2009 Lexus GS450h coolant temperature

159
2
When driving
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
2-2. Instrument cluster
Gauges and meters
The units used on the speedometer may differ depending on the target
region.

The following gauges, meters and display illuminate when the
“POWER” switch is in ON mode.Power meter
Displays the instantaneous output from the hybrid system is approximate
kilowatts.
Speedometer
Displays the vehicle speed.
Fuel gauge
Displays the quantity of fuel remaining in the tank.
Engine coolant temperature gauge
Displays the engine coolant temperature.
Multi-information display
→ P. 1 6 6
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162
2-2. Instrument cluster
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
NOTICE
■To prevent damage to the engine and its components
The engine may be overheating if the engine coolant temperature gauge is in the
red zone (“H”). In this case, immediately stop the vehicle in a safe place. Check the
engine after it has cooled completely. (→P. 5 5 7 )
■To activate the light sensitivity function properly
Do not affix a sticker or window tint to the rear window glass, or put an object
behind the rear seat.
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434
4-3. Do-it-yourself maintenance
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury,
observe the following precautions.
■When working on the engine compartment
●Make sure that the indicator on the “POWER” switch and the “READY” indicator
are both off.
●Keep hands, clothing, and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, power control unit, radiator, exhaust manifold,
etc. right after driving as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper or rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes are flam-
mable.
■When working near the electric cooling fan or radiator grille
Be sure the “POWER” switch is OFF.
With the “POWER” switch in ON mode, the electric cooling fan may automatically
start to run if the air conditioning is on and/or the coolant temperature is high.
(→ P. 4 4 5 )
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in the eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to
dirt in the air. Also a backfire could cause a fire in the engine compartment.
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5
When trouble arises
507
5-1. Essential information
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
● Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points
higher than normal
■ Audible symptoms
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the hybrid system
■ Operational symptoms
● Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor
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5
When trouble arises
557
5-2. Steps to take in an emergency
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
If your vehicle overheats
If your hybrid system overheats:
Stop the vehicle in a safe place and turn off the air conditioning
system.
Check to see if steam is coming out from under the hood.
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. 4 3 9 )
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the engine coolant temperature gauge begins to
fall and then stop the hybrid system.
If the fan is not operating: Stop the hybrid system immediately and call your local
Lexus dealer.
After the hybrid system has
cooled down sufficiently, check
the coolant level and inspect the
radiator core (radiator) for any
leaks.STEP1
STEP2
STEP3
STEP4
STEP5
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558
5-2. Steps to take in an emergency
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
■Overheating
In the following situations, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●Steam is coming from under the hood.
●The message “HYBRID SYSTEM OVERHEAT” is displayed on the multi-infor-
mation display.
CAUTION
■To prevent an accident or injury when inspecting under the hood of your vehicle
●If steam is seen coming from under the food, do not open the food until the steam
has subsided. The engine compartment may be very hot, causing serious injury
such as burns.
●Keep hands and clothing away from the fan and engine drive belt while the hybrid
system is operating.
●Do not loosen the radiator cap while the hybrid system and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam released
under pressure.
Add coolant if necessary.
Water can be used in an emer-
gency measure if coolant is
unavailable. (→P. 569)
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6
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606
Alphabetical index
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
DoorsDoor lock.................................. 39, 51, 54
Rear door child protector ................ 55
Driver’s seat belt reminder light ...... 512
Driver’s seat position memory ........... 66
Driving
Correct posture .................................... 101
Procedures ............................................ 138
DVD player/changer..........................283
Electric power steering ....................... 214
Electronic key If the electronic key does not operate properly ................... 550
Replacing battery ...............................472
Emergency, in case of
If a warning light turns on ............... 510
If a warning message is displayed ............................................. 519
If the electronic key does
not operate properly ................... 550
If the hybrid system
will not start ....................................... 547
If the shift lever cannot be
shifted from “P”................................548
If the 12 volt battery is
discharged .......................................553
If you have a flat tire ............ 536, 546
If you lose your keys.........................549
If you think something is
wrong ................................................... 507
If your vehicle becomes stuck.... 560
If your vehicle needs to be towed .................................................... 501
If your vehicle overheats ................ 557
Energy monitor......................................... 29 Engine
ACCESSORY mode .....................149
Compartment ..................................... 438
Hood ....................................................... 435
How to start the hybrid system..................................... 148
If the hybrid system will not start ........................................547
Overheating ........................................ 557
Power (ignition) switch .................... 148
Engine compartment cover ............. 439
Engine coolant temperature gauge ...................................................... 159
Engine/power control unit coolant
Capacity ................................................ 569
Checking................................................444
Preparing and checking before winter..................................... 232
Engine oil Capacity ................................................ 567
Checking............................................... 440
Preparing and checking
before winter..................................... 232
Engine oil maintenance data ........... 442
Enhanced vehicle stability control .....................................................214
Event data recorder ............................508
First-aid kit storage belt ..................... 392
Floor mats ..................................................391
Fluid Brake ....................................................... 446
Washer..................................................... 451
Fog lights
Switch .........................................................172
Wattage ..................................................573
E
F
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614
GS_HV_U (OM30B44U)
April 27, 2009 10:09 am
What to do if...
What to do if...
A tire puncturesP. 5 3 6 /546If you have a flat tire
The hybrid system does not start
P. 9 6Immobilizer system
P. 5 4 7If the hybrid system will not start
P. 5 5 3If the 12 volt battery is discharged
The shift lever cannot be
moved outP. 5 4 8If the shift lever cannot be shifted
from “P”
The engine coolant temperature
gauge enters the red zone
Steam can be seen coming
from under the hood
P. 5 5 7If your vehicle overheats
The key is lostP. 5 4 9If you lose your keys
The 12 volt battery runs outP. 5 5 3If the 12 volt battery is discharged
The doors cannot be lockedP. 5 4Doors
The horn begins to soundP. 9 8Alarm
The vehicle is stuck in mud or
sandP. 5 6 0If the vehicle becomes stuck
GS450h_HV_U.book Page 614 Monday, April 27, 2009 10:10 AM