Wiper and Washer Switch Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Switch / Data List.
5. Read the display on the Techstream.
   COMBINATION SWITCH (WINDSHIELD WIPER SWITCH ASSEMBLY)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Front Washer Switch	Front washer switch / ON or OFF	ON: Front washer switch ON OFF: Front washer switch OFF	-
   Front Wiper Mist Switch	Front wiper MIST switch / ON or OFF	ON: Front wiper switch in MIST OFF: Wiper switch not in MIST	-
   Front Wiper Auto Switch	Front wiper AUTO switch / ON or OFF	ON: Front wiper switch in AUTO position OFF: Wiper switch not in AUTO position	-
   Front Wiper Hi Switch	Front wiper HI switch / ON or OFF	ON: Front wiper switch in HI OFF: Wiper switch not in HI	-
   Front Wiper Lo Switch	Front wiper LO switch / ON or OFF	ON: Front wiper switch in LO OFF: Wiper switch not in LO	-
   Ignition Switch Signal	Engine switch signal / ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	-
   Wiper Volume Position	Front wiper volume (sensitivity) / 0 to 90 degrees	0 degrees: FR wiper volume "+" position 27 degrees: Switch is turned one notch towards the "-" side from the FR wiper volume "+" position 63 degrees: Switch is turned one notch towards the "+" side from the FR wiper volume "-" position 90 degrees: FR wiper volume "-" position	If the value is NG, replace the windshield wiper switch assembly. Refer to COMPONENTS [08/2012 - ] .

NG → See step   2 

OK → See step   3 

1. Disconnect the J26 windshield wiper switch assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   J26-1 (B) - J26-5 (E)	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4