TOYOTA 2010 Highlander - Manual (Page 425)

445
4-3. Do-it-yourself maintenance
4
Mainten
ance an
d ca
re
Engine coolant
The coolant level is satisfactory if it is between the “FULL” and “LOW”
lines on the reservoir when the engine is cold.
Reservoir cap
“FULL”
“LOW”
If the level is on or below the
“LOW” line, add coolant up to the
“FULL” line.