Window Defogger Wire (For Hatchback) On-Vehicle Inspection

Vehicle Exterior. Yaris. Ncp93, 131
Window Glass. Yaris. Ncp93, 131

  1. INSPECT BACK DOOR GLASS(DEFOGGER WIRE)

  2. INSPECT REAR WINDOW DEFOGGER

Window Defogger Wire (For Hatchback) -- On-Vehicle Inspection



1. INSPECT BACK DOOR GLASS(DEFOGGER WIRE)

  1. Turn the ignition switch to ON.

  1. Turn the defogger switch ON.



    Yaris. Ncp93, 131.Window Glass.Power Window Control System (For Sedan).Window Defogger Wire (For Hatchback) On-Vehicle Inspection

  1. Check the voltage.

    Text in Illustration
    *1
    		Tester Probe
    *2
    		Defogger Wire
    *3
    		Aluminum Foil
    *a
    		At Center

    1. Using a voltmeter, measure the voltage at the center of each defogger wire as shown in the illustration.

      Standard:
      Voltage
      		Condition
      Approximately 5 V
      		Wire not broken
      Approximately 10 or 0 V
      		Wire broken
      NOTICE:
      When measuring the voltage, wrap a piece of aluminum foil around the tip of the negative tester probe and press the foil against the wire with your finger, as shown in the illustration.
      HINT:
      If there is approximately 10 V, the wire may be faulty between the center of the wire and the battery. If there is no voltage, the wire may be faulty between the center of the wire and the ground.


    Yaris. Ncp93, 131.Window Glass.Power Window Control System (For Sedan).Window Defogger Wire (For Hatchback) On-Vehicle Inspection

  1. Place the positive (+) voltmeter probe against the defogger wire on the battery side.

    Text in Illustration
    *a
    		Ground Side
    *b
    		Battery Side
    *c
    		Foil Strip
    *d
    		Broken Wire
    *e
    		0 V
    *f
    		Less than 10 V

  1. Place the foil strip on the negative (-) voltmeter probe against the wire on the ground side.

  1. Slide the positive (+) probe from the battery side to the ground side.

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

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


2. INSPECT REAR WINDOW DEFOGGER

  1. Check the operation.

  1. Check that the indicator illuminates and the rear window defogger becomes warm when the rear defogger switch is pressed.

  1. Check that the indicator turns off and the rear window defogger operation terminates after approximately 15 minutes.