POWER WINDOW CONTROL SYSTEM, Diagnostic DTC:B2312

DTC Code DTC Name
B2312 Power Window Switch Malfunction

DESCRIPTION

The power window regulator motor assemblies are operated by the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assemblies. The power window regulator motor assemblies have motor, regulator and ECU functions.

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

Master Switch
DTC No. Detection Item DTC Detection Condition Trouble Area
B2312 Power Window Switch Malfunction

  • Multiplex network master switch assembly stuck (except driver door)

  • Multiplex network master switch assembly held in same position for more than 20 seconds (except driver door)

 Multiplex network master switch assembly
D-Door Motor
DTC No. Detection Item DTC Detection Condition Trouble Area
B2312 Power Window Switch Malfunction

  • Front power window regulator motor assembly LH stuck (for LHD)

  • Front power window regulator motor assembly RH stuck (for RHD)

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

  • Multiplex network master switch assembly

  • Front power window regulator motor assembly LH (for LHD)

  • Front power window regulator motor assembly RH (for RHD)

  • Harness or connector
P-Door Motor
DTC No. Detection Item DTC Detection Condition Trouble Area
B2312 Power Window Switch Malfunction

  • Power window regulator switch assembly stuck

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

  • Power window regulator switch assembly

  • Front power window regulator motor assembly RH (for LHD)

  • Front power window regulator motor assembly LH (for RHD)

  • Harness or connector
RL-Door Motor
DTC No. Detection Item DTC Detection Condition Trouble Area
B2312 Power Window Switch Malfunction

  • Rear power window regulator switch assembly LH stuck

  • Rear power window regulator switch assembly LH held in same position for more than 20 seconds

  • Rear power window regulator switch assembly LH

  • Rear power window regulator motor assembly LH

  • Harness or connector
RR-Door Motor
DTC No. Detection Item DTC Detection Condition Trouble Area
B2312 Power Window Switch Malfunction

  • Rear power window regulator switch assembly RH stuck

  • Rear power window regulator switch assembly RH held in same position for more than 20 seconds

  • Rear power window regulator switch assembly RH

  • Rear power window regulator motor assembly RH

  • Harness or connector

WIRING DIAGRAM


  1. for LHD:

    B006E7XE05
    B006DAQE05
    B006FBQE05
    B006FI6E05
    B006DHQE02
    *1 Instrument panel junction Block Assembly
    *2 Main Body ECU (Multiplex Network Body ECU)
    *3 LIN Communication Line

  2. for RHD:

    B006AMWE05
    B006GSNE06
    B006CIOE05
    B006DU2E05
    B006DHQE03
    *1 Instrument panel junction Block Assembly
    *2 Main Body ECU (Multiplex Network Body ECU)
    *3 LIN Communication Line

CAUTION / NOTICE / HINT

Note


  • DTC B2312 is stored in the multiplex network master switch assembly and in each power window regulator motor assembly.

  • If a power window regulator motor assembly has been replaced with a new one, initialize the power window control system.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • The power window control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power window control system after confirming that the communication system is functioning properly.

    Click here

Tech Tips

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

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Master Switch > Clear DTCs
      Body Electrical > D-Door Motor > Clear DTCs
      Body Electrical > P-Door Motor > Clear DTCs
      Body Electrical > RL-Door Motor > Clear DTCs
      Body Electrical > RR-Door Motor > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > Master Switch > Trouble Codes
      Body Electrical > D-Door Motor > Trouble Codes
      Body Electrical > P-Door Motor > Trouble Codes
      Body Electrical > RL-Door Motor > Trouble Codes
      Body Electrical > RR-Door Motor > Trouble Codes
      Result
      Result Proceed to
      DTC B2312 is not output A
      DTC B2312 is output B

    A

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

    B

  2. CHECK FOR DTC


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

      Result
      Result Proceed to
      DTC output from Master Switch A
      DTC output from D-Door Motor B
      DTC output from P-Door Motor C
      DTC output from RL-Door Motor D
      DTC output from RR-Door Motor E

    A

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    C

    READ VALUE USING GTS (P-DOOR MOTOR) Click here

    D

    READ VALUE USING GTS (RL-DOOR MOTOR) Click here

    E

    READ VALUE USING GTS (RR-DOOR MOTOR) Click here

    B

  3. READ VALUE USING GTS (D-DOOR MOTOR)


    1. Read the Data List according to the display on the GTS.

      Click here


      Body Electrical > D-Door Motor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      D Door P/W Up SW Driver door power window manual up switch signal OFF or ON

      OFF: Driver door power window manual up switch not being operated

      ON: Driver door power window manual up switch being operated

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

      OFF: Driver door power window manual down switch not being operated

      ON: Driver door power window manual down switch being operated

      		 -

      Body Electrical > D-Door Motor > Data List
      Tester Display
      D Door P/W Up SW
      D Door P/W Down SW
      OK
      On the GTS screen, ON or OFF is displayed accordingly.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG (for LHD) C
      NG (for RHD) D

    A

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    B

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    D

    CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    C

  4. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. B006F64C19
      *a

      Front view of wire harness connector

      (to Front Power Window Regulator Motor Assembly LH)

      Disconnect the front power window regulator motor assembly LH connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H21-10 (UP) - Body ground Engine switch on (IG) 11 to 14 V
      H21-7 (DOWN) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH)


    1. Disconnect the I5 multiplex network master switch assembly connector.

    2. Disconnect the H21 front power window regulator motor assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I5-20 (UP) - Body ground Always 10 kΩ or higher
      I5-15 (DOWN) - Body ground Always 10 kΩ or higher
      H21-10 (UP) - Body ground Always 10 kΩ or higher
      H21-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. B006F64C20
      *a

      Front view of wire harness connector

      (to Front Power Window Regulator Motor Assembly RH)

      Disconnect the front power window regulator motor assembly RH connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      H2-10 (UP) - Body ground Engine switch on (IG) 11 to 14 V
      H2-7 (DOWN) - Body ground Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    NG

  7. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH)


    1. Disconnect the I2 multiplex network master switch assembly connector.

    2. Disconnect the H2 front power window regulator motor assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I2-20 (UP) - Body ground Always 10 kΩ or higher
      I2-15 (DOWN) - Body ground Always 10 kΩ or higher
      H2-10 (UP) - Body ground Always 10 kΩ or higher
      H2-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. READ VALUE USING GTS (P-DOOR MOTOR)


    1. Read the Data List according to the display on the GTS.

      Click here


      Body Electrical > P-Door Motor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      P Door P/W Auto SW Front passenger door power window auto switch signal OFF or ON

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

      ON: Front passenger door power window auto switch being operated

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

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

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

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

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

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

      		 -

      Body Electrical > P-Door Motor > Data List
      Tester Display
      P Door P/W Auto SW
      P Door P/W Up SW
      P Door P/W Down SW
      OK
      On the GTS screen, ON or OFF is displayed accordingly.
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    A

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    B

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    C

  9. INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY


    1. Remove the power window regulator switch assembly.

      Click here

    2. Inspect the power window regulator switch assembly.

      Click here

      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) Click here

    C

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY Click here

    A

  10. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH)


    1. Disconnect the I1 power window regulator switch assembly connector.

    2. Disconnect the H2 front power window regulator motor assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I1-2 (UP) - Body ground Always 10 kΩ or higher
      I1-4 (AUTO) - Body ground Always 10 kΩ or higher
      I1-10 (DOWN) - Body ground Always 10 kΩ or higher
      H2-10 (UP) - Body ground Always 10 kΩ or higher
      H2-4 (AUTO) - Body ground Always 10 kΩ or higher
      H2-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH)


    1. Disconnect the I4 power window regulator switch assembly connector.

    2. Disconnect the H21 front power window regulator motor assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I4-2 (UP) - Body ground Always 10 kΩ or higher
      I4-4 (AUTO) - Body ground Always 10 kΩ or higher
      I4-10 (DOWN) - Body ground Always 10 kΩ or higher
      H21-10 (UP) - Body ground Always 10 kΩ or higher
      H21-4 (AUTO) - Body ground Always 10 kΩ or higher
      H21-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. READ VALUE USING GTS (RL-DOOR MOTOR)


    1. Read the Data List according to the display on the GTS.

      Click here


      Body Electrical > RL-Door Motor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RL Door P/W Auto SW Rear LH door power window auto switch signal OFF or ON

      OFF: Rear LH door power window auto switch not being operated

      ON: Rear LH door power window auto switch being operated

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

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

      ON: Rear LH door power window manual up switch being operated

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

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

      ON: Rear LH door power window manual down switch being operated

      		 -

      Body Electrical > RL-Door Motor > Data List
      Tester Display
      RL Door P/W Auto SW
      RL Door P/W Up SW
      RL Door P/W Down SW
      OK
      On the GTS screen, ON or OFF is displayed accordingly.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    NG

  13. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY LH


    1. Remove the rear power window regulator switch assembly LH.

      Click here

    2. Inspect the rear power window regulator switch assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY LH Click here

    OK

  14. CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY LH - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH)


    1. Disconnect the J5 rear power window regulator switch assembly LH connector.

    2. Disconnect the K15 rear power window regulator motor assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J5-2 (UP) - Body ground Always 10 kΩ or higher
      J5-4 (AUTO) - Body ground Always 10 kΩ or higher
      J5-10 (DOWN) - Body ground Always 10 kΩ or higher
      K15-10 (UP) - Body ground Always 10 kΩ or higher
      K15-4 (AUTO) - Body ground Always 10 kΩ or higher
      K15-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  15. READ VALUE USING GTS (RR-DOOR MOTOR)


    1. Read the Data List according to the display on the GTS.

      Click here


      Body Electrical > RR-Door Motor > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RR Door P/W Auto SW Rear RH door power window auto switch signal OFF or ON

      OFF: Rear RH door power window auto switch not being operated

      ON: Rear RH door power window auto switch being operated

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

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

      ON: Rear RH door power window manual up switch being operated

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

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

      ON: Rear RH door power window manual down switch being operated

      		 -

      Body Electrical > RR-Door Motor > Data List
      Tester Display
      RR Door P/W Auto SW
      RR Door P/W Up SW
      RR Door P/W Down SW
      OK
      On the GTS screen, ON or OFF is displayed accordingly.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    NG

  16. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY RH


    1. Remove the rear power window regulator switch assembly RH.

      Click here

    2. Inspect the rear power window regulator switch assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY RH Click here

    OK

  17. CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY RH - REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH)


    1. Disconnect the J1 rear power window regulator switch assembly LH connector.

    2. Disconnect the K1 rear power window regulator motor assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J1-2 (UP) - Body ground Always 10 kΩ or higher
      J1-4 (AUTO) - Body ground Always 10 kΩ or higher
      J1-10 (DOWN) - Body ground Always 10 kΩ or higher
      K1-10 (UP) - Body ground Always 10 kΩ or higher
      K1-4 (AUTO) - Body ground Always 10 kΩ or higher
      K1-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR