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 or power window regulator switch assembly. 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 or 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

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

  • Multiplex network master switch assembly operated for 20 seconds or more

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

  • 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 LH (for LHD)

  • 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

  • Power window regulator motor assembly RH (for LHD)

  • Power window regulator motor assembly LH (for RHD)

  • Harness or connector

WIRING DIAGRAM


  1. DRIVER SIDE

    B004CF7E01
    B004CF7E02

  2. PASSENGER SIDE

    B004BEPE01
    B004BEPE02

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

    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
      OK
      DTC B2312 is not output.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  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

    A

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    C

    READ VALUE USING GTS (P-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 POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    B

    REPLACE 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. B004A5TC02
      *a

      Front view of wire harness connector

      (to Power Window Regulator Motor Assembly LH)

      Disconnect the 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
      S2-10 (UP) - Body ground Power switch on (IG) 11 to 14 V
      S2-7 (DOWN) - Body ground Power switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    NG

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


    1. Disconnect the U2 multiplex network master switch assembly connector.

    2. Disconnect the S2 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
      U2-20 (UP) - Body ground Always 10 kΩ or higher
      U2-15 (DOWN) - Body ground Always 10 kΩ or higher
      S2-10 (UP) - Body ground Always 10 kΩ or higher
      S2-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    NG

  6. INSPECT FRONT DOOR WIRE LH


    1. Turn the power switch off.

      B004CCVC06
      *1 Front Door Wire LH - -
      *a

      Front view of wire harness connector

      (to Multiplex Network Master Switch Assembly Side Connector)

      		 *b

      Front view of wire harness connector

      (to Vehicle Side Connector)

    2. Disconnect the U2 front door wire LH connector.

    3. Disconnect the US1 front door wire LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U2-20 (UP) - Body ground Always 10 kΩ or higher
      U2-15 (DOWN) - Body ground Always 10 kΩ or higher
      US1-5 - Body ground Always 10 kΩ or higher
      US1-13 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE FRONT DOOR WIRE LH Click here

  7. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. B004A5TC03
      *a

      Front view of wire harness connector

      (to Power Window Regulator Motor Assembly RH)

      Disconnect the 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
      R2-10 (UP) - Body ground Power switch on (IG) 11 to 14 V
      R2-7 (DOWN) - Body ground Power switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    NG

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


    1. Disconnect the T2 multiplex network master switch assembly connector.

    2. Disconnect the R2 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
      T2-20 (UP) - Body ground Always 10 kΩ or higher
      T2-15 (DOWN) - Body ground Always 10 kΩ or higher
      R2-10 (UP) - Body ground Always 10 kΩ or higher
      R2-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    NG

    INSPECT FRONT DOOR WIRE RH Click here

  9. 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 POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    B

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    C

    INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY Click here

  10. INSPECT FRONT DOOR WIRE RH


    1. Turn the power switch off.

      B004CCVC07
      *1 Front Door Wire RH - -
      *a

      Front view of wire harness connector

      (to Multiplex Network Master Switch Assembly Side Connector)

      		 *b

      Front view of wire harness connector

      (to Vehicle Side Connector)

    2. Disconnect the T2 front door wire RH connector.

    3. Disconnect the TR1 front door wire RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T2-20 (UP) - Body ground Always 10 kΩ or higher
      T2-15 (DOWN) - Body ground Always 10 kΩ or higher
      TR1-5 - Body ground Always 10 kΩ or higher
      TR1-13 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE FRONT DOOR WIRE RH Click here

  11. 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 - POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) Click here

    C

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY Click here

    A

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


    1. Disconnect the T1 power window regulator switch assembly connector.

    2. Disconnect the R2 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
      T1-2 (UP) - Body ground Always 10 kΩ or higher
      T1-4 (AUTO) - Body ground Always 10 kΩ or higher
      T1-10 (DOWN) - Body ground Always 10 kΩ or higher
      R2-10 (UP) - Body ground Always 10 kΩ or higher
      R2-4 (AUTO) - Body ground Always 10 kΩ or higher
      R2-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Click here

    NG

  13. INSPECT FRONT DOOR WIRE RH


    1. Turn the power switch off.

      B0049UBC04
      *1 Front Door Wire RH - -
      *a

      Front view of wire harness connector

      (to Vehicle Side Connector)

      		 *b

      Front view of wire harness connector

      (to Power Window Regulator Switch Assembly Side Connector)

    2. Disconnect the T1 front door wire RH connector.

    3. Disconnect the TR1 front door wire RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T1-2 (UP) - Body ground Always 10 kΩ or higher
      T1-10 (DOWN) - Body ground Always 10 kΩ or higher
      T1-4 (AUTO) - Body ground Always 10 kΩ or higher
      TR1-5 - Body ground Always 10 kΩ or higher
      TR1-13 - Body ground Always 10 kΩ or higher
      TR1-6 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE FRONT DOOR WIRE RH Click here

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


    1. Disconnect the U1 power window regulator switch assembly connector.

    2. Disconnect the S2 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
      U1-2 (UP) - Body ground Always 10 kΩ or higher
      U1-4 (AUTO) - Body ground Always 10 kΩ or higher
      U1-10 (DOWN) - Body ground Always 10 kΩ or higher
      S2-10 (UP) - Body ground Always 10 kΩ or higher
      S2-4 (AUTO) - Body ground Always 10 kΩ or higher
      S2-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Click here

    NG

  15. INSPECT FRONT DOOR WIRE LH


    1. Turn the power switch off.

      B0049UBC07
      *1 Front Door Wire LH - -
      *a

      Front view of wire harness connector

      (to Vehicle Side Connector)

      		 *b

      Front view of wire harness connector

      (to Power Window Regulator Switch Assembly Side Connector)

    2. Disconnect the U1 front door wire LH connector.

    3. Disconnect the US1 front door wire LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U1-2 (UP) - Body ground Always 10 kΩ or higher
      U1-10 (DOWN) - Body ground Always 10 kΩ or higher
      U1-4 (AUTO) - Body ground Always 10 kΩ or higher
      US1-5 - Body ground Always 10 kΩ or higher
      US1-13 - Body ground Always 10 kΩ or higher
      US1-6 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE FRONT DOOR WIRE LH Click here