Home › Vehicle Exterior › Window/Glass › POWER WINDOW CONTROL SYSTEM
Last Modified: 11-27-2007 1.6 J
Service Category: Vehicle Exterior Section: Window/Glass
Model Year: 2008 Model: LX570 Doc ID: RM000000Y4700IX
Title: WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: DESCRIPTION (2008 LX570)

Front Passenger Side Power Window Auto Up / Down Function does not Operate with Front Passenger Side Power Window Switch

DESCRIPTION

If the auto up/down function does not operate, the cause may be one or more of the following:

  • The ECU in the power window regulator motor determines that the power window regulator motor has not been initialized.
  • The power window regulator switch has a malfunction.
  • The Hall-IC in the power window regulator motor has a malfunction.
  • There is an open or short in the wiring between the power window regulator switch and the front power window regulator motor.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: DTC CHECK / CLEAR (2008 LX570) .

Result

Result

Proceed to

DTC is not output

A

B2311 is output

B

B2312 is output

C

B2313 is output

D

LIN communication system DTCs are output

E
A

2.

CHECK MANUAL UP/DOWN FUNCTION (POWER WINDOW REGULATOR SWITCH)

(a) Check that the front passenger side door power window moves when the manual up/down function of the power window regulator switch is operated WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: OPERATION CHECK (2008 LX570) .

OK:

Front passenger side door power window moves.

OK

3.

READ VALUE USING TECHSTREAM (FRONT POWER WINDOW REGULATOR MOTOR RH)

(a) Use the Data List to check if the power window regulator motor is functioning properly WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: DATA LIST / ACTIVE TEST (2008 LX570) .

P-Door Motor

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

P Door P/W Auto SW

Front passenger side power window auto up/down signal / ON or OFF

ON: Front passenger side power window auto up/down switch operated

OFF: Power window regulator switch not operated

-

OK:

Techstream display changes according to operation of power window regulator switch.

OK

4.

CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH - FRONT POWER WINDOW REGULATOR MOTOR RH)

(a) Disconnect the I3 switch connector.

(b) Disconnect the I4 motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I3-4 (AUTO) - I4-4 (AUTO)

Always

Below 1 Ω

I3-4 (AUTO) or I4-4 (AUTO) - Body ground

Always

10 kΩ or higher
OK

5.

INSPECT POWER WINDOW REGULATOR SWITCH


(a) Remove the power window regulator switch WINDOW / GLASS: FRONT PASSENGER SIDE POWER WINDOW SWITCH: REMOVAL (2008 LX570) .

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

I3-4 (AUTO) - I3-5 (GND)

Auto up/down operation

Below 1 Ω
OK