Check Hood Switch

Wiring diagram: 

Auto Start Stop Ref. to WIRING SYSTEM>AUTO START STOP>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DATA MONITOR  .

   Display the [Hood Switch Close-side] data using Subaru Select Monitor. Ref. to BODY CONTROL (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  .

   Display the [Hood Switch Open-side] data using Subaru Select Monitor. Ref. to BODY CONTROL (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. Disconnect the connector of body integrated unit.
   2. Disconnect the connector of hood switch.
   3. 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 harness.

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 harness.

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 .