Battery Short Inspection

Wiring diagram:

CAN communication system <Ref. to WIRING DIAGRAM , CAN Communication System.>

Fig 1: Data Link Connector Communication Diagram - (Main-CAN; 1 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Power Steering Communication Diagram (2 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

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

Step	Check	Yes	No
1 CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (B40) No. 6 - Chassis ground: (B40) No. 14 - Chassis ground:	Is the voltage 5 V or less?	Currently, it is normal.	Go to step 2 .
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 voltage change to 5 V or less?	Replace the control module whose voltage has changed. When the value changed at disconnecting the body integrated unit, Go to step 3 .	Repair or replace the short circuit of the harness between body integrated unit and ECM.
3 CHECK BETWEEN MAIN WIRING HARNESSES. Using the tester, measure the voltage between terminals. Connector & terminal (i171) No. 22 - Chassis ground: (i171) No. 2 - Chassis ground:	Is the voltage 5 V or less?	Replace the body integrated unit. <Ref. to REMOVAL , Body Integrated Unit.>	Repair or replace the short circuit of the harness between ECM and body integrated unit.

Wiring diagram:

CAN communication system <Ref. to WIRING DIAGRAM , CAN Communication System.>

Fig 3: Keyless Access Communication Diagram

Courtesy of SUBARU OF AMERICA, INC.

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

Step	Check	Yes	No
1 CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. Turn the ignition switch to ON. Using the tester, measure the voltage between terminals. Connector & terminal (i188) No. 5 - Chassis ground: (i188) No. 6 - Chassis ground:	Is the voltage 5 V or less?	Currently, it is normal.	Go to step 2 .
2 CHECK CONTROL MODULE. With the tester connected, disconnect control module. NOTE: Disconnect the body integrated unit at the end. Connector & terminal (i188) No. 5 - Chassis ground: (i188) No. 6 - Chassis ground:	Did the voltage change to 5 V or less?	Replace the control module whose voltage has changed. When the value changed at disconnecting the body integrated unit, Go to step 3 .	Repair or replace the short circuit of the harness between body integrated unit and impact sensor.
3 CHECK BETWEEN MAIN WIRING HARNESSES. Using the tester, measure the voltage between terminals. Connector & terminal (B281) No. 31 - Chassis ground: (B281) No. 15 - Chassis ground:	Is the voltage 5 V or less?	Replace the body integrated unit. <Ref. to REMOVAL , Body Integrated Unit.>	Repair or replace the short circuit of the harness between ECM and body integrated unit.