Body Integrated Unit Power Supply And Ground Circuit

Fig 1: Body Integrated Unit Power Supply And Ground Circuit - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSIS PROCEDURE

Step	Check	Yes	No
1 CHECK DTC OF BODY INTEGRATED UNIT. Check DTC of the body integrated unit. < Refer to OPERATION , Read Diagnostic Trouble Code (DTC). >	Is the DTC of power line displayed on body integrated unit?	Repair or replace it according to the DTC.	Go to step 2.
2 CHECK HARNESS CONNECTOR BETWEEN BODY INTEGRATED UNIT AND CHASSIS GROUND. Turn the ignition switch to OFF. Measure the harness resistance between the body integrated unit and chassis ground. Connector & terminal (i84) No. 21 - Chassis ground: (B280) No. 22 - Chassis ground: (B281) No. 8 - Chassis ground: (B281) No. 9 - Chassis ground:	Is the resistance less than 1 Ω?	Go to step 3.	Repair the open circuit of harness between the body integrated unit and chassis ground.
3 CHECK POOR CONTACT.	Is there poor contact in connector?	Repair the poor contact.	Check the body integrated unit.

Step

Check

Yes

1 CHECK DTC OF BODY INTEGRATED UNIT.
Check DTC of the body integrated unit. < Refer to OPERATION , Read Diagnostic Trouble Code (DTC). >

Is the DTC of power line displayed on body integrated unit?

Repair or replace it according to the DTC.

Go to step 2.

2 CHECK HARNESS CONNECTOR BETWEEN BODY INTEGRATED UNIT AND CHASSIS GROUND.

Turn the ignition switch to OFF.
Measure the harness resistance between the body integrated unit and chassis ground.

Connector & terminal

(i84) No. 21 - Chassis ground:

(B280) No. 22 - Chassis ground:

(B281) No. 8 - Chassis ground:

(B281) No. 9 - Chassis ground:

Is the resistance less than 1 Ω?

Go to step 3.

Repair the open circuit of harness between the body integrated unit and chassis ground.

3 CHECK POOR CONTACT.

Is there poor contact in connector?

Repair the poor contact.

Check the body integrated unit.