Check Body Integrated Unit Power Supply And Ground Circuit

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 and terminal
  
  (B152) No. 3 (+) - Chassis ground (-):
  
  (B280) No. 1 (+) - Chassis ground (-):
  
  (B281) No. 7 (+) - Chassis ground (-):
  
  (B287) No. 4 (+) - Chassis ground (-):
  
  Is the voltage 9 V or more?
  
  Yes : Go to 2 .
  
  No : Check the harness for open or short circuit between body integrated unit and fuse.
CHECK GROUND CIRCUIT .
Measure the resistance between the body integrated unit connector and chassis ground.

Connector and terminal

(i84) No. 4 - Chassis ground:

(B287) No. 1 - Chassis ground:

Is the resistance less than 10 Ω?

Yes : The power supply and ground circuit are OK.

No : Repair or replace the harness.