Ground Short Inspection (Bus "A" (Main-Can)): Wiring Diagram

CAN communication system. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: CAN Communication System - Wiring Diagram (Main-CAN)

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 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 10 Ω or less?	Go to step 2 .	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 (B40) No. 6 - Chassis ground: (B40) No. 14 - Chassis ground:	Did the resistance change to 10 Ω or more?	Replace the control module whose resistance has changed.	When the value changed at disconnecting the body integrated unit, Go to step 3 . Repair or replace the short circuit of the main wiring harness and related lines between body integrated unit and VDC CM.
3 CHECK BETWEEN MAIN WIRING HARNESSES. Using the tester, measure the resistance between terminals. Connector & terminal (i84) No. 27 - Chassis ground: (i84) No. 35 - Chassis ground:	Is the resistance 10 Ω or less?	Repair or replace the short circuit of the main wiring harness and related lines between body integrated unit and ECM.	Replace the body integrated unit. Refer to REMOVAL .