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Section 382 (Wiper & Washer System): Inspection

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT FRONT WIPER AND WASHER SWITCH CONTINUITY 
    SWITCH POSITION SPECIFIED CONDITION CHART

    Switch position Tester connection Specified condition
    OFF 7-16 Continuity
    AUTO 7-16,4-14 Continuity
    LO 7-17 Continuity
    HI 8-17 Continuity
    Washer OFF - No continuity
    Washer ON 2-11 Continuity

    If continuity is not as specified, replace the switch.

    Fig 1: Inspecting Front Wiper & Washer Switch Continuity
    G03375478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT FRONT WIPER AND WASHER SWITCH CIRCUIT 

    Disconnect the connector from the motor and inspect the connector on the wire harness side, as shown.

    Fig 2: Identifying Connector On Wire Harness Side
    G03375479Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SWITCH POSITION SPECIFIED CONDITION CHART

    Tester connection Condition Specified condition
    2 - Ground Always Continuity
    11 -Ground Ignition switch LOCK or ACC No voltage
    11 -Ground Ignition switch ON Battery positive voltage

    If circuit is not as specified, inspect the circuits connected to other parts.

  3. 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 battery positive (+) lead to terminal 16 and the battery negative (-) lead to terminal 2.
    4. Connect the voltmeter positive (+) lead to terminal 7 and the voltmeter negative (-) lead to terminal 2, and check that the meter needle indicates battery voltage.
      Fig 3: Connecting Battery Positive (+) Lead To Terminal 16 & Battery Negative (-) Lead To Terminal 2
      G03375480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. After connecting terminal 16 to terminal 17, connect to terminal 2 to terminal 17, check the voltage rises from 0 volts to battery voltage within the times as shown in the table.
    Fig 4: Checking Voltage Rises From 0 Volts To Battery Voltage
    G03375481Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Voltage Specification Chart
    G03375482Courtesy 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 
    SWITCH POSITION SPECIFIED CONDITION CHART

    Switch position Tester connection Specified condition
    Washer 1 2-12 Continuity
    OFF - No Continuity
    INT 2-13 Continuity
    ON 2-10 Continuity
    Washer 2 2-10-12 Continuity

    If continuity is not as specified, replace the switch.

    Fig 6: Inspecting Rear Wiper & Washer Switch Continuity
    G03375483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT REAR WIPER AND WASHER SWITCH CIRCUIT 

    Disconnect the connector from the motor and inspect the connector on the wire harness side, as shown.

    Fig 7: Identifying Connector On Wire Harness Side
    G03375484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SWITCH POSITION SPECIFIED CONDITION CHART

    Tester connection Condition Specified condition
    2 - Ground Always Continuity
    12-Ground Ignition switch ON Battery positive voltage

    If circuit is not as specified, inspect the circuits connected to other parts.

  6. Low Speed: INSPECT FRONT WIPER MOTOR OPERATION 

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

    If operation is not as specified, replace the motor.

    Fig 8: Connecting Battery Positive (+) Lead To Terminal 1 & Battery Negative (-) Lead To Terminal 5
    G03375485Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. High speed: INSPECT FRONT WIPER MOTOR OPERATION 

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

    If operation is not as specified, replace the motor.

    Fig 9: Checking Motor Operates At High Speed
    G03375486Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. 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 the battery positive (+) lead from terminal 1.
      Fig 10: Operating Motor At Low Speed & Stop Motor Operation
      G03375487Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect terminals 1 and 3.
    3. Connect the battery positive (+) lead to terminal 2 and the battery negative (-) lead to terminal 5, and check that the motor stops running at the stop position after the motor operates again.

    If operation is not as specified, replace the motor.

    Fig 11: Connecting Battery Positive (+) Lead To Terminal 2 & Battery Negative (-) Lead To Terminal 5
    G03375488Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. Connector disconnected: INSPECT FRONT WIPER MOTOR CIRCUIT 

    Disconnect the connector from the motor and inspect the connector on the wire harness side, as shown.

    Fig 12: Identifying Connector On Wire Harness Side
    G03375489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SWITCH POSITION SPECIFIED CONDITION CHART

    Tester connection Condition Specified condition
    5 - Ground Always Continuity
    2 - Ground Ignition switch LOCK or ACC No voltage
    2 - Ground Ignition switch ON Battery positive voltage

    If circuit is not as specified, inspect the circuits connected to other parts.

  10. Low Speed: INSPECT REAR WIPER MOTOR OPERATION 

    Connect the battery positive (+) lead to terminal 3 and the battery negative (-) lead to terminal 2, and check that the motor operates at low speed.

    If operation is not as specified, replace the motor.

    Fig 13: Connecting Battery Positive (+) Lead To Terminal 3 & Battery Negative (-) Lead To Terminal 2
    G03375490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. Stopping at Stop Position: INSPECT REAR 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 3.
      Fig 14: Disconnecting Positive (+) Lead From Terminal 3
      G03375491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Connect terminals 3 and 4.
    3. Connect the battery positive (+) lead to terminal 1 and the battery negative (-) lead to terminal 2, and check that the motor stops running at the stop position after the motor operates again.

    If operation is not as specified, replace the motor.

    Fig 15: Checking Motor Stops Running At Stop Position After Motor Operates Again
    G03375492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. Connector disconnected: INSPECT REAR WIPER MOTOR CIRCUIT 

    Disconnect the connector from the motor and inspect the connector on the wire harness side, as shown.

    Fig 16: Identifying Connector On Wire Harness Side
    G03375493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SWITCH POSITION SPECIFIED CONDITION CHART

    Tester connection Condition Specified condition
    1 - Ground Ignition switch OFF or ACC No voltage
    1 - Ground Ignition switch ON Battery positive voltage
    2 - Ground Always Continuity
    3-4 Always Continuity

    If circuit is not as specified, inspect the circuits connected to other parts.

  13. INSPECT FRONT WASHER MOTOR OPERATION 

    Connect the battery positive (+) lead to terminal 2 and the battery 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: Connecting Battery Positive (+) Lead To Terminal 2 & Battery Negative (-) Lead To Terminal 1
    G03375494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. Connector disconnected: INSPECT FRONT WASHER MOTOR CIRCUIT 

    Disconnect the connector from the motor and inspect the connector on the wire harness side, as shown.

    Fig 18: Identifying Connector On Wire Harness Side
    G03375495Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SWITCH POSITION SPECIFIED CONDITION CHART

    Tester connection Condition Specified condition
    2-Ground Ignition switch ON Battery positive voltage

    If circuit is not as specified, inspect the power source and wire harness.

  15. INSPECT REAR WASHER MOTOR OPERATION 

    Connect the battery positive (+) lead to terminal 2 and the battery 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 19: Connecting Battery Positive (+) Lead To Terminal 2 & Battery Negative (-) Lead To Terminal 1
    G03375496Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. Connector disconnected: INSPECT REAR WASHER MOTOR CIRCUIT 

    Disconnect the connector from the motor and inspect the connector on the wire harness side, as shown.

    Fig 20: Identifying Connector On Wire Harness Side
    G03375497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SWITCH POSITION SPECIFIED CONDITION CHART

    Tester connection Condition Specified condition
    2 - Ground Ignition switch ON Battery positive voltage

    If circuit is not as specified, inspect the power source, the wire harness and the wiper switch.

  17. INSPECT REAR WIPER RELAY OPERATION (See  PROBLEM SYMPTOMS TABLE  ) 
  18. INSPECT REAR WIPER RELAY INTERMITTENT OPERATION (See  PROBLEM SYMPTOMS TABLE  ) 
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