POWER WINDOW CONTROL SYSTEM, Diagnostic DTC:B2312

DTC Code DTC Name
B2312 Driver Side Door Master Switch Malfunction

DESCRIPTION

The portion of the power window control system that is located in the driver door consists of a power window master switch, regulator, and a motor with an integrated ECU. The driver door power window regulator motor is controlled by the ECU when the power window master switch is operated (models with jam protection).

When the ECU determines that the power window master switch is stuck, DTC B2312 is set.

Note

The power window control system uses a serial communication protocol (LIN) to communicate with the main body ECU. 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.

DTC Code DTC Detection Condition Trouble Area
B2312 The power window regulator master switch is stuck

  • Power window regulator motor (on driver side)

  • Power window master switch

  • Wire harness

  • Power window master switch is held in the same position for more than 20 seconds

WIRING DIAGRAM

A017E0CE04
A017E0CE05

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Turn the ignition switch off.

    2. Wait for at least 10 seconds, and then turn the ignition switch on (IG).

    3. Check whether the DTC output recurs.

      Result
      Result Proceed to
      B2312 A
      No output B

    B

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

    A

  2. INSPECT POWER WINDOW MASTER SWITCH


    1. A017DODE14

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      8 (U) - 1 (E) - 4 (A) Auto UP Below 1 Ω
      8 (U) - 1 (E) Manual UP Below 1 Ω
      5 (D) - 1 (E) Manual DOWN Below 1 Ω
      4 (A) - 5 (D) - 1 (E) Auto DOWN Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      1 (U) - 9 (E) - 4 (A) Auto UP Below 1 Ω
      1 (U) - 9 (E) Manual UP Below 1 Ω
      5 (D) - 9 (E) Manual DOWN Below 1 Ω
      4 (A) - 5 (D) - 9 (E) Auto DOWN Below 1 Ω

    NG

    REPLACE POWER WINDOW MASTER SWITCH Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER WINDOW MASTER SWITCH - WINDOW REGULATOR MOTOR)


    1. for LHD:


      1. Disconnect the M1 and H1 connectors.

        A017B6DE09

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

        Standard resistance
        Tester Connection Condition Specified Condition
        M1-8 (U) - H1-10 (UP1) Always Below 1 Ω
        M1-3 (LED) - H1-5 (LED) Always Below 1 Ω
        M1-4 (A) - H1-4 (AUTO) Always Below 1 Ω
        M1-5 (D) - H1-7 (DWN1) Always Below 1 Ω
        M1-8 (U) - Body ground Always 10 kΩ or higher
        M1-3 (LED) - Body ground Always 10 kΩ or higher
        M1-4 (A) - Body ground Always 10 kΩ or higher
        M1-5 (D) - Body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the L1 and G10 connectors.

        A017B6DE10

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

        Standard resistance
        Tester Connection Condition Specified Condition
        L1-1 (U) - G10-10 (UP1) Always Below 1 Ω
        L1-3 (LED) - G10-5 (LED) Always Below 1 Ω
        L1-4 (A) - G10-4 (AUTO) Always Below 1 Ω
        L1-5 (D) - G10-7 (DWN1) Always Below 1 Ω
        L1-1 (U) - Body ground Always 10 kΩ or higher
        L1-3 (LED) - Body ground Always 10 kΩ or higher
        L1-4 (A) - Body ground Always 10 kΩ or higher
        L1-5 (D) - 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