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Home >> Subaru >> 2004 >> Forester XT, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 176 (Security And Locks) >> Keyless Entry System >> Inspection >> Check Output Signal To Body Integrated Unit
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Check Output Signal To Body Integrated Unit

WARNING: This page is about a different car, the 2005 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
CHECKING OUTPUT SIGNAL TO BODY INTEGRATED UNIT

Step Check Yes No
1 : CHECK OUTPUT SIGNAL. 
Measure the voltage between the keyless entry control unit harness connector terminal and chassis ground when UNLOCK/DISARM button of transmitter is pressed.
Connector & terminal 
(B176) No. 2 (+) - Chassis ground (-): 		 Is the voltage more than 10 V? Go to step 2.  Replace the keyless entry control unit.
2 : CHECK OUTPUT SIGNAL. 
Measure the voltage between the keyless entry control unit harness connector terminal and chassis ground when LOCK/ARM button of transmitter is pressed.
Connector & terminal 
(B176) No. 1 (+) - Chassis ground (-): 		 Is the voltage more than 10 V? Go to step 3.  Replace the keyless entry control unit.
3 : CHECK HARNESS BETWEEN KEYLESS ENTRY CONTROL UNIT AND BODY INTEGRATED UNIT. 
  1. Disconnect the keyless entry control unit harness connector and body integrated unit harness connector.
  2. Measure the resistance between the keyless entry control unit harness connector terminal and body integrated unit harness connector terminal.

Connector & terminal 
(B176) No. 1 - (B281) No. 13: 
(B176) No. 2 - (B281) No. 14: 		 Is the resistance less than 10 ohm? Replace the body integrated unit. Check the harness for open circuit or shorts between the keyless entry control unit and body integrated unit.
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