Ground 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. Use a tester to measure the resistance between the steering angle sensor connector and chassis ground.

      Connector & terminal 

      (i74) No. 2 - Chassis ground:

      (i74) No. 3 - Chassis ground:

      Is the resistance less than 10 Ω?

      Yes  : Go to  2.

      No  : Currently, it is normal.

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 resistance change to 10 Ω or more?

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

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

3. CHECK BETWEEN MAIN WIRING HARNESSES  .

   Measure the resistance between body integrated unit connector and chassis ground using tester.

   Connector & terminal 

   (i 171) No. 1 - Chassis ground:

   (i 171) No. 2 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes  : Repair or replace the short circuit of the main wiring harness and related lines between ECM - body integrated unit.

   No  : Replace the body integrated unit. Ref. to SECURITY AND LOCKS>Body Integrated Unit>REMOVAL .

• 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 audio or navigation unit connector.
   3. Using a tester, measure the resistance between audio or navigation unit connector and chassis ground.

      Connector & terminal 

      (i87) No. 9 - Chassis ground:

      (i87) No. 10 - Chassis ground:

      Is the resistance less than 10 Ω?

      Yes  : Go to  2.

      No  : Currently, it is normal.

2. CHECK CONTROL MODULE  .

   With the tester connected, disconnect control module.

   NOTE: Disconnect the body integrated unit at the end.

   Connector & terminal 

   (i87) No. 9 - Chassis ground:

   (i87) No. 10 - Chassis ground:

   Did the resistance change to 10 Ω or more?

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

   No  : Repair or replace the short circuit of the main wiring harness and related lines between body integrated unit - combination meter.

3. CHECK BETWEEN MAIN WIRING HARNESSES  .

   Measure the resistance between body integrated unit connector and chassis ground using tester.

   Connector & terminal 

   (B281) No. 17 - Chassis ground:

   (B281) No. 19 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes  : Repair or replace the short circuit of the main wiring harness and related lines between combination meter - body integrated unit.

   No  : Replace the body integrated unit. Ref. to SECURITY AND LOCKS>Body Integrated Unit>REMOVAL .