Washer Fluid Level Warning 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 / Body No. 5 / Data List.
5. Read the display on the Techstream.
   BODY NO. 5 (FRONT CONTROLLER)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Washer Level Switch	Washer fluid level switch / ON or OFF	ON: Washer jar is empty OFF: Washer jar is full	-

NG → See step   2 

OK → See step   4 

HINT: 

The following check should be performed with the windshield washer motor and pump installed to the washer jar.

1. Fill the washer jar with washer fluid.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (S) - 2 (E)	Fluid volume is more than 700 to 900 ml	10 kΩ or higher
   1 (S) - 2 (E)	Fluid volume is less than 700 to 900 ml	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Level Warning Switch Assembly)

NG → See step   5 

OK: Go to next step 

1. Disconnect the 2F front controller connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2F-7 - A1-1 (S)	Always	Below 1 Ω
   A1-2 (E) - Body ground	Always	Below 1 Ω
   2F-7 - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Level Warning Switch Assembly)
   *2	Front view of wire harness connector (to Front Controller)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE FRONT CONTROLLER (MULTIPLEX NETWORK BODY ECU)