Battery Short Inspection

• MAIN-CAN

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

      (i74) No. 2 (+) - Chassis ground (-):

      (i74) No. 3 (+) - Chassis ground (-):

   Is the voltage 5 V or less?

   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

   (i74) No. 2 (+) - Chassis ground (-):

   (i74) No. 3 (+) - Chassis ground (-):

   Did the voltage change to 5 V or less?

   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

   (i171) No. 22 (+) - Chassis ground (-):

   (i171) No. 2 (+) - Chassis ground (-):

   Is the voltage 5 V or less?

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

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

• BODY-CAN

Wiring diagram: 

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

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 impact sensor connector.
   3. Turn the ignition switch to ON.
   4. Using the tester, measure the voltage between terminals.

      Connector & terminal

      (i188) No. 5 (+) - Chassis ground (-):

      (i188) No. 6 (+) - Chassis ground (-):

   Is the voltage 5 V or less?

   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

   (i188) No. 5 (+) - Chassis ground (-):

   (i188) No. 6 (+) - Chassis ground (-):

   Did the voltage change to 5 V or less?

   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 impact sensor.

3. CHECK BETWEEN MAIN WIRING HARNESSES.

   Using the tester, measure the voltage between terminals.

   Connector & terminal

   (B281) No. 31 (+) - Chassis ground (-):

   (B281) No. 15 (+) - Chassis ground (-):

   Is the voltage 5 V or less?

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

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