Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VK6G
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: Auto Down Operation does not Fully Open Power Window (Catch Protection Function is Activated); 2016 - 2020 MY Sienna [12/2015 -        ]

Auto Down Operation does not Fully Open Power Window (Catch Protection Function is Activated)

DESCRIPTION

If a door glass or a power window regulator motor assembly does not operate smoothly, the catch protection function may be triggered automatically, resulting in the auto down operation being unable to fully open the window.

CAUTION / NOTICE / HINT

NOTICE:

  • If a power window regulator motor assembly has been replaced with a new one, initialize the power window control system (See page 2016 - 2020 MY Sienna [12/2015 -        ]; WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: INITIALIZATION ).
  • If a power window regulator motor assembly and door window regulator sub-assembly have been removed and installed, or if a power window regulator motor assembly was reused when a door glass or door glass run was replaced, initialize the power window control system (See page 2016 - 2020 MY Sienna [12/2015 -        ]; WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: INITIALIZATION ).

HINT:

This symptom may occur for any of the windows.

PROCEDURE

1.

PERFORM INITIALIZATION (APPLICABLE LOCATION)

(a) Initialize the power window regulator motor assembly (applicable location) (See page 2016 - 2020 MY Sienna [12/2015 -        ]; WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: INITIALIZATION ).

NEXT

2.

CHECK POWER WINDOW CONTROL SYSTEM ((AUTO UP / DOWN FUNCTION (APPLICABLE LOCATION))

(a) Check that each power window moves when the auto up and down function of the multiplex network master switch assembly, power window regulator switch assembly, rear power window regulator switch assembly LH or rear power window regulator switch assembly RH is operated (See page 2016 - 2020 MY Sienna [12/2015 -        ]; WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: OPERATION CHECK ).

OK:

Auto up and down function is normal (applicable location).

OK

END (PROBLEM DUE TO INITIALIZATION FAILURE)
NG

3.

CHECK WINDOW GLASS SLIDING MOVEMENT (APPLICABLE LOCATION)

(a) Remove the window regulator.

(b) Install the window glass to the door glass run.

(c) Check if the door window regulator operates smoothly.

(d) Check that the window glass slides smoothly when sliding it down by hand.

CAUTION:

Perform initialization again.

HINT:

Ensure the following:

  • The window glass fits with the glass run without improper contact or deformation.
  • Foreign matter is not caught in the glass run.
  • The glass run is not misaligned.
  • The belt moulding or inner weatherstrip is not caught.
  • The glass is not tilted and does not catch.

OK:

Door window glass slides smoothly.

Result

Result

Proceed to

NG

A

OK (Driver side power window)

B

OK (Front passenger side power window)

C

OK (Rear LH side power window)

D

OK (Rear RH side power window)

E
A

FIT WINDOW GLASS CORRECTLY (REMOVE FOREIGN OBJECTS CAUSING IMPROPER FIT OR REPLACE PARTS)
B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

C

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

D

REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

E

REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH