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 DIAGRAM , Combination Meter System.

Fig 1: Power Supply System Error Detection - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK POWER SUPPLY CIRCUIT . Turn the ignition switch to ON, and confirm that the illumination of combination meter lights.	Does the illumination light?	Go to step 2 .	Go to step 3 .
2 CHECK DTC . Read the DTC of the combination meter using the Subaru Select Monitor. Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .	Is DTC B1501 a current malfunction?	Go to step 3 .	Go to step 5 .
3 CHECK FUSE . Turn the ignition switch to OFF. Check the fuse. Ref. to Relay and Fuse .	Is the fuse OK?	Go to step 4 .	Replace the defective fuse.
4 CHECK HARNESS . Turn the ignition switch to OFF. Disconnect the combination meter connector. 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?	Go to step 5 .	Repair the open circuit of harness or replace harness.
5 CHECK CONNECTOR . Turn the ignition switch to OFF. Disconnect connectors.	Is there poor contact of connector?	Repair or replace the poor contact of connector.	Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.