Rear Gate Cannot Be Unlocked With The Rear Gate Opener Button

Trouble causes: 

• Malfunction of harness between the body integrated unit and rear gate lock actuator
• Body integrated unit malfunction
• Rear gate lock actuator malfunction
• Access key malfunction
• Malfunction of harness between body integrated unit and rear gate opener button
• Rear gate opener button malfunction
• Malfunction of harness between keyless access control module and exterior rear antenna
• Keyless access control module malfunction
• Exterior rear antenna malfunction

1. CHECK KEYLESS OPERATION  .

   Check that the rear gate unlocks when the rear gate open button of the access key is pressed.

   Does it operate properly?

   Yes  : Go to  6.

   No  : Go to  2.

2. CHECK REAR GATE UNLOCK OPERATION  .
   1. Using the Subaru Select Monitor, check the following items in the [Active Test] of [Body Control]. Ref. to BODY CONTROL (DIAGNOSTICS)>ACTIVE TEST .
      • [R gate/trunk UNLK output]
   2. Check that the rear gate unlocks when [R gate/trunk UNLK output] is output.

   Does it operate properly?

   Yes  : Go to  6.

   No  : Go to  3.

3. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Disconnect the body integrated unit connector and rear gate lock actuator connector.
   2. Measure the resistance between body integrated unit connector and rear gate lock actuator connector.

      Connector & terminal 

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

   Is the resistance less than 10 Ω?

   Yes  : Go to  4.

   No  : Repair or replace the open circuit of harness.

4. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Measure the resistance between the rear gate lock actuator connector and chassis ground.

      Connector & terminal 

      (D46) No. 2 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes  : Go to  5.

   No  : Repair or replace the open circuit of harness.

5. 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 .

6. CHECK ACCESS KEY  .
   1. Prepare all access keys registered to the vehicle.
   2. Check that the rear gate lock can be unlocked with each access key.

   Is the check result OK?

   Yes  : Go to  7.

   No  : Replace the access key. Ref. to SECURITY AND LOCKS>Access Key>REPLACEMENT .

7. CHECK DATA MONITOR  .
   1. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Body Control]. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .
      • [R Gate Release SW input]
   2. Read the data when pressing the rear gate opener button.

   Does the data display ON?

   Yes  : Go to  14.

   No  : Go to  8.

8. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Disconnect the rear gate opener button connector and body integrated unit connector.
   2. Using a tester, measure the resistance between the rear gate opener button connector and body integrated unit connector.

      Connector & terminal 

      (D77) No. 1 - (il71) No. 6:

   Is the resistance less than 10 Ω?

   Yes  : Go to  9.

   No  : Repair or replace the open circuit of harness.

9. CHECK HARNESS (OPEN CIRCUIT)  .
   1. Using a tester, measure the resistance between the rear gate opener button connector and chassis ground.

      Connector & terminal 

      (D77) No. 2 - Chassis ground:

   Is the resistance less than 10 Ω?

   Yes  : Go to  10.

   No  : Repair or replace the open circuit of harness.

10. CHECK REAR GATE OPENER BUTTON  .

    Using a tester, measure the resistance between rear gate opener button connector terminals.

    Terminals 

    No. 1 - No. 2:

    Is the resistance less than 10 Ω when switch is pushed?

    Yes  : Go to  11.

    No  : Replace the rear gate opener button. Ref. to SECURITY AND LOCKS>REAR GATE OPENER BUTTON .

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

       Connector & terminal 

       (R299) No. 1 - (i241) No. 8:

       (R299) No. 2 - (i241) No. 7:

    Is the resistance less than 10 Ω?

    Yes  : Go to  12.

    No  : Repair or replace the open circuit of harness.

12. CHECK OUTSIDE REAR ANTENNA  .

    Replace the outside rear antenna with new or properly working parts.

    Does it operate properly?

    Yes  : The outside rear antenna has a failure.

    No  : Go to  13.

13. CHECK DATA MONITOR  .
    1. Using the Subaru Select Monitor, check the following items in the [Data Monitor] of [Body Control]. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .
       • [R gate lock status SW input]
    2. Read the data when locking/unlocking the rear gate lock actuator.

    Does the data change from ON <-> OFF?

    Yes  : Go to  14.

    No  : Check body integrated unit. Ref. to SECURITY AND LOCKS>Body Integrated Unit>REMOVAL .

14. CHECK KEYLESS ACCESS SYSTEM CHECK  .
    1. Using the Subaru Select Monitor, check the following items in the [Keyless Access with Push Button Start Check] of [Keyless Access with Push Button Start]. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>KEYLESS ACCESS WITH PUSH BUTTON START CHECK .
       • [R gate external transmitter - internal tuner]
    2. Hold the access key 1 m or more away from the rear gate opener button, then come closer to within 0.8 m.

    Does the outside buzzer sound?

    Yes  : The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

    NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

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