Engine Coolant Reservoir - Toyota 2014 Prius Owner's Manual

4-3. Do-it-yourself maintenance
Coolant
The coolant level is satisfactory if it is between the full ("FULL" or "F")
and low ("LOW" or "L") lines on the reservoir when the hybrid system
is cold.

Engine coolant reservoir

Power control unit coolant reservoir
430
Reservoir cap
"FULL" line
"LOW" line
If the level is on or below the
"LOW" line, add coolant up to the
"FULL" line. (→P. 572)
ITO43P111
Reservoir cap
"F" line
"L" line
If the level is on or below the "L"
line, add coolant up to the "F" line.
(→P. 572)