Body Integrated Unit Power Supply And Ground Circuit

NOTE: For the DC power supply circuit, refer to "WIRING DIAGRAMS". Ref. to POWER DISTRIBUTION , Power Supply Circuit .

Fig 1: Power Supply Circuit Diagram

G06651702

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK DTC OF BODY INTEGRATED UNIT. Check DTC of body integrated unit.	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 ON. Measure the voltage between body integrated unit and chassis ground. Connector & terminal (i84) No. 6 (+) - Chassis ground (-): (i171) No. 17 (+) - Chassis ground (-): (i171) No. 25 (+) - Chassis ground (-): (B281) No. 6 (+) - Chassis ground (-):	Is the voltage 9 - 16 V?	Go to step 3 .	Check the harness for open or short circuit between body integrated unit and battery, and check the fuses.
3 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 (B280) No. 1 - Chassis ground: (B281) No. 31 - Chassis ground: (i84) No. 1 - Chassis ground: (i171) No. 29 - Chassis ground:	Is the resistance less than 1 Ω?	Go to step 4 .	Repair the open circuit of harness between the body integrated unit and chassis ground.
4 CHECK FOR POOR CONTACT.	Is there poor contact of connector?	Repair the poor contact.	End.