LEMON Manuals: Even more car manuals for everyone
Home >> Subaru >> 2013 >> Legacy Premium, Automatic CVT Trans >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> LAN Communication System (Diagnostics) >> CAN Communication Circuit Check >> Procedure >> Bus "B" (Smart System Can) >> Wiring Diagram

Bus "B" (Smart System Can): Wiring Diagram

CAN communication system. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: CAN Communication System - Wiring Diagram
G08585505Courtesy of SUBARU OF AMERICA, INC.
Step Check Yes No
1 CHECK FROM BODY INTEGRATED UNIT CONNECTOR. 
  1. Disconnect the body integrated unit connector.
  2. Using the tester, measure the resistance between terminals.

    Connector & terminal 

    (B280) No. 11 - Chassis ground: 

    (B280) No. 21 - Chassis ground: 

Is the resistance 10 Ω or less? Check for ground short. Refer to GROUND SHORT INSPECTION (BUS "B" (SMART SYSTEM CAN)) . Go to step .
2 CHECK FROM BODY INTEGRATED UNIT CONNECTOR. 
  1. Turn the ignition switch to ON.
  2. Using the tester, measure the voltage between terminals.

    Connector & terminal 

    (B280) No. 11 - Chassis ground: 

    (B280) No. 21 - Chassis ground: 

Is the voltage 5 V or less? Go to step . Check for battery short. Refer to BATTERY SHORT INSPECTION (BUS "B" (SMART SYSTEM CAN)) .
3 CHECK FROM BODY INTEGRATED UNIT CONNECTOR. 
  1. Turn the ignition switch to OFF.
  2. Using the tester, measure the resistance between terminals.

    Connector & terminal 

    (B280) No. 11 - No. 21: 

Is the resistance 56 Ω or less? Perform the inspection for the resistance of 56 Ω or less. Refer to 56 Ω OR LESS . Go to step .
4 CHECK FROM BODY INTEGRATED UNIT CONNECTOR. 
Using the tester, measure the resistance between terminals.
Connector & terminal 
(B280) No. 11 - No. 21: 
Is the resistance 64 Ω or more? Perform the inspection for the resistance of 64 Ω or more. Refer to 64 Ω OR MORE . If the display of CAN system U-code disappears from the current malfunction, the CAN network is currently normal. If the U-code has detected as current malfunction, related lines may be open. Perform the inspection for the related line corresponding to the detected DTC. Refer to LIST .