Battery Short Inspection

Wiring diagram: 

CAN communication system Ref. to WIRING SYSTEM>CAN Communication System>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the steering angle sensor connector.
   3. Turn the ignition switch to ON.
   4. Using the tester, measure the voltage between terminals.

      Connector & terminal 

      (B231) No. 2 (+) - Chassis ground (-):

      (B231) No. 3 (+) - Chassis ground (-):

   Is the voltage less than 5 V?

   Yes: Currently, it is normal.

   No: Go to  2

2. CHECK CONTROL MODULE  .

   With the tester connected, disconnect control module.

   NOTE: Disconnect the body integrated unit at the end.

   Connector & terminal 

   (B231) No. 2 (+) - Chassis ground (-):

   (B231) No. 3 (+) - Chassis ground (-):

   Did the voltage change less than 5 V?

   Yes: Replace the control module whose voltage has changed. When the value changed at disconnecting the body integrated unit, Go to  3

   No: Repair or replace the short circuit of the harness between body integrated unit and ECM.

3. CHECK BETWEEN MAIN WIRING HARNESSES  .

   Using the tester, measure the voltage between terminals.

   Connector & terminal 

   (B281) No. 20 (+) - Chassis ground (-):

   (B281) No. 28 (+) - Chassis ground (-):

   Is the voltage less than 5 V?

   Yes: Replace the body integrated unit. Ref. to SECURITY AND LOCKS>Body Integrated Unit .

   No: Repair or replace the short circuit of the harness between VDC CONTROL MODULE and body integrated unit.