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Cooling Fan System: Inspection

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  1. INSPECT J/B NO. (FAN MAIN RELAY) 
    1. Turn the ignition switch OFF.
    2. Remove the No.2 junction block (J/B No.2)
    3. Inspect the fan main relay.
      Fig 1: Identifying Fan Main Relay
      G00906692Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Connect the positive battery lead wire to terminal FCB of the J/B No.2, and connect the negative battery lead wires to terminals SGND and PGND.
        POSITIVE AND NEGATIVE LEAD DIFFERENCE

        Positive Lead Negative Lead
        FCB (2D-2) SGND (2H-13), PGND (2F-1)
      2. Measure voltage between terminals FCL and SGND.

        Standard: 

        VOLTAGE BETWEEN TERMINALS FCL AND SGND

        Symbols (Terminal No.) Specified Condition
        FCL (2C-2) - SGND (2H-13) 0V
      3. Additionally connect the positive battery lead to terminal IG1 with the condition (1) maintained.
        POSITIVE AND NEGATIVE LEAD DIFFERENCE

        Positive Lead Negative Lead
        FCB (2D-2), IG1 (2B-9) SGND (2H-13), PGND (2F-1)
      4. Measure voltage between the terminals.

        Standard: 

        VOLTAGE BETWEEN TERMINALS

        Symbols (Terminal No.) Specified Condition
        FCL (2C-2) - SGND (2H-13) 10 to 14V
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