brake fluid level is low; or
The brake system is malfunctioning
→ Immediately stop the vehicle in a safe place and contact your Lexus
dealer. Continuing to drive the vehicle may be dangerous.
Indicates that the brake pads are worn out (only the right-side pads can
be detected)
→ Have the vehicle inspected by your Lexus dealer.
Warning light Details/Actions
(yellow) Indicates a malfunction in:
The regenerative braking system;
The electronically controlled brake system; or
The parking brake system
→ Have the vehicle inspected by your Lexus dealer immediately.
Warning light Details/Actions
Indicates that the engine coolant temperature is too high
→ Immediately stop the vehicle in a safe place.
Handling method ( → P.453)
Page 428 of 528

428 7-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) ■
Charging system 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. ■
Malfunction indicator lamp (warning buzzer)
■
SRS warning light (warning buzzer) Warning light Details/Actions
Indicates a malfunction in the vehicle’s charging system
→ Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
Warning light Details/Actions
Indicates that the engine oil pressure is too low
→ Immediately stop the vehicle in a safe place and contact your Lexus
dealer.
Warning light Details/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 light Details/Actions
Indicates a malfunction in:
The SRS airbag system;
The front passenger occupant classification system; or
The seat belt pr etensioner system
→ Have the vehicle inspected by your Lexus dealer immediately.
Page 429 of 528

4297-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises ■
Pop Up Hood warning light (warning buzzer)
■
ABS warning light (warning buzzer)
■
Brake Override System warning light/Drive-Start Control warning light *
(warning buzzer)
*
: This light illuminates on the multi-information display. Warning light Details/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 light Details/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.
Warning light Details/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.
Page 431 of 528

4317-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises ■
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 un fastened, the buzzer will sound in
a different tone for 30 more seconds. ■
Tire pressure warning light
■
LTA indicator/LKA indicator (warning buzzer) Warning light Details/Actions
Warns the rear passengers to fasten their seat belts
→ Fasten the seat belt.
Warning light Details/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.435)
Warning light Details/Actions
(orange) Indicates a malfunction in the LTA (Lane Tracing Assist) or LKA
(Lane-Keeping Assist)
→ Follow the instructions displayed on the multi-information display.
( → P.238, 246)
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432 7-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) ■
Intuitive parking assist OFF indicator (warning buzzer)
■
RCTA OFF indicator (warning buzzer)
■
RCD OFF indicator (warning buzzer) Warning light Details/Actions
(flashes) When a buzzer sounds:
Indicates a malfunction in the in tuitive parking assist function
→ 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.268)
Warning light Details/Actions
(flashes) When a buzzer sounds:
Indicates a malfunction in the RCTA (Rear Cross Traffic Alert) function
→ Have the vehicle inspected by your Lexus dealer immediately.
When a buzzer does not sound:
Indicates that the rear bumper around the radar sensor is covered with
dirt, etc. ( → P.261)
→ Follow the instructions displayed on the multi-information display.
( → P.274)
Warning light Details/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.278, 437)
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4337-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises ■
PKSB OFF indicator (warning buzzer)
■
PCS warning light (warning buzzer)
■
Slip indicator Warning light Details/Actions
(flashes) When a buzzer sounds:
Indicates a malfunction in the PK SB (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.284, 437)
Warning light Details/Actions
(flashes or illumi-
nates) Indicates a malfunction in the PCS (Pre-Collision System) or that the
system is temporarily unavailable due to the vehicle being extremely
hot/cold, or dirt around a front sensor, etc.
→ Follow the instructions displayed on the multi-information display.
( → P.219, 226, 440)
If the PCS (Pre-Collision System) or VSC (Vehicle Stability Control)
system is disabled, the PCS warning light will illuminate.
→ P.219, 226
Warning light Details/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.
Page 437 of 528

4377-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises If a warning message is dis-
played The multi-information display
shows warnings of system malfunc-
tions, incorrectly performed opera-
tions, and messages that indicate a
need for maintenance. When a
message is shown, perform the cor-
rection procedure appropriate to
the message.
Except F SPORT models:
Master warning lightThe master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently being displayed on the
multi-information display.
Multi-information displayFollow the instructions of the message
on the multi-information display.
If any of the warning messages are
shown again after the appropriate
actions have been performed, contact
your Lexus dealer.
F SPORT models (main meter in
center position): A
B Master warning light The master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently be ing displayed on the
multi-information display.
Multi-information display Follow the instructions of the message
on the multi-information display.
If any of the warning messages are
shown again after the appropriate
actions have been performed, contact
your Lexus dealer.
F SPORT models (main meter
moved to the right): A
B
Page 438 of 528

438 7-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) The master warning light and warning bu zzers operate as follows depending on
the content of the message. If a message indicates the need for inspection by a
dealer, have the vehicle inspected by your Lexus dealer immediately. Master warning lightThe master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently being displayed on the
multi-information display.
Multi-information displayFollow the instructions of the message
on the multi-information display.
If any of the warning messages are
shown again after the appropriate
actions have been performed, contact
your Lexus dealer. A
B
Messages and warnings
Warning buzzer *
Warning
Comes on Sounds Indicates an important situat ion, such as when a sys-
tem related to driving is ma lfunctioning or that dan-
ger may result if the co rrection procedure is not
performed
Flashes Sounds Indicates a situation, such as when damage to the
vehicle or danger may result