Toyota Prius Prime 2020 Manual page 592

592
7-3. Do-it-yourself maintenance
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. 709)
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. 709)