LAN SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC DETECTING CONDITION:

Voltage malfunction caused by poor contact of IGN power supply circuit

TROUBLE SYMPTOM:

Error related to LAN system will not be detected.

NOTE:

B1103 may output when the ignition switch turns to ON with the weak battery condition.

WIRING DIAGRAM:

STEP	CHECK	YES	NO
1.CHECK DTC. Read the DTC of body integrated unit using Subaru Select Monitor.	Is B1103 current malfunction?
2.CHECK DTC. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from body integrated unit and reconnect. 3) Turn the ignition switch to ON. 4) Wait approx. 2 minutes. 5) Read the DTC of body integrated unit using Subaru Select Monitor.	Is B1103 current malfunction?		Repair the harness for open or shorted circuit between body integrated unit and fuse.
3.CHECK FUSE. 1) Turn the ignition switch to OFF. 2) Inspect the fuse.	Is fuse normal?
4.CHECK HARNESS. 1) Disconnect the body integrated unit connector (B280). 2) Measure the voltage between body integrated unit connector and chassis ground using tester. Connector & terminal (B280) No. 1 (+) — Chassis ground (−):	Is the voltage 8.5 — 16.5 V?	Replace the body integrated unit.	Repair or replace the open or shorted circuit between body integrated unit and fuse.
5.CHECK CONNECTOR. 1) Turn the ignition switch to OFF. 2) Disconnect the body integrated unit connector (B280).	Is there poor contact of connector?	Repair or replace the poor contact of connector.	A temporary change of voltage occurred.