POWER WINDOW CONTROL SYSTEM(for Models with Jam Protection Function on Front Door Windows), Diagnostic DTC:B2312

DTC Code DTC Name
B2312 Power Window Switch Malfunction

DESCRIPTION

The power window regulator motor assemblies are operated by the power window regulator 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 the ECU built into a power window regulator motor assembly and power window regulator master switch assembly determine that the power window regulator 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

  • Power window regulator master switch assembly stuck

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

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

  • Power window regulator master switch assembly stuck

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

  • Power window regulator master switch assembly

  • Power window regulator motor assembly (for driver door)

  • Wire 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 (for front passenger door)

  • Wire harness or connector

WIRING DIAGRAM

A018JMGE02

CAUTION / NOTICE / HINT

Note


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

  • If the power window regulator motor assembly (for driver door) or power window regulator motor assembly (for front passenger door) 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

  • As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*

    Click here

    *: for LHD

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 DTC OUTPUT


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

      Result
      Result Proceed to
      DTC output from power window regulator master switch assembly A
      DTC output from power window regulator motor assembly (for driver door) B
      DTC output from power window regulator motor assembly (for front passenger door) C

    A

    REPLACE POWER WINDOW REGULATOR 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. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

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


      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
      Proceed to
      OK
      NG

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR) Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR))


    1. Disconnect the H6 power window regulator master switch assembly connector.

    2. Disconnect the H4 power window regulator motor assembly (for driver door) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H6-4 (UP) - Body ground Always 10 kΩ or higher
      H6-5 (DOWN) - Body ground Always 10 kΩ or higher
      H4-10 (UP) - Body ground Always 10 kΩ or higher
      H4-7 (DOWN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


    1. Replace the power window regulator master switch assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > D-Door Motor > Clear DTCs

    2. Check for DTCs.

      Click here


      Body Electrical > D-Door Motor > Trouble Codes
      OK
      DTC B2312 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR) Click here

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


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

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


      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
      Proceed to
      OK
      NG

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER DOOR) Click here

    NG

  8. 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
      Proceed to
      OK
      NG

    NG

    REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER DOOR))


    1. Disconnect the I5 power window regulator motor assembly (for front passenger door) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I8-5 (UP) - Body ground Always 10 kΩ or higher
      I8-4 (DOWN) - Body ground Always 10 kΩ or higher
      I8-8 (AUTO) - Body ground Always 10 kΩ or higher
      I5-10 (UP) - Body ground Always 10 kΩ or higher
      I5-7 (DOWN) - Body ground Always 10 kΩ or higher
      I5-4 (AUTO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR FRONT PASSENGER DOOR) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR