Check Power Supply And Ground Circuit

DIAGNOSIS PROCEDURE CHART

Step	Check	Yes	No
1 CHECK POWER SUPPLY OF BODY INTEGRATED UNIT. Prepare the Subaru Select Monitor kit. Turn the ignition switch to ON (engine OFF) and run the "PC application for Subaru Select Monitor". On the «System Selection Menu» display, select the {Integ. unit mode}. Select the {Current Data Display}. Check the following data display.	Is the data display 10 V or more (BATT voltage (Control), BATT voltage (BACKUP))?	Body integrated unit is normal.	Go to step 2.
2 CHECK POWER SUPPLY. Disconnect the harness connector of body integrated unit. Measure the voltage between harness connector terminal and chassis ground. Connector & terminal (i84) No. 34 (+) - Chassis ground (-): (B280) No. 7 (+) - Chassis ground (-): (B281) No. 2 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Go to step 3.	Check the harness for open or short circuit between body integrated unit and fuse.
3 CHECK GROUND CIRCUIT. Measure the resistance between harness connector terminal 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 10 Ω?	Replace the body integrated unit. Ref. to BODY INTEGRATED UNIT .	Repair or replace the harness.