Check Hood Switch

Wiring diagram: 

Security system Ref. to WIRING SYSTEM>SECURITY SYSTEM>WIRING DIAGRAM

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DATA MONITOR  .
   1. Turn the ignition switch to ON.
   2. Using Subaru Select Monitor, display [Hood Switch Close-side] in [Data monitor] of [Body Control]. Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR

   Does the display switch between [OFF] ←→ [ON] when the front hood is opened ←→ closed?

   Yes  : The hood switch is OK.

   No  : Go to  2.

2. CHECK DATA MONITOR  .

   Using Subaru Select Monitor, display [Hood Switch Open-side] in [Data monitor] of [Body Control]. Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR

   Does the display switch between [ON] ←→ [OFF] when the front hood is opened ←→ closed?

   Yes  : The hood switch is OK.

   No  : Go to  3.

3. CHECK HARNESS  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the connector of body integrated unit.
   3. Disconnect the connector of hood switch.
   4. Measure the resistance of harness between body integrated unit and hood switch.

      Connector & terminal 

      (B73) No. 3 - (B103) No. 1:

      (B73) No. 4 - (B103) No. 3:

   Is the resistance less than 10 Ω?

   Yes  : Go to  4.

   No  : Repair or replace the defective part.

4. CHECK HARNESS  .

   Measure the resistance between the hood switch and chassis ground.

   Connector & terminal 

   (B103) No. 2 - Chassis ground (-):

   Is the resistance less than 10 Ω?

   Yes  : Go to  5.

   No  : Repair or replace the defective part.

5. CHECK HOOD SWITCH  .

   Check the hood switch. Ref. to SECURITY AND LOCKS>FRONT HOOD LOCK ASSEMBLY>INSPECTION 

   Is the hood switch normal?

   Yes  : Replace the body integrated unit. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT

   No  : Replace the lock assembly front hood. Ref. to SECURITY AND LOCKS>FRONT HOOD LOCK ASSEMBLY