Toyota Highlander Service Manual: Cooling fan system (2AZ-FE)

Inspection

1. INSPECT THERMOSTAT HINT: The thermostat is numbered with the valve opening temperature is stamped on the thermostat. (a) Immerse the thermostat in water and gradually heat the water. ...

On-vehicle inspection

HINT: The cooling fan may rotate when the ignition switch is turned from ACC to ON. This is normal. 1. CHECK COOLING FAN OPERATION WITH LOW TEMPERATURE (Below 83 C (181 F)) (a) Turn the ignition ...

More about Toyota Highlander:

If your vehicle overheats
The following may indicate that your vehicle is overheating. The needle of the engine coolant temperature gauge Enters the red zone or a loss of engine power is experienced. (For example, the vehicle speed does not increase.)  Steam comes out from under the hood. Correction proced ...