engine LEXUS RX350 2015 Owners Manual

7705-2. Steps to take in an emergency
Sounds
once 
(Flashes) •When the doors
were unlocked
with the
mechanical key
and then the
“ENGINE
START STOP”
switch 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
START STOP”
switch was
pressed two
consecutive
times. Touch the elec-
tronic key to the
“ENGINE START
STOP” switch
while depressing
the brake pedal.
Sounds
once 
(Flashes) An attempt was
made to start the
engine with the
shift lever in an
incorrect position. Shift the shift lever
to P and start the
engine.Interior
buzzer Exterior
buzzer Wa r n i n g m e s s a g e Details Correction
procedure

5
When trouble arises
7715-2. Steps to take in an emergency
Sounds
once 
(Flashes) An attempt was
made to turn the
“ENGINE START
STOP” switch off
when the shift
lever was not in P. To turn off the
engine, first shift
the shift lever to P
and then turn the
“ENGINE START
STOP” switch off.
  Po w e r w a s t u r n e d
off due to the
automatic power
off function. Next time when
starting the
engine, increase
the engine speed
slightly and main-
tain that level for
approximately 5
minutes to
recharge the bat-
tery.
Sounds
once  The electronic key
has a low battery. Replace the elec-
tronic key battery.
(  P. 7 0 1 )Interior
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buzzer Wa r n i n g m e s s a g e Details Correction
procedure

7725-2. Steps to take in an emergency
Sounds
once 
(Flashes) The driver's door
was opened and
closed with the
“ENGINE START
STOP” switch
turned off and
then the
“ENGINE START
STOP” switch was
put in ACCES-
SORY mode
twice without the
engine being
started. Press the
“ENGINE START
STOP” switch
while depressing
the brake pedal.
During an engine
starting proce-
dure in the event
that the elec-
tronic key was not
functioning prop-
erly (  P. 7 9 4 ) ,
the “ENGINE
START STOP”
switch was
touched with the
electronic key. Press the
“ENGINE START
STOP” switch
within 10 seconds
of the buzzer
sounding.Interior
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procedure

5
When trouble arises
7735-2. Steps to take in an emergency
Sounds
once 
(Flashes) The steering lock
could not be
released within 3
seconds of the
“ENGINE START
STOP” switch
being pressed. Press the
“ENGINE START
STOP” switch
while depressing
the brake pedal
and moving the
steering wheel left
and right.■
Warning message in radar cruise mode (if equipped)
In the following cases, the warning message may not be displayed even if vehicle-
to-vehicle distance decreases: ●
When your vehicle and the vehicle ahead are traveling at the same speed or the
vehicle ahead is traveling more quickly than your vehicle●
When the vehicle ahead is traveling at a very low speed●
Immediately after cruise control speed is set●
At the instant the accelerator pedal is depressedInterior
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buzzer Wa r n i n g m e s s a g e Details Correction
procedure

7745-2. Steps to take in an emergency
If you have a flat tire Your vehicle is equipped with a spare ti re. The flat tire can be replaced with
the spare tire.
■ Before jacking up the vehicle
● Stop the vehicle on a hard, flat surface.
● Set the parking brake.
● Shift the shift lever to P.
● Stop the engine.
● Turn on the emergency flashers.

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.

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.

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