Diagnostic Procedure for Subaru Select Monitor Communication: Inspection: Notes

Diagnosis: 

Subaru Select Monitor communication line is open or shorted.

Trouble symptom: 

Not communicable with Subaru Select Monitor.

Wiring diagram: 

CAN communication system Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>CAN COMMUNICATION SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK SUBARU SELECT MONITOR  .
   1. Connect the Subaru Select Monitor to another vehicle.
   2. Check communication condition between Subaru Select Monitor and vehicle.

   Is communication performed normally?

   Yes:  Go to  2.

   No:  Subaru Select Monitor unit or diagnosis cable is faulty. Or check the fuse on the vehicle side.

2. CHECK DATA LINK CONNECTOR  .

   Use a tester to check for continuity in the ground circuit.

   Connector & terminal 

   (i288) No. 4 - Chassis ground:

   (i288) No. 5 - (B134) No. 50:

   Is there continuity?

   Yes:  Go to  3.

   No:  Repair or replace the open circuit.

3. CHECK DATA LINK CONNECTOR  .
   1. Turn the ignition switch to ON.
   2. Using a tester, check the power supply of data link connector.

      Connector & terminal 

      (i288) No. 8 (+) - Chassis ground (-):

      (i288) No. 16 (+) - Chassis ground (-):

   Is the voltage 10 V or more?

   Yes:  Go to  4.

   No:  Check the power supply circuits to the data link connector.

4. CHECK CENTRAL GATEWAY CONTROL MODULE  .

   Perform the communication for initializing with the central gateway control module by connecting the Subaru Select Monitor.

   Is the communication possible with the central gateway control module?

   Yes:  Go to  5.

   No:  Perform the diagnosis for the central gateway control module. Ref. to CENTRAL GATEWAY (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION .

5. 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 [CAN bus connected ECU], confirmation of minimal connection modules is possible. Ref. to  LAN SYSTEM (DIAGNOSTICS) (HEV)>CAN BUS CHECK  . 

   Is the communication possible with all modules?

   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:  Perform the inspection using the check sheet of communication for initializing. Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION>INSPECTION>CHECK USING THE CHECK SHEET OF COMMUNICATION FOR INITIALIZING .