2015 LEXUS RX350 coolant temperature

1832-1. Driving procedures
2
When driving Selecting gears in the M position
To enter M mode, shift the shift lever to the M position. Gears can then be
selected by operating the shift lever or paddle shift switches, allowing you
to drive in the gear of your choosing.
Upshifting
Downshifting
The gear changes once every time
the shift lever or paddle shift switch
is operated.
When in the M position, the gear will not change unless the shift lever or
paddle shift switches are operated.
However, even when in the M positio n, the gears will be automatically
changed in the following situations:
● When vehicle speed drops (downshift only).
● When the automatic transmission flu id or engine coolant temperature
is low.
● When engine speed is higher than necessary. (upshift only)

1912
When driving 2-2. Instrument cluster
Gauges and meters
Tachometer Displays the engine speed in revolutions per minute
Multi-information display Presents the driver with a variety of driving-related data (  P. 200)
Speedometer Displays the vehicle speed
Fuel gauge Displays the quantity of fuel remaining in the tank
Odometer and trip meter Odometer: Displays the total distance the vehicle has been driven
Trip meter: Displays the distance the vehicle has been driven since the
meter was last reset. Trip meters “A” and “B” can be used to
record and display different distances independently.
Shift position and shift range display
Displays the selected shift position or selected shift range (  P. 171, 178)
Engine coolant temperature gauge
Displays the engine coolant temperature

1932-2. Instrument cluster
2
When driving NOTICE■
To prevent damage to the engine and its components ●
Do not let the indicator needle of the ta chometer enter the red zone, which indi-
cates the maximum engine speed.●
The engine may be overheating if the engine coolant temperature gauge is in the
red zone (H). In this case, immediately stop the vehicle in a safe place, and check
the engine after it has cooled completely. (  P. 7 9 9 )

3172-5. Driving information
2
When driving ● Avoid jerky steering and sharp turns, and slow down before making a
turn.
● Note that when making a turn, the tr ailer wheels will be closer than the
vehicle wheels to the inside of th e turn. Compensate by making a
wider than normal turning radius.
● Slow down before making a turn, in cross winds, on wet or slippery sur-
faces, etc.
Increasing vehicle speed can destabilize the trailer.
● Take care when passing other vehi cles. Passing requires considerable
distance. After passing a vehicle, do not forget the length of your
trailer, and be sure you have plenty of room before changing lanes.
● To maintain engine braking efficiency and charging system perfor-
mance when using engine braking, do not put the transmission in D.
● Instability happens more frequently when descending steep or long
downhill grades. Before descending, slow down and downshift. Do not
make sudden downshifts while descending steep or long downhill
grades.
● Avoid holding the brake pedal down too long or applying the brakes
too frequently. This could cause th e brakes to overheat and result in
reduced braking efficiency.
● Due to the added load of the trailer, your vehicle’s engine may overheat
on hot days (at temperatures over 85°F [30°C]) when driving up a
long or steep grade. If the eng ine coolant temperature gauge indicates
overheating, immediately turn off th e air conditioning (if in use), pull
your vehicle off the road and stop in a safe spot. (  P. 799)

6664-3. Do-it-yourself maintenance
CAUTIONThe engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury,
observe the following precautions: ■
When working on the engine compartment ●
Keep hands, clothing and tools away from the moving fans and engine drive belt.●
Be careful not to touch the engine, radiator , exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot.●
Do not leave anything that may burn easi ly, such as paper and rags, in the engine
compartment.●
Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.●
Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.■
When working near the electric cooling fans or radiator grille
Be sure the “ENGINE START STOP” switch is off.
With the “ENGINE START STOP” switch in IGNITION ON mode, the electric
cooling fans may automatically start to run if the air conditioning is on and/or the
coolant temperature is high. (  P. 6 7 8 )■
Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in your eyes.
NOTICE■
If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear due to
dirt in the air.

6774-3. Do-it-yourself maintenance
4
Maintenance and care Engine coolant
The coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold.
Reservoir cap
“FULL” line
“LOW” line If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line. (  P. 799)
■
Coolant selection
Only use “Toyota Super Long Life Coolant” or a similar high quality ethylene glycol
based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life
hybrid organic acid technology.
U.S.A.: “Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50%
deionized water. (Minimum temperature: -31  F [-35  C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45%
deionized water. (Minimum temperature: -44  F [-42  C])
For more details about coolant, contact your Lexus dealer.

8005-2. Steps to take in an emergency
Add coolant if necessary.
(
 P. 6 7 1 )
Water can be used in an emer-
gency if coolant is unavailable.
Start the engine and turn the air conditioning system on to check
that the radiator cooling fans op erate and to check for coolant
leaks from the radiator or hoses. The fans operate when the air conditio ning system is turned on immedi-
ately after a cold start. Confirm that the fans are operating by checking
the fan sound and air flow. If it is diff icult to check these, turn the air con-
ditioning 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.STEP 5
CAUTION■
To prevent an accident or injury when in specting under the hood of your vehicle●
If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartm ent may be very hot, causing serious
injuries such as burns.●
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 serious injury.
●
Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may resu lt from hot coolant and steam released
under pressure.STEP 6
STEP 7

874Alphabetical index
Engine
Accessory mode ................................ 165
Compartment ..................................... 670
Engine switch........................................ 165
Hood........................................................ 667
How to start the engine................... 165
Identification number.......................807
If the engine will not start ...............789
Ignition switch....................................... 165
Overheating......................................... 799
Engine compartment cover ...............671
Engine coolant
Capacity .................................................... 811
Checking ............................................... 677
Preparing and checking
before winter .................................... 302
Engine coolant temperature
gauge.........................................................191
Engine immobilizer system..................110
Engine oil
Capacity ................................................ 809
Checking ............................................... 674
Preparing and checking
before winter .................................... 302
EPS ............................................................. 269
Event data recorder ............................... 26 Floor mat .................................................. 625
Fluid
Brake ......................................................... 814
Washer................................................... 683
Fog lights
Replacing light bulbs ......................... 719
Switch ........................................................ 215
Wattage ................................................... 817
Footwell light .......................................... 595
Front fog lights
Replacing light bulbs ......................... 719
Switch ........................................................ 215
Wattage ................................................... 817
Front passenger occupant
classification system ...........................132
Front passenger's seat belt
reminder light ......................................747
Front seats
Adjustment .............................................. 68
Driving position memory .................. 76
Flattening seatbacks ............................69
Front side marker lights
Replacing light bulbs ......................... 719
Front turn signal lights
Replacing light bulbs ......................... 719
Wattage ................................................... 817F