POWER WINDOW CONTROL SYSTEM, Diagnostic DTC:B2312

DTC Code DTC Name
B2312 Power Window Switch Malfunction

DESCRIPTION

The door window regulator consists of the motor, regulator and ECU. The door window regulator is driven by operating the power window switch.

This DTC is stored when the ECU built into the regulator determines that the power window switch is stuck.

Tech Tips

This DTC may be stored for all the windows.

Note


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

  • After any 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:


    1. Close the power window by fully pulling up the power window switch and holding it in the auto up position.

    2. Open the power window by fully pushing down the power window switch.

Power Window Regulator Master Switch
DTC Code DTC Detection Condition Trouble Area
B2312

Either condition is met:


  • The power window regulator master switch is stuck.

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

  • Power window regulator master switch

  • Harness or connector
Front Door Window Regulator LH
DTC Code DTC Detection Condition Trouble Area
B2312

Either condition is met:


  • The power window regulator master switch is stuck.

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

  • Power window regulator master switch

  • Front door window regulator LH

  • Harness or connector
Front Door Window Regulator RH
DTC Code DTC Detection Condition Trouble Area
B2312

Either condition is met:


  • The power window regulator switch is stuck.

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

  • Power window regulator switch

  • Front door window regulator RH

  • Harness or connector
Rear Door Window Regulator LH (w/ Rear Door Power Window)
DTC Code DTC Detection Condition Trouble Area
B2312

Either condition is met:


  • The rear power window regulator switch is stuck.

  • The rear power window regulator switch is held in the same position for more than 20 sec.

  • Rear power window regulator switch LH

  • Rear door window regulator LH

  • Harness or connector
Rear Door Window Regulator RH (w/ Rear Door Power Window)
DTC Code DTC Detection Condition Trouble Area
B2312

Either condition is met:


  • The rear power window regulator switch is stuck.

  • The rear power window regulator switch is held in the same position for more than 20 sec.

  • Rear power window regulator switch RH

  • Rear door window regulator RH

  • Harness or connector

WIRING DIAGRAM

A004OB6E06
A004RH9E01
A004OJ5E40
A004OJ5E41

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      No DTCs output. A
      LIN communication DTCs are output. B
      B2312 is output. C

    A

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

    B

    GO TO LIN COMMUNICATION SYSTEM Click here

    C

  3. CHECK MALFUNCTION LOCATION


    1. Check where DTC B2312 is output from.

      Result
      Result Proceed to
      B2312 output from power window regulator master switch. A
      B2312 output from driver side door window regulator. B
      B2312 output from passenger side door window regulator. C
      B2312 output from rear door window regulator LH*. D
      B2312 output from rear door window regulator RH*. E

      *: w/ Rear Door Power Window


    A

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    C

    READ VALUE USING INTELLIGENT TESTER (FRONT PASSENGER SIDE DOOR WINDOW REGULATOR ASSEMBLY) Click here

    D

    READ VALUE USING INTELLIGENT TESTER (REAR DOOR WINDOW REGULATOR ASSEMBLY LH) Click here

    E

    READ VALUE USING INTELLIGENT TESTER (REAR DOOR WINDOW REGULATOR ASSEMBLY RH) Click here

    B

  4. READ VALUE USING INTELLIGENT TESTER (DRIVER SIDE DOOR WINDOW REGULATOR ASSEMBLY)


    1. Use the Data List to check if the door window regulator is functioning properly Click here.

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

      ON: Driver side power window auto up/down switch operated

      OFF: Driver side power window switch not operated

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

      ON: Driver side power window manual up switch operated

      OFF: Driver side power window switch not operated

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

      ON: Driver side power window manual down switch operated

      OFF: Driver side power window switch not operated

      		 -
      Result
      Result Proceed to
      Display does not change according to operation of power window regulator master switch. A
      Display changes according to operation of power window regulator master switch (for LHD). B
      Display changes according to operation of power window regulator master switch (for RHD). C

    B

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY RH Click here

    C

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY LH Click here

    A

  5. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - FRONT DOOR WINDOW REGULATOR ASSEMBLY)

    A004PWGE10
    Text in Illustration
    *1 for LHD
    *2 for RHD
    *3

    Front view of wire harness connector

    (to Power Window Regulator Master Switch)
    *4

    Front view of wire harness connector

    (to Front Door Window Regulator)

    *1: for LHD

    *2: for RHD


    1. Disconnect the E14*1 or E8*2 switch connector.

    2. Disconnect the E15*1 or E6*2 regulator connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      E14-20 (UP) - E15-10 (UP) Always Below 1 Ω
      E14-15 (DOWN) - E15-7 (DOWN) Always Below 1 Ω
      E14-20 (UP) or E15-10 (UP) - Body ground Always 10 kΩ or higher
      E14-15 (DOWN) or E15-7 (DOWN) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      E8-20 (UP) - E6-10 (UP) Always Below 1 Ω
      E8-15 (DOWN) - E6-7 (DOWN) Always Below 1 Ω
      E8-20 (UP) or E6-10 (UP) - Body ground Always 10 kΩ or higher
      E8-15 (DOWN) or E6-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY RH Click here

    B

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY LH Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. READ VALUE USING INTELLIGENT TESTER (FRONT PASSENGER SIDE DOOR WINDOW REGULATOR ASSEMBLY)


    1. Use the Data List to check if the front door window regulator is functioning properly Click here.

      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: Front passenger side power window regulator switch not operated

      		 -
      P Door P/W Up SW Front passenger side power window manual up signal / ON or OFF

      ON: Front passenger side power window manual up switch operated

      OFF: Front passenger side power window regulator switch not operated

      		 -
      P Door P/W Down SW Front passenger side power window manual down signal / ON or OFF

      ON: Front passenger side power window manual down switch operated

      OFF: Front passenger side power window regulator switch not operated

      		 -
      Result
      Result Proceed to
      Display does not change according to operation of power window regulator switch. A
      Display changes according to operation of power window regulator switch (for LHD). B
      Display changes according to operation of power window regulator switch (for RHD). C

    B

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY LH Click here

    C

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY RH Click here

    A

  7. INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY


    1. A004U0NE24
      *1 DOWN
      *2 UP

      Remove the power window regulator switch Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      6 (UP) - 1 (GND) Manual up operation Below 1 Ω
      7 (DOWN) - 1 (GND) Manual down operation Below 1 Ω
      8 (AUTO) - 1 (GND) Auto up/down operation Below 1 Ω
      6 (UP) - 1 (GND) Not operated 10 kΩ or higher
      7 (DOWN) - 1 (GND) Not operated 10 kΩ or higher
      8 (AUTO) - 1 (GND) Not operated 10 kΩ or higher
      Text in Illustration
      *1

      Component without harness connected

      (Power Window Regulator Switch)

    NG

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - FRONT DOOR WINDOW REGULATOR ASSEMBLY)

    A004N1UE14
    Text in Illustration
    *1 for LHD
    *2 for RHD
    *3

    Front view of wire harness connector

    (to Power Window Regulator Switch)
    *4

    Front view of wire harness connector

    (to Front Door Window Regulator)

    *1: for LHD

    *2: for RHD


    1. Disconnect the E4*1 or E19*2 switch connector.

    2. Disconnect the E6*1 or E20*2 regulator connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      E4-6 (UP) - E6-10 (UP) Always Below 1 Ω
      E4-7 (DOWN) - E6-7 (DOWN) Always Below 1 Ω
      E4-8 (AUTO) - E6-4 (AUTO) Always Below 1 Ω
      E4-6 (UP) or E6-10 (UP) - Body ground Always 10 kΩ or higher
      E4-7 (DOWN) or E6-7 (DOWN) - Body ground Always 10 kΩ or higher
      E4-8 (AUTO) or E6-4 (AUTO) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      E19-6 (UP) - E20-10 (UP) Always Below 1 Ω
      E19-7 (DOWN) - E20-7 (DOWN) Always Below 1 Ω
      E19-8 (AUTO) - E20-4 (AUTO) Always Below 1 Ω
      E19-6 (UP) or E20-10 (UP) - Body ground Always 10 kΩ or higher
      E19-7 (DOWN) or E20-7 (DOWN) - Body ground Always 10 kΩ or higher
      E19-8 (AUTO) or E20-4 (AUTO) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY RH Click here

    B

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY LH Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. READ VALUE USING INTELLIGENT TESTER (REAR DOOR WINDOW REGULATOR ASSEMBLY LH)


    1. Use the Data List to check if the rear door window regulator is functioning properly Click here.

      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

      		 -
      RL Door P/W Up SW Rear power window LH manual up signal / ON or OFF

      ON: Rear power window LH manual up switch operated

      OFF: Rear power window LH switch not operated

      		 -
      RL Door P/W Down SW Rear power window LH manual down signal / ON or OFF

      ON: Rear power window LH manual down switch operated

      OFF: Rear power window LH switch not operated

      		 -
      OK
      Display changes according to operation of rear power window regulator switch LH.

    OK

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY LH Click here

    NG

  10. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY LH

    A004U0NE24
    *1 DOWN
    *2 UP

    1. Remove the rear power window regulator switch LH Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      6 (UP) - 1 (GND) Manual up operation Below 1 Ω
      7 (DOWN) - 1 (GND) Manual down operation Below 1 Ω
      8 (AUTO) - 1 (GND) Auto up/down operation Below 1 Ω
      6 (UP) - 1 (GND) Not operated 10 kΩ or higher
      7 (DOWN) - 1 (GND) Not operated 10 kΩ or higher
      8 (AUTO) - 1 (GND) Not operated 10 kΩ or higher
      Text in Illustration
      *1

      Component without harness connected

      (Rear Power Window Regulator Switch LH)

    NG

    REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY LH Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY LH - REAR DOOR WINDOW REGULATOR ASSEMBLY LH)


    1. A004Q3DE23
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Rear Power Window Regulator Switch LH)
      *2

      Front view of wire harness connector

      (to Rear Door Window Regulator LH)

      Disconnect the F6 switch connector.

    2. Disconnect the F9 regulator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F6-6 (UP) - F9-10 (UP) Always Below 1 Ω
      F6-7(DOWN) - F9-7 (DOWN) Always Below 1 Ω
      F6-8 (AUTO) - F9-4 (AUTO) Always Below 1 Ω
      F6-6 (UP) or F9-10 (UP) - Body ground Always 10 kΩ or higher
      F6-7 (DOWN) or F9-7 (DOWN) - Body ground Always 10 kΩ or higher
      F6-8 (AUTO) or F9-4 (AUTO) - Body ground Always 10 kΩ or higher

    OK

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. READ VALUE USING INTELLIGENT TESTER (REAR DOOR WINDOW REGULATOR ASSEMBLY RH)


    1. Use the Data List to check if the rear door window regulator is functioning properly Click here.

      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

      		 -
      RR Door P/W Up SW Rear power window RH manual up signal / ON or OFF

      ON: Rear power window RH manual up switch operated

      OFF: Rear power window RH switch not operated

      		 -
      RR Door P/W Down SW Rear power window RH manual down signal / ON or OFF

      ON: Rear power window RH manual down switch operated

      OFF: Rear power window RH switch not operated

      		 -
      OK
      Display changes according to operation of rear power window regulator switch RH.

    OK

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY RH Click here

    NG

  13. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY RH

    A004U0NE24
    *1 DOWN
    *2 UP

    1. Remove the rear power window regulator switch RH Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      6 (UP) - 1 (GND) Manual up operation Below 1 Ω
      7 (DOWN) - 1 (GND) Manual down operation Below 1 Ω
      8 (AUTO) - 1 (GND) Auto up/down operation Below 1 Ω
      6 (UP) - 1 (GND) Not operated 10 kΩ or higher
      7 (DOWN) - 1 (GND) Not operated 10 kΩ or higher
      8 (AUTO) - 1 (GND) Not operated 10 kΩ or higher
      Text in Illustration
      *1

      Component without harness connected

      (Rear Power Window Regulator Switch RH)

    NG

    REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY RH Click here

    OK

  14. CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY RH - REAR DOOR WINDOW REGULATOR ASSEMBLY RH)

    A004Q3DE24
    Text in Illustration
    *1

    Front view of wire harness connector

    (to Rear Power Window Regulator Switch RH)
    *2

    Front view of wire harness connector

    (to Rear Door Window Regulator RH)

    1. Disconnect the F1 switch connector.

    2. Disconnect the F4 regulator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F1-6 (UP) - F4-10 (UP) Always Below 1 Ω
      F1-7 (DOWN) - F4-7 (DOWN) Always Below 1 Ω
      F1-8 (AUTO) - F4-4 (AUTO) Always Below 1 Ω
      F1-6 (UP) or F4-10 (UP) - Body ground Always 10 kΩ or higher
      F1-7 (DOWN) or F4-7 (DOWN) - Body ground Always 10 kΩ or higher
      F1-8 (AUTO) or F4-4 (AUTO) - Body ground Always 10 kΩ or higher

    OK

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR