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 and master switch 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 held in same position for more than 20 seconds

  • Mirror retract switch (multiplex network master switch assembly) operated for 40 seconds or more

  • Mirror adjust switch (multiplex network master switch assembly) operated for 20 seconds or more

  • Door control switch (multiplex network master switch assembly) operated for 20 seconds or more

 Multiplex network master switch assembly
D-Door Motor (Power Window Regulator Motor Assembly (for Driver Side))
DTC No. DTC Detection Condition Trouble Area
B2312

  • Multiplex network master switch assembly stuck

  • Multiplex network master switch assembly held in same position for more than 20 seconds

  • Multiplex network master switch assembly

  • Power window regulator motor assembly (for driver side)

  • Wire harness or connector
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) held in same position for more than 20 seconds

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

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

  • Wire harness or connector
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 held in same position for more than 20 seconds

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

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

  • Wire harness or connector
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 held in same position for more than 20 seconds

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

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

  • Wire harness or connector

WIRING DIAGRAM


  1. for Driver Side

    A01NCMDE05

  2. for Front Passenger Side

    A01NGEBE27

  3. for Rear LH Side

    A01NGEBE28

  4. for Rear RH Side

    A01NGEBE29

INSPECTION PROCEDURE

Note


  • If DTC B2312 is not output again after the DTC has been cleared, the DTC was output due to the switch being held.

  • 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, power window regulator switch assembly (for front passenger side) 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 FOR DTC


    1. Clear the DTC Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2312 is not output.

    NG

    CHECK DTC OUTPUT Click here

    OK

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

  2. CHECK DTC OUTPUT


    1. Check the parts which the DTCs have been output from.

      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

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

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


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power 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 door 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 door 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

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

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


    1. Disconnect the multiplex network master switch assembly connector.

    2. A01NGY5E07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Multiplex Network Master Switch Assembly)
      *2

      Front view of wire harness connector

      (to Power Window Regulator Motor Assembly (for Driver Side))
      *3 for LHD
      *4 for RHD

      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
      J7-20 (UP) - Body ground Always 10 kΩ or higher
      J7-15 (DOWN) - Body ground Always 10 kΩ or higher
      J1-10 (UP1) - Body ground Always 10 kΩ or higher
      J1-7 (DWN1) - Body ground Always 10 kΩ or higher
      for LHD
      Tester Connection Condition Specified Condition
      I12-20 (UP) - Body ground Always 10 kΩ or higher
      I12-15 (DOWN) - Body ground Always 10 kΩ or higher
      I2-10 (UP1) - Body ground Always 10 kΩ or higher
      I2-7 (DWN1) - 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 power 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 and 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

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

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


    1. A01NEJRE06
      Text in Illustration
      *1

      Component without harness connected

      (Power Window Regulator Switch Assembly (for Front Passenger Side))

      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
      2 (UP) - 5 (GND) Auto up or up position Below 1 Ω
      4 (AUTO) - 5 (GND) Auto up or auto down position Below 1 Ω
      10 (DOWN) - 5 (GND) Auto down or down position Below 1 Ω
      2 (UP) - 5 (GND) Free 10 kΩ or higher
      4 (AUTO) - 5 (GND) Free 10 kΩ or higher
      10 (DOWN) - 5 (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. A01NG57E19
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Window Regulator Switch Assembly (for Front Passenger Side))
      *2

      Front view of wire harness connector

      (to Power Window Regulator Motor Assembly (for Front Passenger Side))
      *3 for LHD
      *4 for RHD

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

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      I7-2 (UP) - Body ground Always 10 kΩ or higher
      I7-4 (AUTO) - Body ground Always 10 kΩ or higher
      I7-10 (DOWN) - Body ground Always 10 kΩ or higher
      I2-10 (UP1) - Body ground Always 10 kΩ or higher
      I2-4 (AUTO) - Body ground Always 10 kΩ or higher
      I2-7 (DWN1) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      J12-2 (UP) - Body ground Always 10 kΩ or higher
      J12-4 (AUTO) - Body ground Always 10 kΩ or higher
      J12-10 (DOWN) - Body ground Always 10 kΩ or higher
      J1-10 (UP1) - Body ground Always 10 kΩ or higher
      J1-4 (AUTO) - Body ground Always 10 kΩ or higher
      J1-7 (DWN1) - 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 power 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 and 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

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

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


    1. A01NGV2E05
      Text in Illustration
      *1

      Component without harness connected

      (Power Window Regulator Switch Assembly (for Rear LH Side))

      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
      2 (UP) - 5 (GND) Auto up or up position Below 1 Ω
      4 (AUTO) - 5 (GND) Auto up or auto down position Below 1 Ω
      10 (DOWN) - 5 (GND) Auto down or down position Below 1 Ω
      2 (UP) - 5 (GND) Free 10 kΩ or higher
      4 (AUTO) - 5 (GND) Free 10 kΩ or higher
      10 (DOWN) - 5 (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. A01NG57E20
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Window Regulator Switch Assembly (for Rear LH Side))
      *2

      Front view of wire harness connector

      (to Power Window Regulator Motor Assembly (for Rear LH Side))

      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
      L3-2 (UP) - Body ground Always 10 kΩ or higher
      L3-4 (AUTO) - Body ground Always 10 kΩ or higher
      L3-10 (DOWN) - Body ground Always 10 kΩ or higher
      L2-10 (UP1) - Body ground Always 10 kΩ or higher
      L2-4 (AUTO) - Body ground Always 10 kΩ or higher
      L2-7 (DWN1) - 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 power 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 and 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

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

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


    1. A01NGV2E05
      Text in Illustration
      *1

      Component without harness connected

      (Power Window Regulator Switch Assembly (for Rear RH Side))

      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
      2 (UP) - 5 (GND) Auto up or up position Below 1 Ω
      4 (AUTO) - 5 (GND) Auto up or auto down position Below 1 Ω
      10 (DOWN) - 5 (GND) Auto down or down position Below 1 Ω
      2 (UP) - 5 (GND) Free 10 kΩ or higher
      4 (AUTO) - 5 (GND) Free 10 kΩ or higher
      10 (DOWN) - 5 (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. A01NG57E21
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Power Window Regulator Switch Assembly (for Rear RH Side))
      *2

      Front view of wire harness connector

      (to Power Window Regulator Motor Assembly (for Rear RH Side))

      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
      K3-2 (UP) - Body ground Always 10 kΩ or higher
      K3-4 (AUTO) - Body ground Always 10 kΩ or higher
      K3-10 (DOWN) - Body ground Always 10 kΩ or higher
      K2-10 (UP1) - Body ground Always 10 kΩ or higher
      K2-4 (AUTO) - Body ground Always 10 kΩ or higher
      K2-7 (DWN1) - 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