On-Vehicle Inspection

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

It is normal for the cooling fan to sometimes rotate when the ignition switch is turned from ACC to ON.

CHECK COOLING FAN OPERATION AT LOW TEMPERATURES (Below 94°C (201°F))
1. Turn the ignition switch ON with the A/C switch OFF.
2. Check that the cooling fan stops.
  If it does not, check the cooling fan relays and engine coolant temperature sensor, and then check for disconnection of the connector or wire breaks between the cooling fan relay and engine coolant temperature sensor.
  
  Fig 1: Checking Cooling Fan Operation At Low Temperatures
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the engine coolant temperature sensor connector.
  
  Fig 2: Disconnecting Engine Coolant Temperature Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check that the cooling fan rotates.
  If it does not, check the fuses, cooling fan relays, ECM and cooling fan, and then check for an open circuit between the cooling fan relay and engine coolant temperature sensor.
  
  Fig 3: Checking Cooling Fan Rotation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Reconnect the engine coolant temperature sensor connector.
CHECK COOLING FAN OPERATION AT HIGH TEMPERATURES (Above 96°C (205°F))
1. Start the engine, and then raise the coolant temperature to above 96°C (205°F).
  HINT:
  
  Coolant temperature is the value detected by the engine coolant temperature sensor on the cylinder head.
2. Check that the A/C switch is OFF.
3. Check that the cooling fan rotates.
  If it does not, check the engine coolant temperature sensor, cooling fan, harness or connector.
  
  Fig 4: Checking Cooling Fan For Rotation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002