Page 761 of 787
759
ES350_300h_OM_OM33B99U_(U)
Index
What to do if... (Troubleshooting)................................ 760
Alphabetical index..................................766
For vehicles with a navigation system, refer to the “NAVIGATION
SYSTEM OWNER’S MANUAL” for information regarding the
equipment listed below.
• Navigation system
• Lexus parking assist monitor
• Audio/video system
• Lexus Enform with Safety Connect
Page 762 of 787

760What to do if... (Troubleshooting)
ES350_300h_OM_OM33B99U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys
can be made by your Lexus dealer. (→P. 125)
●If you lose your electronic keys, the risk of vehicle theft
increases significantly. Contact your Lexus dealer immediately.
(→ P. 1 2 6 )
●Is the electronic key battery weak or depleted? ( →P. 584)
●Is the “START STOP ENGINE” <“POWER”> switch in
IGNITION ON mode?
When locking the doors, turn the “START STOP ENGINE”
<“POWER”> switch off. ( →P. 206, 213)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the elec-
tronic key on your person.
●The function may not operate properly due to the condition of
the radio wave. ( →P. 1 3 4 )
If you have a problem, check the following before contacting your
Lexus dealer.
The doors cannot be locked, unlocked, opened or closed
Yo u l o s e y o u r k e y s
The doors cannot be locked or unlocked
Page 763 of 787
761What to do if... (Troubleshooting)
ES350_300h_OM_OM33B99U_(U)●
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. 1 4 5 )
●The function to prevent the electronic 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. 151)
The rear door cannot be opened
The trunk lid is closed with
the electronic key left inside
Page 764 of 787
762What to do if... (Troubleshooting)
ES350_300h_OM_OM33B99U_(U)●
Did you press the “START STOP ENGINE” <“POWER”>
switch while firmly depressing the brake pedal? (
→P. 205, 212)
●Is the shift lever in P? ( →P. 208, 215)
●Is the electronic key anywhere detectable inside the vehicle?
(→ P. 1 3 0 )
●Is the steering wheel unlocked? ( →P. 2 0 9 , 2 1 6 )
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a tem-
porary way. ( →P. 6 7 8 )
●Is the 12-volt battery discharged? ( →P. 6 8 0 , 6 8 4 )
●Is the “START STOP ENGINE” <“POWER”> switch in
IGNITION ON mode?
If you cannot release the shift lever by depressing the brake
pedal with the “START STOP ENGINE” <“POWER”> switch in
IGNITION ON mode ( →P. 6 76 )
If you think something is wrong
The engine does not start
The shift lever cannot be shifted from P even if you depress the
brake pedal
Page 765 of 787
763What to do if... (Troubleshooting)
ES350_300h_OM_OM33B99U_(U)●
It is locked automatically to prevent theft of the vehicle.
(→
P. 208, 215)
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat can-
not be operated if the window lock switch is pressed. ( →P. 177)
●Gasoline vehicles: The auto power off function will be operated
if the vehicle is left in ACCESSORY or IGNITION ON mode
(the engine is not running) for a period of time. ( →P. 2 0 8 )
●Hybrid vehicles: The auto power off function will be operated if
the vehicle is left in ACCESSORY or ON mode (the hybrid
system is not operating) for a period of time. ( →P. 215)
The steering wheel cannot be tu
rned after the engine
system> is stopped
The windows do not open or close by operating the power win-
dow switches
The “START STOP ENGINE” <“POWER”> switch is turned off
automatically
Page 766 of 787
764What to do if... (Troubleshooting)
ES350_300h_OM_OM33B99U_(U)●
The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts?
(→
P. 6 2 9 )
●The parking brake indicator is on
Is the parking brake released? (→ P. 2 3 1 )
Depending on the situation, othe r types of warning buzzer may
also sound. ( →P. 626, 636)
●Did anyone inside the vehicle open a door during setting the
alarm?
The sensor detects it and the alarm sounds. ( →P. 88)
To stop the alarm, turn the “START STOP ENGINE” <“POWER”>
switch to IGNITION ON mode or start the engine
system>.
●Is the electronic key left inside the vehicle or the moon roof
opened?
Check the message on the multi-information display.
(→ P. 6 3 6 )
A warning buzzer sounds during driving
An alarm is activated
and the horn sounds
A warning buzzer sounds wh en leaving the vehicle
Page 767 of 787
765What to do if... (Troubleshooting)
ES350_300h_OM_OM33B99U_(U)●
When a warning light turns on or a warning message is dis-
played, refer to P. 626, 636.
●Stop the vehicle in a safe place and replace the flat tire with the
spare tire. (
→P. 6 5 9 )
●Try the procedure for when the vehicle becomes stuck in mud,
dirt, or snow. (→ P. 6 9 7 )
A warning light turns on or a warning message is displayed
When a problem has occurred
If you have a flat tire
The vehicle becomes stuck
Page 768 of 787

766Alphabetical index
ES350_300h_OM_OM33B99U_(U)
Alphabetical index
A/CAir conditioning filter ....................... 582
Automatic air conditioning system ..................................................464
Humidity sensor ................................. 476
Micro dust and pollen filter ..........................................................471
ABS (Anti-lock Brake System) Function ................................................... 313
Warning light ....................................... 627
Air conditioning filter .......................... 582
Air conditioning system Air conditioning filter ....................... 582
Automatic air conditioning system ..................................................464
Humidity sensor ................................ 476
Micro dust and pollen filter ..........................................................471 Airbags
Airbag operating conditions .......... 46
Airbag precautions for your child ......................................... 41
Airbag warning light ........................ 627
Correct driving posture .................... 30
Curtain shield airbag operating conditions ....................... 46
Curtain shield airbag precautions ............................................ 41
Front passenger occupant classification system.........................50
General airbag precautions ............. 41
Locations of airbags............................ 38
Modification and disposal of airbags............................................... 45
Side airbag operating conditions ............................................. 46
Side airbag precautions ...................... 41
Side and curtain shield airbags operating conditions ....................... 46
Side and curtain shield
airbags precautions ........................... 41
SRS airbags ............................................. 38
Alarm ........................................................... 88 Warning buzzer .....................626, 636
Anchor brackets.......................................62
Antennas (smart access system with push-button start) ..................... 129
Anti-lock Brake System (ABS)
Function .................................................... 313
Warning light ....................................... 627
Approach warning (dynamic radar cruise control).........................264
Armrest .....................................................494
A