Washer Fluid Level Warning Switch Circuit [08/2019 - ]: Procedure

1. Use the Data List to check if the level warning switch assembly is functioning properly.

   Refer to DATA LIST / ACTIVE TEST [08/2019 - ] 

   COMBINATION METER
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Washer Switch	Level warning switch assembly signal / ON or OFF	ON: Fluid volume is less than 550 to 750 cc (33.6 to 45.8 cu.in.) OFF: Fluid volume is more than 550 to 750 cc (33.6 to 45.8 cu.in.)	-

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2019 - ]  

Result: 

NG 

See step  2

1. Remove the level warning switch assembly.

   Refer to REMOVAL [08/2015 - ]

2. Inspect the level warning switch assembly.

   Refer to INSPECTION [08/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE LEVEL WARNING SWITCH ASSEMBLY. Refer to  REMOVAL [08/2015 - ] 

Result: 

OK 

See step  3

1. Disconnect the A20 and B washer wiring assembly connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A20-3 (S) - B-1	Always	Below 1 Ω
   A20-6 (E) - B-2	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE WASHER WIRING ASSEMBLY 

Result: 

OK 

See step  4

1. Disconnect the A20 washer wiring assembly connector.
2. Disconnect the G3 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A20-3 (S) - G3-30 (WLVL)	Always	Below 1 Ω
   A20-6 (E) - Body ground	Always	Below 1 Ω
   A20-3 (S) or G3-30 (WLVL) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [08/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR