Can Not Lock When Using The Rear Lock Button

Trouble causes: 

• Failure of harness between the keyless access control module and rear lock button
• Rear lock button failure
• Failure of harness between the keyless access control module and exterior rear antenna
• Keyless access control module failure
• Exterior rear antenna failure
• Failure of the harness between the body integrated unit and rear gate lock actuator
• Body integrated unit failure
• Rear gate lock actuator failure
  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 with push button start system according to the basic diagnostic procedure, and make sure that DTC is not input.
  • For replacement procedure of keyless access control module, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
  • Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>General Description>CAUTION .

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, check the following items on «Data monitor» of «Keyless Access with Push Button Start».
      • «Rear gate lock/unlock button»
   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 (OPEN CIRCUIT)  .
   1. Disconnect the rear lock button connector and the keyless access control module connector.
   2. Using a tester, measure the resistance between harness.

      Connector & terminal 

      (D77) No. 3 - (i75) No. 17:

   Is the resistance less than 10 Ω?

   Yes: Go to  4 .

   No: Repair or replace the open circuit of the harness.

4. CHECK HARNESS (GROUND SHORT CIRCUIT)  .

   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 (OPEN CIRCUIT)  .

   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 UNIT  .

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

   Terminals 

   No. 3 - No. 4:

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

   Yes: Go to  7 .

   No: Replace the rear lock button. Ref. to SECURITY AND LOCKS>REAR LOCK BUTTON>REMOVAL .

7. CHECK REAR LOCK BUTTON  .
   1. Using the Subaru Select Monitor, check the following items on «Data monitor» of «Keyless Access with Push Button Start». Ref. to KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)>Data Monitor .
      • «Rear gate lock/unlock button»
   2. Read the data when operating the rear lock button.

   Does the data change between ON/OFF?

   Yes: Go to  8 .

   No: Replace the keyless access control module. Ref. to SECURITY AND LOCKS>KEYLESS ACCESS CONTROL MODULE>REMOVAL .

8. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Disconnect the exterior rear antenna connector and the keyless access control module connector.
   2. Using a tester, check continuity between the exterior rear antenna connector and keyless access control module connector.

      Connector & terminal 

      (D45) No. 1 - (i241) No. 8:

      (D45) No. 3 - (i241) No. 7:

   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 .

   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 Subaru Select Monitor, check the following items in «Active Test» of «Body Control». Ref. to BODY CONTROL SYSTEM (DIAGNOSTICS)>FUNCTION CHECK .
       • «lock actuator LOCK output»
    3. Actuate the door lock actuator LOCK output.

    Does the rear gate lock actuator lock?

    Yes: It is possible that temporary poor communication occurs.

    No: Go to  11 .

11. CHECK HARNESS (OPEN CIRCUIT)  .
    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 

       (i266) No. 7 - (D46) No. 1:

    Is there continuity?

    Yes: Go to  12 .

    No: Repair or replace the open circuit of harness.

12. CHECK HARNESS (OPEN CIRCUIT)  .
    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?

    Yes: Replace the body integrated unit. Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .

    No: Replace the rear gate latch and actuator assembly. Ref. to SECURITY AND LOCKS>REAR GATE LATCH AND ACTUATOR ASSEMBLY .