Washer Fluid Level Warning Switch Circuit: Procedure

1. Use the Data List to check if the level warning switch is functioning properly. Refer to DATA LIST/ACTIVE TEST .
   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Washer Switch	Level warning switch/ON or OFF	ON: Washer jar and tank empty OFF: Washer jar and tank full	-

   OK

   On the Techstream screen, item changes between ON and OFF according to the above chart.

NG → See step   3 

OK: Go to next step 

1. Operate the Techstream according to the display and select Active Test. Refer to DATA LIST/ACTIVE TEST .
   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Indicat. Lamp Washer	Washer level warning light	ON/OFF	-

   OK

   Washer level warning light condition can be switched by Active Test.

NG → See step   5 

OK: Go to next step 

1. Remove the level warning switch. Refer to REMOVAL .
   Fig 1: Inspecting Level Warning Switch Assembly

   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
   1 - 2	Fluid volume is more than 900 cc (54.9 cu.in.)	10 kΩ or higher
   1 - 2	Fluid volume is less than 500 cc (30.5 cu.in.)	Below 1 Ω

   HINT: 

   When the fluid volume is between 500 and 900 cc (30.5 and 54.9 cu.in.), the level warning switch may be on or off.

NG → See step   6 

OK: Go to next step 

1. Disconnect the A17 level warning switch connector.
2. Disconnect the C50 combination meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A17-1 (S) - C50-15 (WLVL)	Always	Below 1 Ω
   A17-2 (E) - Body ground	Always	Below 1 Ω
   A17-1 (S) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5