ES300 1992-1997

Window Systems 1

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Power Windows



Diagnosis & Testing

Specific to:

Lexus ES300 1992-1996

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Inspect power window master switch (Continuity):
    1. Inspect the switch continuity between terminals.
    2.  
    3. If continuity is not as specified, replace the switch.

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      Fig. Window master switch pinout



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      Fig. Front driver-s window switch (unlock) continuity



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      Fig. Front driver-s window switch (lock) continuity



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      Fig. Front passenger-s window switch (unlock) continuity



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      Fig. Front passenger-s window switch (lock) continuity



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      Fig. Rear left window switch (unlock) continuity



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      Fig. Rear left window switch (lock) continuity



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      Fig. Rear right window switch (unlock) continuity



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      Fig. Rear right window switch (lock) continuity

    4.  

  4.  
  5. Inspect power window master switch (Circuit):
    1. Disconnect the connector from the master switch and inspect the connector on the wire harness side as shown.
      NOTE
      Exceptions: During 60 second period after ignition switch ON - OFF (ACC) or until driver or passenger door is opened after ignition switch ON - OFF (ACC). If the circuit is not as specified, refer to wiring diagram and inspect the circuits connected to other parts.



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      Fig. Inspect the master switch connector on the wire harness side



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      Fig. Power window master switch continuity testing

    2.  

  6.  
  7. Inspect power window switch (Switch Continuity):
    1. Inspect switch continuity between terminals.
    2.  
    3. If continuity is not as specified, replace the switch.

      Click image to see an enlarged view

      Fig. Power window switch pinout



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      Fig. Power window switch continuity testing

    4.  

  8.  
  9. Inspect power window switch (Switch Circuit):
    1. Disconnect the connector from the switch and inspect the connector on the wire harness side as shown.
      NOTE
      Exceptions: During 60 second period after ignition switch ON - OFF (ACC) or until driver or passenger door is opened after ignition switch ON - OFF (ACC). If the circuit is not as specified, refer to wiring diagram and inspect the circuits connected to other parts.



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      Fig. Inspect the switch connector on the wire harness side



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      Fig. Power window switch circuit testing

    2.  

  10.  
  11. Inspect power main relay (Continuity):
  12.  
  13. Inspect relay continuity between terminals.
    1. If continuity is not as specified, replace the relay.

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      Fig. Power window main relay



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      Fig. Power window main relay continuity testing

    2.  

  14.  
  15. Inspect power window motor (Driver-s Door Motor/Motor Operation):
    1. Connect the positive lead from the battery to terminal 2 and the negative lead to terminal 1, check that the motor turns counterclockwise.
    2.  
    3. Reverse the polarity, check that the motor turns clockwise.
    4.  
    5. If operation is not as specified, replace the motor.

      Click image to see an enlarged view

      Fig. Connect the positive lead from the battery to terminal 2 and the negative lead to terminal 1, and reverse the polarity

    6.  

  16.  
  17. Inspect power window motor (Driver-s Door Motor/Circuit Breaker Operation):
    1. Disconnect the connector from the master switch.
    2.  
    3. Connect the positive lead from the battery to terminal 3 and the negative lead to terminal 6 on the wire harness side connector and raise the window to full closed position.
    4.  
    5. Continue to apply voltage, check that there is a circuit breaker operation noise within approximately 4 to 40 seconds.

      Click image to see an enlarged view

      Fig. Connect the positive lead from the battery to terminal 3 and the negative lead to terminal 6 on the wire harness side connector

    6.  
    7. Reverse the polarity, check that the window begins to descend within approximately 60 seconds.
    8.  
    9. If operation is not as specified, replace the motor.

      Click image to see an enlarged view

      Fig. Reverse the polarity

    10.  

  18.  
  19. Inspect power window motor (Front Passenger-s Door Motor/Motor Operation):
    1. Connect the positive lead from the battery to terminal 1 and the negative lead to terminal 2, check that the motor turns counterclockwise.

      Click image to see an enlarged view

      Fig. Connect the positive lead from the battery to terminal 1 and the negative lead to terminal 2, and reverse the polarity

    2.  
    3. Reverse the polarity, check that the motor turns clockwise.
    4.  
    5. If operation is not as specified, replace the motor.
    6.  

  20.  
  21. Inspect power window motor (Front Passenger-s Door Motor/Circuit Breaker Operation):
    1. Disconnect the connector from the power window switch.
    2.  
    3. Connect the positive lead from the battery to terminal 5 and the negative lead to terminal 1 on the wire harness side connector, and raise the window to full closed position.

      Click image to see an enlarged view

      Fig. Connect the positive lead from the battery to terminal 5 and the negative lead to terminal 1 on the wire harness side connector

    4.  
    5. Continue to apply voltage, check that there is a circuit breaker operation noise within approximately 4 to 40 seconds.
    6.  
    7. Reverse the polarity, check that the window begins to descend within approximately 60 seconds.
    8.  
    9. If operation is not as specified, replace the motor.

      Click image to see an enlarged view

      Fig. Reverse the polarity

    10.  

  22.  
  23. Inspect power window motor (Rear Left Side Door Motor/Motor Operation):
    1. Connect the positive lead from the battery to terminal 1 and the negative lead to terminal 2, check that the motor turns counterclockwise.
    2.  
    3. Reverse the polarity, check that the motor turns clockwise.
    4.  
    5. If operation is not as specified, replace the motor.

      Click image to see an enlarged view

      Fig. Connect the positive lead from the battery to terminal 1 and the negative lead to terminal 2, and reverse the polarity

    6.  

  24.  
  25. Inspect power window motor (Rear Right Side Door Motor/Motor Operation):
    1. Connect the positive lead from the battery to terminal 2 and the negative lead to terminal 1, check that the motor turns counterclockwise.
    2.  

  26.  
  27. Reverse the polarity, check that the motor turns clockwise.
    1. If operation is not as specified, replace the motor.

      Click image to see an enlarged view

      Fig. Connect the positive lead from the battery to terminal 2 and the negative lead to terminal 1, and reverse the polarity

    2.  

  28.  
  29. Inspect power window motor (Circuit):
    1. Disconnect the connector from the motor.
    2.  
    3. Connect the connector to the master switch and power window switch.
    4.  
    5. Inspect the connector on the wire harness side as shown.
    6.  
    7. Set the window lock switch to the unlock position (except driver-s door motor).
    8.  
    9. If the circuit is not as specified, refer to wiring diagram and inspect the circuits connected to other parts.

      Click image to see an enlarged view

      Fig. Inspect the connector on the wire harness side



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      Fig. Power window front door motor circuit testing



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      Fig. Power window rear door motor circuit testing

    10.  

  30.  

Specific to:

Lexus ES300 1997-1998

 
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