When Adding Engine/Power Control Unit Coolant; To Prevent Damage To The Cooling System - Toyota RAV4 Hybrid 2018 Service Manual

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8-2. Steps to take in an emergency
NOTICE
■

When adding engine/power control unit coolant

Add coolant slowly after the hybrid system has cooled down sufficiently.
Adding cool coolant to a hot hybrid system too quickly can cause damage to
the hybrid system.
■

To prevent damage to the cooling system

Observe the following precautions:
●
Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
●
Do not use any coolant additive.
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