Check Trunk Opener Switch Circuit

Wiring diagram: 

Door lock control system Ref. to WIRING SYSTEM>DOOR LOCK CONTROL SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK DATA MONITOR  .

   Display the [R Gate Release SW input] data using Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR>OPERATION .

   Does the display switch between [OFF] ←→ [ON] when the trunk opener switch is operated?

   Yes:  The trunk opener switch is normal.

   No:  Go to  2.

2. CHECK HARNESS  .
   1. Disconnect the connectors of body integrated unit and trunk opener switch.
   2. Check the harness between body integrated unit and trunk opener switch.

      Connector & terminal 

      (i82) No. 6 - (i140) No. 1:

   Is harness normal?

   Yes:  Go to  3.

   No:  Repair or replace the harness.

3. CHECK HARNESS  .

   Measure the resistance between trunk opener switch connector and chassis ground.

   Connector & terminal 

   (i140) No. 4 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes:  Go to  4.

   No:  Repair or replace the harness.

4. CHECK TRUNK OPENER SWITCH  .

   Measure the resistance between terminals both when trunk opener switch is pressed and when not pressed.

   Terminals 

   No. 1 - No. 4:

   Is the resistance less than 10 Ω when the switch is pressed and 1 MΩ or more when not pressed?

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

   No:  Replace the trunk opener switch. Ref. to SECURITY AND LOCKS>TRUNK OPENER SWITCH .