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Wiper And Washer System: Inspection

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  1. Inspect front wiper and washer switch continuity  .
    Fig 1: Displaying Front Wiper & Washer Switch & Terminals
    G01895702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Inspecting Wiper & Washer Switch Continuity
    G01895701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If continuity is not as specified, replace the switch.

  2. Inspect front wiper intermittent operation  .
    1. Turn the wiper switch to INT position.
    2. Turn the intermittent time control switch to FAST position.
    3. Connect the positive (+) lead from the battery to terminal 8 and the negative (-) lead to terminal 5.
    4. Connect the positive (+) lead from the voltmeter to terminal 7 and the negative (-) lead to terminal 5, check that the meter needle indicates battery voltage.
      Fig 3: Checking Battery Voltage (Terminals 5, 7 & 8)
      G01895703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. After connecting terminal 6 to terminal 8, connect to terminal 8 to terminal 5, check the voltage rises from 0 volts to battery voltage with in the times, as shown in the chart.
      Fig 4: Checking Battery Voltage (Terminals 5, 6 & 8)
      G01895704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 5: Displaying Specified Times For Voltage Rising
      G01895705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If operation is not as specified, replace the wiper and washer switch.

  3. Inspect front washer linked operation  .
    1. Connect the positive (+) lead from the battery to terminal 8 and the negative (-) lead to terminal 5.
    2. Connect the positive (+) lead from the voltmeter to terminal 7 and the negative (-) lead to terminal 5.
    3. Push in the washer switch, and check that the voltage changes, as shown in the chart.
      Fig 6: Inspecting Front Washer Linked Operation
      G01895706Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 7: Checking Voltage Changes
      G01895707Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If operation is not as specified, replace the wiper and washer switch.

  4. Inspect rear wiper and washer switch continuity  .
    Fig 8: Displaying Rear Wiper & Washer Switch & Terminals
    G01895709Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 9: Displaying Wiper & Washer Switch Specifications
    G01895708Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If continuity is not as specified, replace the switch.

  5. Low speed: Inspect front wiper motor operation 
    Fig 10: Displaying Front Wiper Motor Low Speed Inspection
    G01895710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 5, check that the motor operates at low speed.

    If operation is not as specified, replace the motor.

  6. High speed: Inspect front wiper motor operation  .
    Fig 11: Displaying Front Wiper Motor High Speed Inspection
    G01895711Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 5, check that the motor operates at high speed.

    If operation is not as specified, replace the motor.

  7. Stopping at stop position: Inspect front wiper motor operation  .
    1. Operate the motor at low speed and stop the motor operation anywhere except at the stop position by disconnecting positive (+) lead from terminal 1.
      Fig 12: Inspect Front Wiper Motor Operation (1 Of 2)
      G01895712Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect terminals 1 and 3.
    3. Connect the positive (+) lead from the battery to terminal 2 and negative (-) lead to terminal 5, check that the motor stops running at the stop position after the motor operates again.
      4. Fig 13: Inspect Front Wiper Motor Operation (2 Of 2)
      G01895713Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

  8. Inspect rear wiper motor and relay operation  .
    1. Connect the positive (+) lead from the battery to terminal 1, and the negative (-) lead to terminal 3 and the motor body, check that the motor operates.
      Fig 14: Inspecting Rear Wiper Motor & Relay Operation (1 Of 2)
      G01895714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the negative (-) lead from terminal 3, check that the motor stops running at the stop position.
      3. Fig 15: Inspecting Rear Wiper Motor & Relay Operation (2 Of 2)
      G01895715Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor and relay.

  9. Intermittent Inspect rear wiper motor and relay operation  .

    Connect the positive (+) lead from the battery to terminal 1, and the negative (-) lead to terminal 2 and the motor body, check that the motor operates intermittently for 9 - 15 seconds.

    If operation is not as specified, replace the motor and relay.

    Fig 16: Inspecting Rear Wiper Motor & Relay Operation
    G01895716Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. Inspect front and rear washer motor operation  .

    Connect the positive (+) lead from the battery to terminal 2, and the negative (-) lead to terminal 1, check that the motor operates.

    NOTE: These tests must be performed quickly (within 20 seconds) to prevent the coil from burning out.

    If operation is not as specified, replace the motor.

    Fig 17: Checking That Motor Operates
    G01895717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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