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

Lexus NX Service Manual / Vehicle Exterior / Window / Glass / Power Window Control System / 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.
  • 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.

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).

Click here

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 or rear power window regulator switch assembly (for rear LH or RH door) is operated.

Click here

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 door window regulator.

  • for Front Door:

    Click here

  • for Rear Door:

    Click here

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

  • for Front Door:

    Click here

  • for Rear Door:

    Click here

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

(d) Check that the window glass slides smoothly when sliding it up 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

Proceed to

OK (Driver door power window)

A

OK (Front passenger door power window)

B

OK (Rear LH door power window)

C

OK (Rear RH door power window)

D

NG

E

A

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

C

REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

D

REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

E

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

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