Malfunction Indicator Light Does Not Blink

Diagnosis: 

• The malfunction indicator light circuit is open or shorted.
• The delivery (test) mode fuse circuit is open.

Trouble symptom: 

Malfunction indicator light does not blink during Inspection Mode.

Wiring diagram: 

Engine Electrical System Ref. to WIRING SYSTEM>Engine Electrical System>WIRING DIAGRAM

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK STATUS OF MALFUNCTION INDICATOR LIGHT. 
   1. Turn the ignition switch to OFF.
   2. Check the delivery (test) mode fuse is removed.
   3. Turn the ignition switch to ON. (Engine OFF)

   Does the malfunction indicator light illuminate?

   Yes:  Go to  2

   No:  Repair the malfunction indicator light circuit. Ref. to ENGINE (DIAGNOSTICS) (H6DO)>Malfunction Indicator Light>MALFUNCTION INDICATOR LIGHT DOES NOT COME ON 

2. CHECK HARNESS BETWEEN ECM AND DELIVERY (TEST) MODE FUSE. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector from ECM.
   3. Install the delivery (test) mode fuse.
      CAUTION: Do not use any fuses that are installed on the vehicle.
   4. Measure the resistance of harness between ECM connectors.

      Connector & terminal 

      (B134) No. 53 - (B134) No. 6:

   Is the resistance less than 1 Ω?

   Yes:  Go to  3

   No:  Repair the harness and connector.

   NOTE: In this case, repair the following item:
   • Open circuit of harness between ECM connector and delivery (test) mode fuse
   • Poor contact of joint connector
3. CHECK FOR POOR CONTACT. 

   Check for poor contact of ECM connector.

   Is there poor contact of ECM connector?

   Yes:  Repair the poor contact of ECM connector.

   No:  Replace the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H6DO)>ENGINE CONTROL MODULE (ECM)