Section 574 (Wiper System & Washer System): Inspection

WARNING: This page is about a different car, the 2003 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FRONT WIPER AND WASHER SWITCH CONTINUITY

FRONT WIPER AND WASHER SWITCH CONTINUITY SPECIFICATIONS

Switch Position	Tester Connection	Specified Condition
OFF	7 - 16	Continuity
INT	7 - 16	Continuity
LO	7 - 17	Continuity
HI	8 - 17	Continuity
Washer ON	2 - 11	Continuity

If continuity is not as specified, replace the switch.

Fig 1: Identifying Front Wiper And Washer Switch Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 2: Inspecting Front Wiper Intermittent Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Wiper Intermittent Operation Chart
  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.
  
  Fig 4: Inspecting Front Washer Linked Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Push in the washer switch, and check that the voltage changes as shown in the table.
  
  Fig 5: Washer Linked Operation Diagram
  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

REAR WIPER AND WASHER SWITCH CONTINUITY SPECIFICATIONS

Switch Position	Tester Connection	Specified Condition
Washer 1	2 - 12	Continuity
OFF
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: Identifying Rear Wiper And Washer Switch Terminals

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

Fig 7: Inspecting Wiper Motor Operation (Low Speed)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 8: Inspecting Wiper Motor Operation (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 9: Inspecting Wiper Motor Operation (Stopping At 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.
  If operation is not as specified, replace the motor.
  
  Fig 10: Inspecting Wiper Motor Operation (Stopping At Stop Position) (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.

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 11: Inspecting Washer Motor Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.

If operation is not as specified, replace the motor.

Fig 12: Inspecting Rear Wiper Motor Operation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 13: Inspecting Rear Wiper Motor Operation (Stopping At 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.
  If operation is not as specified, replace the motor.
  
  Fig 14: Inspecting Rear Wiper Motor Operation (Stopping At Stop Position) (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002