LEXUS GX 460 (2019 year). Manual - part 35

When trouble

CAUTION

■

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.

NOTICE

■

When stowing the flat tire
Ensure that there is no object caught between the tire and the vehicle underbody.

554

If the engine will not start

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. 193)

●

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

P. 77)

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

●

The battery may be discharged. (

P. 559)

●

The battery terminal connections may be loose or corroded.

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

P. 555)

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

P. 193), consider each of the following points:

The engine will not start even when 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.

555

When trouble

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. 559)

●

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.
Put the shift lever in P.
Set the engine switch to the ACCESSORY mode.
Push 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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If the electronic key does not operate properly

Use the mechanical key (

P. 99) in

order to perform the following opera-
tions (driver’s door only):

Locks all the doors
Closes the windows and moon roof

(turn and hold)
Unlocks the doors

Turning the key rearward unlocks the

driver’s door. Turning the key once again

unlocks the other doors.

Opens the windows and moon roof

(turn and hold)

: These settings must be customized at your Lexus dealer.

If communication between the electronic key and vehicle is interrupted
(

P. 121) 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 engine can be started by following the procedure below.

Locking and unlocking the doors and key linked functions

557

When trouble

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.

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.

Press the engine switch within 10 seconds of the buzzer sounding, keeping the
brake pedal depressed.

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

■

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. 489)

■

Changing engine switch modes
Within 10 seconds of the buzzer sounding, release the brake pedal and press the engine

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

(

P. 194)

■

When the electronic key does not work properly
Make sure that the smart access system with push-button start has not been deactivated

in the customization setting. If it is off, turn the function on.
(Customizable features:

P. 592)

Starting the engine

558

CAUTION

■

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.

559

When trouble

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 Lexus 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 the

doors locked. (

P. 80)

Open the hood. (

P. 460)

Connecting the jumper cables according to the following procedure:

Positive (+) battery terminal on your vehicle.
Positive (+) battery terminal on the second vehicle.
Negative (-) battery terminal on the second vehicle.
Connect the jumper cable to ground on your vehicle as shown in the illus-
tration.

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

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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 your vehicle’s engine has started, remove the jumper cables in the exact
reverse order in which they were connected.

Once the engine starts, have the vehicle checked 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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When trouble

CAUTION

■

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 the 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 + 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 belt.

562

If your vehicle overheats

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.

The following may indicate that your vehicle is overheating.

●

The needle of the engine coolant temperature gauge (

P. 87) enters the

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

●

Steam is coming from under the hood.

Correction procedures

563

When trouble

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

Reservoir
“F”
“L”
Radiator cap

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.

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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.

●

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.

●

Do not loosen the radiator cap or the coolant reservoir cap while the engine and radi-

ator are hot. High temperature steam or coolant could spray out.

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.

565

When trouble

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 stuck tire.
Place wood, stones or some other material under the tires to help provide
traction.
Restart the engine.
Lock the center differential. (

P. 347)

Shift the shift lever to the D or R position and release the parking brake. Then,
while exercising caution, depress the accelerator pedal.

■

When it is difficult to free the vehicle
Turn off TRAC or Active TRAC/VSC/Trailer Sway Control if these functions are ham-

pering your attempts to free the vehicle. (

P. 357)

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

Press to turn off TRAC or Active TRAC/VSC/

Trailer Sway Control.

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