stop start Lexus HS250h 2010 Owner's Guide

463
4-3. Do-it-yourself maintenance
4
Maintenance and care
HS250h_U_75033U(Canada)
3IGN10 A
Electronically controlled brake sys-
tem, multiport fuel injection system/
sequential multiport fuel injection sys-
tem, Lexus link system, smart access
system with push-button start, stop
lights
4MET7. 5 AMeters
5WIP30 AWindshield wipers
6WA S H E R15 AWindshield washer
7A/C10 AAir conditioning system
8GAUGE10 AAFS, turn signal lights, emergency
flasher lights
9AFS10 AAdaptive front-lighting system
10ECU-IG NO.210 A
Pre-collision system, LKA, dynamic
radar cruise control, air conditioning
system, outside rear view mirror,
HUD, navigation system, tire inflation
pressure warning system
FuseAmpereCircuit

When trouble arises5
481
HS250h_U_75033U(Canada)
5-1. Essential informationEmergency flashers .............. 482
If your vehicle needs to be towed ...................................... 483
If you think something is wrong ...................................... 489
Event data recorder.............. 490
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer
sounds..................................... 492
If a warning message is displayed................................. 501
If you have a flat tire................ 521
If the hybrid system will not start ......................................... 530
If you lose your keys .............. 532
If the electronic key does not operate properly.......... 533
If the vehicle 12-volt battery is discharged ......... 536
If your vehicle overheats ...... 541
If the vehicle becomes stuck........................................ 545
If your vehicle has to be stopped in an
emergency ............................. 547

5
When trouble arises
499
5-2. Steps to take in an emergency
HS250h_U_75033U(Canada)
CAUTION
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could
lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold
and inflated to the inflation pressure recommended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label (tire and load information label).
(If your vehicle has tires of a different size than the size indicated on the vehicle
placard or tire inflation pressure label [tire and load information label], you should
determine the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure
monitoring system (TPMS-tire pressure warning system) that illuminates a low tire
pressure telltale (tire pressure warning light) when one or more of your tires is sig-
nificantly under-inflated. Accordingly, when the low tire pressure telltale (tire pres-
sure warning light) illuminates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling
and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a substitute for
proper tire maintenance, and it is the driver’s responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger illumination of
the TPMS low tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system)
malfunction indicator to indicate when the system is not operating properly. The
TPMS (tire pressure warning system) malfunction indicator is combined with the
low tire pressure telltale (tire pressure warning light). When the system detects a
malfunction, the telltale will flash for approximately one minute and then remain
continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists. When the malfunction indicator is illumi-
nated, the system may not be able to detect or signal low tire pressure as intended.

510
5-2. Steps to take in an emergency
HS250h_U_75033U(Canada)
Alerts the driver that the
vehicle is out of the lanes
(while the LKA system is
operating).A buzzer also sounds.
The lane markings and/
or the steering wheel
marking flash.
At the same time,
will appear on
the head-up display (the
image flashes).
Check the road condi-
tions and drive the vehicle
at a safe speed.
Indicates that the hybrid
system has overheated A buzzer also sounds.Stop and check.
(→ P. 5 4 1 )
(Flashes)
Indicates that the traction
battery is low
The warning buzzer
sounds intermittently.
When stopping the vehi-
cle for a long period of
time, change the shift
position to P. The battery
cannot be charged with
the shift position in N.
(Flashes)
Indicates that the traction
battery power has
dropped because a long
period of time has
elapsed after changing
the shift position to NThe warning buzzer
sounds continuously.
Restart the hybrid system
when starting the vehicle.
Wa r n i n g m e s s a g eDetailsCorrection procedure

5
When trouble arises
535
5-2. Steps to take in an emergency
HS250h_U_75033U(Canada)To change “POWER” switch modes: Within 10 seconds of the
buzzer sounding, release the brake pedal and press the
“POWER” switch. Modes can be changed each time the switch is
pressed. (
→P. 1 4 6 )
To start the hybrid system: Press the “POWER” switch within 10
seconds of the buzzer sounding, keeping the brake pedal
depressed.
In the event that the hybrid system still cannot be operated, contact your
Lexus dealer.
■Stopping the hybrid system
In the same method as the normal hybrid system stopping procedure, completely
stop the vehicle and then press the “POWER” switch.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the elec-
tronic key battery be replaced immediately when the battery is depleted.
( → P. 4 5 3 )
■When the electronic key does not work properly
Make sure that the smart access system with push-button start has not been deacti-
vated in the customization setting. If it is off, turn the function on.
(Customizable features →P. 5 74 )

5
When trouble arises
541
5-2. Steps to take in an emergency
HS250h_U_75033U(Canada)
If your vehicle overheats
Correction procedures■ If the engine coolant temperature warning light comes on or flashes
Stop the vehicle in a safe place and turn off the air conditioning
system.
Check to see if steam is coming out from the engine area.
If you see steam:
Stop the hybrid system. Carefully lift the hood after the steam
subsides and then restart the hybrid system.
If you do not see steam:
Leave the hybrid system operating and carefully lift the hood.
Remove the engine compartment cover. ( →P. 423)
Check to see if the cooling fans are operating.
If the fans are operating:
Wait until the high engine coolant temperature warning light goes
off and then stop the hybrid system.
If the fans are not operating:
Stop the hybrid system immediately and call your Lexus dealer.
The following may indicate that your vehicle is overheating:
● The high engine coolant temperature warning light comes on or
flashes:
The engine may be overheating.
● “HYBRID SYSTEM OVERHEAT” is shown on the multi-information
display:
The power control unit may be overheating.
Follow the correction procedure as described below.

5
When trouble arises
545
5-2. Steps to take in an emergency
HS250h_U_75033U(Canada)
If the vehicle becomes stuck
■When changing the shift position
Depress the brake pedal and ensure that the vehicle has stopped completely
before changing the shift position. Failure to do so could cause the rejection func-
tion to be activated, canceling the shift position change, or causing the shift position
to change to N automatically.
CAUTION
■When attempting to free a stuck vehicle
If you choose to rock the vehicle back and forth to free it, make sure the surround-
ing area is clear to avoid striking other vehicles, objects or people. The vehicle may
also lunge forward or lunge back suddenly as it becomes free. Use extreme cau-
tion.
■When shifting the shift lever
Be careful not to shift the shift lever with the accelerator pedal depressed.
This may lead to unexpected rapid acceleration of the vehicle that may cause an
accident resulting in death or serious injury.
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:
Apply the parking brake, change the shift position to P and
stop the hybrid system.
Remove the mud, snow or sand from around the stuck tire.
Place wood, stones or some other material under the tires to
help provide traction.
Restart the hybrid system.
Make sure to change the shift position to D or R, release the
parking brake, and then carefully depress the accelerator
pedal.
Turn off the TRAC and VSC systems if these functions are hamper-
ing your attempts to free the vehicle. (→ P. 2 2 6 )

597
Alphabetical index
HS250h_U_75033U(Canada)
If your vehicle has to be stopped in an emergency............................. 547
If your vehicle needs to be towed ................................................... 483
If your vehicle overheats.................. 541
Emergency flasher
Switch ...................................................... 482
Engine
Accessory mode ................................. 146
Compartment ......................................422
Engine switch ........................................ 145
Hood ......................................................... 419
How to start the engine.................... 145
How to start the hybrid system.................................................... 145
Identification number.......................550
If the engine will not start ...............530
If the hybrid system will not
start........................................................530
Ignition switch........................................ 145
Overheating........................................... 541
Power switch ......................................... 145
Engine compartment cover..............423
Engine coolant Capacity................................................. 554
Checking ............................................... 428
Preparing and checking before winter.....................................244
Engine/power control unit coolant Capacity................................................. 554
Checking ............................................... 428
Preparing and checking
before winter.....................................244
Engine immobilizer system ..................96 Engine oil
Capacity .................................................552
Checking ............................................... 424
Preparing and checking
before winter .................................... 244
Engine oil maintenance data............ 426
Engine switch .......................................... 145
Enhanced VSC...................................... 225
EPS ............................................................. 225
EV drive mode switch.......................... 150
Event data recorder ............................490
Floor mat ................................................. 380
Fluid
Brake ....................................................... 556
Washer ................................................... 432
Fog lights Replacing light bulbs ....................... 469
Switch........................................................ 194
Wattage................................................. 558
Foot light...................................................360
Foot well lighting ...................................360
Front fog lights Replacing light bulbs ....................... 469
Switch........................................................ 194
Wattage................................................. 558
Front passenger occupant classification system ............................ 116
Front passenger's seat belt reminder light......................................495
Front seats Adjustment ............................................... 64
Driver’s seat position memory .......68
F
*: Refer to “Navigation System Owner’s Manual”.