Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Rear Power Window RH Auto Up / Down Function does not Operate with Rear Power Window Switch RH

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Vehicle Exterior / Window / Glass / Power Window Control System / Rear Power Window RH Auto Up / Down Function does not Operate with Rear Power Window Switch RH

DESCRIPTION

If the manual up and down functions operate normally but the auto up and down functions do not, the power window control system may be in fail-safe mode.

If power window initialization has not been performed, the auto up and down functions will not operate.

Click here

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the power window regulator motor assembly (for rear RH door) has been replaced with a new one, initialize the power window control system.

    Click here

  • Check that power window system customize settings "RR Window Auto Up" and "RR Window Auto Down" are set to "ON" before performing the following procedure.

    Click here

  • After the catch protection function has operated, the auto up function will not operate the first time the power window auto up switch is operated. The auto up function will operate normally after the first power window switch operation.

HINT:

If the pulse sensor built into the power window regulator motor assembly (for rear RH door) is malfunctioning, the power window control system will enter fail-safe mode. The remote up and down and auto up and down functions cannot be operated during fail-safe mode. However, the power window can be closed by holding the rear power window regulator switch assembly (for RH door) at the auto up position, and opened manually by pushing down the rear power window regulator switch assembly (for RH door).

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PROCEDURE

1.

READ VALUE USING TECHSTREAM (RR-DOOR MOTOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / RR-Door Motor / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > RR-Door Motor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RR Door P/W Auto SW

Rear RH door power window auto switch signal

OFF or ON

OFF: Rear RH door power window auto up or auto down switch not being operated

ON: Rear RH door power window auto up or auto down switch being operated

-
Body Electrical > RR-Door Motor > Data List

Tester Display

RR Door P/W Auto SW

OK:

On the Techstream screen, ON or OFF is displayed accordingly.

NG

GO TO STEP 4

OK

2.

PERFORM INITIALIZATION (FOR REAR RH DOOR)

(a) Initialize the power window regulator motor assembly (for rear RH door).

Click here

NEXT

3.

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

(a) Check that the rear RH door power window moves when the auto up and down functions of the rear power window regulator switch assembly (for RH door) are operated.

Click here

OK:

Rear RH door auto up and down functions are normal.

OK

END (PROBLEM DUE TO INITIALIZATION FAILURE)
NG

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH DOOR)

4.

INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR RH DOOR)

(a) Remove the rear power window regulator switch assembly (for RH door).

Click here

(b) Inspect the rear power window regulator switch assembly (for RH door).

Click here

NG

REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR RH DOOR)

OK

5.

CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (FOR RH DOOR) - POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH DOOR))

(a) Disconnect the O1 power window regulator motor assembly (for rear RH door) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection

Condition

Specified Condition

Q1-4 (AUTO) - O1-4 (AUTO)

Always

Below 1 Ω

Q1-4 (AUTO) or O1-4 (AUTO) - Body ground

Always

10 kΩ or higher
OK

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR REAR RH DOOR)

NG

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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