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 motor is driven by operating the power window switch.

This DTC is stored when the ECU built into the door window 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
Front Door Window Regulator (for Driver Side)
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.

  • Front door window regulator

  • Harness or connector
Front Door Window Regulator (for Front Passenger Side)
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

  • 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 LH is stuck.

  • The rear power window regulator switch LH 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 RH is stuck.

  • The rear power window regulator switch RH 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

A01IPLJE03
A01IPK1E23
A01IPK1E21
A01IPK1E22

INSPECTION PROCEDURE

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
      DTC B2312 is output. C

    B

    GO TO LIN COMMUNICATION SYSTEM Click here

    C

    CHECK MALFUNCTION LOCATION Click here

    A

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

  3. CHECK MALFUNCTION LOCATION


    1. Check where DTC B2312 is output from Click here.

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

      • *: w/ Rear Door Power Window


    B

    READ VALUE USING INTELLIGENT TESTER (DRIVER SIDE DOOR WINDOW REGULATOR 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

    A

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

  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 LH Click here

    C

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY RH Click here

    A

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


    • *1: for LHD

    • *2: for RHD


    1. A01IRX3E03
      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)

      Disconnect the K5*1 or J5*2 switch connector.

    2. Disconnect the K8*1 or J6*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
      K5-20 (UP) - K8-10 (UP) Always Below 1 Ω
      K5-15 (DOWN) - K8-7 (DOWN) Always Below 1 Ω
      K5-20 (UP) or K8-10 (UP) - Body ground Always 10 kΩ or higher
      K5-15 (DOWN) or K8-7 (DOWN) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      J5-20 (UP) - J6-10 (UP) Always Below 1 Ω
      J5-15 (DOWN) - J6-7 (DOWN) Always Below 1 Ω
      J5-20 (UP) or J6-10 (UP) - Body ground Always 10 kΩ or higher
      J5-15 (DOWN) or J6-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY RH Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY LH Click here

  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. A01INPWE01

      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

    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)


    • *1: for LHD

    • *2: for RHD


    1. A01IT9TE04
      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)

      Disconnect the J4*1 or K4*2 switch connector.

    2. Disconnect the J8*1 or K10*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
      J4-6 (UP) - J8-10 (UP) Always Below 1 Ω
      J4-7 (DOWN) - J8-7 (DOWN) Always Below 1 Ω
      J4-8 (AUTO) - J8-4 (AUTO) Always Below 1 Ω
      J4-6 (UP) or J8-10 (UP) - Body ground Always 10 kΩ or higher
      J4-7 (DOWN) or J8-7 (DOWN) - Body ground Always 10 kΩ or higher
      J4-8 (AUTO) or J8-4 (AUTO) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      K4-6 (UP) - K10-10 (UP) Always Below 1 Ω
      K4-7 (DOWN) - K10-7 (DOWN) Always Below 1 Ω
      K4-8 (AUTO) - K10-4 (AUTO) Always Below 1 Ω
      K4-6 (UP) or K10-10 (UP) - Body ground Always 10 kΩ or higher
      K4-7 (DOWN) or K10-7 (DOWN) - Body ground Always 10 kΩ or higher
      K4-8 (AUTO) or K10-4 (AUTO) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY LH Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE FRONT DOOR WINDOW REGULATOR ASSEMBLY RH Click here

  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.

    NG

    INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY LH Click here

    OK

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY LH Click here

  10. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY LH


    1. A01INPWE01

      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

    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. A01IOFSE07
      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 M1 switch connector.

    2. Disconnect the M3 regulator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M1-6 (UP) - M3-10 (UP) Always Below 1 Ω
      M1-7 (DOWN) - M3-7 (DOWN) Always Below 1 Ω
      M1-8 (AUTO) - M3-4 (AUTO) Always Below 1 Ω
      M1-6 (UP) or M3-10 (UP) - Body ground Always 10 kΩ or higher
      M1-7 (DOWN) or M3-7 (DOWN) - Body ground Always 10 kΩ or higher
      M1-8 (AUTO) or M3-4 (AUTO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY LH Click here

  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.

    NG

    INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY RH Click here

    OK

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY RH Click here

  13. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY RH


    1. A01INPWE01

      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

    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)


    1. A01IOFSE08
      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)

      Disconnect the L1 switch connector.

    2. Disconnect the L3 regulator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L1-6 (UP) - L3-10 (UP) Always Below 1 Ω
      L1-7 (DOWN) - L3-7 (DOWN) Always Below 1 Ω
      L1-8 (AUTO) - L3-4 (AUTO) Always Below 1 Ω
      L1-6 (UP) or L3-10 (UP) - Body ground Always 10 kΩ or higher
      L1-7 (DOWN) or L3-7 (DOWN) - Body ground Always 10 kΩ or higher
      L1-8 (AUTO) or L3-4 (AUTO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE REAR DOOR WINDOW REGULATOR ASSEMBLY RH Click here