engine temperature Lexus HS250h 2010 User Guide

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
543
5-2. Steps to take in an emergency
HS250h_U_75033U(Canada)After the hybrid system has cooled
down, check the power control
unit coolant level and inspect the
cooling system for leaks.
Add power control unit coolant if
necessary.
Water can be used in an emer-
gency if power control unit coolant
is unavailable. (
→P. 5 5 4 )
Have the vehicle inspected at the nearest Lexus dealer as soon as possi-
ble.
■Overheating
The following symptoms may occur when your vehicle is overheating:
●The high engine coolant temperature warning light comes on or flashes, or the
hybrid system output decreases.
●Steam comes out from the engine area.
●“HYBRID SYSTEM OVERHEAT” is displayed on the multi-information display.

553
6-1. Specifications
6
Vehicle specifications
HS250h_U_75033U(Canada)■
Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil” or equivalent to satisfy the follow-
ing grade and viscosity.
Oil grade: ILSAC multigrade engine oil
Recommended viscosity: SAE 5W-20 or 0W-20
SAE 5W-20 or 0W-20 engine oil
may be used. However, SAE 0W-
20 is the best choice for good fuel
economy and good starting in cold
weather.
The 0W portion of the oil viscosity rating indicates the characteristic of the oil
which allows cold startability. Oils with a lower value before the W allow for
easier starting of the engine in cold weather.
The 20 in 0W-20 indicates the oil viscosity when the oil is at its operating
temperature. An oil with a higher viscosity may be better suited if the vehicle
is operated at high speeds, or under extreme load conditions.
How to read oil container label:
The ILSAC (International Lubricant Standardization and Approval Com-
mittee) Certification Mark is added to some oil containers to help you
select the oil you should use.
Outside temperature

568
6-1. Specifications
HS250h_U_75033U(Canada)
Warning: The temperature grades of a tire assume that it is properly inflated
and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of transmission, power
steering, power brakes, power windows, power seats,
radio and heater, to the extent that these items are
available as factory-installed equipment (whether
installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, air conditioning and
additional weight optional engine
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1
* that follows

600
Alphabetical index
HS250h_U_75033U(Canada)
Odometer................................................. 162
OilEngine oil ............................................... 424
Opener
Fuel filler door......................................... 92
Hood..........................................................419
Trunk ........................................................... 60
OPEN CLOSE switch*
Outer foot lights Outer foot lights .................................360
Wattage................................................. 558
Outside rear view mirrors
Adjusting and folding ......................... 83
Driving position memory.................. 68
Mirror position memory ................... 68
Outside rear view mirror
defogger switch (vehicles
without navigation system) ............260
Outside rear view mirror defogger switch (vehicles
with navigation system)*
Outside temperature display............ 169
Overhead console ...............................370
Overheating, Engine............................ 541
Overheating, Hybrid system ............ 541
Parking brake .......................................... 160
Parking lights
Replacing light bulbs........................ 469
Switch ....................................................... 183
Wattage................................................. 558
PCS ............................................................ 232
Personal lights Personal lights .......................................361
Switch ........................................................361
Wattage................................................. 558 Power outlet ........................................... 374
Power switch ............................................145
Power windows ........................................ 86
Pre-collision system ............................ 232
Radar cruise control............................ 205
Radiator .................................................... 430
Radio......................................................... 265
Radio data system ................................ 267
RDS ............................................................ 267
Rear side marker lights
Replacing light bulbs ........................479
Wattage .................................................558
Rear sunshade ....................................... 378
Rear turn signal lights Replacing light bulbs ....................... 470
Wattage .................................................558
Rear view mirror
Compass ................................................. 391
Rear view monitor system*
Rear window defogger (vehicles without navigation system)............ 260
Rear window defogger (vehicles with navigation system)*
Remote Touch*
Replacing Electronic key battery ..................... 453
Fuses........................................................ 455
Light bulbs ............................................ 469
Tires............................................................ 521
Reporting safety defects for U.S. owners..........................................588
Safety connect ....................................... 395
Scuff lighting ........................................... 360O
P
R
S

603
Alphabetical index
HS250h_U_75033U(Canada)
Snow tires...............................................244
Spare tire ................................................. 521
Tire pressure warning system...................................... 437, 495
Tools ............................................................ 521
Total load capacity................................243
Towing Dinghy towing..................................... 248
Emergency towing ........................... 483
Trailer towing........................................247
TRAC .........................................................225
Traction control .....................................225
Trailer towing .......................................... 247
Trip meter.................................................. 162
Trunk Opener...................................................... 60
Turn signal lights Replacing light bulbs ....................... 469
Switch ........................................................159
Wattage .................................................558
Vanity lights Vanity lights ...........................................372
Wattage .................................................558
Vanity mirrors.........................................372
Vehicle identification number ........ 550
Vehicle stability control ......................225
Ventilators................................................375
VIEW switch*
VSC ............................................................225
Warning buzzers Brake system ....................................... 492
Open door .......................................... 495
Seat belt reminder ............................ 495 Warning lights
AFS OFF ................................................493
Anti-lock brake system ...................493
Brake assist system ...........................493
Brake system........................................492
Charging system................................ 492
Cruise control......................................493
Electric power steering
warning light .....................................493
Electronic engine control
system ..................................................493
High coolant temperature............. 492
Hybrid battery system .....................493
LKA ...........................................................493
Low fuel level ...................................... 495
Low tire pressure .............................. 495
Malfunction indicator lamp ...........493
Master warning light........................ 495
Open door ........................................... 495
Pre-collision system..........................493
Pretensioner .........................................493
Radar cruise co ntrol .........................493
Seat belt reminder light.................. 495
Slip indicator .........................................493
SRS airbags...........................................493
Tire pressure warning light .......... 495
Warning messages Cruise control..................................... 502
Dynamic radar cruise control .....................................502, 505
Electric power steering system ................................................. 502
Engine oil maintenance ................. 505
Engine oil pressure ............................ 501
EV drive mode................................... 505
V
W
*: Refer to “Navigation System Owner’s Manual”.

605
HS250h_U_75033U(Canada)
What to do if...
What to do if...
A tire puncturesP. 5 2 1If you have a flat tire
The hybrid system does not start
P. 5 3 0If the hybrid system will not start
P. 9 6Immobilizer system
P. 5 3 6If the vehicle 12-volt battery is dis-
charged
The engine coolant temperature
warning light flashes or come on
Steam can be seen coming
from under the hood
P. 5 4 1If your vehicle overheats
The key is lostP. 5 3 2If you lose your keys
The 12-volt battery runs outP. 5 3 6If the vehicle 12-volt battery is dis-
charged
The doors cannot be lockedP. 5 7Doors
The horn begins to soundP. 9 8Alarm
The vehicle is stuck in mud or
sandP. 5 4 5If the vehicle becomes stuck
A warning light or indicator
light comes onP. 4 9 2If a warning light turns on or a warning
buzzer sounds...

607
What to do if...
HS250h_U_75033U(Canada)
■Warning lights
P. 4 9 4
or
P. 4 9 2P. 4 9 4
P. 4 9 2P. 4 9 4
P. 4 9 3P. 4 9 4
P. 4 9 3P. 4 9 4
P. 4 9 5
or
P. 4 9 3P. 4 9 5
P. 4 9 3P. 4 9 5
P. 4 9 5
or
P. 4 9 3P. 4 9 5
P. 4 9 4P. 4 9 6
P. 4 9 4
Brake system warning light
(red indicator)“AFS OFF” indicator light
Slip indicator light
Charging system warning
light“LKA” indicator light
High engine coolant temperature
warning lightCruise control indicator light
Brake system warning light(yellow indicator)Radar cruise control
indicator light
Malfunction indicator lampOpen door warning light
Low fuel level warning light
SRS warning lightDriver’s seat belt reminder
light
“ABS” warning lightFront passenger’s seat belt
reminder light
Master warning light
Electric power steering system warning lightTire pressure warning light
Pre-collision system warning
light