Communication For Initializing Impossible: Wiring Diagram

WARNING: This page is about a different car, the 2015 Subaru Outback and 2015 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

CAN communication system <Ref. to COMPUTER DATA LINES (Legacy), COMPUTER DATA LINES (Outback), CAN Communication System.>

Fig 1: Communication For Initializing Impossible - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTICS PROCEDURE

Step	Check	Yes	No
1 CHECK SUBARU SELECT MONITOR. Connect the Subaru Select Monitor to another vehicle. Check communication condition between Subaru Select Monitor and vehicle.	Is communication performed normally?	Go to step 2.	Subaru Select Monitor unit or diagnosis cable is faulty. Or check the fuse on the vehicle side.
2 CHECK COMMUNICATION FOR INITIALIZING ERROR. Perform the communication for initializing with each module by connecting the Subaru Select Monitor. (For systems whose module can communicate with diagnostic devices) NOTE: By performing «Confirmation of CAN bus connection to ECU (MainBus)», confirmation of minimal connection modules is possible. <Ref. to CAN BUS ECU COMMUNICATION CHECK .>	Is the communication possible with all modules?	Go to step 3.	Perform the inspection using the check sheet of communication for initializing. <Ref. to CHECK USING THE CHECK SHEET OF COMMUNICATION FOR INITIALIZING , COMMUNICATION FOR INITIALIZING IMPOSSIBLE, Subaru Select Monitor.>
3 CHECK DATA LINK CONNECTOR. Use a tester to check for continuity in the ground circuit. Connector & terminal (B40) No. 4 - Chassis ground: (B40) No. 5 - (B134) No. 53:	Is there continuity?	Go to step 4.	Repair or replace the open circuit.
4 CHECK DATA LINK CONNECTOR. Turn the ignition switch to ON. Using a tester, check the power supply of data link connector. Connector & terminal (B40) No. 8 (+) - Chassis ground (-): (B40) No. 16 (+) - Chassis ground (-):	Is the voltage 10 V or more?	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.	Check the power supply circuits to the data link connector.