IfTroubleArises -> Overheating for Your Toyota Yaris 4 Door Fourth Generation (2021-2026)

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6-5. Overheating  
Overheating  
If the high engine coolant temperature warning light turns on,  
the vehicle loses power, or you hear a loud knocking or pinging  
noise, the engine is probably too hot.  
If the high engine coolant temperature warning light turns on:  
1
Drive safely to the side of the road and park off the right-of-way.  
2
Put a vehicle with an automatic transaxle in park (P), a manual tran-  
saxle in neutral.  
3
Apply the parking brake.  
4
Turn off the air conditioner.  
5
Check whether coolant or steam is escaping from the engine com-  
partment.  
If steam is coming from the engine compartment  
Do not go near the front of the vehicle. Stop the engine.  
Wait until the steam dissipates, then open the hood and start the  
engine.  
If neither coolant nor steam is escaping  
Open the hood and idle the engine until it cools.  
6
Make sure the cooling fan is operating, then turn off the engine after  
the temperature has decreased.  
7
When cool, check the coolant level.  
If it is low, look for coolant leaks from the radiator and hoses.  
If you find a leak or other damage, or if coolant is still leaking:  
Stop the engine and call your Toyota dealer.  
1
2
3
Cooling fan  
Cooling system cap  
Coolant reservoir  
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)  
485  
6-5. Overheating  
If you find no problems, the engine is cool, and no leaks are  
obvious:  
Carefully add coolant as required (P. 398).  
WARNING  
Pull over to a safe location, then switch the ignition to off and  
make sure the fan is not running before attempting to work near the  
cooling fan  
Working near the cooling fan when it is running is dangerous. The fan could  
continue running indefinitely even if the engine has stopped and the engine  
compartment temperature is high. You could be hit by the fan and seriously  
injured.  
Do not remove either cooling system cap when the engine and  
radiator are hot  
When the engine and radiator are hot, scalding coolant and steam may  
shoot out under pressure and cause serious injury.  
Open the hood ONLY after steam is no longer escaping from the engine  
Steam from an overheated engine is dangerous. The escaping steam could  
seriously burn you.  
6
NOTICE  
If the cooling fan does not operate while the engine is running, the engine  
temperature will increase. Stop the engine and call your Toyota dealer.  
If the engine continues to overheat or frequently overheats, have the cool-  
ing system inspected. The engine could be seriously damaged unless  
repairs are made. Consult your Toyota dealer.  
YARIS_YARIS HATCHBACK_OM_OM99V59z_(U)