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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: RM000000Y4900IX
Title: WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: DESCRIPTION (2008 LX570)

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

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 MOTOR RH)

(a) Check that the rear door power window RH 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 RH moves.

OK

3.

READ VALUE USING TECHSTREAM (REAR 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) .

RR-Door Motor

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

RR Door P/W Auto SW

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

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

OFF: Rear power window RH switch not operated

-

OK:

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

OK

4.

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

(a) Disconnect the J3 switch connector.

(b) Disconnect the J4 motor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J3-4 (AUTO) - J4-4 (AUTO)

Always

Below 1 Ω

J3-4 (AUTO) or J4-4 (AUTO) - Body ground

Always

10 kΩ or higher
OK

5.

INSPECT REAR POWER WINDOW REGULATOR SWITCH RH


(a) Remove the rear power window regulator switch RH 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

J3-4 (AUTO) - J3-5 (GND)

Auto up/down operation

Below 1 Ω
OK