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 Refer 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 the combination meter using the Subaru Select Monitor. Refer to COMBINATION METER (DIAGNOSTICS)>READ 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. Refer to INSTRUMENTATION/DRIVER INFO>RELAY AND FUSE .

   Is the check result OK?

   Yes:  Go to  4.

   No:  Replace the defective fuse.

4. CHECK HARNESS. 
   1. Disconnect the combination meter connector.
   2. Turn the ignition switch to ON.
   3. Using the tester, measure the voltage between terminals.

      Connector & terminal 

      (i10) No. 20 (+) - Chassis ground (-):

      (i10) No. 40 (+) - 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.

   Is there poor contact of connector?

   Yes:  Repair or replace the poor contact of connector.

   No:  A temporary change of voltage occurred.