Toyota 2015 Prius Owner's Manual page 556

Cooling system
Capacity
Coolant type
Ignition system (spark plug)
Make
Gap
NOTICE
■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system
12-volt battery
Open voltage at 68F (20C):
Charging rates
PRIUS v_OM_OM47887U_(U)
Gasoline
7.3 qt. (6.9 L, 6.1 Imp.qt.)
engine
Power
2.9 qt. (2.7 L, 2.4 Imp.qt.)
control unit
Use either of the following:
• "Toyota Super Long Life Coolant"
• Similar high-quality ethylene glycol-
based non-silicate, non-amine, non-
nitrite, and non-borate coolant with
long-life hybrid organic acid technology
Do not use plain water alone.
DENSO SC20HR11
0.043 in. (1.1 mm)
12.5 V or higher: Fully charged
11.0 — 12.4 V: Half charged
10.9 V or lower: Discharged
(Voltage is checked 30 seconds after the
hybrid system and all lights are turned off.)
4.2 A max.
I n f o r ma t i o n P r o v i d e d b y :
555
9-1. Specifications
9