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When it stops mid way, do you get two beeps? If so, there is a technical service bulletin (TSB) that was published related to the symptoms. I will attach the TSB for your review.
Here is the TSB. The attached pictures all correlate with the directions.
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BODY - POWER LIFTGATE STOPS DURING OPERATION
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T-SB-0027-15
May 20, 2015
Power Back Door Stops During Operation
Service Category
Vehicle Exterior
Section
Door/Hatch
Market
USA
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Applicability
Introduction
Some 2014 2015 model year Highlander vehicles may exhibit a condition in which the power back door starts to open or close normally, then intermittently stops and beeps twice. In most cases no current DTC is present, but DTC B2226 or B2227 (PBD Unit Pulse Sensor LH/RH Circuit) may be in history. Follow the Repair Procedure in this bulletin to address this condition.
Production Change Information
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This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs shown.
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Warranty Information
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Parts Information
Repair Procedure
1. Set the power back door opening adjustment to position 5 (maximum opening position).
Refer to the Technical Information System (TIS), applicable model and model year Repair Manual:
2014 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door System: Customize Parameters"
2015 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door System: Customize Parameters"
2. Operate the power back door, and confirm the following conditions are met:
The power back door starts to open or close, then stops before fully opening or closing.
Two short beeps are heard when the door stops.
NOTE
The two short beeps heard when the condition occurs match the sound heard when jam protection is activated.
The back door can be opened and closed manually.
Are the conditions mentioned above met?
YES - Continue to step 3.
NO - This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
3. Remove and replace the LH and RH power back door actuators (Unit Assy Set, Power Back Door) with the NEW parts.
Refer to TIS, applicable model and model year Repair Manual:
Removal Procedure:
2014 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door Drive Unit: Removal"
2015 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door Drive Unit: Removal"
Installation Procedure:
2014 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door Drive Unit: Installation"
2015 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door Drive Unit: Installation"
4. Perform the power back door initialization procedure.
Refer to TIS, applicable model and model year Repair Manual:
2014 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door System: Initialization"
2015 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door System: Initialization"
5. Confirm normal operation of the power back door.
Refer to TIS, applicable model and model year Repair Manual:
2014 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door System: Operation Check"
2015 Highlander / Highlander HV:
Vehicle Exterior - Door/Hatch - "Door/Hatch: Power Back Door System: Operation Check"
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Let me know.
Joe
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Saturday, July 27th, 2019 AT 6:47 PM