WIPER SWITCH (for Sedan): Inspection

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT WIPER SWITCH

Check the resistance.

Measure the resistance and check the results in accordance with the value(s) in the tables below.

Standard Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
+B (B-2) -+1 (B-3)	MIST	Below 1 Ω
+S (B-1) -+ 1 (B-3)	OFF	Below 1 Ω
+S (B-1) -+ 1 (B-3)	INT	Below 1 Ω
+B (B-2) - +1 (B-3)	LO	Below 1 Ω
+B (B-2) -+ 2 (B-4)	HI	Below 1 Ω

Fig 1: Identifying Wiper Switch Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, replace the wiper switch.

Standard Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
EW (A-2) - WF (A-3)	OFF	10 kΩ or higher
EW (A-2) - WF (A-3)	ON	Below 1 Ω

If the result is not as specified, replace the wiper switch.

Check the intermittent operation.
1. Connect the positive (+) voltmeter terminal to terminal 3 (+1) of the B connector and the negative (-) voltmeter terminal to terminal 2 (EW) of the A connector.
2. Connect the positive (+) battery lead to terminal 2 (+B) of the B connector and the negative (-) battery lead to terminals 2 (EW) of the A connector and 1 (+S) of the B connector.
3. Turn the wiper switch to the INT position.
4. Connect the positive (+) battery lead to terminal 1 (+S) of the B connector for 5 seconds.
5. Connect the negative (-) battery lead to terminal 1 (+S) of the B connector. Operate the intermittent wiper relay and check the voltage between terminals 3 (+1) of the B connector and 2 (EW) of the A connector.
  Standard:
  
  Refer to the illustration below.
  
  Fig 2: Checking Intermittent Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, replace the windshield wiper switch.
Check the operation (front washer).
1. Turn the wiper switch off.
2. Connect the positive (+) battery lead to terminal 2 (+B) of the B connector and the negative (-) battery lead to terminals 1 (+S) of the B connector and 2 (EW) of the A connector.
3. Connect the positive (+) voltmeter terminal to terminal 3 (+1) of the B connector and the negative (-) voltmeter terminal to terminal 2 (EW) of the A connector. Turn the washer switch on and off, and check the voltage between terminals 3 (+1) of the B connector and 2 (EW) of the A connector.
  
  Fig 3: Checking Front Washer Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, replace the windshield wiper switch.