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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 71 (Engine Cooling System (M20A-FKS) - Service Information) >> COOLING FAN ECU (w/ Cooling Fan ECU) >> On-Vehicle Inspection [09/2022 - ] >> Procedure

On-Vehicle Inspection [09/2022 - ]: Procedure

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  1. CHECK COOLING FAN SYSTEM 
    1. Check and ensure the following conditions:
      1. The ignition switch is off.
      2. The engine coolant temperature is less than 96 °C (205 °F).
      3. The battery voltage is between 11 to 14 V.
      4. The A/C switch is off.
    2. Connect the pickup of a clamp-on ammeter around either of the 2 wires for the cooling fan motor.
    3. Turn the ignition switch to ON and wait for approximately 10 seconds. Check that the cooling fan is not operating.
    4. Start the engine. Check that the cooling fan is not operating with the engine idling.

      HINT: 

      • Make sure that the engine coolant temperature is less than 96 °C (205 °F).
      • Turn the A/C switch off.
    5. Check that the cooling fan operate when the A/C switch is turned on.
    6. Measure the current while the cooling fan motor is turning.

      Standard Current

      Item Condition Specified Condition
      Cooling fan motor Battery voltage applied at 20°C (68°F) 12.2 to 15.7 A

      HINT: 

      The engine coolant temperature should be less than 96 °C (205 °F).

    7. Check that the cooling fan operate when the engine coolant temperature sensor connector is disconnected.
    8. Measure the current while the cooling fan motor is turning.

      Standard Current

      Item Condition Specified Condition
      Cooling fan motor Battery voltage applied at 20°C (68°F) 12.2 to 15.7 A
    9. After the engine is warmed up, check that the cooling fan operate as shown in the illustration.
      GTY432638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Operating Diagram
      *b Fan
      *c ON
      *d OFF

      HINT: 

      • The engine coolant temperature at which the fans start operating is approximately 98 °C (208 °F).
      • This system can also be checked using the Techstream.

        Enter the following menus: Powertrain / Engine / Data List / Coolant Temperature

      Powertrain > Engine > Data List 

      Tester Display
      Coolant Temperature