Low Washer Warning Light Always Illuminates

Trouble symptom: 

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

Wiring diagram: 

Front wiper and washer system Refer to WIRING SYSTEM>Front Wiper and Washer System>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. BASIC INSPECTION  .

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

   Is the check result OK?

   Yes  : Go to  2.

   No  : Repair the defective portion.

2. CHECK CAN COMMUNICATION  .
   1. Turn the ignition switch to ON.
   2. Read the DTC of [Combination Meter] using the Subaru Select Monitor. Refer to  DIAGNOSTIC TROUBLE CODE (DTC)  .

   Are any DTCs for Front relay control module displayed?

   Yes  : Perform the diagnosis for the displayed DTCs. Refer to  DIAGNOSTIC TROUBLE CODE (DTC)  .

   No  : Go to  3.

3. CHECK DATA MONITOR  .

   Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Front Relay Control Module]. Refer to FRONT RELAY CONTROL MODULE (DIAGNOSTICS)>DATA MONITOR .

   • Washer Level Sensor Input

   Is [OFF] displayed?

   Yes  : Perform the inspection according to the diagnosis for combination meter. Refer to COMBINATION METER (DIAGNOSTICS)>Basic Diagnostic Procedure>PROCEDURE .

   If defective is not improved, replace Front relay control module. Refer to BODY CONTROL/COMMUNICATION SYSTEM>FRONT RELAY CONTROL MODULE .

   No  : Go to  4.

4. 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  5.

5. CHECK HARNESS (GROUND SHORT CIRCUIT)  .
   1. Disconnect the washer fluid level sensor connector (B102).
   2. Using a tester, measure the resistance between Front relay control module connector (B68) and chassis ground.

      Connector & terminal 

      (B68) No. 14 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  6.

   No  : Repair or replace the short circuit of the harness.

6. CHECK WASHER FLUID LEVEL SENSOR  .

   Check the washer fluid level sensor. Refer to WIPER AND WASHER SYSTEMS>WASHER TANK AND MOTOR .

   Is the check result OK?

   Yes  : Replace Front relay control module. Refer to BODY CONTROL/COMMUNICATION SYSTEM>FRONT RELAY CONTROL MODULE .

   No  : Replace the washer level sensor. Refer to WIPER AND WASHER SYSTEMS>WASHER TANK AND MOTOR .