Ground Short Inspection (Bus "B" (Smart System Can)): Wiring Diagram

CAN communication system. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: 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.

Step	Check	Yes	No
1 CHECK BETWEEN MAIN WIRING HARNESSES. 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?	Go to step 2 .	Currently, it is normal.
2 CHECK CONTROL MODULE. With the tester connected, disconnect control module. Connector & terminal (B280) No. 11 - Chassis ground: (B280) No. 21 - Chassis ground:	Did the resistance change to 10 Ω or more?	Replace the control module whose resistance has changed.	Repair or replace the short circuit of the main wiring harness and related lines between body integrated unit and keyless access CM.