Body Integrated Unit Power Supply And Ground Circuit

Check DTC of body integrated unit.

Ref. to BODY CONTROL SYSTEM (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC)

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

Yes:  Repair or replace it according to the DTC.

No:  2

1. Turn the ignition switch to ON.
2. Measure the voltage between body integrated unit and chassis ground.

   Connector & Terminal 

   (B281) No. 3 (+) - Chassis ground (-):

   (B280) No. 32 (+) - Chassis ground (-):

   (B281) No. 6 (+) - Chassis ground (-):

   (B281) No. 7 (+) - Chassis ground (-):

   (i84) No. 6 (+) - Chassis ground (-):

Is the voltage 9 - 16 V?

Yes:  3

No:  Check harness for open circuit between the body integrated unit and the battery or a blown fuse.

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

   Connector & Terminal 

   (B280) No. 1 - Chassis ground:

   (i84) No. 1 - Chassis ground:

Is the resistance less than 1 Ω?

Yes:  4

No:  Repair the open circuit of harness between the body integrated unit and chassis ground.

Is there poor contact of connector?

Yes:  Repair the poor contact.

No:  Check body integrated unit.