Diagnostic Procedure

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK DTC. Read the DTC of body integrated unit using Subaru Select Monitor.< Refer to OPERATION , Subaru Select Monitor. >	Is DTC U1300 or U1302 displayed?	Perform the diagnosis according to DTC.	Go to step 2 .
2 CHECK DTC. Read the DTC of body integrated unit using Subaru Select Monitor.	Is U1311 a current malfunction?	Go to step 3 .	Go to step 4 .
3 CHECK DTC. Turn the ignition switch to OFF. Disconnect the combination meter connector (i10). Connect the disconnected connectors. Turn the ignition switch to ON. Read the DTC of body integrated unit using Subaru Select Monitor.	Is U1311 a current malfunction?	Replace the combination meter.< Refer to REMOVAL , Combination Meter. >	Go to step 4 .
4 CHECK HARNESS. Turn the ignition switch to OFF. Shake the harness used for low speed CAN communication circuit. Turn the ignition switch to ON. Read the DTC of body integrated unit using Subaru Select Monitor.	Is U1311 a current malfunction?	Repair or replace the harness.	Go to step 5 .
5 CHECK CONNECTOR. Turn the ignition switch to OFF. Disconnect all connectors (i84, i10, i88, i85 or i50) that are connected to low speed CAN communication line.	Is there poor contact of connector terminal?	Repair the connector terminal, or replace harness.	Temporary communication failure occurs.