Washer Fluid Level Warning Switch Circuit: Procedure

1. Check the Data List for proper functioning of the washer fluid level warning switch. Refer to DATA LIST / ACTIVE TEST [09/2012 - ] .

   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 pump are empty OFF: Washer jar and pump are full	-

NG → See step   2 

OK → See step   4 

1. Disconnect the A2 switch 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
   1 (SLR+) - 2 (E)	Washer jar and pump is empty	Below 1 Ω
   1 (SLR+) - 2 (E)	Washer jar and pump is full	10 kΩ or higher

   HINT: 

   When the fluid volume is between 600 and 800 cc (36.6 cu.in. and 48.8 cu.in.) the level warning switch may be on or off.

NG → See step   5 

OK: Go to next step 

1. Disconnect the A2 switch connector.

   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 → REPLACE FRONT LIGHT ECU (FRONT CONTROLLER)