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Home › Lexus › 2002 › SC 430 › Repair and Diagnosis › External Pages › Different car › Section 238 (Power Window Control System - Diagnosis) › Power Window Motor Circuit (Driver Side) › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTCS 
    1. Operate the driver door power window. Check if any DTC is output.

    Result: 

    Fig 1: Result Chart
    G01443007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    B: PROCEED TO DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART  ) 

    A: Go to next step. 

  2. PERFORM ACTIVE TEST USING HAND-HELD TESTER 
    1. Connect the hand-held tester (with CAN VIM) to the DLC3.
    2. Turn the ignition switch ON and press the hand-held tester main switch ON.
    3. Select the item below in the ACTIVE TEST and then check that the power window operates.

    Driver door ECU: 

    Fig 2: Driver Door ECU - Active Test Chart
    G01443008Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: "ON"(power window is operating) appears on the screen. 

    NOTE: This test causes vehicle parts to move. Please watch your hands.

    NG: Go to step 3 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 

  3. CHECK WIRE HARNESS (POWER WINDOW REGULATOR MOTOR ASSY FRONT LH - DRIVER DOOR ECU) 
    1. Disconnect the P14 motor connector.
    2. Disconnect the D25 ECU connector.
    3. Measure the resistance of the wire harness side connectors.

    Standard: 

    Fig 3: Terminals Resistance Reference Chart
    G01443009Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Checking Wire Harness (Power Window Regulator Motor Assy Front LH - Driver Door ECU)
    G01443010Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

  4. INSPECT POWER WINDOW REGULATOR MOTOR ASSY 
    1. Remove the motor (see OVERHAUL ).
    2. Apply battery voltage to the motor connector according the figure Fig 5 below.
    3. Check that the motor rotates smoothly.
    NOTE: Do not apply battery voltage to any terminals except terminals 4 and 5.

    OK: Go to next step. 

    Fig 5: Measurement Condition Chart
    G01443011Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 6: Inspecting Power Window Regulator Motor Assy
    G01443012Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE POWER WINDOW REGULATOR MOTOR ASSY 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 

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