Wiper Switch: Inspection

WARNING: This page is about a different car, the 2007 Toyota Tacoma. 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 TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard: Wiper Switch

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
+B (E7-2) - +1 (E7-3)	MIST	Below 1 Ω
+S (E7-1) - +1 (E7-3)	OFF	Below 1 Ω
+S (E7-1) - +1 (E7-3)	INTO	Below 1 Ω
+B (E7-2) - +1 (E7-3)	LO	Below 1 Ω
+B (E7-2) - +2 (E7-4)	HI	Below 1 Ω

Fig 1: Identifying Wiper Switch Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard: Washer Switch

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
EW (E11-2) - WF (E11-3)	OFF	10 kΩ or higher
EW (E11-2) - WF (E11-3)	ON	Below 1 Ω

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

Check the intermittent operation.
1. Connect the voltmeter positive terminal to terminal 3 (+1) of the E7 connector and the voltmeter negative terminal to terminal 2 (EW) of the E11 connector.
2. Connect the battery positive (+) lead to terminal 2 (+B) of the E7 connector and the battery negative (-) lead to terminals 2 (EW) of the E11 connector and 1 (+S) of the E7 connector.
3. Turn the wiper switch to the INT position.
4. Connect the battery positive (+) lead to terminal 1 (+S) of the E7 connector for 5 seconds.
5. Connect the battery negative lead to terminal 1 (+S) of the E7 connector. Operate the intermittent wiper relay and check the voltage between terminals 3 (+1) of the E7 connector and 2 (EW) of the E11 connector.
  
  Fig 2: Identifying Driving Pattern (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Check the operation

Fig 3: Identifying Driving Pattern (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Turn the wiper switch off.
2. Connect the battery positive lead to terminal 2 (+B) of the E7 connector and the battery negative lead to terminals 1 (+S) of the E7 connector and 2 (EW) of the E11 connector.
3. Connect the voltmeter positive terminal to terminal 3 (+1) of the E7 connector and the voltmeter negative terminal to terminal 2 (EW) of the E11 connector. Turn the washer switch on and off, and check the voltage between terminals 3 (+1) of the E7 connector and 2 (EW) of the E11 connector.