ECU Lexus GX460 2019 / LEXUS 2019 GX460 (OM60Q84U) Manual PDF

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GX460_OM_OM60Q84U_(U)
7
When trouble arises
7-1. Essential information
If your vehicle has to be stopped in an emergency
Steadily step on the brake pedal with both feet and firmly depress it.
Do not pump the brake pedal repeatedly as this will increase the effort required to
slow the vehicle.
Shift the shift lever to N.
If the shift lever is shifted to N
After slowing down, stop the vehicle in a safe place by the road.
Stop the engine.
If the shift lever cannot be shifted to N
Keep depressing the brake pedal with both feet to reduce vehicle speed as
much as possible.
To stop the engine, press and hold
the engine switch for 2 consecutive
seconds or more, or press it briefly 3
times or more in succession.
Stop the vehicle in a safe place by the road.
Only in an emergency, such as if it becomes impossible to stop the vehicle in
the normal way, stop the vehicl e using the following procedure:
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2
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4
3
Press and hold for 2 seconds or more,
or press briefly 3 times or more
4
CAUTION
■If the engine has to be turned off while driving
Power assist for the brakes and steering wheel will be lost, making the brake pedal
harder to depress and the steering wheel heav ier to turn. Decelerate as much as possi-
ble before turning off the engine.
5

5127-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
If your vehicle is transported by a flat-
bed truck, it should be tied down at the
locations shown in the illustration.
If you use cables or chains to tie down
your vehicle, the angles shaded in black
must be 45.
Do not overly tighten the tie downs or
the vehicle may be damaged.
If a tow truck is not available in an em ergency, your vehicle may be temporarily
towed using an elastic towing rope secu red to the emergency towing hooks. This
should only be attempted on hard surf aced roads for at most 50 miles (80 km)
at under 18 mph (30 km/h).
A driver must be in the vehicle to st eer and operate the brakes. The vehicle’s
wheels, drive train, axles, steering an d brakes must be in good condition.
Using a flatbed truck
Emergency towing

5137-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
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When trouble arises
Securely attach an elastic towing
rope to the towing hooks.
Take care not to damage the vehicle
body.
Enter the vehicle being towed and start the engine.
If the engine does not start, turn th e engine switch to IGNITION ON mode.
Set the four-wheel drive control switch in H4 and push the center differential
lock/unlock switch to unlock the center differential. (P. 346)
For models with the rear height cont rol air suspension: Change the vehicle
height to N (normal) mode and end th e vehicle height control operation.
( P. 341)
Shift the shift lever to N and release the parking brake.
When the shift lever cannot be shifted: P. 202
■While towing
If the engine is not running, the power assist for the brakes and steering will not function,
making steering and br aking more difficult.
Emergency towing procedure
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5157-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
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When trouble arises
NOTICE
■To avoid serious damage to your vehicle
■To prevent damage to the vehicle when towing using a wheel-lift type truck
●Do not tow the vehicle from the rear when the engine switch is off. The steering lock
mechanism is not strong enough to hold the front wheels straight.
●When raising the vehicle, ensure adequate ground cleara nce for towing at the oppo-
site end of the raised vehicle. Without ad equate clearance, the vehicle could be dam-
aged while being towed.
■To prevent damage to the vehicle wh en towing with a sling-type truck
Do not tow with a sling-type truck, either from the front or rear.
■To prevent damage to the vehi cle during emergency towing
●Do not use cables or chains.
●Do not secure the elastic towing rope to the suspension components.
Do not use the rear emergency towing hook.

5217-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
7
When trouble arises
*1: Open door warning buzzer:  P. 528
*2:Seat belt reminders:
The driver’s seat belt buzzer sounds to alert the driver that his or her seat belt is not
fastened. Once the engine switch is turned to IGNITION ON mode, the buzzer
sounds for 6 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer
sounds once. If the seat belt is still unfastened after 30 seconds, the buzzer will sound
intermittently for 10 seconds. Then, if the se at belt is still unfastened, the buzzer will
sound in a different tone for 20 more seconds.
The front passenger’s seat belt buzzer soun ds to alert the front passenger that his or
her seat belt is not fastened. The buzzer so unds once if the vehicle reaches a speed of
12 mph (20 km/h). If the seat belt is still unfastened after 30 seconds, the buzzer will
sound intermittently for 10 se conds. Then, if the seat belt is still unfastened, the buzzer
will sound in a different to ne 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, rear side and curtain shield airbag sensors, floor sen-
sor, driver’s seat belt buc kle switch, front passenger occupant classification system (ECU
and sensors), “AIR BAG ON” indicator light, “AIR BAG OFF” indicator light, front pas-
senger’s seat belt buckle sw itch, seat belt pretensioner assemblies, airbags, intercon-
necting wiring and power sources. ( P. 36)
■Front passenger detection sensor, 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 passen-
ger is not sittin g in the seat.
●If a cushion is placed on the seat, the sens or may not detect a passenger, and the warn-
ing light may not operate properly.
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fu el tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after severa l trips, contact your Lexus dealer as soon as
possible.

5377-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
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When trouble arises
Once
• When the doors were unlocked with the mechanical key and then
the engine swit ch was pressed,
the electronic key could not be
detected in the vehicle.
• The electronic key could not be detected in the vehicle even after
the engine switch was pressed
two consecutive times.
 Touch the electronic key to the
engine switch while depressing
the brake pedal.

Power was turned off due to the
automatic power off function.
Next time when starting the
engine, increase the engine
speed slightly and maintain that
level for approximately 5 min-
utes to recharge the battery.
Once
The electronic key has a low battery.
Replace the electronic key bat-
tery. ( P. 489)
Interior
buzzerExteriorbuzzerWarning messageDetails/Actions
(Flashes)

5427-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
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 ot her 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 no t 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 engine 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.
●Be sure to turn off the height control and stop the engine.
Take particular care when lowering the ve hicle to ensure that no one working on or
near the vehicle will be injured.
■Using the jack handle
Tighten all the jack handle bo lts securely using a Phillips-head screwdriver, to prevent
the extension parts from co ming apart unexpectedly.

5527-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
Lay down the tire with the valve stem
facing up and install the holding
bracket, inserting the claw into the
wheel lug nut hole. Turn the jack
handle extension clockwise to take
up slack in the chain.
Then, check to ensure the claw is in the
wheel lug nut hole and the holding
bracket is centered in the wheel hub.
Claw
Holding bracket
Raise the tire.
While raising, pull th e tire towards the
rear of the vehicle, taking care that the
tire goes up without catching on any
surrounding part, to prevent it from fly-
ing forward during a collision or sudden
braking.
After the tire goes half way up, check
that the suspended chain is able to enter
the tire hole, for proper storage.
Tightening torque:
34.4 ft•lbf (46.6 N•m, 4.8 kgf•m)
Confirm that the tire is not loose
after tightening:
Push and pull the tire
Try rotating
Visually check to ensure the tire is
not hung on surrounding parts.
If looseness or misassembly exis ts, repeat step and step .
Repeat step , any time the tire is lowered or disturbed.
Stow the tools and jack securely.
Stowing the flat tire, jack and all tools
incorrect
correct
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2
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5537-2. Steps to take in an emergency
GX460_OM_OM60Q84U_(U)
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When trouble arises
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 possibilit y 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.

GX460_OM_OM60Q84U_(U)
5918-1. Specifications
8
Vehicle specifications
*:Table 1  Occupant loading and distribution for vehicle normal load for various des-
ignated seating capacities
Test rimThe rim on which a tire is fitted for testing, and may be
any rim listed as appropriate for use with that tire
TreadThat portion of a tire that comes into contact with the
road
Tread ribA tread section running circ umferentially around a tire
Tread separationPulling away of the tread from the tire carcass
Treadwear indicators (TWI)
The projections within the principal grooves designed
to give a visual indication of the degrees of wear of the
tread
Wheel-holding fixtureThe fixture used to hold the wheel and tire assembly
securely during testing
Tire related termMeaning
Designated seating capac- ity, Number of occupantsVehicle normal load, Num- ber of occupantsOccupant distribution in a normally loaded vehicle
2 through 422 in front
5 through 1032 in front, 1 in second seat
11 through 1552 in front, 1 in second seat, 1
in third seat, 1 in fourth seat
16 through 207
2 in front, 2 in second seat, 2 in third seat, 1 in fourth seat