DTC B1103 Ignition Power Failure: Wiring Diagram

Shift lock control system. Refer to appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Shift Lock Control System - Wiring Diagram

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Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK DTC. Read the DTC of body integrated unit using Subaru Select Monitor.	Is B1103 current malfunction?	Go to step 2 .	Go to step 5 .
2 CHECK DTC. Turn the ignition switch to OFF. Disconnect and then connect the body integrated unit connector. Wait approx. 2 minutes. Turn the ignition switch to ON. Read the DTC of body integrated unit using Subaru Select Monitor.	Is B1103 current malfunction?	Go to step 3 .	Go to step 5 .
3 CHECK FUSE. Turn the ignition switch to OFF. Check the fuse.	Is the fuse OK?	Go to step 4 .	Replace the defective fuse.
4 CHECK HARNESS. Disconnect the body integrated unit connector. Using the tester, measure the voltage between terminals. Connector & terminal (i171) No. 17 (+) - Chassis ground (-):	Is the voltage 8.5 - 16.5 V?	Replace the body integrated unit. Refer to REMOVAL , Body Integrated Unit.	Repair the harness between body integrated unit and fuse.
5 CHECK CONNECTOR. Turn the ignition switch to OFF. Disconnect the body integrated unit connector.	Is there poor contact of connector?	Repair or replace the poor contact of connector.	A temporary change of voltage occurred.