Steps to take in an emergency

Lexus RX / Lexus RX Owners manual / When trouble arises / Steps to take in an emergency

If a warning light turns on or a warning buzzer sounds...

Calmly perform the following actions if any of the warning lights comes on
or flashes. If a light comes on or flashes, but then goes off, this does not necessarily
indicate a malfunction in the system.

Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.

The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.

Stop the vehicle immediately.

Stop the vehicle immediately.

The following warning indicates the possibility of damage to the vehicle
that may lead to an accident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer.

Have the vehicle inspected by your Lexus dealer immediately.

Have the vehicle inspected by your Lexus dealer 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.

Follow the correction procedures.

Follow the correction procedures.

After taking the specified steps to correct the suspected problem, check
that the warning light goes off.

*1: Open door warning buzzer:

*1: Open door warning buzzer:
The open door warning buzzer sounds to alert one or more of the doors is not
fully closed (with the vehicle having reached a speed of 3 mph [5 km/h]).
*2: Driver's and front passenger’s seat belt buzzer:
The driver’s and front passenger’s seat belt buzzer 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 vehicle reaches a speed of 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.

SRS warning light

This warning light system monitors the airbag sensor assembly, front airbag sensors,
side and curtain shield airbag sensors, curtain shield airbag sensors, driver's seat
position sensor, driver's seat belt buckle switch, front passenger occupant classification
system, “AIR BAG ON” indicator light, “AIR BAG OFF” indicator light, front
passenger's seat belt buckle switch, seat belt pretensioner assemblies, inflators,
interconnecting wiring and power sources.

Front passenger detection sensor, passenger seat belt reminder and warning
buzzer

If luggage is placed on the front passenger seat, the front passenger detection
sensor may cause the warning light to flash and the warning buzzer to sound
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.

Electric power steering system warning light

When the voltage is low or drops, the electric power steering system warning light
may come on.

If the malfunction indicator lamp comes on while driving

Check that the fuel tank cap is not loose. If it is, tighten the cap securely.
The lamp will go off after several driving trips.
If the light does not go off even after several trips, contact your Lexus dealer as soon
as possible.

When the tire pressure warning light comes on

Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch will not turn off the tire pressure warning light.

The tire pressure warning light may come on due to natural causes

The tire pressure warning light may come on due to natural causes such as natural
air leaks and tire inflation pressure changes caused by temperature. In this case,
adjusting the tire inflation pressure will turn off the warning light (after a few minutes).

When a tire is replaced with a spare tire

The compact spare tire is not equipped with a tire pressure warning valve and transmitter.
If a tire goes flat, the tire pressure warning light will not turn off even though
the flat tire has been replaced with the spare tire. Replace the spare tire with the
repaired tire and adjust the tire inflation pressure. The tire pressure warning light
will go off after a few minutes.

If the tire pressure warning system is not functioning

The tire pressure warning system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
If tires not equipped with tire pressure warning valves and transmitters are used.
If the ID code on the tire pressure warning valves and transmitters is not registered
in the tire pressure warning computer.
If the tire pressure warning select switch is set to a different tire setting.
If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher.
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.).
If electronic devices or facilities using similar radio wave frequencies are nearby.
If a radio set at similar frequencies is in use in the vehicle.
If a window tint that affects the radio wave signals is installed.
If there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings.
If non-genuine Lexus wheels are used (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.).
If tire chains are used.
Vehicles with a full-size spare tire: If the spare tire is in a location subject to poor
radio wave signal reception.
Vehicles with a full-size spare tire: If a large metallic object which can interfere
with signal reception is put in the luggage compartment.

If the tire pressure warning light comes on after flashing frequently for 1 minute

If the tire pressure warning light comes on after flashing frequently for 1 minute
when the “POWER” switch is turned to ON mode, have it checked by your Lexus
dealer.

Customization

The vehicle speed linked seat belt reminder buzzer can be disabled.

CAUTION:
When the electric power steering system warning light comes on
The steering wheel may become extremely heavy.
If the steering wheel becomes heavier than usual when operating, hold firmly and
operate it using more force than usual.
If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury.
Stop your vehicle in a safe place as soon as possible. Adjust the tire inflation pressure
immediately.
If the tire pressure warning light comes on even after tire inflation pressure adjustment,
it is probable that you have a flat tire. Check the tires. If a tire is flat, change
it with the spare tire and have the flat tire repaired by the nearest Lexus dealer.
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.

CAUTION:
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 significantly
under-inflated. Accordingly, when the low tire pressure telltale (tire pressure
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 underinflated
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 illuminated,
the system may not be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety of reasons,
including the installation of replacement or alternate tires or wheels on the
vehicle that prevent the TPMS (tire pressure warning system) from functioning
properly. Always check the TPMS (tire pressure warning system) malfunction telltale
after replacing one or more tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow the TPMS (tire pressure warning
system) to continue to function properly.

NOTICE:
Precaution when installing a different tire
When a tire of a different specification or maker is installed, the tire pressure warning
system may not operate properly.

If a warning message is displayed

If a warning is shown on the multi-information display, stay calm and perform
the following actions:

1. Master warning light.

1. Master warning light.
The master warning light also
comes on or flashes in order to
indicate that a message is currently
being displayed on the
multi-information display.
2. Multi-information display.

If any of the warning lights comes on again after the following actions
have been performed, contact your Lexus dealer.

Stop the vehicle immediately. Continuing to drive the vehicle may be dangerous.

The following warning indicates a possible problem in the brake system.
Immediately stop the vehicle in a safe place and contact your Lexus
dealer.

Stop the vehicle immediately.

Stop the vehicle immediately.

A buzzer sounds and a warning message is shown on the multi-information
display. The following warning indicates the possibility of damage to
the vehicle that may lead to an accident. Immediately stop the vehicle in a
safe place and contact your Lexus dealer.

Have the vehicle inspected by your Lexus dealer immediately.

Have the vehicle inspected by your Lexus dealer immediately.

A buzzer sounds and a warning message is shown on the multi-information
display. Failure 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.

Follow the correction procedures.

Follow the correction procedures.

A buzzer sounds and a warning message is shown on the multi-information
display. After taking the specified steps to correct the suspected
problem, check that the warning message goes off.

Messages displayed when refueling

Messages displayed when refueling

The following messages are displayed after the fuel filler door opener is
pressed. If the messages do not change or are displayed continuously,
have the vehicle checked by your Lexus dealer.

Have the malfunction repaired immediately

Have the malfunction repaired immediately

After taking the specified steps to correct the suspected problem, check
that the warning message and light go off.

Warning light display in radar cruise mode

Warning light display in radar cruise mode

In the following cases, the warning light may not be displayed even if vehicle-tovehicle
distance decreases:
When your vehicle and the vehicle ahead are traveling at the same speed or the
vehicle ahead is traveling more quickly than your vehicle.
When the vehicle ahead is traveling at a very low speed.
Immediately after cruise control speed is set.
At the instant the accelerator pedal is depressed.

After changing the engine oil (U.S.A. only)

Make sure to reset the oil maintenance data.

If you have a flat tire

Remove the flat tire and replace it with the spare provided.

Before jacking up the vehicle

Stop the vehicle on a hard, flat surface.
Set the parking brake.
Shift the shift lever to P.
Vehicles with electronically modulated air suspension:
Turn off the height control.
Stop the hybrid system.
Turn on the emergency flashers.

Location of the spare tire, jack and tools

- Vehicles with a compact spare tire.

- Vehicles with a full-size spare tire

- Vehicles with a full-size spare tire

Taking out the jack

Taking out the jack

- Vehicles with a compact spare tire.

Pull the lever upward to fold back

Pull the lever upward to fold back
the front part of the deck board.

Pull the folded deck board upright.

Pull the folded deck board upright.

Pull on the attached hook to

Pull on the attached hook to
extend the string.

Use the hook to secure the deck

Use the hook to secure the deck
board as shown in the illustration.

Remove the jack after removing

Remove the jack after removing
the hook.

- Vehicles with a full-size spare tire.

Pull the lever upward to fold back

Pull the lever upward to fold back
the front part of the deck board.

Pull on the attached hook to

Pull on the attached hook to
extend the string.

Use the hook to secure the deck

Use the hook to secure the deck
board as shown in the illustration.

Remove the jack after removing

Remove the jack after removing
the hook.

Taking out the spare tire

1. Lift up the deck board. (See “Taking out the jack” for details.).
Remove the spare tire cover.
2. Loosen the center fastener that secures the spare tire.
- Vehicles with a compact spare tire.

- Vehicles with a full-size spare tire.

- Vehicles with a full-size spare tire.

Replacing a flat tire

Replacing a flat tire

Chock the tires.

Chock the tires.

Slightly loosen the wheel nuts (one

Slightly loosen the wheel nuts (one
turn).

Turn the tire jack portion “A” by

Turn the tire jack portion “A” by
hand until the notch of the jack is in
contact with the jack point.

Raise the vehicle until the tire is

Raise the vehicle until the tire is
slightly raised off the ground.

Remove all the wheel nuts and the

Remove all the wheel nuts and the
tire.
When resting the tire on the
ground, place the tire so that the
wheel design faces up to avoid
scratching the wheel surface.

Installing the spare tire

1. Remove any dirt or foreign matter

1. Remove any dirt or foreign matter
from the wheel contact surface.
If foreign matter is on the wheel
contact surface, the wheel nuts
may loosen while the vehicle is in
motion, causing the tire to come
off.

2. Install the spare tire and loosely tighten each wheel nut by hand
by approximately the same amount.
- Vehicles with a compact spare tire.

Tighten the nuts until the tapered

Tighten the nuts until the tapered
portion comes into loose contact
with the disc wheel seat.

- Vehicles with a full-size spare tire.

Turn the nuts until the washers

Turn the nuts until the washers
come into contact with the wheel.

Lower the vehicle.

Lower the vehicle.

Firmly tighten each wheel nut two

Firmly tighten each wheel nut two
or three times in the order shown
in the illustration.

Tightening torque:

76 ft•lbf (103 N•m, 10.5 kgf•m).

Stow the flat tire, tire jack and all tools.

The compact spare tire

The compact spare tire is identified by the label “TEMPORARY USE ONLY”
on the tire sidewall.
Use the compact spare tire temporarily, and only in an emergency.
Make sure to check the tire inflation pressure of the compact spare tire.

When using the compact spare tire

As the compact spare tire is not equipped with a tire pressure warning valve and
transmitter, low inflation pressure of the spare tire will not be indicated by the tire
pressure warning system. Also, if you replace the compact spare tire after the tire
pressure warning light comes on, the light remains on.

If you have a flat front tire on a road covered with snow or ice

Install the compact spare tire on one of the rear wheels of the vehicle. Perform the
following steps and fit tire chains to the front tires:
1. Replace a rear tire with the compact spare tire.
2. Replace the flat front tire with the tire removed from the rear of the vehicle.
3. Fit tire chains to the front tires.

After completing the tire change

The tire pressure warning system (if equipped) must be reset.

CAUTION:
Using the tire jack
Improper use of the tire jack may cause the vehicle to suddenly fall off the jack,
leading to death or serious injury.
Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.
Only use the tire jack that comes with this vehicle for replacing a flat tire.
Do not use it on other vehicles, and do not use other tire jacks for replacing tires
on this vehicle.
Always check that the tire jack is securely set to the jack point.
Do not put any part of your body under the vehicle while it is supported by the
jack.
Do not start or run the hybrid system while your vehicle is supported by the jack.
Do not raise the vehicle while someone is inside.
When raising the vehicle, do not put an object on or under the jack.
Do not raise the vehicle to a height greater than that required to replace the tire.
Use a jack stand if it is necessary to get under the vehicle.
Vehicles with electronically modulated air suspension: Be sure to turn off the
height control and stop the hybrid system.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured.

CAUTION:
Replacing a flat tire
Observe the following precautions to reduce the risk of death or serious injury:
Do not touch the disc wheels or the area around the brakes immediately after the
vehicle has been driven.
After the vehicle has been driven the disc wheels and the area around the brakes
will be extremely hot. Touching these areas with hands, feet or other body parts
while changing a tire, etc. may result in burns.
Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the wheel nuts to be excessively tightened, leading to
bolt or disc wheel damage. In addition, the oil or grease can cause the wheel nuts
to loosen and the wheel may fall off, causing a serious accident. Remove any oil or
grease from the wheel bolts or wheel nuts.
Have the wheel nuts tightened with a torque wrench to 76 ft•lbf (103 N•m, 10.5
kgf•m) as soon as possible after changing wheels.
Failure to follow these precautions could cause the wheel nuts to loosen and the
tire to fall off, resulting in death or serious injury.
When installing a tire, only use wheel nuts that have been specifically designed
for that wheel.
If there are any cracks or deformations in the bolt screws, nut threads or bolt
holes of the wheel, have the vehicle inspected by your Lexus dealer.
Failure to follow these precautions could cause the wheel nuts to loosen and the tire
to fall off, resulting in death or serious injury.
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, deceleration and braking, as well as sharp cornering.

CAUTION:
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.
VDIM.
Intuitive parking assist (if equipped).
Navigation system (if equipped).
Cruise control (if equipped).
Dynamic radar cruise control (if equipped).
Electronically modulated air suspension (if equipped).
Pre-Collision System (if equipped).
Also, not only can the following system not be utilized fully, but it may even negatively
affect the drive-train components:
AWD system (if equipped).
Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failure to observe
this precaution may lead to an accident causing death or serious injury.

NOTICE:
Do not drive the vehicle with a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel
beyond repair.
Be careful when driving over bumps with the compact spare tire installed on the
vehicle.
The vehicle becomes lower when driving with the compact spare tire compared to
when driving with standard tires. Be careful when driving over uneven road surfaces.
Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.
When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and transmitter
may be damaged if not handled correctly.
To avoid damage to the tire pressure warning valves and transmitters
Do not use liquid sealants on flat tires.

If the hybrid system will not start

Reasons for the hybrid system not starting vary depending on the situation.
Check the following and perform the appropriate procedure:
The hybrid system will not start even though the correct starting
procedure is being followed.

One of the following may be the cause of the problem:
The electronic key may not be functioning properly.
There may be a malfunction in the immobilizer system.
There may be a malfunction in the steering lock system.
The hybrid system may be malfunctioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malfunction, an interim measure is available
to start the hybrid system.

The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

One of the following may be the cause of the problem:
The 12-volt battery may be discharged.
The 12-volt battery terminal connections may be loose or corroded.

The interior lights and headlights do not turn on, or the horn does
not sound.

One of the following may be the cause of the problem:
One or both of the 12-volt battery terminals may be disconnected.
The 12-volt battery may be discharged.
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

Emergency start function

When the hybrid system does not start, the following steps can be used as
an interim measure to start the hybrid system if the “POWER” switch is
functioning normally:
1. Set the parking brake.
2. Shift the shift lever to P.
3. Turn the “POWER” switch to ACCESSORY mode.
4. Press and hold the “POWER” switch for about 15 seconds while
depressing the brake pedal firmly.
Even if the hybrid system can be started using the above steps, the system
may be malfunctioning. Have the vehicle inspected by your Lexus dealer.

If the shift lever cannot be shifted from P

If the shift lever cannot be shifted with your foot on the brake pedal, there
may be a problem with the shift lock system (a system to prevent accidental
operation of the shift lever). Have the vehicle inspected by your Lexus
dealer immediately.
The following steps may be used as an emergency measure to ensure that
the shift lever can be shifted:

1. Set the parking brake.
2. Turn the “POWER” switch to ACCESSORY mode.
3. Depress the brake pedal.

Pry the cover up with a flathead

Pry the cover up with a flathead
screwdriver or equivalent.

Press the shift lock override button.

Press the shift lock override button.
The shift lever can be shifted
while the button is pressed.

If you lose your keys

New genuine Lexus keys can be made by your Lexus dealer using the other
keys and the key number stamped on your key number plate.

If the electronic key does not operate properly

If communication between the electronic key and vehicle is interrupted
or the electronic key cannot be used because the battery is
depleted, the smart access system with push-button start and wireless
remote control cannot be used. In such cases, the doors can be opened and
the hybrid system can be started by following the procedure below.

Locking and unlocking the side doors and key linked functions

Use the mechanical key

Use the mechanical key
in order to perform the following
operations (driver’s door only):
1. Locks all the doors.
2. Closes the windows and moon
roof (turn and hold).
3. Unlocks the door.
Turning the key rearward unlocks
the driver's door. Turning the key
once again unlocks the other
doors.
4. Opens the windows and moon
roof (turn and hold).

Changing “POWER” switch modes and starting the hybrid system

1. Ensure that the shift lever is in P and depress the brake pedal.

2. Touch the Lexus emblem side of

2. Touch the Lexus emblem side of
the electronic key to the
“POWER” switch.
If any of the doors is opened or
closed while the key is being
touched to the switch, an alarm will
sound to indicate that the start
function cannot detect the electronic
key.

3. To change “POWER” switch modes: Within 10 seconds of the

3. 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.
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

Shift the shift lever to P and press the “POWER” switch as you normally do when
stopping the hybrid system.

Replacing the key battery

As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted.

If the vehicle 12-volt battery is discharged

The following procedures may be used to start the hybrid system if the vehicle’s
12-volt battery is discharged.
You can also call your Lexus dealer or a qualified repair shop.

If you have a set of jumper (or booster) cables and a second vehicle
with a 12-volt battery, you can jump start your vehicle by following the
steps below.
Open the hood and remove the engine compartment covers.
Remove the fuse box cover and open the exclusive jump starting
terminal cover.

Connect the jumper cables according to the following procedure:

Connect the jumper cables according to the following procedure:
1. Connect a positive jumper cable clamp to the exclusive jump starting
terminal on your vehicle
2. Connect a positive jumper cable clamp to the positive (+) battery
terminal on the second vehicle
3. Connect a negative cable clamp to the negative (-) battery terminal
on the second vehicle
4. Connect the clamp at the other end of the negative cable to a solid,
stationary, unpainted metallic point away from the exclusive jump
starting terminal and any moving parts, as shown in the illustration.
Start the engine of the second vehicle. Increase the engine
speed slightly and maintain 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 comes 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.

When the 12-volt battery is removed or discharged

The power back door must be initialized.
The hybrid system may not start.

NOTICE:
When handling jumper cables
When connecting the jumper cables, ensure that they do not become entangled in
the cooling fans or belt.
Avoiding accidental short-circuits
When connecting jumper cables, observe the following precautions:
Make sure each jumper cable is connected to the correct terminal.
Do not allow the ends of the jumper cable used for the “+” terminals to come into
contact with any other parts or metal surfaces in the area, such as brackets or
unpainted metal.
Do not allow the “+” and “-” terminals of the jumper cables to come into contact
with each other.
Exclusive jump starting terminal precaution
The exclusive jump starting terminal is to be used when charging the 12-volt battery
from another vehicle in an emergency. It cannot be used to jump start another vehicle.

If your vehicle overheats

The following may indicate that your vehicle is overheating:

l “ENGINE OVERHEAT” is shown on the multi-information display:
The engine may be overheating.
“HYBRID SYSTEM OVERHEAT” is shown on the multi-information
display:
A hybrid system component such as the power control unit or an
electric motor (traction motor) may be overheating.
Follow the correction procedure as described below.

Correction procedures

If “ENGINE OVERHEAT” is shown on the multi-information display

1. Stop the vehicle in a safe place and turn off the air conditioning
system.
2. 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.
3. Remove the engine compartment cover.
4. Check to see if the cooling fans are operating.
If the fans are operating:
Wait until the “ENGINE OVERHEAT” message disappears and
then stop the hybrid system.
If the fans are not operating:
Stop the hybrid system immediately and call your Lexus dealer.

After the hybrid system has cooled

After the hybrid system has cooled
down sufficiently, check the engine
coolant level and inspect the cooling
system for leaks.

Add engine coolant if necessary.

Add engine coolant if necessary.
Water can be used in an emergency
if engine coolant is unavailable.

Have the vehicle inspected at the nearest Lexus dealer as soon as possible.

Have the vehicle inspected at the nearest Lexus dealer as soon as possible.

If “HYBRID SYSTEM OVERHEAT” is shown on the multi-information
display

Stop the vehicle in a safe place and

Stop the vehicle in a safe place and
turn off the air conditioning system.
Ensure that the opening for the oil
cooler is not blocked by dirt or any
other foreign substance.If the
opening is not blocked or if the
message does not disappear after
some time the opening has been
cleaned, proceed to STEP 2.
Leave the hybrid system operating and carefully lift the hood.
Check if the cooling fans are operating.
If the fans are operating:
Wait until the “HYBRID SYSTEM OVERHEAT” message disappears
and then stop the hybrid system.
If the message does not disappear, call your Lexus dealer.
If the fans are not operating:
Stop the hybrid system immediately and call your Lexus dealer.

After the hybrid system has cooled

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

Add power control unit coolant if
necessary.
Water can be used in an emergency
if power control unit coolant
is unavailable.

Have the vehicle inspected at the nearest Lexus dealer as soon as possible.

Overheating

The following symptoms may occur when your vehicle is overheating:
Hybrid system output decreases.
Steam comes out from the engine area.

CAUTION:
To prevent an accident or injury when inspecting under the hood of your vehicle
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, causing serious
injuries such as burns.
Check that the indicator on the “POWER” switch and the READY indicator are
off.
For vehicles with a hybrid system, there are times when the gasoline engine automatically
starts to run or the cooling fans suddenly start to operate. Do not touch
or approach the rotating parts of the belt or fans. Doing so may lead to fingers,
clothes or tools getting caught, resulting in injury.
Do not loosen the radiator cap while the hybrid system and radiator are hot.
Serious injuries, such as burns, may result from hot coolant and steam released
under pressure.

NOTICE:
When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power control
unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid system too
quickly can cause damage to the hybrid system.

If the vehicle becomes stuck

Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:

1. Stop the hybrid system. Set the parking brake and shift the shift
lever to P.
2. Remove the mud, snow or sand from around the stuck tire.
3. Place wood, stones or some other material under the tires to
help provide traction.
4. Restart the hybrid system.
5. Shift the shift lever to the D or R position and carefully apply
the accelerator to free the vehicle.
Turn off the TRAC and VSC systems if these functions are hampering
your attempts to free the vehicle.

CAUTION:
When attempting to free a stuck vehicle
If you choose to push the vehicle back and forth to free it, make sure the surrounding
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 caution.
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.

NOTICE:
To avoid damage to the hybrid transmission and other components
Avoid spinning the wheels.
If the vehicle remains stuck even after these procedures are performed, the vehicle
may require towing to be freed.

    See also:

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