Washer Fluid Level Warning Switch Circuit: Procedure

1. Check the Data List for proper functioning of the washer fluid level warning switch.

   OK

   The display is as specified in the normal condition.

   FRONT LIGHT ECU:
   
   

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

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

NG: Go to next step 

1. Remove the warning switch.
   Fig 1: Inspecting Washer Fluid Level Warning Switch

   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 (SLR+) - 2 (E)	Washer jar and tank is empty	Below 1 Ω
   1 (SLR+) - 2 (E)	Washer jar and tank is full	10 kΩ or higher

NG → REPLACE WASHER FLUID LEVEL WARNING SWITCH 

OK: Go to next step 

1. Disconnect the A2 switch connector.
   Fig 2: Checking Harness And Connector (Warning Switch - Front Light ECU And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A52 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A2-1 (SLR1+) - A52-13 (WLVL)	Always	Below 1 Ω
   A2-2 (E) - Body ground	Always	Below 1 Ω
   A2-1 (SLR+) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE