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 the combination meter using the Subaru Select Monitor. Ref. 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. 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  .
   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.