coolant temperature LEXUS RC300 2017 User Guide

5768-2. Steps to take in an emergency
RC200t only
Indicates an engine malfunctionA buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupa nt classification system; or
• The seat belt pretensioner system A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in:
• The ABS; or
• The brake assist system
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.
→ P. 630
(If equipped)
Indicates that the radar sensor is dirty or covered with
ice
A buzzer also sounds.
→ Clean the sensor.
Warning messageDetails/Actions
(U.S.A.) (Canada)

6308-2. Steps to take in an emergency
●The engine coolant temperature gauge (→P. 96, 102) is in the red zone or a
loss of engine power is experienced. (For example, the vehicle speed does not
increase.)
●“Engine Coolant High Temperature” is shown on the multi-information dis-
play.
●Steam comes out from under the hood.
Stop the vehicle in a safe place and tu rn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
1
2

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.

708Alphabetical index
Engine ....................................................... 643ACCESSORY mode..................... 208
Compartment....................................... 501
Engine switch .......................................207
Hood ........................................................ 497
How to start the engine ..................207
Identification number .......................642
If the engine will not start............... 620
Ignition switch (engine switch)....207
Overheating ........................................ 630
Engine coolant.......................................509 Capacity ................................................ 648
Checking............................................... 509
Preparing and checking before winter ..................................... 331
Engine coolant temperature gauge .............................................. 96, 102
Engine immobilizer system ..................79
Engine oil ................................................. 504 Capacity .................................................644
Checking............................................... 504
Preparing and checking before winter ..................................... 331
Engine oil maintenance data ........... 507
Engine oil temperature gauge ......... 102
Engine switch ......................................... 207
Enhanced VSC ..................................... 298
EPS (Electric Power Steering) ....... 299 Warning light ...................................... 566
Event data recorder (EDR) ...................10
Expert mode ........................................... 302 First-aid kit storage belt..................... 454
Flat tire
Vehicles with a spare tire .............. 592
Vehicles with emergency tire puncture repair kit ........................ 606
Floor mats................................................... 30
Fluid Automatic transmission .................. 649
Brake..........................................................651
Washer .....................................................516
Fog lights...................................................232 Replacing light bulbs ...................... 550
Switch ...................................................... 232
Footwell light .......................................... 448 Wattage ................................................. 657
Front fog lights........................................232 Replacing light bulbs ...................... 550
Switch ...................................................... 232
Front passenger occupant classification system ............................. 51
Front seats ................................................. 164 Adjustment..............................................164
Cleaning.................................................485
Correct driving posture .....................32
Driving position memory.................169
Head restraints ..................................... 173
Jam protection function....................165
Seat heaters .......................................... 446
Seat position memory .......................169
Seat ventilators.................................... 447F