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Check Interrupt Relay Circuit

WARNING: This page is about a different car, the 2006 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
CHECK 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 
(B422) No. 5 (+) - 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 KEYLESS ENTRY CONTROL UNIT. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the keyless entry control unit harness connector.
  3. Measure the resistance between the interrupt relay harness connector terminal and keyless entry control unit harness connector.

    Connector & terminal 

    (B422) No. 1 - (B176) No. 12: 

 Is the resistance less than 10 Ω? Replace the keyless entry control unit. Check the harness for open circuits and shorts between the interrupt relay and keyless entry control unit.
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