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Check Door Lock Actuator & Circuit

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 HARNESS (DOOR LOCK). 
Measure the resistance between body integrated unit and each door lock actuator.
Connector & terminal 
(i84) No. 7 - (D72) No. 2: (front door LH) 
(i84) No. 7 - (D18) No. 2: (front door RH) 
(i84) No. 7 - (D26) No. 2: (rear door LH) 
(i84) No. 7 - (D32) No. 2: (rear door RH) 
Is the resistance less than 10 Ω? Go to step 2.  Repair or replace the harness.
2 CHECK HARNESS (DOOR UNLOCK). 
Measure the resistance between body integrated unit and each door lock actuator.
Connector & terminal 
(i84) No. 23 - (D72) No. 4: (front door LH) 
(i84) No. 8 - (D18) No. 4: (front door RH) 
(i84) No. 8 - (D26) No. 4: (rear door LH) 
(i84) No. 8 - (D32) No. 4: (rear door RH) 
Is the resistance less than 10 Ω? Go to step 3.  Repair or replace the harness.
3 CHECK HARNESS (REAR GATE UNLOCK). 
Measure the resistance between the body integrated unit and rear gate lock actuator.
Connector & terminal 
(i84) No. 22 - (D140) No. 1: 
Is the resistance less than 10 Ω? Go to step 4.  Repair or replace the harness.
4 CHECK HARNESS (REAR GATE UNLOCK). 
Measure the resistance between the rear gate lock actuator and chassis ground.
Connector & terminal 
(D140) No. 2 - Chassis ground: 
Is the resistance less than 10 Ω? Go to step 5.  Repair or replace the harness.
5 CHECK BODY INTEGRATED UNIT. 
Measure the voltage between the connector terminals of the body integrated unit when moving the door lock switch to LOCK.
Connector & terminal 
Except for front door LH 
(i84) No. 7 (+) - (i84) No. 8 (-): 
Front door LH 
(i84) No. 7 (+) - (i84) No. 23 (-): 
Does the voltage change from less than 1.0 V → 9 V or more? (During lock output) Go to step 6.  Replace the body integrated unit. Refer to Body Integrated Unit .
6 CHECK BODY INTEGRATED UNIT. 
Measure the voltage between the connector terminals of the body integrated unit when moving the door lock switch to UNLOCK.
Connector & terminal 
Except for front door LH 
(i84) No. 8 (+) - (i84) No. 7 (-): 
Front door LH 
(i84) No. 23 (+) - (i84) No. 7 (-): 
Does the voltage change from less than 1.0 V → 9 V or more? (During unlock output) Go to step 7.  Replace the body integrated unit. Refer to Body Integrated Unit .
7 CHECK BODY INTEGRATED UNIT. 
Measure the voltage between body integrated unit and chassis ground when moving the rear gate opener button.
Connector & terminal 
(i84) No. 22 (+) - Chassis ground (-): 
Does the voltage change from less than 1.0 V → 9 V or more? (During unlock output) Go to step 8.  Replace the body integrated unit. Refer to Body Integrated Unit .
8 CHECK DOOR LOCK ACTUATOR. 
Check the door lock actuator.
  • Front door lock actuator Refer to INSPECTION , Front Door Latch and Door Lock Actuator Assembly.
  • Rear door lock actuator Refer to INSPECTION , Rear Door Latch and Door Lock Actuator Assembly.
Is the door lock actuator OK? Go to step 9.  Replace the door latch and door lock actuator assembly.
9 CHECK REAR GATE LOCK ACTUATOR. 
Check the rear gate lock actuator. Refer to Rear Gate Latch Assembly .
Is the rear gate lock actuator normal? Check the harness for open or short circuits between the body integrated unit and rear gate lock actuator. Replace the rear gate latch assembly.