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Check Power Supply And Ground Circuit

WARNING: This page is about a different car, the 2016 Subaru Outback and 2016 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK POWER SUPPLY. 
  1. Disconnect the connector of body integrated unit.
  2. Measure the voltage between the body integrated unit connector and chassis ground.

    Connector & terminal 

    (B280) No. 4 (+) - Chassis ground (-): 

    (B280) No. 7 (+) - Chassis ground (-): 

    (B281) No. 32 (+) - Chassis ground (-): 

 Is the voltage 9 V or more? Go to step 2  . Check the harness for open or short circuit between body integrated unit and fuse.
2 CHECK GROUND CIRCUIT. 
Measure the resistance between the body integrated unit connector and chassis ground.
Connector & terminal 
(i84) No. 4 - Chassis ground: 
(B280) No. 2 - Chassis ground: 		 Is the resistance less than 10 Ω? The power supply and ground circuit are OK. Repair or replace the harness.
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