Toyota PRIUS 50 2020 Series Owner's Manual page 389

Coolant
The coolant level is satisfactory if it is between the "MAX" and "MIN"
lines on the reservoir when the hybrid system is cold.
■
Engine coolant reservoir
1
Reservoir cap
2
"MAX" line
3
"MIN" line
If the level is on or below the
"MIN" line, add coolant up to the
"MAX" line. (P. 498)
■ Power control unit coolant reservoir
1
Reservoir cap
2
"FULL" line
3
"LOW" line
If the level is on or below the
"LOW" line, add coolant up to
the "FULL" line. (P. 500)
6-3. Do-it-yourself maintenance
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