COOLING FAN ECU ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT COOLING FAN ECU


    1. Put the vehicle in the following conditions:


      1. Turn the power switch off.

      2. The 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. Clamp the 400 A probe of an ammeter over the M+ wire of each cooling fan motor.

    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 (maintenance mode). Click here

    5. Start the engine. Check that the fan is stopped with the engine idling.

      Tech Tips


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

      • Make sure that the A/C switch is off.

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

      Standard Current
      Item Specified Condition
      Cooling fan motor 3 to 13 A
      No. 2 cooling fan motor 3 to 13 A

      Tech Tips

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

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

      Standard Current
      Item Specified Condition
      Cooling fan motor 12 to 19 A
      No. 2 cooling fan motor 12 to 19 A
    8. A000PMAE01
      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.

      Tech Tips


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

      • This system can also be checked using the GTS.

      • Enter the following menus: Powertrain / Engine and ECT / Data List / Coolant Temp.