Lexus ES300h Owner's Manual page 451

Coolant
The coolant level is satisfactory if it is between the "FULL" and "LOW" lines on
the reservoir when the hybrid system is cold.
Engine coolant reservoir
■
Reservoir cap
1
"FULL" line
2
"LOW" line
3
If the level is on or below the "LOW"
line, add coolant up to the "FULL"
line. (P. 527)
Power control unit coolant reservoir
■
Reservoir cap
1
"FULL" line
2
"LOW" line
3
If the level is on or below the "LOW"
line, add coolant up to the "FULL"
line. (P. 527)
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.
If the coolant level drops within a short time of replenishing
■
Visually check the radiator, hoses, engine coolant reservoir cap, power control unit cool-
ant reservoir cap, drain cock and water pump.
If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in the
cooling system.
ES300h_OM_OM33B71U_(U)
7-3. Do-it-yourself maintenance
451
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