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. Using the tester, measure the voltage between terminals.

      Connector and terminal 

      (i10) No. 1 (+) - Chassis ground (-):

      (i10) 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.