POWER WINDOW CONTROL SYSTEM, Diagnostic DTC:B2312

DTC Code DTC Name
B2312 Power Window Switch Malfunction

DESCRIPTION

The power window regulator motor assembly is operated by the multiplex network master switch assembly or power window regulator switch assembly. The power window regulator motor assembly has motor, regulator and ECU functions.

This DTC is output when the ECU built into the regulator motor determines that the multiplex network master switch assembly or power window regulator switch assembly is stuck.

Tech Tips

DTC B2312 can be stored in the multiplex network master switch assembly and in each power window regulator motor assembly (power window ECU).

Master Switch (Multiplex Network Master Switch Assembly)
DTC No. DTC Detection Condition Trouble Area
B2312 Multiplex network master switch assembly stuck

  • Multiplex network master switch assembly

  • Multiplex network master switch assembly held in same position for more than 20 seconds
D-Door Motor (Power Window Regulator Motor Assembly (for Driver Side))
DTC No. DTC Detection Condition Trouble Area
B2312 Multiplex network master switch assembly (for driver side) stuck

  • Multiplex network master switch assembly

  • Power window regulator motor assembly (for driver side)

  • Wire harness or connector

  • Multiplex network master switch assembly held in same position for more than 20 seconds
P-Door Motor (Power Window Regulator Motor Assembly (for Front Passenger Side))
DTC No. DTC Detection Condition Trouble Area
B2312 Power window regulator switch assembly (for front passenger side) stuck

  • Power window regulator switch assembly (for front passenger side)

  • Power window regulator motor assembly (for front passenger side)

  • Wire harness or connector

  • Power window regulator switch assembly held in same position for more than 20 seconds
RL-Door Motor (Power Window Regulator Motor Assembly (for Rear LH Side))
DTC No. DTC Detection Condition Trouble Area
B2312 Power window regulator switch assembly (for rear LH side) stuck

  • Power window regulator switch assembly (for rear LH side)

  • Power window regulator motor assembly (for rear LH side)

  • Wire harness or connector

  • Power window regulator switch assembly held in same position for more than 20 seconds
RR-Door Motor (Power Window Regulator Motor Assembly (for Rear RH Side))
DTC No. DTC Detection Condition Trouble Area
B2312 Power window regulator switch assembly (for rear RH side) stuck

  • Power window regulator switch assembly (for rear RH side)

  • Power window regulator motor assembly (for rear RH side)

  • Wire harness or connector

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

WIRING DIAGRAM


  1. for Driver Side

    A01CBB9E11

  2. for Front Passenger Side

    A01CBKPE70

  3. for Rear LH Side

    A01CBKPE71

  4. for Rear RH Side

    A01CBKPE72

INSPECTION PROCEDURE

Note


  • When the power window regulator motor assembly 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 reinitialized by repeating the following operations at least 5 times:


    1. Close the power window by fully pulling up the multiplex network master switch assembly or power window regulator switch assembly and holding it at the auto up position.

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

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Clear the DTC Click here.

    2. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC output from multiplex network master switch assembly A
      DTC output from power window regulator motor assembly (for driver side) B
      DTC output from power window regulator motor assembly (for front passenger side) C
      DTC output from power window regulator motor assembly (for rear LH side) D
      DTC output from power window regulator motor assembly (for rear RH side) E

    B

    READ VALUE USING INTELLIGENT TESTER (D-Door Motor) Click here

    C

    READ VALUE USING INTELLIGENT TESTER (P-Door Motor) Click here

    D

    READ VALUE USING INTELLIGENT TESTER (RL-Door Motor) Click here

    E

    READ VALUE USING INTELLIGENT TESTER (RR-Door Motor) Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (Master Switch)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Master Switch / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Master Switch (Multiplex Network Master Switch Assembly)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door P/W Auto SW Driver side power window auto switch signal / ON or OFF

      ON: Driver side power window auto switch operated

      OFF: Driver side power window auto switch not operated

      		 -
      P Door P/W Auto SW Front passenger side power window auto up/down switch signal / ON or OFF

      ON: Front passenger door power window auto switch operated

      OFF: Front passenger door power window auto switch not operated

      		 -
      RL Door P/W Auto SW Rear LH side power window auto up/down switch signal / ON or OFF

      ON: Rear LH power window auto switch operated

      OFF: Rear LH power window auto switch not operated

      		 -
      RR Door P/W Auto SW Rear RH side power window auto up/down switch signal / ON or OFF

      ON: Rear RH power window auto switch operated

      OFF: Rear RH power window auto switch not operated

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

      ON: Front passenger door power window manual up switch operated

      OFF: Front passenger door power window manual up switch not operated

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

      ON: Rear LH power window manual up switch operated

      OFF: Rear LH power window manual up switch not operated

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

      ON: Rear RH power window manual up switch operated

      OFF: Rear RH power window manual up switch not operated

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

      ON: Front passenger door power window manual down switch operated

      OFF: Front passenger door power window manual down switch not operated

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

      ON: Rear LH power window manual down switch operated

      OFF: Rear LH power window manual down switch not operated

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

      ON: Rear RH power window manual down switch operated

      OFF: Rear RH power window manual down switch not operated

      		 -
      Window Lock Switch Status Window lock switch signal / ON or OFF

      ON: Window lock switch LOCK position

      OFF: Window lock switch UNLOCK position

      		 -
      OK
      On the intelligent tester screen, ON or OFF is displayed accordingly.

    NG

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    OK

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

  3. READ VALUE USING INTELLIGENT TESTER (D-Door Motor)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Read the Data List according to the display on the intelligent tester.

      D-Door Motor (Power Window Regulator Motor Assembly (for Driver Side))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      D Door P/W Up SW Driver side power window manual up switch signal / ON or OFF

      ON: Driver door power window manual up switch operated

      OFF: Driver door power window manual up switch not operated

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

      ON: Driver door power window manual down switch operated

      OFF: Driver door power window manual down switch not operated

      		 -
      OK
      On the intelligent tester screen, ON or OFF is displayed accordingly.

    NG

    CHECK HARNESS AND CONNECTOR (MASTER SWITCH - DRIVER SIDE MOTOR) Click here

    OK

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

  4. CHECK HARNESS AND CONNECTOR (MASTER SWITCH - DRIVER SIDE MOTOR)


    1. Disconnect the multiplex network master switch assembly connector.

    2. Disconnect the power window regulator motor assembly (for driver side) connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      J10-20 (UP) - Body ground Always 10 kΩ or higher
      J10-15 (DOWN) - Body ground Always 10 kΩ or higher
      J4-10 (UP) - Body ground Always 10 kΩ or higher
      J4-7 (DOWN) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      I3-20 (UP) - Body ground Always 10 kΩ or higher
      I3-15 (DOWN) - Body ground Always 10 kΩ or higher
      I4-10 (UP) - Body ground Always 10 kΩ or higher
      I4-7 (DOWN) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Side) Click here

  5. READ VALUE USING INTELLIGENT TESTER (P-Door Motor)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Read the Data List according to the display on the intelligent tester.

      P-Door Motor (Power Window Regulator Motor Assembly (for Front Passenger Side))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      P Door P/W Auto SW Front passenger side power window auto up/down switch signal / ON or OFF

      ON: Front passenger side door power window auto switch operated

      OFF: Front passenger side door power window auto switch not operated

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

      ON: Front passenger side door power window manual up switch operated

      OFF: Front passenger side door power window manual up switch not operated

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

      ON: Front passenger side door power window manual down switch operated

      OFF: Front passenger side door power window manual down switch not operated

      		 -
      OK
      On the intelligent tester screen, ON or OFF is displayed accordingly.

    NG

    INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Front Passenger Side) Click here

    OK

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

  6. INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Front Passenger Side)


    1. A01CFEXE01

      Remove the power window regulator switch assembly (for front passenger side) 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) Auto up or up position Below 1 Ω
      7 (DOWN) - 1 (GND) Auto down or down position Below 1 Ω
      8 (AUTO) - 1 (GND) Auto up or auto down position Below 1 Ω
      6 (UP) - 1 (GND) Free 10 kΩ or higher
      7 (DOWN) - 1 (GND) Free 10 kΩ or higher
      8 (AUTO) - 1 (GND) Free 10 kΩ or higher

    NG

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Front Passenger Side) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (FRONT PASSENGER SIDE SWITCH - FRONT PASSENGER SIDE MOTOR)


    1. Disconnect the power window regulator motor assembly (for front passenger side) connector.

    2. Measure the resistance of the wire harness side connectors.

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      I18-6 (UP) - Body ground Always 10 kΩ or higher
      I18-7 (DOWN) - Body ground Always 10 kΩ or higher
      I18-8 (AUTO) - Body ground Always 10 kΩ or higher
      I4-10 (UP) - Body ground Always 10 kΩ or higher
      I4-7 (DOWN) - Body ground Always 10 kΩ or higher
      I4-4 (AUTO) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      J3-6 (UP) - Body ground Always 10 kΩ or higher
      J3-7 (DOWN) - Body ground Always 10 kΩ or higher
      J3-8 (AUTO) - Body ground Always 10 kΩ or higher
      J4-10 (UP) - Body ground Always 10 kΩ or higher
      J4-7 (DOWN) - Body ground Always 10 kΩ or higher
      J4-4 (AUTO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Side) Click here

  8. READ VALUE USING INTELLIGENT TESTER (RL-Door Motor)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Read the Data List according to the display on the intelligent tester.

      RL-Door Motor (Power Window Regulator Motor Assembly (for Rear LH Side))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RL Door P/W Auto SW Rear LH side power window auto up/down switch signal / ON or OFF

      ON: Rear LH door power window auto switch operated

      OFF: Rear LH door power window auto switch not operated

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

      ON: Rear LH door power window manual up switch operated

      OFF: Rear LH door power window manual up switch not operated

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

      ON: Rear LH door power window manual down switch operated

      OFF: Rear LH door power window manual down switch not operated

      		 -
      OK
      On the intelligent tester screen, ON or OFF is displayed accordingly.

    NG

    INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Rear LH Side) Click here

    OK

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

  9. INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Rear LH Side)


    1. A01CFEXE02

      Remove the power window regulator switch assembly (for rear LH side) 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) Auto up or up position Below 1 Ω
      7 (DOWN) - 1 (GND) Auto down or down position Below 1 Ω
      8 (AUTO) - 1 (GND) Auto up or auto down position Below 1 Ω
      6 (UP) - 1 (GND) Free 10 kΩ or higher
      7 (DOWN) - 1 (GND) Free 10 kΩ or higher
      8 (AUTO) - 1 (GND) Free 10 kΩ or higher

    NG

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Rear LH side) Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (REAR LH SWITCH - REAR LH MOTOR)


    1. Disconnect the power window regulator motor assembly (for rear LH side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L1-6 (UP) - Body ground Always 10 kΩ or higher
      L1-7 (DOWN) - Body ground Always 10 kΩ or higher
      L1-8 (AUTO) - Body ground Always 10 kΩ or higher
      L2-10 (UP) - Body ground Always 10 kΩ or higher
      L2-7 (DOWN) - Body ground Always 10 kΩ or higher
      L2-4 (AUTO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH side) Click here

  11. READ VALUE USING INTELLIGENT TESTER (RR-Door Motor)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

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

    5. Read the Data List according to the display on the intelligent tester.

      RR-Door Motor (Power Window Regulator Motor Assembly (for Rear RH Side))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RR Door P/W Auto SW Rear RH side power window auto up/down switch signal / ON or OFF

      ON: Rear RH door power window auto switch operated

      OFF: Rear RH door power window auto switch not operated

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

      ON: Rear RH door power window manual up switch operated

      OFF: Rear RH door power window manual up switch not operated

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

      ON: Rear RH door power window manual down switch operated

      OFF: Rear RH door power window manual down switch not operated

      		 -
      OK
      On the intelligent tester screen, ON or OFF is displayed accordingly.

    NG

    INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Rear RH Side) Click here

    OK

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

  12. INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Rear RH Side)


    1. A01CFEXE03

      Remove the power window regulator switch assembly (for rear RH side) 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) Auto up or up position Below 1 Ω
      7 (DOWN) - 1 (GND) Auto down or down position Below 1 Ω
      8 (AUTO) - 1 (GND) Auto up or auto down position Below 1 Ω
      6 (UP) - 1 (GND) Free 10 kΩ or higher
      7 (DOWN) - 1 (GND) Free 10 kΩ or higher
      8 (AUTO) - 1 (GND) Free 10 kΩ or higher

    NG

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY (for Rear RH side) Click here

    OK

  13. CHECK HARNESS AND CONNECTOR (REAR RH SWITCH - REAR RH MOTOR)


    1. Disconnect the power window regulator motor assembly (for rear RH side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K1-6 (UP) - Body ground Always 10 kΩ or higher
      K1-7 (DOWN) - Body ground Always 10 kΩ or higher
      K1-8 (AUTO) - Body ground Always 10 kΩ or higher
      K2-10 (UP) - Body ground Always 10 kΩ or higher
      K2-7 (DOWN) - Body ground Always 10 kΩ or higher
      K2-4 (AUTO) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH side) Click here