Wiper And Washer System: Inspection

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Inspect front wiper and washer switch continuity :

Fig 1: Identifying Front Wiper & Washer Switch Positions & Locating Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Front Wiper & Washer Switch Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.
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 16 and the negative (-) lead to terminal 2.
4. Connect the positive (+) lead from the voltmeter to terminal 7 and the negative (-) lead to terminal 2, check that the meter needle indicates battery positive voltage.
  
  Fig 3: Locating Front Wiper Intermittent Connector Terminals & Testing Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Intermittent Front Wiper Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If continuity is not as specified, replace the switch.
Inspect front washer linked operation :
1. Connect the positive (+) lead from the battery to terminal 16 and the negative (-) lead to terminal 2.
2. Connect the positive (+) lead from the voltmeter to terminal 7 and the negative (-) lead to terminal 2.
3. Push in the washer switch, and check that the voltage changes as shown in the table.
  
  Fig 5: Testing Front Washer Linked Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Front Washer Linked Operation Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, replace the wiper and washer switch.
Inspect rear wiper and washer switch continuity :

Fig 7: Identifying Rear Wiper & Washer Switch Positions & Locating Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 8: Rear Wiper And Washer Switch Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.

If operation is not as specified, replace the motor.
Low speed , inspect wiper motor operation:
Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead from the battery to the motor body or terminal 4, and check that the motor operates at low speed.

Fig 9: Testing Wiper Motor Low Speed
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If operation is not as specified, replace the motor.
High Speed , inspect wiper motor operation:
Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead from the battery to the motor body or terminal 4, and check that the motor operates at high speed. If operation is not as specified, replace the motor.

Fig 10: Testing Wiper Motor High Speed
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Stopping at Stop Position , inspect 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 5.
  
  Fig 11: Testing Front Wiper Motor Stop Position (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminals 1 and 5.
3. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead from the battery to the motor body or terminal 4, and check that the motor stops running at the stop position after the motor operates again.
  
  Fig 12: Testing Front Wiper Motor Stop Position (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, replace the motor.

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

Fig 13: Testing Washer Motor

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

If operation is not as specified, replace the motor.
Inspect rear wiper motor operation :
Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead from the battery to the motor body or terminal 4, and check that the motor operates.

Fig 14: Testing Rear Wiper Motor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If operation is not as specified, replace the motor.
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 15: Testing Front Wiper Motor Stop Position (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminals 2 and 5.
3. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead from the battery to the motor body or terminal 4, and check that the motor stops running at the stop position after the motor operates again.
  
  Fig 16: Testing Front Wiper Motor Stop Position (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, replace the motor.