POWER WINDOW CONTROL SYSTEM, Diagnostic DTC:B2312

DTC Code DTC Name
B2312 Power Window Switch Malfunction

DESCRIPTION

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

Tech Tips

This DTC may occur for all the windows.

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:


    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 switch.

Master switch:
DTC Code DTC Detection Condition Trouble Area
B2312 Master switch stuck
  • Master switch

  • Master switch held in same position for more than 20 seconds

Power window regulator motor (for Driver side):
DTC Code DTC Detection Condition Trouble Area
B2312 Master switch stuck
  • Master switch

  • Power window regulator motor

  • Wire harness

  • Master switch held in same position for more than 20 seconds

Power window regulator motor (for Front passenger side):
DTC Code DTC Detection Condition Trouble Area
B2312 Power window regulator switch stuck
  • Power window regulator switch

  • Power window regulator motor

  • Wire harness

  • Power window regulator switch held in same position for more than 20 seconds

Power window regulator motor (for Rear LH):
DTC Code DTC Detection Condition Trouble Area
B2312 Power window regulator switch stuck
  • Power window regulator switch

  • Power window regulator motor

  • Wire harness

  • Power window regulator switch held in same position for more than 20 seconds

Power window regulator motor (for Rear RH):
DTC Code DTC Detection Condition Trouble Area
B2312 Power window regulator switch stuck
  • Power window regulator switch

  • Power window regulator motor

  • Wire harness

  • Power window regulator switch held in same position for more than 20 seconds

WIRING DIAGRAM

A01GMR1E02
A01GMR1E03
A01GN0UE05
A01GN0UE06
A01GN0UE02
A01GN0UE07

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK LIN COMMUNICATION SYSTEM


    1. Check for LIN communication system DTCs related to the power window control system.

      Result:
      Result Proceed to
      DTC is output A
      DTC is not output B

    A
    B
  2. CHECK CAN COMMUNICATION SYSTEM


    1. Check for CAN communication system DTCs related to the power window control system.

      Result:
      Result Proceed to
      DTC is output (for LHD) A
      DTC is output (for RHD) B
      DTC is not output C

    A
    B
    C
  3. CHECK FOR DTC


    1. Check where DTC B2312 is output from.

      Result:
      Result Proceed to
      B2312 output from Master switch A
      B2312 output from driver side motor B
      B2312 output from front passenger side motor C
      B2312 output from rear motor LH D
      B2312 output from rear motor RH E

    B
    C
    D
    E
    A
  4. READ VALUE USING INTELLIGENT TESTER (MASTER SWITCH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn ON the intelligent tester.

    4. Enter the following menus.


      1. Select: Body / Master Switch / Data List /

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

      Master switch:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door P/W Auto SW Driver side power window auto UP/DOWN switch signal / ON or OFF

      ON: Driver side power window auto UP/DOWN switch on master switch operated

      OFF: Driver side power window switch on master switch not operated

      -
      P Door P/W Auto SW Front passenger side power window remote auto UP/DOWN switch signal / ON or OFF

      ON: Front passenger side power window remote auto UP/DOWN switch on master switch operated

      OFF: Front passenger side power window switch on master switch not operated

      -
      RR Door P/W Auto SW Rear power window RH remote auto UP/DOWN switch signal / ON or OFF

      ON: Rear power window RH remote auto UP/DOWN switch on master switch operated

      OFF: Rear power window RH switch on master switch not operated

      -
      RL Door P/W Auto SW Rear power window LH remote auto UP/DOWN switch signal / ON or OFF

      ON: Rear power window LH remote auto UP/DOWN switch on master switch operated

      OFF: Rear power window LH switch on master switch not operated

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

      ON: Front passenger side power window remote manual UP switch on master switch operated

      OFF: Front passenger side power window switch on master switch not operated

      -
      RR Door P/W Up Switch Rear power window RH remote manual UP switch signal / ON or OFF

      ON: Rear power window RH remote manual UP switch on master switch operated

      OFF: Rear power window RH switch on master switch not operated

      -
      RL Door P/W Up Switch Rear power window LH remote manual UP switch signal / ON or OFF

      ON: Rear power window LH remote manual UP switch on master switch operated

      OFF: Rear power window LH switch on master switch not operated

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

      ON: Front passenger side power window remote manual DOWN switch on master switch operated

      OFF: Front passenger side power window switch on master switch not operated

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

      ON: Rear power window RH remote manual DOWN switch on master switch operated

      OFF: Rear power window RH switch on master switch not operated

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

      ON: Rear power window LH remote manual DOWN switch on master switch operated

      OFF: Rear power window LH switch on master switch not operated

      -
      Window Lock Switch Status Power window LOCK switch / ON or OFF

      ON: Power window lock switch LOCK position

      OFF: Power window lock switch UNLOCK position

      -
      OK
      Tester display changes normally when master switch is operated.

    NG
    OK
  5. READ VALUE USING INTELLIGENT TESTER (DRIVER SIDE MOTOR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn ON the intelligent tester.

    4. Enter the following menus.


      1. Select: Body / D-Door Motor / Data List /

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

      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 switch signal / ON or OFF

      ON: Driver side power window auto UP/DOWN switch on master switch operated

      OFF: Driver side power window switch on master switch not operated

      -
      D Door P/W Up SW Driver side power window MANUAL UP switch signal / ON or OFF

      ON: Driver side power window manual UP switch on master switch operated

      OFF: Driver side power window switch on master switch not operated

      -
      D Door P/W Down SW Driver side power window MANUAL DOWN switch signal / ON or OFF

      ON: Driver side power window manual DOWN switch on master switch operated

      OFF: Driver side power window switch on master switch not operated

      -
      OK
      Tester display changes normally when master switch is operated.

    NG
    OK
  6. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - DRIVER SIDE DOOR ECU)


    1. A01GMA1E02

      Disconnect the N13 switch connector.

    2. Disconnect the P10*1 or P4*2 ECU connector.

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

      Standard resistance
      for LHD:
      Tester Connection Condition Specified Condition
      P10-27 (SGND) - N13-12 (GND) Always Below 1 Ω
      P10-26 (CPBJ) - N13-11 (B) Always Below 1 Ω
      P10-27 (SGND) or N13-12 (GND) - Body ground Always 10 kΩ or higher
      P10-26 (CPBJ) or N13-11 (B) - Body ground Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      P4-27 (SGND) - N13-12 (GND) Always Below 1 Ω
      P4-26 (CPBJ) - N13-11 (B) Always Below 1 Ω
      P4-27 (SGND) or N13-12 (GND) - Body ground Always 10 kΩ or higher
      P4-26 (CPBJ) or N13-11 (B) - Body ground Always 10 kΩ or higher

    NG
    OK
  7. CHECK HARNESS AND CONNECTOR (DRIVER SIDE DOOR ECU - DRIVER SIDE MOTOR)


    1. A01GMXYE05

      Disconnect the N10*1 or N1*2 ECU connector.

    2. Disconnect the N11*1 or N3*2 motor connector.

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

      Standard resistance
      for LHD:
      Tester Connection Condition Specified Condition
      N10-5 (BDRJ) - N11-2 (B) Always Below 1 Ω
      N10-2 (PWE) - N11-1 (E) Always Below 1 Ω
      N10-5 (BDRJ) or N11-2 (B) - Body ground Always 10 kΩ or higher
      N10-2 (PWE) or N11-1 (E) - Body ground Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      N1-5 (BDRJ) - N3-2 (B) Always Below 1 Ω
      N1-2 (PWE) - N3-1 (E) Always Below 1 Ω
      N1-5 (BDRJ) or N3-2 (B) - Body ground Always 10 kΩ or higher
      N1-2 (PWE) or N3-1 (E) - Body ground Always 10 kΩ or higher

    NG
    OK
  8. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - DRIVER SIDE MOTOR)


    1. A01GK67E02

      Disconnect the N13 switch connector.

    2. Disconnect the N11*1 or N3*2 motor connector.

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

      Standard resistance
      for LHD:
      Tester Connection Condition Specified Condition
      N13-20 (UP) - N11-10 (UP1) Always Below 1 Ω
      N13-15 (DOWN) - N11-7 (DWN1) Always Below 1 Ω
      N13-20 (UP) or N11-10 (UP1) - Body ground Always 10 kΩ or higher
      N13-15 (DOWN) or N11-7 (DWN1) - Body ground Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      N13-20 (UP) - N3-10 (UP1) Always Below 1 Ω
      N13-15 (DOWN) - N3-7 (DWN1) Always Below 1 Ω
      N13-20 (UP) or N3-10 (UP1) - Body ground Always 10 kΩ or higher
      N13-15 (DOWN) or N3-7 (DWN1) - Body ground Always 10 kΩ or higher

    NG
    OK
  9. CHECK MASTER SWITCH ASSEMBLY (OPERATION)


    1. Temporarily replace the master switch with a new or normally functioning one Click here.

    2. Check that the power window function operates normally.

      OK
      Power window operates normally.
      Result:
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B
    C
    A
  10. READ VALUE USING INTELLIGENT TESTER (FRONT PASSENGER SIDE MOTOR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine on (IG).

    3. Turn ON the intelligent tester.

    4. Enter the following menus.


      1. Select: Body / P-Door Motor / Data List /

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

      P-Door Motor:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      P Door P/W Auto SW Front passenger side power window remote auto UP/DOWN switch signal / ON or OFF

      ON: Front passenger side power window remote auto UP/DOWN switch on master switch operated

      OFF: Front passenger side power window switch on master switch not operated

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

      ON: Front passenger side power window remote manual UP switch on master switch operated

      OFF: Front passenger side power window switch on master switch not operated

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

      ON: Front passenger side power window remote manual DOWN switch on master switch operated

      OFF: Front passenger side power window switch on master switch not operated

      -
      OK
      Tester display changes normally when front passenger side power window switch is operated.

    NG
    OK
  11. INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Front Passenger Side)


    1. A01GJPFE04

      Remove the switch.

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

      Standard resistance
      for LHD:
      Tester Connection Switch Condition Specified Condition
      N6-2 (UP) - N6-5 (GND) Manual UP operation Below 1 Ω
      N6-10 (DOWN) - N6-5 (GND) Manual DOWN operation Below 1 Ω
      for RHD:
      Tester Connection Switch Condition Specified Condition
      N17-2 (UP) - N17-5 (GND) Manual UP operation Below 1 Ω
      N17-10 (DOWN) - N17-5 (GND) Manual DOWN operation Below 1 Ω

    NG
    OK
  12. CHECK HARNESS AND CONNECTOR (FRONT PASSENGER SIDE DOOR ECU - FRONT PASSENGER SIDE SWITCH)


    1. A01GLQBE04

      Disconnect the P4*1 or P10*2 ECU connector.

    2. Disconnect the N6*1 or N17*2 switch connector.

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

      Standard resistance
      for LHD:
      Tester Connection Condition Specified Condition
      P4-27 (SGND) - N6-5 (GND) Always Below 1 Ω
      P4-27 (SGND) or N6-5 (GND) - Body ground Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      P10-27 (SGND) - N17-5 (GND) Always Below 1 Ω
      P10-27 (SGND) or N17-5 (GND) - Body ground Always 10 kΩ or higher

    NG
    OK
  13. CHECK HARNESS AND CONNECTOR (FRONT PASSENGER SIDE DOOR ECU - FRONT PASSENGER SIDE MOTOR)


    1. A01GMXYE06

      Disconnect the N1*1 or N10*2 ECU connector.

    2. Disconnect the N3*1 or N11*2 motor connector.

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

      Standard resistance
      for LHD:
      Tester Connection Condition Specified Condition
      N1-5 (BDRJ) - N3-2 (B) Always Below 1 Ω
      N1-2 (PWE) - N3-1 (E) Always Below 1 Ω
      N1-5 (BDRJ) or N3-2 (B) - Body ground Always 10 kΩ or higher
      N1-2 (PWE) or N3-1 (E) - Body ground Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      N10-5 (BDRJ) - N11-2 (B) Always Below 1 Ω
      N10-2 (PWE) - N11-1 (E) Always Below 1 Ω
      N10-5 (BDRJ) or N11-2 (B) - Body ground Always 10 kΩ or higher
      N10-2 (PWE) or N11-1 (E) - Body ground Always 10 kΩ or higher

    NG
    OK
  14. CHECK HARNESS AND CONNECTOR (FRONT PASSENGER SIDE SWITCH - FRONT PASSENGER SIDE MOTOR)


    1. A01GKL3E10

      Disconnect the N6*1 or N17*2 switch connector.

    2. Disconnect the N3*1 or N11*2 motor connector.

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

      Standard resistance
      for LHD:
      Tester Connection Condition Specified Condition
      N6-2 (UP) - N3-10 (UP1) Always Below 1 Ω
      N6-10 (DOWN) - N3-7 (DWN1) Always Below 1 Ω
      N6-4 (AUTO) - N3-4 (AUTO) Always Below 1 Ω
      N6-2 (UP) or N3-10 (UP1) - Body ground Always 10 kΩ or higher
      N6-10 (DOWN) or N3-7 (DWN1) - Body ground Always 10 kΩ or higher
      N6-4 (AUTO) or N3-4 (AUTO) - Body ground Always 10 kΩ or higher
      for RHD:
      Tester Connection Condition Specified Condition
      N17-2 (UP) - N11-10 (UP1) Always Below 1 Ω
      N17-10 (DOWN) - N11-7 (DWN1) Always Below 1 Ω
      N17-4 (AUTO) - N11-4 (AUTO) Always Below 1 Ω
      N17-2 (UP) or N11-10 (UP1) - Body ground Always 10 kΩ or higher
      N17-10 (DOWN) or N11-7 (DWN1) - Body ground Always 10 kΩ or higher
      N17-4 (AUTO) or N11-4 (AUTO) - Body ground Always 10 kΩ or higher
      Result:
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    B
    C
    A
  15. READ VALUE USING INTELLIGENT TESTER (REAR MOTOR LH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn ON the intelligent tester.

    4. Enter the following menus.


      1. Select: Body / RL-Door Motor / Data List /

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

      RL-Door Motor:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RL Door P/W Auto SW Rear power window LH remote auto UP/DOWN switch signal / ON or OFF

      ON: Rear power window LH remote auto UP/DOWN switch on master switch operated

      OFF: Rear power window LH switch on master switch not operated

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

      ON: Rear power window LH remote manual UP switch on master switch operated

      OFF: Rear power window LH switch on master switch not operated

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

      ON: Rear power window LH remote manual DOWN switch on master switch operated

      OFF: Rear power window LH switch on master switch not operated

      -
      OK
      Tester display changes normally when rear power window switch LH is operated.

    NG
    OK
  16. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Rear LH)


    1. A01GJPFE13

      Remove the switch.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      O18-2 (UP) - O18-5 (GND) Manual UP operation Below 1 Ω
      O18-10 (DOWN) - O18-5 (GND) Manual DOWN operation Below 1 Ω

    NG
    OK
  17. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU LH - REAR SWITCH LH)


    1. A01GLQBE02

      Disconnect the O15 ECU connector.

    2. Disconnect the O18 switch connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      O15-25 (SGND) - O18-5 (GND) Always Below 1 Ω
      O15-25 (SGND) or O18-5 (GND) - Body ground Always 10 kΩ or higher

    NG
    OK
  18. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU LH - REAR MOTOR LH)


    1. A01GMXYE03

      Disconnect the O14 ECU connector.

    2. Disconnect the O19 motor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      O14-5 (BDRJ) - O19-2 (B) Always Below 1 Ω
      O14-2 (PWE) - O19-1 (E) Always Below 1 Ω
      O14-5 (BDRJ) or O19-2 (B) - Body ground Always 10 kΩ or higher
      O14-2 (PWE) or O19-1 (E) - Body ground Always 10 kΩ or higher

    NG
    OK
  19. CHECK HARNESS AND CONNECTOR (REAR SWITCH LH - REAR MOTOR LH)


    1. A01GKL3E02

      Disconnect the O18 switch connector.

    2. Disconnect the O19 motor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      O18-2 (UP) - O19-10 (UP1) Always Below 1 Ω
      O18-10 (DOWN) - O19-7 (DWN1) Always Below 1 Ω
      O18-4 (AUTO) - O19-4 (AUTO) Always Below 1 Ω
      O18-2 (UP) or O19-10 (UP1) - Body ground Always 10 kΩ or higher
      O18-10 (DOWN) or O19-7 (DWN1) - Body ground Always 10 kΩ or higher
      O18-4 (AUTO) or O19-4 (AUTO) - Body ground Always 10 kΩ or higher

    NG
    OK
  20. READ VALUE USING INTELLIGENT TESTER (REAR MOTOR RH)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine on (IG).

    3. Turn ON the intelligent tester.

    4. Enter the following menus.


      1. Select: Body / RR-Door Motor / Data List /

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

      RR-Door Motor:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RR Door P/W Auto SW Rear power window RH remote auto UP/DOWN switch signal / ON or OFF

      ON: Rear power window RH remote auto UP/DOWN switch on master switch operated

      OFF: Rear power window RH switch on master switch not operated

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

      ON: Rear power window RH remote manual UP switch on master switch operated

      OFF: Rear power window RH switch on master switch not operated

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

      ON: Rear power window RH remote manual DOWN switch on master switch operated

      OFF: Rear power window RH switch on master switch not operated

      -
      OK
      Tester display changes normally when rear power window switch RH is operated.

    NG
    OK
  21. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Rear RH)


    1. A01GJPFE14

      Remove the switch.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      O7-2 (UP) - O7-5 (GND) Manual UP operation Below 1 Ω
      O7-10 (DOWN) - O7-5 (GND) Manual DOWN operation Below 1 Ω

    NG
    OK
  22. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU RH - REAR SWITCH RH)


    1. A01GLQBE03

      Disconnect the O2 ECU connector.

    2. Disconnect the O7 switch connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      O2-25 (SGND) - O7-5 (GND) Always Below 1 Ω
      O2-25 (SGND) or O7-5 (GND) - Body ground Always 10 kΩ or higher

    NG
    OK
  23. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU RH - REAR MOTOR RH)


    1. A01GMXYE04

      Disconnect the O3 ECU connector.

    2. Disconnect the O8 motor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      O3-5 (BDRJ) - O8-2 (B) Always Below 1 Ω
      O3-2 (PWE) - O8-1 (E) Always Below 1 Ω
      O3-5 (BDRJ) or O8-2 (B) - Body ground Always 10 kΩ or higher
      O3-2 (PWE) or O8-1 (E) - Body ground Always 10 kΩ or higher

    NG
    OK
  24. CHECK HARNESS AND CONNECTOR (REAR SWITCH RH - REAR MOTOR RH)


    1. A01GKL3E03

      Disconnect the O7 switch connector.

    2. Disconnect the O8 motor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      O7-2 (UP) - O8-10 (UP1) Always Below 1 Ω
      O7-10 (DOWN) - O8-7 (DWN1) Always Below 1 Ω
      O7-4 (AUTO) - O8-4 (AUTO) Always Below 1 Ω
      O7-2 (UP) or O8-10 (UP1) - Body ground Always 10 kΩ or higher
      O7-10 (DOWN) or O8-7 (DWN1) - Body ground Always 10 kΩ or higher
      O7-4 (AUTO) or O8-4 (AUTO) - Body ground Always 10 kΩ or higher

    NG
    OK