2017 LEXUS LS600H coolant

4996-3. Do-it-yourself maintenance
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Maintenance and care
LS600h/LS600hL_EE(OM50G20E)
■Power control unit coolant reservoir
The coolant level is satisfactory if it is between the “F” and “L” lines on
the reservoir when the hybrid system is cold.
Reservoir cap
“F” line
“L” line
If the level is on or below the “L”
line, add coolant up to the “F” line.
( P. 611)
■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.
“Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deionized
water. (Minimum temperature: -35 C [-31F])
For more details about coolant, contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
■If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine/power control unit coolant reservoir caps,
drain cock and water pump.
If you cannot find a leak, have any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional, test the cap and check for leaks in the
cooling system.
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5006-3. Do-it-yourself maintenance
LS600h/LS600hL_EE(OM50G20E)
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 inspec ted by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
CAUTION
■When the hybrid system is hot
Do not remove the engine/power control unit coolant reservoir caps. ( P. 615)
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 cooling. 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 and condenser
CAUTION
■When the hybrid system is hot
Do not touch the radiator or condenser as they may be hot and cause serious inju-
ries, such as burns.

5547-2. Steps to take in an emergency
LS600h/LS600hL_EE(OM50G20E)
●Fluid leaks under the vehicle.
(Water dripping from the air conditioning after use is normal.)
●Flat-looking tires or uneven tire wear
●Engine coolant temperature gauge needle continually points higher
than normal.
●Changes in exhaust sound
●Excessive tire squeal when cornering
●Strange noises related to the suspension system
●Pinging or other noises related to the hybrid system
●Engine missing, stumbling or running roughly
●Appreciable loss of power
●Vehicle pulls heavily to one side when braking
●Vehicle pulls heavily to one side when driving on a level road
●Loss of brake effectiveness, spongy feeling, pedal almost touches the
floor
If you think something is wrong
If you notice any of the followin g symptoms, your vehicle probably
needs adjustment or repair. Cont act any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms

5657-2. Steps to take in an emergency
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When trouble arises
LS600h/LS600hL_EE(OM50G20E)
■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 depressed
■The LKA (Lane-Keeping Assist) lane de parture warning function (if equipped)
In the following cases, the warning message will not be displayed even if a lane line is
crossed.
●When the vehicle speed deviates from the operating range of the LKA system
functions
●When the lane lines cannot be recognized
●When the steering wheel is turned as far as necessary to cause the vehicle to
change lanes
■System warning lights
The master warning light does not come on or flash in the following cases. Instead, a
separate system warning light will come on or flash along with the message shown
on the multi-information display.
●Malfunction of the brake system
The brake system warning light (red indicator) comes on. ( P. 555)
●Malfunction of the regenerative brake system, electronically controlled brake sys-
tem or electric parking brake
The brake system warning light (yellow indicator) comes on. ( P. 557)
●Malfunction of the ABS
The ABS warning light comes on. ( P. 556)
●Malfunction of the charging system
The charging system warning light comes on. ( P. 556)
●Indicates that a door or the trunk is not fully closed
The open door warning light comes on. ( P. 558)
●High engine coolant temperature
The needle of the engine coolant temperature gauge enters the red zone.
( P. 611)

6117-2. Steps to take in an emergency
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When trouble arises
LS600h/LS600hL_EE(OM50G20E)
●The needle of the engine coolant temperature gauge ( P. 115) enters
the red zone or a loss of hybrid system power is experienced. (For
example, the vehicle speed does not increase.)
●“Hybrid System Overheat” is shown on the multi-information display.
●Steam comes out from under the hood.
■If the needle of the engine cool ant temperature gauge enters the red
zone
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system 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 any
authorized Lexus dealer or
repairer, or anot her duly quali-
fied and equipped professional.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
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6127-2. Steps to take in an emergency
LS600h/LS600hL_EE(OM50G20E)
The coolant level is satisfactory
if it is between the “FULL” and
“LOW” lines on the reservoir.
Reservoir
“FULL”
“LOW”
Add coolant if necessary.
( P. 493)
Water can be used in an emer-
gency if coolant is unavailable.
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6137-2. Steps to take in an emergency
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When trouble arises
LS600h/LS600hL_EE(OM50G20E)
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fan operates and to check for coolant
leaks from the radiator or hoses.
The fan operates when the air conditioning system is turned on immediately
after a cold start. Confirm that the fan is 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 fan is not operating:
Stop the hybrid system immediat ely and contact any authorized
Lexus dealer or repairer, or another duly qualified and equipped pro-
fessional.
If the fan is operating:
Have the vehicle inspected at the nearest any authorized Lexus
dealer or repairer, or another duly qualified and equipped profes-
sional.
■If “Hybrid System Overheat” is shown on the multi-information dis-
play
Stop the vehicle in a safe place.
Stop the hybrid system an d carefully lift the hood.
After the hybrid system has
cooled down, inspect the
hoses and radiator core (radia-
tor) for any leaks.
Radiator
Cooling fans
If a large amount of coolant
leaks, immediately contact any
authorized Lexus dealer or
repairer, or anot her duly quali-
fied and equipped professional.
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6147-2. Steps to take in an emergency
LS600h/LS600hL_EE(OM50G20E)
The coolant level is satisfactory
if it is between the “F” and “L”
lines on the reservoir.
Reservoir
“F”
“L”
Add coolant if necessary.
( P. 493)
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and check for the multi-information display.
If the message does not disappear:
Stop the hybrid system and contact any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
If the message is not displayed:
Have the vehicle inspected at the nearest any authorized Lexus
dealer or repairer, or another duly qualified and equipped profes-
sional.
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