Rear Gate Cannot Be Unlocked With The Rear Gate Opener Button

CAUTION:

Check that there are no other registered access keys inside the rear gate.
Inspect LAN system according to the basic diagnostic procedure, and make sure that there is no fault.
Check that the keyless access function is not stopped.
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.

CHECK KEYLESS OPERATION.
Check that the rear gate unlocks when the rear gate unlock button of the access key is pressed.

Does it operate properly?
- Yes : Go to 6.
- No : For vehicles without power rear gate Go to 2.
  For vehicles with power rear gate Ref. to POWER REAR GATE (DIAGNOSTICS)>Diagnostics with Phenomenon>INSPECTION>PRG OPENER BUTTON DOES NOT FUNCTION .
CHECK REAR GATE UNLOCK OPERATION.
1. Using the Subaru Select Monitor, select the active test [R gate/trunk UNLK output] of [Body Control]. Ref. to BODY CONTROL(DIAGNOSTICS)>Active Test .
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.
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 4.
- No : Repair or replace the open circuit of harness.
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 5.
- No : Repair or replace the open circuit of harness.
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 .
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.
Does it operate properly?
- Yes : Go to 7.
- No : Replace the access key. Ref. to SECURITY AND LOCKS>Access Key>REPLACEMENT .
CHECK DATA MONITOR.
1. Using the Subaru Select Monitor, display the data monitor [R Gate Release SW input] of [Body Control]. Ref. to BODY CONTROL(DIAGNOSTICS)>Data Monitor .
2. Read the data when pressing the rear gate opener button.
Does the data display ON?
- Yes : Go to 14.
- No : Go to 8.
CHECK WIRING HARNESS.
1. Disconnect the rear gate opener button connector and body integrated unit connector.
2. Using a tester, check the continuity between the rear gate opener button connector and body integrated unit connector.
  Connector & terminal
  
  (D77) No. 5 - (i84) No. 10:
Is there continuity?
- Yes : Go to 9.
- No : Repair or replace the open circuit of harness.
CHECK WIRING HARNESS.
1. Using a tester, check the continuity between the rear gate opener button connector and chassis ground.
  Connector & terminal
  
  (D77) No. 6 - Chassis ground:
Is there continuity?
- Yes : Go to 10.
- No : Repair or replace the open circuit of harness.
CHECK REAR GATE OPENER BUTTON.
Using a tester, check the continuity between rear gate opener button connector terminals.

Connector & terminal

(D77) No. 5 - (D77) No. 6:

Is there continuity when pressing the switch?
- Yes : Go to 11.
- No : Replace the rear gate opener button. Ref. to SECURITY AND LOCKS>Rear Gate Opener Button>REMOVAL .
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 12.
- No : Repair or replace the open circuit of harness.
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 13.
CHECK DATA MONITOR.
1. Display the data monitor R gate lock status SW of body integrated unit using Subaru Select Monitor. Ref. to BODY CONTROL(DIAGNOSTICS)>Data Monitor .
2. Read the data when locking/unlocking the rear gate lock actuator.
Does the data change as ON ←→ OFF?
- Yes : Go to 14.
- No : Check body integrated unit. Ref. to SECURITY AND LOCKS>Body Integrated Unit>REMOVAL .
CHECK KEYLESS ACCESS SYSTEM CHECK.
1. Using the Subaru Select Monitor, select the system check Rear gate external transmitter, interior tuner of [Keyless Access with Push Button Start]. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>Keyless Access System Check .
2. Hold the access key 1 m or more away from the trunk, then come closer to within 0.8 m.
Does the outside buzzer sound?
- Yes : System is normal.
- No : Replace the keyless access CM. Ref. to SECURITY AND LOCKS>Keyless Access CM>REMOVAL .