radiator LEXUS RC300 2017 User Guide

5117-3. Do-it-yourself maintenance
7
Maintenance and care
Check the radiator, condenser and intercooler radiator and clear away any for-
eign objects.
If any of the above parts are extremely dirt y or you are not sure of their condition,
have your vehicle inspecte d by your Lexus dealer.
WARNING
■When the engine is hot (RC350/RC300/RC200t)
Do not remove the engine coolant reservoir cap, intercooler coolant reservoir cap and
radiator cap. ( →P. 634)
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
■When the engine is hot (RC F)
Do not remove the engine coolant reservoir cap. (→P. 634)
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
NOTICE
■When adding coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water and
antifreeze must be used to provide proper lubrication, corrosion protection and cool-
ing. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent it from damaging parts or paint.
Radiator, condenser and intercooler radiator (if equipped)
WARNING
■When the engine is hot
Do not touch the radiator, condenser or inte rcooler as they may be hot and cause seri-
ous injuries, such as burns.

6318-2. Steps to take in an emergency
8
When trouble arises
After the engine has cooled down sufficiently, inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks, immediately contact your Lexus dealer.
3
1
2
RC350/RC300RC200t
RC F

6338-2. Steps to take in an emergency
8
When trouble arises
Add coolant if necessary.
Water can be used in an emergency if coolant is unavailable.
Start the engine and turn the air conditio ning system on to check that the radi-
ator cooling fans operate and to check for coolant leaks from the radiator or
hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound and air flow.
If it is difficult to check these, turn the air conditioning system on and off repeatedly.
(The fan may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately an d contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
5
Engine (RC350/RC300)Engine (RC200t)
Engine (RC F)Intercooler (RC200t)
6
7

6348-2. Steps to take in an emergency
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the h ood, do not open the hood until the steam
has subsided. The engine compartment may be very hot.
●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 seri-
ous injury.
●RC350/RC300: While the engine and radi-
ator are hot, do not loosen or remove the
coolant reservoir cap or radiator cap. (The
radiator cap is located under the engine
cover.)
High temperature steam or coolant could
spray out.
●RC200t: While the engine and radiators are
hot, do not loosen or remove the coolant res-
ervoir cap, radiator cap, or intercooler cool-
ant reservoir cap.
High temperature steam or coolant could
spray out.
●RC F: While the engine and radiator are hot,
do not loosen or remove the coolant reser-
voir cap.
High temperature steam or coolant could
spray out.

715Alphabetical index
Paddle shift switches ...................215, 216
Parking assist sensors (intuitive parking assist) .................. 269
Parking brake........................................... 221
Parking lights .......................................... 224 Light switch ........................................... 224
Replacing light bulbs ....................... 550
PCS (Pre-Collision System) ............ 306 PCS OFF switch ................................307
Warning light ...................................... 566
Personal lights........................................ 450
Pop-up display ................................ 114, 126
Power outlet ........................................... 456
Power steering (Electric power steering system)................................. 299 Warning light ...................................... 566
Power windows ...................................... 183 Door lock linked window operation ........................... 185
Jam protection function ................... 184
Operation ............................................... 183
Window lock switch.......................... 183
Pre-Collision System (PCS) ............ 306 PCS OFF switch ................................307
Warning light ...................................... 566 Radar cruise control (dynamic
radar cruise control).........................249
Radiator....................................................... 511
Radio ......................................................... 363
Rear seats .................................................. 167 Fold down the seatback................... 167
Luggage security system.................148
Rear turn signal lights ......................... 220 Replacing light bulbs ....................... 547
Turn signal lever ................................. 220
Wattage ................................................. 657
Rear view mirror Inside rear view mirror......................178
Outside rear view mirrors ............. 180
PR
*: For vehicles with a naviga tion system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”.