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LEXUS GS 300 (2019 year). Instruction - part 32

504

7-2. Steps to take in an emergency

If the electronic key does not operate properly

■

Doors
Use the mechanical key (

P. 139)

in order to perform the following
operations:

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.

If communication between the electronic key and vehicle is interrupted
(

P. 158) 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 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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7-2. Steps to take in an emergency

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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 customization

setting, the engine switch will turn to ACCESSORY mode.

Firmly depress the brake pedal and check that

and a message (GS F

only) are 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



GS350/GS300



GS F

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7-2. Steps to take in an emergency

■

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. 412)

■

Alarm
If the trunk is opened using the mechanical key when the alarm system is set, the alarm

may be triggered. (

P. 79)

■

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. 204)

■

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. 549)

●

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

P. 157)

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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7-2. Steps to take in an emergency

If the vehicle battery is discharged

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 situation, the

alarm may activate and doors locked. (

P. 80)

Open the hood. (

P. 375)

GS300/GS F: Remove the engine cover.

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.



GS350/GS300



GS F

2
3



GS300



GS F

Raise the front of the engine cover to
remove the front clips, and then raise
the rear of the engine cover to
remove the rear clips.

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7-2. Steps to take in an emergency

Connect the jumper cables according to the following procedure:



GS350



GS300

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7-2. Steps to take in an emergency

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

GS F

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.
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 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.

6
7

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7-2. Steps to take in an emergency

■

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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7-2. Steps to take in an emergency

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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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7-2. Steps to take in an emergency

If your vehicle overheats

●

The needle of the engine coolant temperature gauge (

P. 92, 98) 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 is coming 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 cooling
core (radiator) for any 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.

Correction procedures

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7-2. Steps to take in an emergency

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

Engine coolant reservoir
“FULL”/“F”
“LOW”/“L”
Coolant inlet cap
Intercooler coolant reservoir

2
3
4
5



GS350



GS F



GS300

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7-2. Steps to take in an emergency

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.



GS350



GS F



GS300

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7-2. Steps to take in an emergency

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■

When adding engine coolant (GS350/GS300)
Add coolant in accordance with the following procedure.

Remove caps A and B.
Add engine coolant through the inlet of cap A up to the “[AR/GR] B” line, and then

install cap A.
Add engine coolant through the inlet of cap B until it is full, and then install cap B.
GS300 only: When installing cap B, apply coolant to the O-ring on the end of cap B.

Cap A
Cap B
“[AR/GR] B” line (Target fill line)

GS350

GS300

2
3

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7-2. Steps to take in an emergency

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.

●

GS350: Do not loosen the coolant inlet cap

or the engine coolant reservoir cap while the

engine and radiator are hot.

High temperature steam or coolant could

spray out.

●

GS F: Do not loosen the engine coolant res-

ervoir cap while the engine and radiator are

hot.

High temperature steam or coolant could

spray out.

●

GS300: Do not loosen the coolant inlet cap,

the engine coolant reservoir cap or the inter-

cooler coolant reservoir cap while the engine

and radiator are hot.

High temperature steam or coolant could

spray out.

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7-2. Steps to take in an emergency

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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.

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7-2. Steps to take in an emergency

If the vehicle becomes stuck

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

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

Press

to turn off TRAC. (

P. 298)



GS350/GS300

2
3

4
5

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7-2. Steps to take in an emergency

When trouble

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

GS F

WARNING

■

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 acci-

dent resulting in death or serious injury.

NOTICE

■

To avoid damaging the transmission and other components

●

Avoid spinning the rear wheels and depressing the accelerator pedal more than nec-

essary.

●

If the vehicle remains stuck even after these procedures are performed, the vehicle

may require towing to be freed.

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