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Body Integrated Unit Power Supply And Ground Circuit

Fig 1: Body Integrated Unit Power Supply And Ground Circuit Diagram
G05341791Courtesy of SUBARU OF AMERICA, INC.
DTC CHART

Step Check Yes No
1 CHECK DTC OF BODY INTEGRATED UNIT. 
Check DTC of body integrated unit. <Ref. to OPERATION , Subaru Select Monitor .>		 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. 
  1. Turn the ignition switch to OFF.
  2. 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.
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