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Check Rear Gate Release Actuator Operation

WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.
Step Check Yes No
1 CHECK REAR GATE RELEASE ACTUATOR OPERATION. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the key warning switch harness connector.
  3. Prepare the Subaru Select Monitor kit.
  4. Turn the ignition switch to ON (engine OFF), and run the "Application for Subaru Select Monitor III".
  5. On the System Selection Menu, select the {Integ. Unit mode}.
  6. Select the {Current Data Display & Save}.
  7. Check the rear gate release output signal of body integrated unit when operating the LOCK/UNLOCK button of keyless transmitter.
Is output signal is present when operating the transmitter LOCK/UNLOCK button? Go to step 2.  Check the body integrated unit. Refer to BASIC DIAGNOSTIC PROCEDURE Basic Diagnostic Procedure.
2 CHECK CIRCUIT OF REAR GATE RELEASE ACTUATOR. 
  1. Disconnect the harness connector of body integrated unit (i84).
  2. Disconnect the rear gate release actuator harness connector (D140).
  3. Measure the resistance between harness connectors.

Connector & terminal 
(i84) No. 22 - (D140) No. 1: 
Is the resistance less than 10 Ω? Go to step 3.  Repair the harness.
3 CHECK CIRCUIT OF HAZARD LIGHT. 
  1. Check the ground circuit of rear gate release actuator
  2. Disconnect the rear gate release actuator harness connector (D140).
  3. Measure the resistance between harness connector terminal and chassis ground.

Connector & terminal 
(D140) No. 2 - Chassis ground: 
Is the resistance less than 10 Ω? Check the rear gate lock actuator. Refer to INSPECTION , Rear Gate Latch Assembly. Repair the harness.