2021 LEXUS LS500 sat nav

2074-5. Using the driving support systems
4
Driving
■If a warning message is displayed on the multi-information display
A system may be temporarily unavailable or there may be a malfunction in the system.
●In the following situations, perform the actions specified in the table. When the normal
operating conditions are detected, the message will disappear and the system will
become operational.
If the message does not disappea r, contact your Lexus dealer.
SituationActions
When the area around a sensor is covered
with dirt, moisture (fogged up, covered with
condensation, ice, etc.), or other foreign
matterTo clean the part of the windshield in front of
the front camera , use the windshield wipers
or the windshield defo gger of the air condi-
tioning system ( P.324).

2134-5. Using the driving support systems
4
Driving
■If a warning message is displayed on the multi-information display
A system may be temporarily unavailable or there may be a malfunction in the system.
●In the following situations, perform the actions specified in the table. When the normal
operating conditions are detected, the message will disappear and the system will
become operational.
If the message does not disappea r, contact your Lexus dealer.
SituationActions
When the area around a sensor is covered
with dirt, moisture (fogged up, covered with
condensation, ice, etc.), or other foreign
matterTo clean the part of the windshield in front of
the front camera , use the windshield wipers
or the windshield defo gger of the air condi-
tioning system ( P.324).

2504-5. Using the driving support systems
Depending on the vehicle and road condi-
tions, the warning may not operate.
■LTA (Lane Tracing Assist) warning mes-
sages
If the following warning message is dis-
played on the multi-information display and
the LTA indicator illumin ates in orange, fol-
low the appropriate troubleshooting proce-
dure. Also, if a different warning message is
displayed, follow the instructions displayed
on the screen.
●“LTA Malfunction Visit Your Dealer”
The system may not be operating properly.
Have the vehicle inspected by your Lexus
dealer.
●“LTA Unavailable”
The system is temporarily canceled due to
a malfunction in a se nsor other than the
front camera. Turn the LTA system off, wait
for a little while, and then turn the LTA sys-
tem back on.
●“LTA Unavailable at Current Speed”
The function cannot be used as the vehicle
speed exceeds the LTA operation range.
Drive slower.
■Lane change assist function warning
messages
If the following warning message is dis-
played on the multi-information display, fol-
low the appropriate troubleshooting
procedure. Also, if a different warning mes-
sage is displayed, follo w the instructions dis-
played on the screen.
●“Lane Change Assist Malfunction Visit
Your Dealer”
The system may not be operating properly.
Have the vehicle inspected by your Lexus
dealer.
●“Lane Change Assist Unavailable See Owner’s Manual”
The system is temporarily canceled due to
a malfunction in a sensor other than the
front camera. Turn the LTA system off, wait
for a little while, and then turn the LTA sys-
tem back on.
●“Unavailable Activation Condition not
Satisfied See Owner’s Manual”
The function cannot be used as the operat-
ing conditions have not been met.
(  P.246) Operate the turn signal lever
again after all of the operating conditions
are met.
●“Unavailable at Current Speed”
The lane change assist function cannot be
used as the vehicle speed is outside of the
operable range. Operate the turn signal
lever again while drivin g at a vehicle speed
within the operable range. ( P.246)
●“Unavailable Surrounding Vehicle
Detected”
The function cannot be used as a vehicle
was detected in the lane toward which the
turn signal was operated. Operate the turn
signal lever again after checking that there
are no other vehicles nearby.
■Customization
Function settings can be changed. (Cus-
tomizable features: P.476)

4507-2. Steps to take in an emergency
radiator core (radiator) for any
leaks.
Radiators
Cooling fan
If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.
4The coolant level is satisfactory if it
is between the “F” and “L” lines on
the reservoir.
Engine
Reservoir
“F” line
“L” line
Coolant inlet cap
IntercoolerReservoir
“F” line
“L” line
5 Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
Engine
P.451
Intercooler
Remove the engine compartment cover
and add coolant.
A
B
A
B
C
D
A
B
C