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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Security And Locks - Keyless Access (W/Push Button Start) (Diagnostics) >> Diagnostics with Phenomenon >> Inspection >> Can Not Lock When Using The Rear Lock Button

Can Not Lock When Using The Rear Lock Button

CAUTION:
  • Check that there are no other registered access keys inside the vehicle.
  • Check that the keyless access function is not stopped.
  • Inspect LAN system or keyless access system according to the basic diagnostic procedure, and make sure that DTC is not input.
  • When the access key or keyless access CM is replaced, registration of the immobilizer is required. For the relevant procedures, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume. Contact an authorized Subaru Dealership.
  1. CHECK REAR GATE ACTUATOR. 

    While carrying the access key, operate the touch sensor (lock) and touch sensor (unlock).

    When the switch is operated, does the rear gate lock/unlock?

    • Yes  : Go to 2. 
    • No  : Go to  10.
  2. CHECK REAR LOCK BUTTON. 
    1. Using the Subaru Select Monitor, display the data monitor [Rear Gate Request SW] of [Keyless Access with Push Button Start].
    2. Read the data when operating the rear lock button.

    Does the data change between ON/OFF?

    • Yes  : Go to  8.
    • No  : Go to 3. 
  3. CHECK HARNESS. 
    1. Disconnect the rear lock button connector and the keyless access CM connector.
    2. Using a tester, measure the resistance between harness.

      Connector & terminal 

      (D77) No. 3 - (B573) No. 27:

    Is the resistance less than 10 Ω?

    • Yes  : Go to 4. 
    • No  : Repair or replace the open circuit of the harness.
  4. CHECK HARNESS. 

    Using a tester, measure the resistance between harness and chassis ground.

    Connector & terminal 

    (D77) No. 3 - Chassis ground:

    Is the resistance 10 MΩ or more?

    • Yes  : Go to 5. 
    • No  : Repair or replace the short of harness.
  5. CHECK HARNESS. 

    Using a tester, measure the resistance between harness and chassis ground.

    Connector & terminal 

    (D77) No. 4 - Chassis ground:

    Is the resistance less than 10 Ω?

    • Yes  : Go to 6. 
    • No  : Repair or replace the open circuit of the harness.
  6. CHECK REAR LOCK BUTTON. 

    Measure the resistance when the rear lock button is operated using the tester.

    Connector & terminal 

    (D77) No. 3 - (D77) No. 4:

    Did the resistance change from 1 MΩ or more to less than 10 Ω?

  7. CHECK REAR LOCK BUTTON. 
    1. Using the Subaru Select Monitor, display the data monitor [Rear Gate Request SW] of [Keyless Access with Push Button Start].
    2. Read the data when operating the rear lock button.

    Does the data change between ON/OFF?

  8. CHECK WIRING HARNESS. 
    1. Disconnect the exterior rear antenna connector and the keyless access CM connector.
    2. Using a tester, check continuity between the exterior rear antenna connector and keyless access CM connector.

      Connector & terminal 

      (AD23) No. 1 - (B573) No. 2:

      (AD23) No. 2 - (B573) No. 1:

    Is there continuity?

    • Yes  : Go to 9. 
    • No  : Repair or replace the open circuit of harness.
  9. CHECK OUTSIDE REAR ANTENNA. 

    Replace the outside rear antenna with new or properly working parts. Ref. to SECURITY AND LOCKS>Keyless Access Outdoor Antenna>REMOVAL .

    Does it operate properly?

    • Yes  : The outside rear antenna has a failure.
    • No  : Go to 10. 
  10. CHECK BODY INTEGRATED UNIT. 
    1. Connect the disconnected connectors.
    2. Using the Subaru Select Monitor, perform the active test [lock actuator LOCK output] of [Body Control]. Ref. to BODY CONTROL(DIAGNOSTICS)>Active Test .

    Does the rear gate lock actuator lock?

    • Yes  : It is possible that temporary poor communication occurs.
    • No  : Go to 11. 
  11. CHECK HARNESS. 
    1. Disconnect the body integrated unit connector and rear gate lock actuator connector.
    2. Check the continuity between body integrated unit connector and rear gate lock actuator connector.

      Connector & terminal 

      (i171) No. 7 - (D46) No. 1:

    Is there continuity?

    • Yes  : Go to 12. 
    • No  : Repair or replace the open circuit of harness.
  12. CHECK HARNESS. 
    1. Check the continuity between the rear gate lock actuator connector and chassis ground.

      Connector & terminal 

      (D46) No. 2 - Chassis ground:

    Is there continuity?

    • Yes  : Go to 13. 
    • No  : Repair or replace the open circuit of harness.
  13. CHECK REAR GATE LOCK ACTUATOR. 
    1. Check the rear gate lock actuator. Ref. to SECURITY AND LOCKS>Rear Gate Latch and Actuator Assembly>INSPECTION .

    Is the check result OK?

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