53 - 61 Ω: Wiring diagram

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

• Non-turbo model

Fig 1: CAN Communication System Wiring Diagram Non-Turbo Model (1 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: CAN Communication System Wiring Diagram Non-Turbo Model (2 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

Fig 3: CAN Communication System Wiring Diagram Turbo Model (1 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

Fig 4: CAN Communication System Wiring Diagram Turbo Model (2 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. 

   Using the tester, measure the resistance between terminals.

   Connector & terminal 

   (B40) No. 6 - Chassis ground:

   (B40) No. 14 - Chassis ground:

   Is the resistance less than 10 Ω?

   • Yes  : Go to 2. 
   • No  : Go to  4.
2. CHECK CONTROL MODULE. 

   With the tester connected, disconnect control module.

   NOTE: Disconnect the body integrated unit at the end.

   Connector & terminal 

   (B40) No. 6 - Chassis ground:

   (B40) No. 14 - 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 harness between body integrated unit and ECM.
3. CHECK MAIN WIRING HARNESS AND RELATED LINES. 

   Using the tester, measure the resistance between terminals.

   Connector & terminal 

   (B281) No. 20 - Chassis ground:

   (B281) No. 28 - Chassis ground:

   Is the resistance less than 10 Ω?

   • Yes  : Repair or replace the short circuit of the harness between VDC Control Module and body integrated unit.
   • No  : Replace the body integrated unit. Ref. to SECURITY AND LOCKS>Body Integrated Unit>REMOVAL .
4. CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. 
   1. Turn the ignition switch to ON.
   2. Using the tester, measure the voltage between terminals.

      Connector & terminal 

      (B40) No. 6 - Chassis ground:

      (B40) No. 14 - Chassis ground:

   Is the voltage less than 5 V?

   • Yes  : CAN communication circuit is normal.
   • No  : Go to 5. 
5. CHECK CONTROL MODULE. 

   With the tester connected, disconnect control module.

   NOTE: Disconnect the body integrated unit at the end.

   Connector & terminal 

   (B40) No. 6 - Chassis ground:

   (B40) No. 14 - 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 6. 
   • No  : Repair or replace the short circuit of the harness between body integrated unit and ECM.
6. CHECK HARNESS. 

   Using a tester, measure the voltage between terminals and chassis ground.

   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>REMOVAL .
   • No  : Repair or replace the short circuit of the harness between VDC Control Module and body integrated unit.