2015 LEXUS RX350 Owners Manual

5
When trouble arises
7855-2. Steps to take in an emergency
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 other 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 while it 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 greate r than that required to replace the tire.●
Use a jack stand if it is necessary to get under the vehicle.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured.

7865-2. Steps to take in an emergency
CAUTION■
Replacing a flat tire ●
Observe the following precautions.
Failure to do so may result in serious injury:
• Do not touch the disc wheels or the ar ea around the brakes immediately after
the vehicle has been driven.
After the vehicle has been driven the disc wheels and the area around the
brakes will be extremely hot. Touching these areas with hands, feet or other
body parts while changing a tire, etc. may result in burns.
• Do not attach a heavily damaged wheel ornament, as it may fly off the wheel
while the vehicle is moving.●
Failure to follow these precautions could cause the wheel nuts to loosen and the
tire to fall off, resulting in death or serious injury.
• Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the wheel nuts to be excessively tightened, leading
to bolt or disc wheel damage. In addition, the oil or grease can cause the
wheel nuts to loosen and the wheel may fall off, causing a serious accident.
Remove any oil or grease from the wheel bolts or wheel nuts.
• Have the wheel nuts tightened with a to rque wrench to 76 ft•lbf (103 N•m,
10.5 kgf•m) as soon as possible after changing wheels.
• When installing a tire, only use whee l nuts that have been specifically
designed for that wheel.
• If there are any cracks or deformations in the bolt screws, nut threads or bolt
holes of the wheel, have the vehicle inspected by your Lexus dealer.■
Replacing a flat tire for ve hicles with power back door
In cases such as when replacing tires, make sure to turn off the power back door
main switch (  P. 58). Failure to do so may cause the back door to operate unin-
tentionally if the power back door switch is accidentally touched, resulting in hands
and fingers being caught and injured.

5
When trouble arises
7875-2. Steps to take in an emergency
CAUTION■
When using the compact spare tire ●
Remember that the compact spare tire prov ided 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 tire simultaneously.●
Replace the compact spare tire with a standard tire as soon as possible.●
Avoid sudden acceleration, abrupt steeri ng, sudden braking and shifting opera-
tions 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: ●
ABS & Brake assist●
VSC●
Enhanced VSC (if equipped)●
TRAC●
VDIM (if equipped)●
Intuitive parking assist (if equipped)●
Navigation system (if equipped)●
Cruise control (if equipped)●
Dynamic radar cruise control (if equipped)●
Pre-Collision System (if equipped)
Also, not only can the following system not be utilized fully, but it may even nega-
tively affect the drive-train components: ●
AWD system (if equipped)
■
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.

7885-2. Steps to take in an emergency
NOTICE■
Do not drive the vehicle with a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel
beyond repair.■
Be careful when driving over bumps with the compact spare tire installed on the
vehicle.
The vehicle becomes lower when driving with the compact spare tire compared to
when driving with standard tires. Be careful when driving over uneven road sur-
faces.■
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, tire s or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and trans-
mitter may be damaged if not handled correctly.■
To avoid damage to the tire pressure warning valves and transmitters
When a tire is repaired with liquid seal ants, the tire pressure warning valve and
transmitter may not operate properly. If a liquid sealant is used, contact your Lexus
dealer or other qualified service shop as so on as possible. Make sure to replace the
tire pressure warning valve and transmitter when replacing the tire. (  P. 685)

5
When trouble arises
7895-2. Steps to take in an emergency
If the engine will not start If the engine will not start even though correct starting procedures are
being followed (
 P. 165), consider each of the following points.
■ The engine will not start, even th ough the starter motor operates
normally.
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 proce-
dures. (  P. 165)
● There may be a malfunction in the engine immobilizer system.
(  P. 1 1 0 )
■ The starter motor turns over slow ly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low vol-
ume.
One of the following may be the cause of the problem:
● The battery may be discharged. (  P. 7 9 6 )
● The battery terminal connections may be loose or corroded.
■ The starter motor does not turn over.
The engine starting system may be malfunctioning due to an electri-
cal problem such as an open ci rcuit or a blown fuse. However, an
interim measure is available to start the engine. (  P. 790)

7905-2. Steps to take in an emergency
Emergency start function
When the engine does no t start, the following s teps can be used as an
interim measure to start the engine if the “ENGINE START STOP” switch
is functioning normally:
Set the parking brake.
Shift the shift lever to P.
Turn the “ENGINE START STOP” switch to ACCESSORY
mode.
Press and hold the “ENGINE START STOP” switch for about 15
seconds while depressing the brake pedal firmly.
Even if the engine can be started using the above step s, the system may
be malfunctioning. Have the vehicl e inspected by your Lexus dealer.■ The starter motor does not turn over, the interior lights and head-
lights do not turn on, or the horn does not sound.
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. 7 9 6 )
● 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.
STEP 1
STEP 2
STEP 3
STEP 4

5
When trouble arises
7915-2. Steps to take in an emergency
If the shift lever cannot be shifted from P If the shift lever cannot be shifted with your foot on the brake pedal, there
may be a problem with the shift lock system (a system to prevent accidental
operation of the shift lever). Have the vehicle inspected by your Lexus
dealer immediately.
The following steps may be used as an emergency measure to ensure that
the shift lever can be shifted:
Set the parking brake.
Turn the “ENGINE START STOP” switch to ACCESSORY
mode.
Depress the brake pedal.
Pry the cover up with a flathead
screwdriver or equivalent.
Press the shift lock override but-
ton. The shift lever can be shifted
while the button is pressed.STEP 1
STEP 2
STEP 3
STEP 4
STEP 5

7925-2. Steps to take in an emergency
If you lose your keys New genuine Lexus keys can be made by your Lexus dealer using the other
keys and the key number stamped on your key number plate.