belt Lexus GS450h 2008 Workshop Manual

468
4-3. Do-it-yourself maintenance
GS_HV_U
June 19, 2008 1:15 pm
■Luggage compartment
FuseAmpereCircuit
1RR TAIL10Tail lights, license plate lights
2STOP LP R10High mounted stoplights, stoplights
3STOP LP L10Stoplights, back-up light
4RR FOG7. 5
5RR-B10Tr u n k l i g h t
6RR-IG110Pre-collision seat belt, seat belt pre-
tensioners
7RR-IG210
8PSB30Pre-collision seat belt
9RR S/SHADE7. 5Rear sunshade
10RH J/B-B30FR DOOR RH, RR DOOR RH,
AM2
11LH J/B-B30FR DOOR LH, RR DOOR LH,
RAD No.3
12R/B-B15D/C c ut
GS450h_HV_U.book Page 468 Thursday, June 19, 2008 1:44 PM

5
When trouble arises
489
5-1. Essential information
GS_HV_U
June 19, 2008 1:15 pm
Event data recorder
In a crash or a near car crash eventThe SRS airbag sensor assembly contains the EDR. In a crash or a near
car crash event, this device may record some or all of the following infor-
mation:
● Gasoline engine speed
● Whether the brake pedal was applied or not
● Ve h i c l e s p e e d
● To what extent the accelerator pedal was depressed
● Position of the transmission shift lever
● Whether the driver and front passenger wore seat belts or not
● Driver’s seat position
● SRS airbag deployment data
● SRS airbag system diagnostic data
● Front passenger’s occupant classification
Your vehicle has computers that monitor and control certain aspects of
your vehicle. These computers assist in driving and maintaining optimal
vehicle performance.
Besides storing data useful for troubleshooting, there is a system to record
data in a crash or a near car crash event. This is called an Event Data
Recorder (EDR).
GS450h_HV_U.book Page 489 Thursday, June 19, 2008 1:44 PM

492
5-2. Steps to take in an emergency
GS_HV_U
June 19, 2008 1:15 pm
Have the vehicle inspected immediately.Failing to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
*2: Electronically Controlled Brake System
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Malfunction indicator lamp Malfunction in:
• The electronic engine control system;
• The hybrid system;
• The electronic throttle control system; or
• The transmission control system.
SRS warning lightMalfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system.
(U.S.A.)

(Canada)
ABS warning lightMalfunction in:
•The ABS; or
• The brake assist system.
ECB*2/VSC warning light
Malfunction in:
• The electronically controlled brake system; or
•The VSC.
Electric power steering system warning light Malfunction in the EPS.
“PCS” warning light (if equipped)
Malfunction in the pre-collision system.
GS450h_HV_U.book Page 492 Thursday, June 19, 2008 1:44 PM

5
When trouble arises
493
5-2. Steps to take in an emergency
GS_HV_U
June 19, 2008 1:15 pm
Have the malfunction repaired immediately.After taking the specified steps to co rrect the suspected problem, check
that the warning light turns off.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)*3
A door or the trunk is not
fully closed.
Check that all doors and the
trunk are closed.
Low fuel level warning light
Remaining fuel
(Approximately 2.6 gal. [10
L, 2.2 Imp.gal.] or less)
Refuel the vehicle.
Driver’s seat belt reminder
light (warning buzzer)*4
Warns the driver to fasten
his/her seat belt.Fasten the seat belt.
Front passenger’s seat belt
reminder light
(warning buzzer)*
4
Warns the front passenger to
fasten his/her seat belt.
Fasten the seat belt.
Tire pressure warning light
When the light comes on:
Low tire inflation pressure.Adjust the tire inflation pres-
sure.
When the light comes on after
blinking for 1 minute:
Malfunction in the tire pres-
sure warning system.
Have the system checked by
your Lexus dealer.
GS450h_HV_U.book Page 493 Thursday, June 19, 2008 1:44 PM

494
5-2. Steps to take in an emergency
GS_HV_U
June 19, 2008 1:15 pm
*3: Open door warning buzzer:
→P. 5 0 5
*
4: Driver’s and front passenger’s seat belt reminder buzzer:
The driver’s and front passenger’s seat be lts reminder sounds to alert the driver
and front passenger that his or her seat belt is not fastened. The buzzer sounds
intermittently for 10 seconds after the ve hicle has reached a speed of at least 12
mph (20 km/h). Then, if the seat belt is still unfastened, the buzzer will sound in
a different tone for 20 more seconds.
Warning lightWarning light/DetailsCorrection procedure
Master warning light
A buzzer sounds and the
warning light comes on and
flashes to indicate that the
master warning system has
detected a malfunction.
Take appropriate action in
accordance with the message
displayed on the multi-infor-
mation display.
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is your vehicle low on gas?
If it is, refuel the vehicle immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after taking several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon
as possible.
GS450h_HV_U.book Page 494 Thursday, June 19, 2008 1:44 PM

5
When trouble arises
495
5-2. Steps to take in an emergency
GS_HV_U
June 19, 2008 1:15 pm
■Front passenger detection sensor and passenger seat belt reminder
●If luggage is placed on the front passenger seat, the front passenger detection
sensor may cause the warning light to flash, even if a passenger is not sitting in
the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the
warning light may not operate properly.
■SRS warning light
This warning light system monitors the following:
●The airbag sensor assembly
●Front airbag sensors
●The curtain shield and rear side airbag sensors
●The side and curtain shield airbag sensors
●The front passenger occupant classification ECU
●“AIR BAG ON” and “AIR BAG OFF” indicator lights
●The pressure sensor
●The belt tension sensor
●The seat belt buckle switches
●The driver’s seat position sensor
●The inflators
●The warning light
●The interconnecting wiring and power sources
■If the tire pressure warning light comes on after blinking for 1 minute frequently
If the tire pressure warning light comes on after blinking for 1 minute frequently
when the “POWER” switch is turned to ON mode, have it checked by your Lexus
dealer.
GS450h_HV_U.book Page 495 Thursday, June 19, 2008 1:44 PM

5
When trouble arises
537
5-2. Steps to take in an emergency
GS_HV_U
June 19, 2008 1:15 pm
CAUTION
■Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while related parts
contain lead and lead compounds. Observe the following precautions when han-
dling the battery:
●When working with the battery, always wear safety glasses and take care not to
allow any battery fluids (acid) to come into contact with skin, clothing or the vehi-
cle body.
●Do not lean over the battery.
●If the battery fluid comes into contact with the skin or eyes, immediately wash the
affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention can be
received.
●Always wash your hands after handling the battery support, terminals, and other
battery-related parts.
●Do not allow children near the battery.
NOTICE
■When handling jumper cables
Be careful that the jumper cables do not become tangled in the cooling fan or any
of the belts when connecting or disconnecting them.
GS450h_HV_U.book Page 537 Thursday, June 19, 2008 1:44 PM

5
When trouble arises
539
5-2. Steps to take in an emergency
GS_HV_U
June 19, 2008 1:15 pm
■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
●Keep hands and clothing away from the fan and engine drive belt while the hybrid
system is running.
●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. 5 4 8 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6
GS450h_HV_U.book Page 539 Thursday, June 19, 2008 1:44 PM

546
6-1. Specifications
GS_HV_U
June 19, 2008 1:15 pm
Engine
Fuel
Electric motor (Traction motor)
Hybrid battery (Traction battery)
Model2GR-FSE
Ty p e6-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70 × 3.27 in. (94.0 × 83.0 mm)
Displacement210.9 cu.in. (3456 cm3)
Drive belt tensionAutomatic adjustment
Fuel typePremium unleaded gasoline only
Octane Rating91 (Research Octane Number 96) or higher
Fuel tank capacity17.2 gal. (65 L, 14.3 lmp.gal.)
Ty p ePermanent magnet synchronous motor
Maximum output147 kW
Maximum torque275 N•m (28.0 kgf•m, 202.8 ft•lbf.)
Ty p eNickel-Metal hydride battery
Vo l t a g e7. 2 V/m o d u l e
Capacity6.5 Ah (3HR)
Quantity40 modules
Overall voltage288 V
GS450h_HV_U.book Page 546 Thursday, June 19, 2008 1:44 PM

560
6-1. Specifications
GS_HV_U
June 19, 2008 1:15 pm
Tire section names
Bead
Sidewall
Shoulder
Tr e a d
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
Uniform Tire Quality GradingThis information has been prepared in accordance with regulations
issued by the National Highway Traffic Safety Administration of the
U.S.A. Department of Transportation.
It provides the purchasers and/or prospective purchasers of Lexus vehi-
cles with information on uniform tire quality grading.
Your Lexus dealer will help answer any questions you may have as you read
this information.
GS450h_HV_U.book Page 560 Thursday, June 19, 2008 1:44 PM