WINDOW DEFOGGER SYSTEM ON-VEHICLE INSPECTION


  1. CHECK REAR WINDOW DEFOGGER SYSTEM


    1. When the engine switch is turned on (IG) and the defogger switch is pressed, check that the rear window defogger operates.

      Tech Tips

      After 15 minutes, check that the defogger automatically turns OFF.

  2. INSPECT BACK WINDOW (DEFOGGER WIRE)

    A0161VBE01

    Note


    • When cleaning the glass, wipe the glass along the wire using a soft and dry cloth. Be careful not to damage the wires.

    • Do not use detergents or glass cleaners that have abrasive ingredients.

    • A0160HGE01

      When measuring voltage, wrap a piece of tin foil around the tip of the negative tester probe and press the foil against the wire with your finger, as shown in the illustration.


    1. Turn the engine switch on (IG).

    2. Turn the defogger switch ON.

    3. A01629CE15

      Check the voltage at the center of each defogger wire, as shown in the illustration.

      Standard Voltage
      Voltage Condition
      Approx. 5 V Wire is not broken
      Approx. 10 or 0 V Wire is broken

      Tech Tips

      If there is approximately 10 V, the wire may be faulty between the center of the wire and the wire end on the battery side. If there is no voltage, the wire may be faulty between the center of the wire and the wire end on the ground side.

    4. Place a positive (+) lead of the voltmeter against the defogger wire on the battery side.

    5. Place a negative (-) lead of the voltmeter with the foil strip against the wire on the ground side.

    6. Slide a positive (+) lead from the battery side to the ground side.

    7. The point where the voltage drops from approximately 10 V to 0 V is the place where the defogger wire is broken.

      Tech Tips

      If the defogger wire is not broken, the voltmeter should indicate 0 V at the positive (+) end of the defogger wire but gradually increases to approximately 12 V as the meter probe moves to the other end.