4357-2. Steps to take in an emergency
LS500h_OM_OM50F42U_(U) 7
When trouble arises If 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.442
If none of the tires are punctured:
Turn the power switch off then turn it to ON
mode. Check if the ti re 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.401)
■
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.398
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.
5211-1. What to do if... (Troubleshooting)
LS500h_OM_OM50F42U_(U) 521Alphabetical Index
Speedometer .............................................77, 81
Steering lock
Column lock release..................................169
Steering lock system warning message
...........................................................................169
Steering wheel
Adjustment...................................................... 147
Heated steering wheel............................ 336
Meter control switches .............................. 87
Power easy access system .....................139
Steering wheel position memory ........139
Stop lights
Replacing light bulbs.................................. 417
Storage features .......................................... 343
Stuck
If the vehicle becomes stuck................ 457
Suggestion function......................................... 91
Sun visors ........................................................ 354
Sunshade
Roof ....................................................................154
Switches
Activating the Automatic High Beam
.......................................................................... 188
Automatic High Beam system............. 188
Brake Hold switch ..................................... 183
Door lock switches ...................................... 110
Driving mode select switch ..................298
Driving position memory switches .....139
Dynamic radar cruise control with
full-speed range switch .........................251
Emergency flashers switch ................... 420
EV drive mode switch .............................. 172
Garage door opener switches ......... 358
Heated steering wheel switch............. 336
HUD (Head-up display) switch............ 94
Ignition switch............................................... 168
Instrument panel light control switches
................................................................... 79, 85
Intuitive parking assist switch............... 267
Light switches ............................................... 185
LKA (Lane-Keeping A ssist) switch.. 242
LTA (Lane-Tracing Assist) switch .... 234 Meter control switches .............................. 87
Moon roof switches................................... 153
“ODO TRIP”switch ............................79, 85
Outside rear view mi rror switches .... 149
Paddle shift switches ....................... 178, 179
Parking brake switch................................... 181
PCS OFF switch .............................. 212, 222
PKSB (Parking Support Brake) switch
........................................................................... 281
Power door lock switch ............................ 110
Power switch................................................. 168
Power window switches ........................... 151
RCD (Rear camera detection) switch
.......................................................................... 277
RCTA switch ................................................ 273
Rear door sunshade switch ................. 355
Rear seat heater..........................................334
Rear seat position memory switches .143
Rear seat ventilator ...................................334
Rear sunshades switch........................... 356
Rear window and outside rear view mir-
ror defoggers switch ............................ 323
Seat heater switches.................................336
Seat ventilator switches ..........................336
Snow mode switch...................................... 177
“SOS” button................................................364
Tilt and telescopic steering control switch
............................................................................147
Tire pressure warning reset switch.... 401
Trunk closer switch ...................................... 115
Trunk opener main switch........................ 118
Trunk opener switch ................................... 114
Vehicle-to-vehicle distance switch.... 251
VSC OFF switch ...................................... 304
Window lock switch.................................. 153
Windshield wiper and washer switch190
Windshield wiper de-icer switch....... 327
T
Tachometer.................................................77, 81
Rev indicator ...................................................83
Rev peak............................................................83
