Battery Short Inspection

Wiring diagram: 

CAN communication system Refer 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 to 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. Refer 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.