Washer Fluid Level Warning Switch Circuit [12/2017 - 10/2023]: Procedure

1. Read the Data List according to the display on the Techstream.

   Refer to DATA LIST / ACTIVE TEST [12/2017 - 10/2020] , or refer to DATA LIST / ACTIVE TEST [10/2020 - 10/2023]

   Body Electrical > Combination Meter > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Washer Level Warning Switch	Level warning switch assembly state	ON or OFF	ON: Washer fluid level low OFF: Washer fluid level not low	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Washer Level Warning Switch

   OK

   The Techstream display changes correctly in response to the washer fluid level.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2023] 

Result: 

NG 

See step  2

1. Disconnect the A level warning switch assembly connector.
2. Inspect the level warning switch assembly.

   Refer to ON-VEHICLE INSPECTION [12/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE LEVEL WARNING SWITCH ASSEMBLY. Refer to  REMOVAL [12/2017 - ] 

Result: 

OK 

See step  3

1. Remove the washer wiring assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Wire Harness Side
   *b	Level Warning Switch Assembly Side

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A17-4 (S) - A-1	Always	Below 1 Ω
   A17-3 (E) - A-2	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE WASHER WIRING ASSEMBLY 

Result: 

OK 

See step  4

1. Disconnect the A17 washer wiring assembly connector.
2. Disconnect the G34 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A17-4 (S) - G34-16 (WLVL)	Always	Below 1 Ω
   A17-3 (E) - Body ground	Always	Below 1 Ω
   A17-4 (S) or G34-16 (WLVL) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2017 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2023] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR