DTC B1501: Power Supply System Error Detection

DTC detecting condition  :

Open or short in combination meter power supply circuit.

Trouble symptom  :

Defective operation of combination meter.

Failure detection pattern  :

• "Primary" (high-priority diagnosis)

Wiring diagram  :

Combination meter system Ref. to WIRING SYSTEM>COMBINATION METER SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

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 POWER SUPPLY CIRCUIT  .

   Turn the ignition switch to ON, and confirm that the illumination of combination meter lights.

   Does the illumination light?

   Yes  : GO TO  3.

   No  : GO TO  4.

3. CHECK DTC  .

   Read the DTC of [Combination Meter] using the Subaru Select Monitor. Ref. to COMBINATION METER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B1501 displayed? (Current code)

   Yes  : GO TO  4.

   No  : GO TO  6.

4. CHECK FUSE  .
   1. Turn the ignition switch to OFF.
   2. Check the fuse. Ref. to WIRING SYSTEM>COMBINATION METER SYSTEM>WIRING DIAGRAM .

   Is the check result OK?

   Yes  : GO TO  5.

   No  : Replace the defective fuse.

   After replacement, GO TO  7.

5. CHECK HARNESS (POWER SUPPLY CIRCUIT)  .
   1. Disconnect the combination meter connector.
   2. Turn the ignition switch to ON.
   3. Using the tester, measure the voltage between terminals.

      Connector & terminal 

      (i97) No. 1 (+) - Chassis ground (-)  :

      (i97) No. 2 (+) - Chassis ground (-)  :

   Is the voltage 10 - 16 V?

   Yes  : GO TO  6.

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

   After the repair, GO TO  7.

6. CHECK CONNECTOR  .
   1. Turn the ignition switch to OFF.
   2. Disconnect connectors.
   3. Check for poor contact of connector.

   Is the check result OK?

   Yes  : GO TO  7.

   No  : Repair or replace the poor contact of connector.

   After the repair, GO TO  7.

7. CHECK REPAIR  .
   1. Perform the inspection mode corresponding to DTC. Ref. to COMBINATION METER (DIAGNOSTICS)>INSPECTION MODE>OPERATION .
   2. Confirm that DTC or cancel code is not stored and the malfunction is eliminated.

   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 .