2011 LEXUS RX350 engine

5

When trouble arises
531
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
nVisible symptoms
lFluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
lFlat-looking tires or uneven tire wear
lEngine coolant temperature gauge needle continually points
higher than normal.
nAudible symptoms
lChanges in exhaust sound
lExcessive tire squeal when cornering
lStrange noises related to the suspension system
lPinging or other noises related to the engine
nOperational symptoms
lEngine missing, stumbling or running rough
lAppreciable loss of power
lVehicle pulls heavily to one side when braking
lVehicle pulls heavily to one side when driving on a level road
lLoss of brake effectiveness, spongy feeling, pedal almost touches
the floor

532
5-1. Essential information
Fuel pump shut off system
Follow the procedure below to restart the engine after the system is acti-
vated.
Turn the “ENGINE START STOP” switch to ACCESSORY mode
or turn it off.
Restart the engine.
NOTICE
nBefore starting the engine
Inspect the ground under the vehicle.
If you find that fuel has leaked onto the ground, the fuel system has been damaged
and is in need of repair. Do not restart the engine.
To minimize the risk of fuel leakage when the engine stalls or when an air-
bag inflates upon collision, the fuel pump shut off system stops the supply of
fuel to the engine.
STEP1
STEP2

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When trouble arises
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5-1. Essential information
Event data recorder
In a crash or a near crash event
The SRS airbag sensor assembly contains the EDR. In a crash or near
crash event, this device may record some or all of the following informa-
tion:
lEngine speed
lWhether the brake pedal was applied or not
lVehicle speed
lTo what extent the accelerator pedal was depressed
lPosition of the transmission shift lever
lWhether the driver and front passenger wore seat belts or not
lDriver's seat position
lSRS airbag deployment data
lSRS airbag system diagnostic data
lFront passenger’s occupant classification
The information above is intended to be used for the purpose of improv-
ing vehicle safety performance. Unlike general data recorders, the EDR
does not record sound data such as conversation between passengers.
Your vehicle has computers that monitor and control certain aspects of
your vehicle. These computers assist in driving and maintaining optimal
vehicle performance.
Besides storing data useful for troubleshooting, there is an event data
recorder (EDR) that records data in a crash or near crash event.

5

When trouble arises
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5-2. Steps to take in an emergency
nIf 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.)
lIf tires not equipped with tire pressure warning valves and transmitters are used
lIf the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer
lIf the tire pressure warning select switch is set to a different tire setting.
lIf 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.)
lIf electronic devices or facilities using similar radio wave frequencies are nearby
lIf a radio set at similar frequencies is in use in the vehicle
lIf a window tint that affects the radio wave signals is installed
lIf there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings
lIf 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.)
lIf tire chains are used
lIf the full-size spare tire is in a location subject to poor radio wave signal recep-
tion.
lIf a large metallic object which can interfere with signal reception is put in the
luggage compartment (vehicles with full-size spare tire).
nIf 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 “ENGINE START STOP” switch is turned to IGNITION ON mode, have
it checked by your Lexus dealer.
nCustomization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features →P. 6 2 1 )

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5-2. Steps to take in an emergency
Stop the vehicle immediately.
A buzzer sounds and a warning message is shown on the multi-informa-
tion 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.
Wa r n i n g m e s s a g eDetails
(U.S.A.)
(Canada)
Indicates abnormal engine oil pressure
The warning light may come on if the engine oil pres-
sure is too low.
(Flashes)
(If equipped)
Indicates the AWD system has overheated

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5-2. Steps to take in an emergency
Indicates that the back
door is not fully closed
If the vehicle reaches a
speed of 3 mph
(5 km/h), a buzzer
sounds to indicate that
the back door is not yet
fully closed.
Close the back door.
(Flashes)
(If equipped)
Indicates that the moon
roof is not fully closed
(with the “ENGINE
START STOP” switch off,
and the driver's door
open)
Close the moon roof.
Indicates that the parking
brake is still engaged
If the vehicle reaches a
speed of 3 mph
(5 km/h),
flashes and a buzzer
sounds to indicate that
the parking brake is still
engaged.
Release the parking
brake.
Indicates that the washer
fluid level is lowAdd washer fluid.
Wa r n i n g m e s s a g eDetailsCorrection procedure

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When trouble arises
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5-2. Steps to take in an emergency
(U.S.A. only)
Indicates that the engine
oil is scheduled to be
changed
Check the engine oil, and
change if necessary.
Comes on approximately
4500 miles (7200 km)
after the engine oil is
changed. (The indicator
will not work properly
unless the oil mainte-
nance data has been
reset.)
(U.S.A. only)
Indicates that the engine
oil and oil filter should be
changed
Have the engine oil and oil
filter checked and
changed by your Lexus
dealer.
(Flashes)
(If equipped)
Indicates that the AWD
system is not currently
functional
A buzzer also sounds.
Reduce vehicle speed or
stop the vehicle in a safe
place until the warnings
clear.
In this case, do not stop
the engine.
(If equipped)
Indicates that the pre-
collision system is not
currently functional
Clean the grille and the
sensor.
This message appears
when the pre-collision
system is hot. In this case,
wait until the system
cools down.
Wa r n i n g m e s s a g eDetailsCorrection procedure

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When trouble arises
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5-2. Steps to take in an emergency
Indicates that the engine
has overheated
A buzzer also sounds.
Stop and check.
(→P. 5 8 7 )
Indicates that remaining
fuel is approximately 2.8
gal. (10.7 L, 2.4 Imp. gal.)
or less
Refuel the vehicle.
Wa r n i n g m e s s a g eDetailsCorrection procedure