FRONT POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B265D

DTC Code DTC Name
B265D Up / Down Lumbar Support Sensor Circuit

DESCRIPTION

When the front power seat switch (seat ECU) does not receive a sensor signal despite forward or backward movement of the seat by power seat motor operation, this DTC is stored.

DTC Code DTC Detection Condition Trouble Area
B265D The forward and backward lock detection position of the sensor is the same.

  • Front power seat switch LH

  • Lumbar support adjuster assembly

  • Harness or connector

WIRING DIAGRAM

A01GWMYE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. DTC output area check


      1. Using the intelligent tester, determine the area that output the DTC.

        OK
        DTC B265D is not output.

    NG

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (LUMBAR SLIDE) Click here

    OK

    USE SIMULATION METHOD TO CHECK

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (LUMBAR SLIDE)


    1. Select the Active Test, use the intelligent tester to generate a control command, and then check the power seat motor function Click here.

      Driver Seat
      Tester Display Test Part Control Range Diagnostic Note
      Lumbar Lift Lumbar lifting operation Up / OFF / Down -
      OK
      Motor operates normally.

    NG

    CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY (POWER SEAT MOTOR) Click here

    OK

  3. CHECK FRONT POWER SEAT SWITCH (POSITION CONTROL SENSOR)


    1. A01H01UE31

      for LHD:


      1. Disconnect the e117 motor connector.

    2. for RHD:


      1. Disconnect the e112 motor connector.

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      e117-2 (SMR) - e117-3 (GND) Lumbar switch ON 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e112-2 (SMR) - e112-3 (GND) Lumbar switch ON 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - POWER SEAT MOTOR) Click here

    OK

  4. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR)


    1. A01GWWXE41

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

      Standard voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      e117-2 (SMR) - Body ground Lumbar switch ON 4.5 to 4.8 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e112-2 (SMR) - Body ground Lumbar switch ON 4.5 to 4.8 V

    NG

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY Click here

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

  5. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - POWER SEAT MOTOR)


    1. A01GYZ9E70

      for LHD:


      1. Disconnect the e46 switch connector.

      2. Disconnect the e117 motor connector.

    2. for RHD:


      1. Disconnect the e79 switch connector.

      2. Disconnect the e112 motor connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e46-7 (SSLV) - e117-2 (SMR) Always Below 1 Ω
      e46-18 (SGND) - e117-3 (GND) Always Below 1 Ω
      e46-7 (SSLV) - Body ground Always 10 kΩ or higher
      e46-18 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e79-7 (SSLV) - e112-2 (SMR) Always Below 1 Ω
      e79-18 (SGND) - e112-3 (GND) Always Below 1 Ω
      e79-7 (SSLV) - Body ground Always 10 kΩ or higher
      e79-18 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

  6. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY (POWER SEAT MOTOR)


    1. Remove the lumbar support adjuster assembly LH Click here.

    2. Inspect the lumbar support adjuster assembly LH Click here.


    NG

    REPLACE LUMBAR SUPPORT ADJUSTER ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - POWER SEAT MOTOR)

    A01GYHIE05

    1. for LHD:


      1. Disconnect the e45 switch connector.

      2. Disconnect the e117 motor connector.

    2. for RHD:


      1. Disconnect the e78 switch connector.

      2. Disconnect the e112 motor connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e45-9 (LV+) - e117-5 (UP) Always Below 1 Ω
      e45-2 (LV-) - e117-6 (DOWN) Always Below 1 Ω
      e45-9 (LV+) - Body ground Always 10 kΩ or higher
      e45-2 (LV-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e78-9 (LV+) - e112-5 (UP) Always Below 1 Ω
      e78-2 (LV-) - e112-6 (DOWN) Always Below 1 Ω
      e78-9 (LV+) - Body ground Always 10 kΩ or higher
      e78-2 (LV-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here