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.

Courtesy of SUBARU OF AMERICA, INC.

NOTE: Main wiring harness or related lines may be shorted to ground, or shorted to ground in one of the control modules.

CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS .
1. Turn the ignition switch to OFF.
2. Disconnect the steering sensor connector.
3. Using a tester, measure the resistance between the steering 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.
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.
CHECK BETWEEN MAIN WIRING HARNESSES .
Measure the resistance between body integrated unit connector and chassis ground using tester.

Connector & terminal

(i171) No. 1 - Chassis ground:

(i171) 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.

NOTE: Main wiring harness or related lines may be shorted to ground, or shorted to ground in one of the control modules.

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.
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.
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 .