3407-3. Do-it-yourself maintenance
YARIS_HV_OM_Europe_OM52G76E 
■ If the coolant level drops within a short time of replenishing 
Visually check the radiator, hoses, engine/power control unit coolant reservoir 
caps, drain cock and water pump. 
If you cannot find a leak, have any authorized Toyota dealer or repairer, or 
another duly qualified and equipped professional, test the cap and check for 
leaks in the cooling system.
Check the radiator and condenser and clear away any foreign objects.  
If any of the above parts is extremely dirty or you are not sure of their 
condition, have your vehicle inspected by any authorized Toyota 
dealer or repairer, or another duly qualified and equipped profes- 
sional.
WARNING
■ When the hybrid system is hot 
Do not remove the engine/power control unit coolant reservoir caps.  
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■ When adding coolant 
Coolant is neither plain water nor stra ight antifreeze. The correct mixture of 
water and antifreeze must be used to provide proper lubrication, corrosion 
protection and cooling. Be sure to read the antifreeze or coolant label. 
■ If you spill coolant 
Be sure to wash it off with water to prevent it from damaging parts or paint.
Radiator and condenser
WARNING
■ When the hybrid system is hot 
Do not touch the radiator or condenser as they may be hot and cause seri- 
ous injuries, such as burns.