Low Washer Warning Light Is Always Off

Trouble symptom:

Low washer fluid warning light is not displayed, even when the washer fluid level is low.

Wiring diagram:

Front wiper and washer system Ref. to WIRING SYSTEM>FRONT WIPER AND WASHER SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>General Description>CAUTION .

BASIC INSPECTION .
Perform "Basic inspection" of Front relay control module. Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>General Description>INSPECTION .

Is the check result OK?

Yes: Go to 2 .

No: Repair the defective portion.
CHECK DATA MONITOR .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Front Relay Control Module]. Ref. to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>DATA MONITOR .
  - Washer Level Sensor Input
  Is [ON] displayed?
  
  Yes: Perform the inspection according to the diagnosis for combination meter. Ref. to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .
  
  If defective is not improved, replace Front relay control module. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>FRONT RELAY CONTROL MODULE .
  
  No: Go to 3 .
CHECK CONNECTOR .
1. Turn the ignition switch to OFF.
2. Disconnect Front relay control module connector (B68).
  Is there poor contact of connector?
  
  Yes: Repair or replace the poor contact of connector.
  
  No: Go to 4 .
CHECK INPUT CIRCUIT OF Front relay control module .
1. Connect the Front relay control module connector (B68).
2. Turn the ignition switch to ON.
3. Using a tester, measure the voltage between washer fluid level sensor connector (B102) and chassis ground.
  Connector & terminal
  
  (B102) No. 1 (+) - Chassis ground (-):
  
  Is the voltage 9 - 16 V?
  
  Yes: Go to 5 .
  
  No: Replace Front relay control module. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>FRONT RELAY CONTROL MODULE .
CHECK HARNESS (OPEN CIRCUIT) .
1. Turn the ignition switch to OFF.
2. Disconnect Front relay control module connector (B68).
3. Disconnect the washer fluid level sensor connector.
4. Using a tester, measure the resistance between Front relay control module connector (B68) and washer fluid level sensor connector (B102).
  Connector & terminal
  
  (B68) No. 14 - (B102) No. 1:
  
  Is the resistance less than 10 Ω?
  
  Yes: Go to 6 .
  
  No: Repair or replace the open circuit of harness.
CHECK HARNESS (OPEN CIRCUIT) .
Using a tester, measure the resistance between washer fluid level sensor connector (B102) and chassis ground.

Connector & terminal

(B102) No. 2 - Chassis ground:

Is the resistance less than 10 Ω?

Yes: Replace the washer level sensor. Ref. to WIPER AND WASHER SYSTEMS>WASHER TANK AND MOTOR .

No: Repair or replace the open circuit of harness.