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LEXUS IS 350 (2019 year). Instruction - part 36

568

8-2. Steps to take in an emergency

IS350 AWD/IS350/IS300 AWD/IS300_U

WARNING

■

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 tires simultaneously.

●

Replace the compact spare tire with a standard tire as soon as possible.

●

Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations

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:

Also, not only can the following system not be utilized fully, but it may even negatively

affect the drive-train components:
• AWD system

■

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.

■

After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their storage

location to reduce the possibility of personal injury during a collision or sudden brak-

ing.

• ABS & Brake assist

• VSC

• TRAC

• Dynamic radar cruise control

• PCS

• EPS

• AFS (if equipped)

• Adaptive Variable Suspension System

(if equipped)

• LDA (Lane Departure Alert with

steering control)

• Lexus parking assist monitor

(if equipped)

• Intuitive parking assist (if equipped)

• Navigation system (if equipped)

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IS350 AWD/IS350/IS300 AWD/IS300_U

NOTICE

■

Be careful when driving over bumps with the compact spare tire installed on the vehi-

cle
When driving with the compact spare tire installed, the vehicle height will be different

than when driving with standard tires. Be careful when driving over uneven road sur-

faces, etc.

■

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 trans-

mitter, contact your Lexus dealer as the tire pressure warning valve and transmitter

may be damaged if not handled correctly.

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8-2. Steps to take in an emergency

IS350 AWD/IS350/IS300 AWD/IS300_U

One of the following may be the cause of the problem:

●

There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.

●

The engine may be flooded.
Try to restart the engine again following correct starting procedures.
(

P. 186)

●

There may be a malfunction in the engine immobilizer system. (

P. 76)

One of the following may be the cause of the problem:

●

The battery terminal connections may be loose or corroded.

●

The battery may be discharged. (

P. 575)

The engine starting system may be malfunctioning due to an electrical problem
such as electronic key battery depletion or a blown fuse. However, an interim
measure is available to start the engine. (

P. 571)

If the engine will not start

If the engine will not start even though correct starting procedures are being
followed (

P. 186), consider each of the following points:

The engine will not start even though the starter motor operates nor-
mally.

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

The starter motor does not turn over

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One of the following may be the cause of the problem:

●

One or both of the battery terminals may be disconnected.

●

The battery may be discharged. (

P. 575)

●

There may be a malfunction in the steering lock system.

Contact your Lexus dealer if the problem cannot be repaired, or if repair procedures

are unknown.

When the engine does not start, the following steps can be used as an interim
measure to start the engine if the engine switch is functioning normally:

Set the parking brake.
Shift the shift lever to P.
Turn the engine switch to ACCESSORY mode.
Press and hold the engine switch for about 15 seconds while depressing the
brake pedal firmly.

Even if the engine can be started using the above steps, the system may be mal-
functioning. Have the vehicle inspected by your Lexus dealer.

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

Emergency start function

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8-2. Steps to take in an emergency

IS350 AWD/IS350/IS300 AWD/IS300_U

■

Doors
Use the mechanical key (

P. 119) in

order to perform the following oper-
ations:

Locks all the doors
Closes the windows and moon
roof (turn and hold)

Unlocks the door

Turning the key rearward unlocks the

driver’s door. Turning the key once

again within 5 seconds unlocks the

other doors.

Opens the windows and moon roof (turn and hold)

: This setting must be customized at your Lexus dealer.

■

Trunk
Turn the mechanical key clockwise
to open. (

P. 79)

If the electronic key does not operate properly

If communication between the electronic key and vehicle is interrupted (

P.

137) or the electronic key cannot be used because the battery is depleted, the
smart access system with push-button start and wireless remote control can-
not be used. In such cases, the doors and trunk can be opened and the engine
can be started by following the procedure below.

Locking and unlocking the doors, unlocking the trunk and key linked
functions

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IS350 AWD/IS350/IS300 AWD/IS300_U

Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of the
electronic key to the engine switch.

When the electronic key is detected, a

buzzer sounds and the engine switch

will turn to IGNITION ON mode.
When the smart access system with

push-button start is deactivated in cus-

tomization setting, the engine switch will

turn to ACCESSORY mode.

Firmly depress the brake pedal and check that

is shown on the multi-

information display.
Press the engine switch.

In the event that the engine still cannot be started, contact your Lexus dealer.

Starting the engine

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8-2. Steps to take in an emergency

IS350 AWD/IS350/IS300 AWD/IS300_U

■

Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when stopping

the engine.

■

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. (

P. 502)

■

Changing engine switch modes
Release the brake pedal and press the engine switch in step above.

The engine does not start and modes will be changed each time the switch is pressed.

(

P. 187)

■

When the electronic key does not work properly

●

Make sure that the smart access system with push-button start has not been deacti-

vated in the customization setting. If it is off, turn the function on.

(Customizable features:

P. 613)

●

Check if battery-saving mode is set. If it is set, cancel the function. (

P. 136)

WARNING

■

When using the mechanical key and operating the power windows or moon roof
Operate the power window or moon roof after checking to make sure that there is no

possibility of any passenger having any of their body parts caught in the window or

moon roof.

Also, do not allow children to operate the mechanical key. It is possible for children and

other passengers to get caught in the power window or moon roof.

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8-2. Steps to take in an emergency

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IS350 AWD/IS350/IS300 AWD/IS300_U

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.

Confirm that the electronic key is
being carried.

When connecting the jumper (or

booster) cables, depending on the situa-

tion, the alarm may activate and doors

locked. (



P. 79)

Open the hood (

P. 470)

If the vehicle battery is discharged

The following procedures may be used to start the engine if the vehicle’s bat-
tery is discharged.
You can also call your Lexus dealer or a qualified repair shop.

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8-2. Steps to take in an emergency

IS350 AWD/IS350/IS300 AWD/IS300_U

Connect the jumper cables according to the following procedure:



IS350 AWD/IS350/IS300 AWD



IS300

Connect a positive jumper cable clamp to the positive (+) battery terminal
on your vehicle.
Connect the clamp on the other end of the positive cable to the positive (+)
battery terminal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery terminal on the
second vehicle.
Connect the clamp at the other end of the negative cable to a solid, station-
ary, unpainted metallic point away from the battery and any moving parts,
as shown in the illustration.

Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximately 5 minutes to recharge the battery of
your vehicle.
Open and close any of the doors of your vehicle with the engine switch off.

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Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
Once the vehicle’s engine has started, remove the jumper cables in the exact
reverse order from which they were connected.

Once the engine starts, have the vehicle inspected at your Lexus dealer as soon
as possible.

■

Starting the engine when the battery is discharged
The engine cannot be started by push-starting.

■

To prevent battery discharge

●

Turn off the headlights and the audio system while the engine 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 battery
The electricity stored in the battery will discharge gradually even when the vehicle is not

in use, due to natural discharge and the draining effects of certain electrical appliances. If

the vehicle is left for a long time, the battery may discharge, and the engine may be

unable to start. (The battery recharges automatically during driving.)

■

When recharging or replacing the battery

●

In some cases, it may not be possible to unlock the doors using the smart access system

with push-button start when the battery is discharged. Use the wireless remote control

or the mechanical key to lock or unlock the doors.

●

The engine may not start on the first attempt after the battery has recharged but will

start normally after the second attempt. This is not a malfunction.

●

The engine switch mode is memorized by the vehicle. When the battery is recon-

nected, the system will return to the mode it was in before the battery was discharged.

Before disconnecting the battery, turn the engine switch off.

If you are unsure what mode the engine switch was in before the battery discharged, be

especially careful when reconnecting the battery.

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8-2. Steps to take in an emergency

IS350 AWD/IS350/IS300 AWD/IS300_U

WARNING

■

Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable gas

that may be emitted from the battery:

●

Make sure each jumper cable is connected to the correct terminal and that it is not

unintentionally in contact with any other than the intended terminal.

●

Do not allow the other end of the jumper cable connected to the “+” terminal 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 - clamps of the jumper cables to come into contact with each

other.

●

Do not smoke, use matches, cigarette lighters or allow open flame near the battery.

■

Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while related parts

contain lead and lead compounds. Observe the following precautions when handling

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 vehicle body.

●

Do not lean over the battery.

●

In the event that 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 bat-

tery-related parts.

●

Do not allow children near the battery.

NOTICE

■

When handling jumper cables
When connecting the jumper cables, ensure that they do not become entangled in the

cooling fans or engine drive belt.

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IS350 AWD/IS350/IS300 AWD/IS300_U

●

The needle of the engine coolant temperature gauge (

P. 89) enters the red

zone or a loss of engine power is experienced. (For example, the vehicle
speed does not increase.)

●

“Engine Coolant Temp High Stop in a Safe Place See Owner’s Manual” is
shown on the multi-information display.

●

Steam comes out from under the hood.

Stop the vehicle in a safe place and turn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down
sufficiently, inspect the hoses and
radiator core (radiator) for any
leaks.

Radiator
Cooling fans

If a large amount of coolant leaks,

immediately contact your Lexus

dealer.

If your vehicle overheats

The following may indicate that your vehicle is overheating.

Correction procedures

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8-2. Steps to take in an emergency

IS350 AWD/IS350/IS300 AWD/IS300_U

Engine coolant reservoir:

The coolant level is satisfactory if it is between the “FULL” and “LOW” lines on
the reservoir.

Reservoir cap
“FULL” line
“LOW” line

Intercooler coolant reservoir (IS300):

The coolant level is satisfactory if it is between the “F” and “L” lines on the reser-
voir.

Reservoir cap
“F” line
“L” line



IS350 AWD/IS350/IS300 AWD



IS300

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Add coolant if necessary.

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

Start the engine and turn the air conditioning system on to check that the radi-
ator 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 system on and off repeatedly.

(The fans may not operate in freezing temperatures.)

If the fans are not operating:
Stop the engine immediately and contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
Check if “Engine Coolant Temp High Stop in a Safe Place See Owner’s Man-
ual” is shown on the multi-information display.
If the message does not disappear:
Stop the engine and contact your Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Lexus dealer.



Engine (IS350 AWD/IS350/
IS300 AWD)



Engine (IS300)



Intercooler (IS300)

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8-2. Steps to take in an emergency

IS350 AWD/IS350/IS300 AWD/IS300_U

WARNING

■

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.

●

Keep hands and clothing (especially a tie, a scarf or a muffler) away from the fans and

belts. Failure to do so may cause the hands or clothing to be caught, resulting in seri-

ous injury.

NOTICE

■

When adding engine coolant
Add coolant slowly after the engine has cooled down sufficiently. Adding cool coolant

to a hot engine too quickly can cause damage to the engine.

■

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 additive.

●

IS350 AWD/IS350/IS300 AWD: Do not

loosen the coolant inlet cap or coolant reser-

voir cap while the engine and radiator are hot.

(The coolant inlet cap is located under the

engine cover.)

High temperature steam or coolant could

spray out.

●

IS300: Do not loosen the coolant inlet cap,

coolant reservoir cap, or intercooler reser-

voir cap while the engine and radiator are hot.

High temperature steam or coolant could

spray out.

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8-2. Steps to take in an emergency

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Stop the engine. Set the parking brake and shift the shift lever to P.
Remove the mud, snow or sand from around the rear wheels.
Place wood, stones or some other material under the rear wheels to help pro-
vide traction.
Restart the engine.
Shift the shift lever to D or R and release the parking brake. Then, while exer-
cising caution, depress the accelerator pedal.

■

When it is difficult to free the vehicle

If the vehicle becomes stuck

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

Press

to turn off TRAC.

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