ignition LEXUS LS500H 2020 Repair Manual

4407-2. Steps to take in an emergency
4Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the battery of your vehi-
cle.
5 Open and close any of the doors of
your vehicle with the engine switch
off.
6 Maintain the engine speed of the
second vehicle and start the engine
of your vehicle by turning the
engine switch to IGNITION ON
mode.
7 Once the vehicle’s engine has
started, remove the jumper cables
in the exact reverse order from
which they were connected.
Method connecting jumper (or
booster) cables to the exclusive
jump starting terminal
1 Confirm that the electronic key is
being carried.
When connecting the jumper (or booster)
cables, depending on the situation, the
alarm may activate and doors locked. (
 P.66)
2 Open the hood. Remove the ser-
vice cover. ( P.375, 379)
3 Open the fuse box cover.
Push the tab in and lift the lid off.
4Open the exclusive jump starting
terminal cover.
5 Remove the engine cover.
(P.378)
6 Connect a positive jumper cable clamp to on your vehicle and connect the
clamp on the other end of the positive cab le to on the second vehicle. Then,
A
B

4417-2. Steps to take in an emergency
7
When trouble arises
connect a negative cable clamp to on the second vehicle and connect the
clamp at the other end of the negative cable to .
Exclusive jump starting terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Solid, stationary, unpainted metallic point away from the exclusive jump starting
terminal and any mo ving parts as shown in the illustration
7 Start the engine of the second vehi-
cle. Increase the engine speed
slightly and maintain at that level for
approximately 5 minutes to
recharge the battery of your vehi-
cle.
8 Open and close any of the doors of
your vehicle with the engine switch
off.
9 Maintain the engine speed of the
second vehicle and start the engine
of your vehicle by turning the
engine switch to IGNITION ON
mode.
10 Once the vehicle’s engine has
started, remove the jumper cables
in the exact reverse order from
which they were connected. 11
Close the exclusive jump starting
terminal cover, and reinstall the fuse
box cover to its original position.
12 Install the service cover. ( P.379)
13 Install the engine cover. ( P.379)
Once the engine starts, have the vehi-
cle inspected at your Lexus dealer as
soon as possible.
■Starting the engine when the battery is
discharged
The engine cannot be started by push-start-
ing.
■To prevent battery discharge
●Turn off the headlights and the audio sys-
tem while the engine is off.
●Turn off any unnecessary electrical com-
ponents when the vehicle is running at a
low speed for an extended period, such
C
D
A
B
C
D

4538-1. Specifications
8
Vehicle specifications
containers to help you select the oil you
should use.
Cooling system
Capacity (Reference)
Engine
2WD models: 11.2 qt. (10.6 L, 9.3 Imp. qt.)
AWD models: 11.1 qt. (10.5 L, 9.2 Imp. qt.)
Intercooler
4.5 qt. (4.3 L, 3.8 Imp. qt.)
Coolant type
Use either of the following:
 “Toyota Super Long Life Coolant”
 Similar high-quality ethylene glycol-based non-silicate,
non-amine, non-nitrite, and non-borate coolant with
long-life hybrid organic acid technology
Do not use plain water alone.
Ignition system (spark plug)
MakeDENSO EC22HPR-D7
Gap0.028 in. (0.7 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

496What to do if... (Troubleshooting)
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
If you lose your mechanical keys,
new genuine mechanical keys can
be made by your Lexus dealer.
( P.436)
 If you lose your electronic keys, the
risk of vehicle theft increases signifi-
cantly. Contact your Lexus dealer
immediately. ( P.436)
 Is the electronic key battery weak or
depleted? ( P.403)
 Is the engine switch in IGNITION
ON mode?
When locking the doors, turn the engine
switch off. ( P.168)
 Is the electronic key left inside the
vehicle?
When locking the doors, make sure that
you have the electronic key on your per-
son.
The function may not operate prop-
erly due to the condition of the radio
wave. ( P.113)
 Is the child-protector lock set?
The rear door cannot be opened from
inside the vehicle when the lock is set.
Open the rear door from outside and then
unlock the child-protector lock. ( P.103)
 The function to prevent the elec-
tronic key from being left inside the
trunk will operate and you can open
the trunk as usual. Take the key out
from the trunk. ( P.109)
 Did you press the engine switch
while firmly depressing the brake
pedal? ( P.165)
 Is the electronic key anywhere
detectable inside the vehicle?
( P.112)
 Is the steering wheel unlocked?
( P.165)
 Is the electronic key battery weak or
depleted?
If you have a problem, check the
following before contacting your
Lexus dealer.
The doors cannot be locked,
unlocked, opened or closed
You lose your keys
The electronic key does not
operate properly
The doors cannot be locked or
unlocked
The rear door cannot be opened
The trunk lid is closed with the
electronic key left inside
If you think something is wrong
The engine does not start

497What to do if... (Troubleshooting)
In this case, the engine can be started in a
temporary way. (P.438)
Is the battery discharged?
( P.439)
 It is locked automatically to prevent
theft of the vehicle. ( P.165)
 Is the window lock switch pressed?
The power window except for the one at
the driver’s seat cannot be operated if the
window lock switch is pressed. ( P.145)
 The auto power off function will be
operated if the vehicle is left in
ACCESSORY mode for a period of
time. ( P.168)
 The seat belt reminder light is flash-
ing
Are the driver and the front passenger
wearing the seat belts? ( P.422)
 The parking brake indicator is on
Is the parking brake released? ( P.176)
Depending on the situation, other
types of warning buzzer may also sound. (
P.419, 429)
 Did anyone inside the vehicle open
a door during setting the alarm?
The sensor detects it and the alarm sounds.
( P.65)
Do one of the following to deactivate
or stop the alarms:
 Unlock the doors.
 Turn the engine switch to ACCES-
SORY or IGNITION ON mode, or
start the engine. (The alarm will be
deactivated or stopped after a few
seconds.)
 Is the message displayed on the
multi-information display?
Check the message on the multi-informa-
tion display. ( P.429)
 When a warning light turns on or a
warning message is displayed, refer
to P.419, 429.
The steering wheel cannot be
turned after the engine is
stopped
The windows do not open or
close by operating the power
window switches
The engine switch is turned off
automatically
A warning buzzer sounds during
driving
An alarm is activated and the
horn sounds
A warning buzzer sounds when
leaving the vehicle
A warning light turns on or a
warning message is displayed
When a problem has occurred
If you have a flat tire

502Alphabetical Index
If a warning message is displayed..... 429
If the battery is discharged .................... 439
If the electronic key does not operate properly....................................................... 437
If the engine will not start ....................... 434
If the fuel filler door cannot be opened ......................................................................... 436
If the vehicle is trapped in rising water411
If you have a flat tire .................................. 433
If you lose your keys................................. 436
If you think something is wrong ........... 417
If your vehicle becomes stuck............. 447
If your vehicle has to be stopped in an
emergency ................................................. 410
If your vehicle needs to be towed ....... 413
If your vehicle overheats ........................ 444
Engine ACCESSORY mode .............................. 168
Compartment ..............................................377
Engine compartment cover ................. 378
Engine switch................................................ 165
Fuel pump shut off system ..................... 418
Hood................................................................ 375
How to start the engine........................... 165
Identification number .................................451
If the engine will not start ....................... 434
If your vehicle has to be stopped in an
emergency ................................................. 410
Ignition switch (engine switch) ............ 165
Overheating................................................. 444
Tachometer ............................................. 73, 76
Engine compartment cover .................... 378
Engine coolant Capacity ......................................................... 453
Checking ....................................................... 382
Preparing and checking before winter.........................................................................303
Engine coolant temperature gauge 73, 76
Engine immobilizer system ........................ 63
Engine oil Capacity ......................................................... 452
Checking ...................................................... 380 Preparing and checking before winter
......................................................................... 303
Warning light ...............................................420
Engine oil maintenance data ................... 381
Engine switch ..................................................165 Auto power off function........................... 168
Changing the engine switch modes . 168
If your vehicle has to be stopped in an emergency .................................................. 410
EPS (Electric Power Steering) .............. 298 Warning light ............................................... 422
Event data recorder (E DR) ............................7
F
FCTA (Front Cross Traffic Alert) ......... 223
First-aid kit storage belt ............................ 344
Flat tire
Tire pressure warning system ............ 389
Floor mats ...........................................................22
Fluid Automatic transmission ..........................454
Brake ............................................................... 455
Washer .......................................................... 384
Footwell light ................................................. 334
Front automatic air conditioning system ............................................................................ 317
Front Cross Traffic Alert (FCTA) ......... 223
Front passenger occupant classification system .............................................................. 39
Front seats Adjustment ....................................................... 119
Cleaning ........................................................ 365
Correct driving posture ............................ 23
Driving position memory ........................ 130
Head restraints............................................. 135
Memory recall function............................ 133
Power easy access system .................... 130
Refresh system ..............................................124
Seat heaters ................................................. 330
Seat position memory .............................. 130
Seat ventilators ........................................... 330

503Alphabetical Index
Front side marker lightLight switch .................................................... 180
Replacing light bulbs............................... 408
Front turn signal lights Replacing light bulbs............................... 408
Turn signal lever ........................................... 175
Fuel Capacity ...........................................................451
Fuel gauge ............................................... 73, 76
Fuel pump shut off system ..................... 418
Information ....................................................459
Refueling ......................................................... 190
Type....................................................................451
Warning light ............................................... 422
Fuel consumption Average fuel economy .............................. 82
Current fuel consumption........................ 82
Fuel filler door If the fuel filler door cannot be opened......................................................................... 436
Refueling ......................................................... 190
Fuel gauge ..................................................73, 76
Fuel pump shut off system......................... 418
Fuses ................................................................. 405
G
Garage door opener ................................. 354
Gauges ........................................................73, 76
Gear Position................................................... 84
G-force............................................................... 84
Glove box ....................................................... 339
Glove box light ............................................. 340
H
Hands Free Power Trunk Lid ...................107
Head restraints ...............................................135
Headlights Adaptive Front-lighting System (AFS)...........................................................................182
Automatic High Beam system............. 183
Light switch .................................................... 180 Replacing light bulbs ............................... 408
Head-up display.............................................. 87 Driving information display area ........... 87
Driving support system display area ..90
Eco Driving Indicator....................................91
HUD (Head-up display) switch ............89
Navigation system-linked display ........ 87
Pop-up display ...............................................90
Settings...............................................................89
Heated steering wheel .............................. 330
Heaters Front automatic air conditioning system............................................................................317
Heated steering wheel ........................... 330
Outside rear view mirrors...................... 318
Rear automatic air conditioning system
.......................................................................... 327
Seat heaters ................................................. 330
Height control Electronically modulated air suspension..........................................................................295
Hill-start assist control ............................... 298
Hood Open................................................................375
Pop Up Hood................................................. 37
Hooks Coat hooks ................................................... 347
Retaining hooks (floor mat) ..................... 22
Horn ....................................................................139
HUD (Head-up display) switch ................ 89
I
I/M test ............................................................ 372
Identification Engine............................................................... 451
Vehicle ........................................................... 450
Ignition switch (engine switch).................165 Auto power off function........................... 168
Changing the engine switch modes . 168
If your vehicle has to be stopped in an emergency .................................................. 410
Indicators ........................................................... 70

509Alphabetical Index
Driving mode select switch .................. 292
Driving position memory switches .... 130
Dynamic radar cruise control with full-speed range switch ......................... 241
Electronic roof sunshade switches .... 148
Emergency flashers switch .................... 410
Engine switch................................................ 165
Garage door opener switches .......... 354
Heated steering wheel switch.............330
HUD (Head-up display) switch............ 89
Ignition switch............................................... 165
Instrument panel light control switches ....................................................................75, 79
Intuitive parking assist switch...............260
Light switches ............................................... 180
LTA (Lane Tracing As sist) switch..... 232
Meter control switches ................................81
Moon roof switches ...................................146
“ODO TRIP” switch ............................ 74, 79
Outside rear view mirror switches .......141
Paddle shift switches ........................ 173, 174
Panoramic moon roof switches .......... 148
Parking brake switch ................................. 176
PCS OFF switch ............................. 208, 218
PKSB (Parking Support Brake) switch ......................................................................... 274
Power door lock switch ...........................102
Power window switches ..........................143
RCD (Rear Camera Detection) switch ......................................................................... 270
RCTA switch................................................ 266
Rear door sunshade switch................. 350
Rear seat heater ......................................... 328
Rear seat position memory switches. 134
Rear seat ventilator ................................... 328
Rear sunshades switch ........................... 352
Rear window and outside rear view mir- ror defoggers switch .............................. 317
Seat heater switches ................................330
Seat ventilator switches ..........................330
Snow mode switch ..................................... 172
“SOS” button .................................................. 58 Tilt and telescopic steering control switch
........................................................................... 139
Tire pressure warning reset switch...392
Trunk closer switch ....................................108
Trunk opener main switch........................ 110
Trunk opener switch ................................. 106
Vehicle-to-vehicle distance switch.....241
VSC OFF switch .......................................299
Window lock switch.................................. 145
Windshield wiper and washer switch185
Windshield wiper de-icer switch....... 322
T
Tachometer................................................73, 76 Rev indicator ................................................... 78
Rev peak............................................................ 78
Tail lights Light switch ....................................................180
Replacing light bulbs ............................... 408
Theft deterrent system Alarm...................................................................65
Engine immobilizer system...................... 63
Tire inflation pressure Maintenance data ..................................... 456
Tire inflation pressure display function......................................................................... 389
Warning light ............................................... 423
Tire information ..............................................461 Glossary .........................................................464
Size .................................................................... 462
Tire identification number...................... 462
Uniform Tire Quality Grading ............463
Tire pressure display ... ............................... 389
Tire pressure warning system Function ......................................................... 389
Initializing........................................................392
Installing tire pres sure warning valves
and transmitters........................................ 391
Registering ID codes ...............................393
Warning light ............................................... 423
Tires Chains ............................................................ 304