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

Wiring diagram: 

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

Courtesy of SUBARU OF AMERICA, INC.

1. 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  2 .

   No:  Go to  3 .

2. 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 malfunction)

   Yes:  Go to  3 .

   No:  Go to  5 .

3. CHECK FUSE  .
   1. Turn the ignition switch to OFF.
   2. Check the fuse. Ref. to INSTRUMENTATION/DRIVER INFO>RELAY AND FUSE .

   Is the check result OK?

   Yes:  Go to  4 .

   No:  Replace the defective fuse.

4. 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 and terminal 

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

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

   Is the voltage 8.5 - 16.5 V?

   Yes:  Go to  5 .

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

5. 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:  A temporary change of voltage occurred.

   No:  Repair or replace the poor contact of connector.