Fuel Level Warning Light Illuminates Despite Of Sufficient Fuel

Trouble causes  :

• CAN communication failure
• Fuel level sensor malfunction
• Combination meter malfunction

1. BASIC INSPECTION  .

   Before performing the diagnosis, perform basic inspection. Ref. to COMBINATION METER (DIAGNOSTICS)>GENERAL DESCRIPTION>INSPECTION .

   NOTE:

   • Check the battery and its installation condition.
   • Check the related fuse.
   • Visually check that the related connectors are properly connected.

     Also, check the related ground terminal for looseness and corrosion.

   Is the check result OK?

   Yes  : GO TO  2.

   No  : Repair the defective part.

2. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Read the DTC of [Combination Meter] using the Subaru Select Monitor. Ref. to COMBINATION METER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B1500 displayed? (Current code)

   Yes  : Perform the diagnosis for the displayed DTCs. Ref. to COMBINATION METER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

   After the repair, GO TO  5.

   No  : GO TO  3.

3. CHECK DTC  .
   1. Start the engine.
   2. Using the Subaru Select Monitor, read all DTCs. Ref. to LAN SYSTEM (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC of U-code displayed? (Current code)

   Yes  : Perform the diagnosis according to the basic diagnostic procedure in LAN SYSTEM (DIAGNOSTICS). Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   After the repair, GO TO  5.

   No  : GO TO  4.

4. CHECK FUEL LEVEL WARNING LIGHT  .

   Using the Subaru Select Monitor, check the following items in the [Active Test] of [Combination Meter]. Ref. to COMBINATION METER (DIAGNOSTICS)>ACTIVE TEST .

   • Remaining fuel warning

   Do the indicated amount on Subaru Select Monitor and the fuel level warning light indication match?

   Yes  : Check the fuel level sensor as a single part. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>FUEL LEVEL SENSOR>INSPECTION . Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>FUEL SUB LEVEL SENSOR>INSPECTION .

   After the repair, GO TO  5.

   No  : Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER .

   After replacement, GO TO  5.

5. CHECK REPAIR  .

   Perform operation check to check if the trouble has been solved.

   Is the check result OK?

   Yes  : Finish the diagnosis.

   No  : Perform the diagnosis according to the basic diagnostic procedure. Ref. to COMBINATION METER (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .