COOLING FAN SYSTEM ON-VEHICLE INSPECTION


  1. INSPECT COOLING FAN SYSTEM


    1. Put the vehicle in the following conditions.


      1. Turn the power switch off.

      2. The engine coolant temperature is less than 92°C (198°F).

      3. The battery voltage is between 11 and 14 V.

      4. The A/C switch is off.

    2. Connect the 400 A probe of an ammeter to the cooling fan motor harness (M+), and then No. 2 cooling fan motor harness (M+).


      1. Confirm the indication mark Click here.

      2. A01H1CBE01
        Text in Illustration
        *1 Cooling Fan Motor Harness (M+)
        *2 No. 2 Cooling Fan Motor Harness (M+)
        *a

        Component with harness connected

        (Cooling Fan ECU)

        for Indication Mark M:

      3. A01H1CBE01
        Text in Illustration
        *1 No. 2 Cooling Fan Motor Harness (M+)
        *2 Cooling Fan Motor Harness (M+)
        *a

        Component with harness connected

        (Cooling Fan ECU)

        for Indication Mark L:

    3. Turn the power switch on (IG) and wait for approximately 10 seconds. Check that the fan stops.

    4. Put the engine in inspection mode Click here.

    5. Start the engine. Check that the fan stops with the engine idling.

      Tech Tips


      • Make sure that the engine coolant temperature is less than 92°C (198°F).

      • Turn the A/C switch off.

    6. Check that the fan operates when the A/C switch is turned on (MAX COOL).


      1. Measure the current according to the value(s) in the table below.

        Standard Current
        Item Specified Condition
        Cooling fan motor 5.1 to 22.7 A
        No. 2 cooling fan motor 5.1 to 22.7 A

        Tech Tips

        The engine coolant temperature is less than 92°C (198°F).

    7. Check that the fan operates when the engine coolant temperature sensor connector is disconnected.


      1. Measure the current according to the value(s) in the table below.

        Standard Current
        Item Specified Condition
        Cooling fan motor 15.0 to 22.7 A
        No. 2 cooling fan motor 15.0 to 22.7 A
    8. A01H13AE01
      Text in Illustration
      *a Operating Diagram
      *b A/C off
      *c Fan Speed
      *d Engine Coolant Temperature

      After the engine is warmed up, check that the fan operates as shown in the illustration below.

      Tech Tips


      • The engine coolant temperature at which the fan starts operating is approximately 94°C (201°F).

      • This system can also be checked using the intelligent tester.

      • Enter the following menus: Powertrain / Engine / Data List / All Data / Initial Engine Coolant Temp.