
5168-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
Indicates that the power switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned on
A buzzer also sounds.
→Turn the lights off.
(If equipped)
Indicates that the moon roof is not fully closed (with the
power switch off, and the driver’s door open)
A buzzer also sounds.
→Close the moon roof.
Indicates that the windows are not fully closed (with the
power switch off, and the driver’s door open)
A buzzer also sounds.
→Close all the windows.
(If equipped)
Indicates that the windows and the moon roof are not
fully closed (with the power switch off, and the driver’s
door open)
A buzzer also sounds.
→Close all the windows and the moon roof.
Indicates a malfunction in the brake override system
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that engine oil level is low
A buzzer also sounds.
→Check the level of engine oil, and add if necessary.
Indicates that the hybrid system has overheated
This message may be displayed when driving under
severe operating conditions. (For example, when driv-
ing up a long steep hill.)
A buzzer also sounds.
→Stop and check. (→P. 552)
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
(Flashes)
(Flashes)
(Flashes)
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5178-2. Steps to take in an emergency
8
When trouble arises
IS300h_EE(OM53C61E)
Indicates a malfunction in:
• The automatic headlight leveling system; or
• The Automatic High Beam system (if equipped)
• The LED headlight system (if equipped)
A buzzer also sounds.
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the accelerator and brake pedal are being
depressed simultaneously
→Release the accelerator or brake pedal.
Indicates that the cooling performance of the hybrid bat-
tery (traction battery) has dropped
→Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and
equipped professional.
Indicates that the washer fluid level is low
→Add washer fluid.
Indicates that remaining fuel is approximately 10 L (2.6
gal., 2.2 Imp. gal.) or less
→Refuel the vehicle.
Indicates that the TRC (Traction Control) system has
been deactivated
→Tu r n t h e T R C o n . (→P. 288)
(If equipped)
Indicates that all maintenance according to the driven
distance on the maintenance schedule
*1 should be per-
formed soon.
→If necessary, perform maintenance.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
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5188-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
(If equipped)
Indicates that all maintenance listed in the maintenance
schedule*1 corresponding to the current vehicle mile-
age is necessary.
(The indicator will not work properly unless the mainte-
nance data has been reset.)
→Perform the necessary maintenance. Please reset
the maintenance data after the maintenance is per-
formed (→P. 4 4 2 )
(If equipped)
Indicates that the Automatic High Beam switch is
pressed while the headlights are in low beam.
→Turn the high beam on and press the Automatic
High Beam switch again.
(If equipped)
Indicates that, since the VSC (Vehicle Stability Control)
system was turned off, the pre-crash brake system oper-
ation is stopped
→Tu r n t h e V S C o n . (→P. 2 8 8 )
(If equipped)
Indicates that the PCS (Pre-Crash Safety system) is not
currently functional because the grille cover or the sen-
sor is dirty
→Check the grille cover and the sensor and clean
them if they are dirty.
Indicates that operation of large electricity consuming
systems such as the air conditioning system are sus-
pended
→Stop using unnecessary electric components to
reduce electricity consumption. Wait a while until
the electric power supply is restored.
(If equipped)
Indicates that the LDA (Lane Departure Alert) system
cannot be used because the vehicle speed is lower than
approximately 50 km/h (32 mph)
→Drive the vehicle at 50 km/h (32 mph) or higher.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
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5248-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
Indicates that:
• With the power switch off, the
doors were unlocked and then the
driver’s door was opened and
closed;
• The power switch was turned to
ACCESSORY mode without
starting the hybrid system; or
• The shift lever was shifted to P
from another position with the
power switch in ON mode.
→Press the power switch while
depressing the brake pedal.
Once
The power switch has been turned
off with the shift lever in a position
other than P.
→Shift the shift lever to P.
Once
After the power switch has been
turned off with the shift lever in a
position other than P, the shift lever
has been shifted to P.
→Tu r n t h e p o w e r s w i t c h o f f .
Power was turned off due to the
automatic power off function.
→Next time when starting the
hybrid system, increase the
engine speed slightly and main-
tain that level for approximately
5 minutes to recharge the 12-
volt battery.
Con-
tinuous
Indicates that the hybrid system was
stopped in an emergency while driv-
ing
→To restart the hybrid system,
shift the shift lever to N and turn
the power switch to ON mode.
*
Interior
buzzerExteriorbuzzerWarning messageDetails/Actions
(Flashes)
(Flashes)
(Flashes)
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5428-2. Steps to take in an emergency
IS300h_EE(OM53C61E)
One of the following may be the cause of the problem:
●One or both of the 12-volt battery terminals may be disconnected.
●The 12-volt battery may be discharged. (→P. 5 4 7 )
Contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional if the problem cannot be repaired, or if repair procedures are
unknown.
When the hybrid system does not start, the following steps can be used as an
interim measure to start the hybrid system if the power switch is functioning nor-
mally:
Set the parking brake.
Shift the shift lever to P.
Turn the power switch to ACCESSORY mode.
Press and hold the power switch for about 15 seconds while depressing the
brake pedal firmly.
Even if the hybrid system can be started using the above steps, the system may
be malfunctioning. Have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
The interior lights and headlights do not turn on, or the horn does not
sound.
Emergency start function
1
2
3
4
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588What to do if... (Troubleshooting)
IS300h_EE(OM53C61E)
●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. 1 8 4 )
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or ON mode (the hybrid system is not operating) for a period of time.
(→P. 211)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (→P. 505)
●The parking brake indicator is on
Is the parking brake released? (→P. 2 2 4 )
Depending on the situation, other types of warning buzzer may also sound.
(→P. 503, 509)
●Did anyone inside the vehicle open a door or anything move inside the vehicle
during setting the alarm?
The sensor detects them and the alarm sounds. (→P. 9 6 )
To stop the alarm, turn the power switch to ON mode or start the hybrid system.The windows do not open or close by operating the power window
switches
The power switch is turned off automatically
A warning buzzer sounds during driving
An alarm is activated and the horn sounds (if equipped)
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590
IS300h_EE(OM53C61E)Alphabetical index
Alphabetical index
A/C ........................................................... 398
Air conditioning filter........................469
Automatic air conditioning
system ................................................. 398
S-FLOW mode................................. 400
Blower customization .................... 405
AAC disc .................................................. 341
ABS (Anti-lock Brake System) .......286
Function ..................................................286
Warning light ...................................... 504
Accent color .............................................. 117
Adaptive Variable Suspension
system .................................................... 287
Air conditioning filter .......................... 469
Air conditioning system .................... 398
Air conditioning filter........................469
Automatic air conditioning
system ................................................. 398
S-FLOW mode................................. 400
Blower customization .................... 405Airbags ........................................................ 43
Airbag manual on-off system......... 54
Airbag operating conditions ...........49
Airbag precautions for
your child .............................................. 45
Correct driving posture.................... 36
Curtain shield airbag operating
conditions ..............................................49
Curtain shield airbag
precautions ........................................... 47
General airbag precautions ........... 45
Locations of airbags ............................43
Modification and disposal of
airbags.................................................... 48
Side airbag operating
conditions ..............................................49
Side airbag precautions.................... 45
Side and curtain shield airbags
operating conditions ........................49
Side and curtain shield airbags
precautions .......................................... 45
SRS airbags ..............................................43
SRS warning light .............................. 504
A
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591Alphabetical index
IS300h_EE(OM53C61E)
Airbag manual on-off system ............. 54
Alarm ............................................................ 96
Anchor brackets ...................................... 69
Antennas (smart entry &
start system) ......................................... 149
Anti-lock Brake System (ABS) .......286
Function ..................................................286
Warning light ...................................... 504
Approach warning ............................... 254
Armrest ..................................................... 422
ASC (Active Sound Control).......... 225
Assist grips .............................................. 424
Audio input .............................................. 323
Audio system ........................................... 316
Audio CD player .................................341
Audio input ........................................... 323
AUX port/
USB port ............................................ 323
Bluetooth
® audio ..............................365
iPod...........................................................348
Optimal use ............................................331
Portable music player......................356
Radio ........................................................339
Steering wheel audio switch ........ 322
USB memory........................................ 351Automatic headlight leveling
system ................................................... 228
Warning light.......................................505
Automatic High Beam ...................... 229
Automatic light control system ...... 226
AUX port................................................. 323
Average fuel economy ......................... 116
Average vehicle speed ......................... 116
Back-up light
Replacing light bulb ......................... 485
Wattage ................................................. 570
Battery (12-volt battery) .....................447
If the 12-volt battery is
discharged ........................................ 547
Preparing and checking
before winter........................................ 311
Warning light....................................... 503
Battery (traction battery) ..................... 83
Blind Spot Monitor (BSM) .............. 299
Blower customization......................... 405
Bluetooth
®
Audio system....................................... 365
Hands-free system
(for cellular phone) ....................... 367
Bottle holders...........................................415
B
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