POWER WINDOW CONTROL SYSTEM, Diagnostic DTC:B2312

DTC Code DTC Name
B2312 Driver Side Door Master Switch Malfunction

DESCRIPTION

The power window regulator motor consists of the motor, regulator and ECU. The power window regulator motor is driven by operating the power window switch. This DTC is output when the ECU built into the regulator motor determines that the power window switch is stuck.

Note


  • When the power window regulator motor is reinstalled or replaced, the power window control system must be initialized.

  • After a door glass or a door glass run has been replaced, the jam protection function may operate unexpectedly when the auto up function is used. In such cases, the auto up function can be resumed by repeating the following operation at least 5 times:

    (a) Close the power window by fully pulling up the power window master switch and holding it in the auto up position.

    (b) Open the power window by fully pushing down the power window master switch.

DTC No. DTC Detection Condition Trouble Area
B2312

  • The power window regulator master switch is stuck

  • The power window regulator master switch is held in the same position for more than 20 seconds

  • Power window regulator master switch assembly

  • Front power window regulator motor assembly assembly (Driver side)

  • Harness or connector

WIRING DIAGRAM

A005J01E01
A005J01E02

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (D-DOOR MOTOR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / D-Door Motor / Data List.

    5. According to the display on the tester, read the Data List.

      D-Door Motor
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door P/W Auto SW Driver door power window auto switch signal / ON or OFF

      ON: Driver door power window auto switch operates

      OFF: Driver door power window auto switch does not operate

      		 -
      D Door P/W Up SW Driver door power window manual up switch signal / ON or OFF

      ON: Driver door power window manual up switch operates

      OFF: Driver door power window manual up switch does not operate

      		 -
      D Door P/W Down SW Driver door power window manual down switch signal / ON or OFF

      ON: Driver door power window manual down switch operates

      OFF: Driver door power window manual down switch does not operate

      		 -
      OK
      The tester display changes normally when master switch is operated.

    OK

    END (DUE TO KEEPING SWITCH OPERATED FOR 20 SECONDS OR MORE)

    NG

  2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


    1. Remove the power window regulator master switch assembly Click here.

    2. Inspect the power window regulator master switch assembly Click here.


    NG

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER WINDOW MASTER SWITCH - POWER WINDOW MOTOR)


    1. for LHD:


      1. Disconnect the H1 power window regulator master switch assembly connector.

      2. Disconnect the H3 front power window regulator motor assembly connector.

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

        Standard Resistance (Check for Open)
        w/ Rear Power Window
        Tester Connection Condition Specified Condition
        H1-8 (UP) - H3-10 (UP) Always Below 1 Ω
        H1-5 (DOWN) - H3-7 (DOWN) Always Below 1 Ω
        H1-4 (AUTO) - H3-4 (AUTO) Always Below 1 Ω
        H1-1 (GND) - Body ground Always Below 1 Ω
        w/o Rear Power Window
        Tester Connection Condition Specified Condition
        H1-18 (UP) - H3-10 (UP) Always Below 1 Ω
        H1-10 (DOWN) - H3-7 (DOWN) Always Below 1 Ω
        H1-1 (AUTO) - H3-4 (AUTO) Always Below 1 Ω
        H1-7 (GND) - Body ground Always Below 1 Ω
        Standard Resistance (Check for Short)
        w/ Rear Power Window
        Tester Connection Condition Specified Condition
        H1-8 (UP) - Body ground Always 10 kΩ or higher
        H1-5 (DOWN) - Body ground Always 10 kΩ or higher
        H1-4 (AUTO) - Body ground Always 10 kΩ or higher
        w/o Rear Power Window
        Tester Connection Condition Specified Condition
        H1-18 (UP) - Body ground Always 10 kΩ or higher
        H1-10 (DOWN) - Body ground Always 10 kΩ or higher
        H1-1 (AUTO) - Body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the G1 power window regulator master switch assembly connector.

      2. Disconnect the G3 front power window regulator motor assembly connector.

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

        Standard Resistance (Check for Open)
        w/ Rear Power Window
        Tester Connection Condition Specified Condition
        G1-1 (UP) - G3-10 (UP) Always Below 1 Ω
        G1-5 (DOWN) - G3-7 (DOWN) Always Below 1 Ω
        G1-4 (AUTO) - G3-4 (AUTO) Always Below 1 Ω
        G1-9 (GND) - Body ground Always Below 1 Ω
        w/o Rear Power Window
        Tester Connection Condition Specified Condition
        G1-9 (UP) - G3-10 (UP) Always Below 1 Ω
        G1-6 (DOWN) - G3-7 (DOWN) Always Below 1 Ω
        G1-18 (AUTO) - G3-4 (AUTO) Always Below 1 Ω
        G1-7 (GND) - Body ground Always Below 1 Ω
        Standard Resistance (Check for Short)
        w/ Rear Power Window
        Tester Connection Condition Specified Condition
        G1-1 (UP) - Body ground Always 10 kΩ or higher
        G1-5 (DOWN) - Body ground Always 10 kΩ or higher
        G1-4 (AUTO) - Body ground Always 10 kΩ or higher
        w/o Rear Power Window
        Tester Connection Condition Specified Condition
        G1-9 (UP) - Body ground Always 10 kΩ or higher
        G1-6 (DOWN) - Body ground Always 10 kΩ or higher
        G1-18 (AUTO) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR