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Home >> Subaru >> 2004 >> Forester XT, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 176 (Security And Locks) >> Security System >> Inspection >> Check Interrupt Relay Circuit
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Check Interrupt Relay Circuit

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 INTERRUPT RELAY CIRCUIT

Step Check Yes No
1 : CHECK INTERRUPT RELAY. 
Remove and check the interrupt relay. < Ref. to INTERRUPT RELAY . >		 Is the interrupt relay OK? Go to step 2.  Replace the interrupt relay.
2 : CHECK POWER SUPPLY FOR INTERRUPT RELAY. 
Measure the voltage between the interrupt relay harness connector terminal and chassis ground.
Connector & terminal 
(B59) No. 1 (+) - chassis ground (-): 		 Is the voltage more than 10 V when ignition switch is turned to START? Go to step 3.  Check the harness for open circuits and shorts between the interrupt relay and ignition switch.
3 : CHECK HARNESS BETWEEN INTERRUPT RELAY AND SECURITY CONTROL UNIT. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the security control unit harness connector.
  3. Measure the resistance between the interrupt relay harness connector terminal and security control unit harness connector terminal.

Connector & terminal 
(B59) No. 4 - (B93) No. 15: 		 Is the resistance less than 10 ohm? Replace the security control unit. Check the harness for open circuits and shorts between the interrupt relay and security control unit.
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