Diagnostic Procedure For Subaru Select Monitor Communication: Inspection

Trouble symptom: 

Cannot communicate with [Combination Meter].

Detecting condition: 

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

Wiring diagram: 

• Combination meter system Ref. to WIRING SYSTEM>COMBINATION METER SYSTEM>WIRING DIAGRAM .
• CAN communication system Ref. to WIRING SYSTEM>CAN COMMUNICATION SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK FUSE  .

   Check the fuse.

   Is the fuse OK?

   Yes:  Go to  2 .

   No:  Replace the fuse. If the replaced fuse blows out easily, repair the ground short circuit in the harness between the battery - combination meter.

2. CHECK HARNESS  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector of combination meter.
   3. Turn the ignition switch to ON.
   4. Use a tester to measure the voltage between the combination meter connector and chassis ground.

      Connector and terminal 

      (i10) No. 1 (+) - Chassis ground (-):

      (i10) No. 2 (+) - Chassis ground (-):

   Is the voltage 10 - 13 V?

   Yes:  Go to  3 .

   No:  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 and terminal 

   (i10) No. 40 - Chassis ground:

   Is the resistance less than 1 Ω?

   Yes:  Go to  4 .

   No:  Repair the open circuit of harness between combination meter connector and chassis ground.

4. CHECK LAN SYSTEM  .

   Inspect LAN system. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

   Is the check result OK?

   Yes:  Go to  5 .

   No:  Perform the inspection according to the diagnosis for LAN system.

5. CHECK COMBINATION METER  .
   1. Turn the ignition switch to OFF.
   2. Connect the combination meter connector.
   3. Turn the ignition switch to ON.
   4. Communicate with [Combination Meter] using the Subaru Select Monitor.

   Is communication possible?

   Yes:  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.

   No:  Replace the combination meter. Ref. to INSTRUMENTATION/DRIVER INFO>COMBINATION METER .