engine Lexus GS450h 2014 Repair Manual

7587-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
Indicates that the hybrid
battery (traction battery)
is low
When stopping the vehi-
cle for a long period of
time, shift the shift lever to
P. The battery cannot be
charged with the shift
lever in N.
Indicates that the hybrid
battery (traction battery)
power has dropped
because a long period of
time has elapsed after
shifting the shift lever to
N
Restart the hybrid system
when starting the vehicle.
Indicates that the gaso-
line engine cannot oper-
ate or the shift lever is in
N for a long time
Stop the vehicle and shift
the shift lever to P.
Indicates that the accel-
erator pedal is depressed
while the shift position is
in NRelease the accelerator
pedal and shift the shift
lever to D, S or R.
Warning messageDetailsCorrection procedure
(Flashes)
(Flashes)
(Flashes)
(Flashes)
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7597-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
7
When trouble arises
*: For the EV drive mode operating conditions: →P. 2 0 0
Indicates that the EV
drive mode is not avail-
able
*
The reason the EV
drive mode is not avail-
able (the vehicle is
idling, battery charge is
low, speed is higher
than the EV drive
mode operating speed
range, accelerator
pedal is depressed too
much) may be dis-
played.
Use the EV drive mode
when it becomes avail-
able.
Indicates that the EV
drive mode has been
automatically canceled
*
The reason the EV
drive mode is not avail-
able (the battery
charge is low, speed is
higher than the EV
drive mode operating
speed range, accelera-
tor pedal is depressed
too much) may be dis-
played.
Drive the vehicle for a
while.
Indicates that engine oil
level is lowCheck the level of engine
oil, and add if necessary.
Warning messageDetailsCorrection procedure
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7627-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
Indicates that the LKA
(Lane-Keeping Assist)
system detects no-
handed driving (while the
lane keeping assist func-
tion is operating)The warning buzzer
sounds twice.
Grip the steering wheel
firmly.
Indicates that the Blind
Spot Monitor sensors or
the surrounding area on
the bumper is dirty or
covered with ice
Clean the sensor and its
surrounding area on the
bumper.
Indicates that the hybrid
system has overheatedThis message may be
displayed when driving
under severe operating
conditions. (For exam-
ple, when driving up a
long steep hill.)
Stop and check.
(→ P. 800)
Indicates that the hybrid
system output is limited
because the engine oil is
overheatedDrive the vehicle at a safe
speed until the warning
message disappears.
Warning messageDetailsCorrection procedure
(If equipped)
(If equipped)
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7727-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
InteriorbuzzerExterior
buzzerWarning messageDetailsCorrection procedure

Po we r w a s t u r n e d
off due to the auto-
matic power off
function.
Next time
when start-
ing the
hybrid sys-
tem,
increase the
engine
speed
slightly and
maintain
that level for
approxi-
mately 5
minutes to
recharge
the 12-volt
battery.
OnceThe electronic key
has a low battery.
Replace the
electronic
key battery.
( → P. 6 9 4 )
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7867-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
CAUTION
■When using the compact spare tire
●Remember that the compact spare tire provided is specifically designed for use
with your vehicle. Do not use your compact spare tire on another vehicle.
●Do not use more than one compact spare tire simultaneously.
●Replace the compact spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting opera-
tions that cause sudden engine braking.
■When the compact spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may
not operate correctly:
• ABS & Brake assist
•VSC
•TRAC
•Cruise control
• Dynamic radar cruise control (if equipped)
• PCS (if equipped)
•EPS • AFS (if equipped)
•AVS
• LKA (Lane-Keeping Assist)
(if equipped)
• Rear view monitor system
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)
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7977-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
7
When trouble arises
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
Open and close any of the doors of your vehicle with the power switch
off.
Maintain the engine speed of the second vehicle and start the hybrid
system of your vehicle by turning the power switch to ON mode.
Make sure the “READY” indicator comes on. If the indicator does not
come on, contact your Lexus dealer.
Once the hybrid system has started, remove the jumper cables in the
exact reverse order from which they were connected.
Once the hybrid system starts, have the vehicle inspected at your Lexus
dealer as soon as possible.
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of certain elec-
trical appliances. If the vehicle is left for a long time, the 12-volt battery may dis-
charge, and the hybrid system may be unable to start. (The 12-volt battery recharges
automatically while the hybrid system is operating.)
3
4
5
6
7
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800
GS450h_OM_OM30D52U_(U)
7-2. Steps to take in an emergency
If your vehicle overheats
■If the needle of the engine coolant temperature gauge enters the red
zone
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has cooled down sufficiently, inspect the
hoses and cooling system for leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact your
Lexus dealer.
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( →P. 91) enters
the red zone or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
●“Hybrid System Overheat” ( →P. 762) is shown on the multi-informa-
tion display.
●Steam comes out from under the hood.
Correction procedures
1
2
3
1
2
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8017-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
7
When trouble arises
The coolant level is satisfactory if it is between the “FULL” and
“LOW” lines on the reservoir.Reservoir
“FULL”
“LOW”
Coolant inlet cap
Add coolant if necessary.
(→ P. 803)
Water can be used in an emer-
gency if engine coolant is unavail-
able.
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fans operate and to check for coolant
leaks from the radiator or hoses.
The fans operate when the air conditioning system is turned on immediately
after a cold start. Confirm that the fans are operating by checking the fan
sound and air flow. If it is difficult to check these, turn the air conditioning sys-
tem on and off repeatedly. (The fans may not operate in freezing tempera-
tures.)
If the fans are not operating:
Stop the hybrid system immediatel y and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
4
1
2
3
4
5
6
7
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8047-2. Steps to take in an emergency
GS450h_OM_OM30D52U_(U)
CAUTION
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartment may be very hot.
●After the hybrid system has been turned off, check that the indicator on the
power switch and the “READY” indicator are off.
When the hybrid system is operating, the gasoline engine may automatically
start, or the cooling fan may suddenly operate even if the gasoline engine stops.
Do not touch or approach rotating parts such as the fan, which may lead to fin-
gers or clothing (especially a tie, a scarf or a muffler) getting caught, resulting in
serious injury.
NOTICE
■When adding engine/power control unit coolant
Add coolant slowly after the hybrid system has cooled down sufficiently. Adding
cool coolant to a hot hybrid system too quickly can cause damage to the hybrid
system.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust etc.).
●Do not use any coolant additives.
●Do not loosen the coolant inlet cap or the
coolant reservoir cap while the hybrid sys-
tem and radiator are hot.
High temperature steam or coolant could
spray out.
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GS450h_OM_OM30D52U_(U)
8098-1. Specifications
8
Vehicle specifications
■Vehicle identification number
The vehicle identification number (VIN) is the legal identifier for your
vehicle. This is the primary identification number for your Lexus. It is
used in registering the ownership of your vehicle.
This number is stamped on the top left of the instrument panel and in
the engine compartment.
This number is also on the Certifi-
cation Label.
■Engine number
The engine number is stamped
on the engine block as shown.
Vehicle identification
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