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Last Modified: 11-27-2007 1.6 J
Service Category: Vehicle Exterior Section: Window/Glass
Model Year: 2008 Model: LX570 Doc ID: RM000000Y4800IX
Title: WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: DESCRIPTION (2008 LX570)

Rear Power Window LH Auto Up / Down Function does not Operate with Rear Power Window Switch LH

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 rear power window regulator switch and the rear 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 (REAR POWER WINDOW REGULATOR SWITCH LH)

(a) Check that the rear door power window LH 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:

Rear door power window LH moves.

OK

3.

READ VALUE USING TECHSTREAM (REAR POWER WINDOW REGULATOR MOTOR LH)

(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) .

RL-Door Motor

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

RL Door P/W Auto SW

Rear power window LH auto up/down signal / ON or OFF

ON: Rear power window LH auto up/down switch operated

OFF: Rear power window LH switch not operated

-

OK:

Techstream display changes according to operation of rear power window switch LH.

OK

4.

CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH LH - REAR POWER WINDOW REGULATOR MOTOR LH)

(a) Disconnect the J10 switch connector.

(b) Disconnect the J11 motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J10-4 (AUTO) - J11-4 (AUTO)

Always

Below 1 Ω

J10-4 (AUTO) or J11-4 (AUTO) - Body ground

Always

10 kΩ or higher
OK

5.

INSPECT REAR POWER WINDOW REGULATOR SWITCH LH


(a) Remove the rear power window regulator switch WINDOW / GLASS: REAR 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

J10-4 (AUTO) - J10-5 (GND)

Auto up/down operation

Below 1 Ω
OK