Communication For Initializing Impossible

Detecting condition:

Defective harness connector
Power supply circuit malfunction
Defective combination meter
Defective CAN communication circuit
Defective Subaru Select Monitor

Trouble symptom:

Communication is impossible between combination meter and Subaru Select Monitor.

Wiring diagram:

NOTE: For the coupling connector, refer to "WIRING SYSTEM".

Combination meter system Ref. to WIRING DIAGRAM , Combination Meter System.
CAN communication system Ref. to WIRING DIAGRAM CAN Communication System.

Fig 1: Combination Meter Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK FUSE. Check the fuse.	Is the check result OK?	Go to step 2 .	Replace the fuse. If the replaced fuse blows out easily, repair the ground short circuit in the harness between the battery and combination meter.
2 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the connector of combination meter. Turn the ignition switch to ON. Use a tester to measure the voltage between the combination meter connector and chassis ground. Connector & terminal (i10) No. 1 (+) - Chassis ground (-): (i10) No. 2 (+) - Chassis ground (-):	Is the voltage 10 - 13 V?	Go to step 3 .	Repair the open circuit of harness between combination meter connector and fuse.
3 CHECK HARNESS Use a tester to measure the resistance between the combination meter connector and chassis ground. Connector & terminal (i10) No. 20 - Chassis ground: (i10) No. 40 - Chassis ground:	Is the resistance less than 1 Ω?	Go to step 4 .	Repair the open circuit of harness between combination meter connector and chassis ground.
4 CHECK LAN SYSTEM. Inspect LAN system. Ref. to BASIC DIAGNOSTIC PROCEDURE .	Is the check result OK?	Go to step 5 .	Perform the inspection according to the diagnosis for LAN system.
5 CHECK COMBINATION METER. Turn the ignition switch to OFF. Connect the combination meter connector. Communicate with the combination meter using the Subaru Select Monitor.	Is communication possible?	The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.	Replace the combination meter. Ref. to COMBINATION METER .