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Check Power Supply And Ground Circuit

CHECKING POWER SUPPLY AND GROUND CIRCUIT

Step Check Yes No
1 : CHECK POWER SUPPLY. 
  1. Disconnect the security control unit harness connector.
  2. Measure the voltage between the harness connector terminal and chassis ground.

Connector & terminal 
(B93) No. 13 (+) - chassis ground (-): 		 Is the voltage more than 10 V? Go to step 2.  Check the harness for open circuits and shorts between the security control unit and fuse.
2 : CHECK GROUND CIRCUIT. 
Measure the resistance between the harness connector terminal and chassis ground.
Connector & terminal 
(B93) No. 14 - chassis ground: 		 Is the resistance less than 10 ohm? The power supply and ground circuit are OK. Repair the harness.
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