Check Door Lock Switch

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  .
   1. Turn the ignition switch to ON.
   2. Using Subaru Select Monitor, display [Manual lock SW input] in [Data monitor] of [Body Control]. Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR .

   Does the display change as [OFF] ←→ [ON] when the door lock switch is moved to LOCK?

   Yes:  Go to  2.

   No:  Go to  3.

2. CHECK DATA MONITOR  .

   Using Subaru Select Monitor, display [Manual unlock SW input] in [Data monitor] of [Body Control]. Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR .

   Does the display change as [OFF] ←→ [ON] when the door lock switch is moved to UNLOCK?

   Yes:  The door lock switch is OK.

   No:  Go to  3.

3. CHECK DOOR LOCK SWITCH  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the door lock switch connector.
   3. Check the door lock switch. Ref. to SECURITY AND LOCKS>DOOR LOCK SWITCH>INSPECTION .

   Is the door lock switch normal?

   Yes:  Go to  4.

   No:  Replace the following faulty parts.

   • Driver's side: Replace the power window main switch. Ref. to GLASS/WINDOWS/MIRRORS>POWER WINDOW CONTROL SWITCH .
   • Passenger's side: Replace the door lock switch. Ref. to SECURITY AND LOCKS>DOOR LOCK SWITCH .
4. CHECK HARNESS  .

   Measure the resistance between the door lock switch connector and chassis ground.

   Connector & terminal 

   Driver's side 

   (Df34) No. 6 - Chassis ground:

   Passenger's side 

   (Df33) No. 3 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes:  Go to  5.

   No:  Repair or replace the defective part.

5. CHECK HARNESS  .
   1. Turn the ignition switch to ON.
   2. Check the harness between body integrated unit and door lock switch.

      Connector & terminal 

      Driver's side 

      (Df34) No. 19 (+) - Chassis ground (-):

      (Df34) No. 20 (+) - Chassis ground (-):

      Passenger's side 

      (Df33) No. 7 (+) - Chassis ground (-):

      (Df33) No. 22 (+) - Chassis ground (-):

   Is the voltage 6 V or more?

   Yes:  Check the connector.

   No:  Go to  6.

6. CHECK F/B  .
   1. Remove the body integrated unit. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT>REMOVAL .
   2. Measure the resistance between the F/B terminals.

      Connector & terminal 

      F/B No. 17 - (i281) No. 51:

      F/B No. 17 - (i281) No. 41:

      F/B No. 19 - (i281) No. 30:

      F/B No. 19 - (i282) No. 20:

   Is harness normal?

   Yes:  Check the connector.

   If there is no abnormality, replace the body integrated unit. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>BODY INTEGRATED UNIT .

   No:  Replace the F/B.