2014 Lexus GS350 radiator

636
GS350_OM_OM30D41U_(U)
6-3. Do-it-yourself maintenance
Check the radiator and condenser and clear away any foreign objects.
If either of the above parts is extremely dirty or you are not sure of their
condition, have your vehicle inspected by your Lexus dealer.
Radiator and condenser
CAUTION
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause serious inju-
ries, such as burns.

761
GS350_OM_OM30D41U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If your vehicle overheats
Stop the vehicle in a safe place and turn 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.
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.
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( P. 81) enters
the red zone or a loss of engine power is expe rienced. (For example,
the vehicle speed does not increase.)
●Steam is coming from under the hood.
Correction procedures
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2
3
1
2

7627-2. Steps to take in an emergency
GS350_OM_OM30D41U_(U)The coolant level is satisfactory if
it is between the “FULL” and “LOW”
lines on the reservoir.
Reservoir
“FULL”
“LOW”
Coolant inlet cap
Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
Start the engine and turn the air conditioning system on to check that
the radiator cooling fa ns 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, tu rn the air conditioning 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.
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2
3
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6
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7637-2. Steps to take in an emergency
GS350_OM_OM30D41U_(U)
7
When trouble arises
CAUTION
■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 hood, 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 serious injury.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cooled down sufficiently. Adding cool
coolant to a hot engine too quickly can cause damage to the engine.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust etc.).
●Do not use any coolant additives.
●Do not loosen the cool ant inlet cap or the
coolant reservoir cap while the engine and
radiator are hot.
High temperature steam or coolant could
spray out.

837Alphabetical index
GS350_OM_OM30D41U_(U)
Paddle shift switches ............................ 182
Parking assist sensors (intuitive parking assist) .................. 240
Parking brake.......................................... 188 If the parking brake cannot be released ........................ 752
Operation ...............................................188
Parking brake engaged warning buzzer ................................. 721
Parking brake engaged warning message ............................. 721
Parking lights ............................................192 Light switch ............................................ 192
Replacing light bulbs ....................... 687
Welcome light illumination control ......................... 103
PCS (Pre-Collision System) ............ 279 Function .................................................. 279
PCS OFF switch ................................. 281
Warning light .......................................704
Warning message ........................ 714, 723, 728
Personal lights........................................ 562
Power easy access system .................132
Power outlets ..........................................577
Power steering (Electric Power
Steering system) ................................ 270 Warning light .......................................703
Warning message ............................... 717
Power trunk opener and closer .......123 Power windows....................................... 147
Door lock linked window operation ...........................149
Jam protection function....................148
Operation................................................ 147
Window lock switch .......................... 147
Pre-Collision System (PCS)............. 279 Function .................................................. 279
PCS OFF switch ..................................281
Warning light ....................................... 704
Warning message........................ 714, 723, 728
Radar cruise control (dynamic radar cruise control).......................... 215
Radiator.................................................... 636
Radio ......................................................... 399
RBDS (Radio Broadcast Data Systems) .................................... 402
Rear air conditioning system........... 369
Rear personal lights ............................ 562
Rear side marker lights ........................ 192 Light switch............................................. 192
Replacing light bulbs ....................... 687
Welcome light illumination control ......................... 103
Rear door sunshades.......................... 587
Rear seat heaters ...................................581
Rear sunshade....................................... 586 Operation............................................. 586
Reverse operation feature ............ 587
P
R
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.