FRONT POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B2655

DTC Code DTC Name
B2655 Cushion Length Sensor Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
B2655 Sensor's forward and backward lock detection position is the same

  • Front power seat switch

  • Front seat adjuster assembly

  • Harness or connector

WIRING DIAGRAM

A01H26TE15

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (POWER SEAT MOTOR FUNCTION)


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

      Driver Seat
      Tester Display Test Part Control Range Diagnostic Note
      Cushion Length Seat cushion length operation Front / OFF / Rear -
      OK
      Motor operates normally.

    NG

    INSPECT FRONT SEAT ADJUSTER ASSEMBLY (POWER SEAT MOTOR) Click here

    OK

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

    A01GYZ9E20

    1. for LHD:


      1. Disconnect the e46 switch connector.

      2. Disconnect the e102 motor connector.

    2. for RHD:


      1. Disconnect the e79 switch connector.

      2. Disconnect the e99 motor connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e46-8 (PVCC) - e102-5 (VCC) Always Below 1 Ω
      e46-20 (SSRC) - e102-2 (O/P) Always Below 1 Ω
      e46-18 (SGND) - e102-6 (GND) Always Below 1 Ω
      e46-8 (PVCC) - Body ground Always 10 kΩ or higher
      e46-20 (SSRC) - Body ground Always 10 kΩ or higher
      e46-18 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      e79-8 (PVCC) - e99-5 (VCC) Always Below 1 Ω
      e79-20 (SSRC) - e99-2 (O/P) Always Below 1 Ω
      e79-18 (SGND) - e99-6 (GND) Always Below 1 Ω
      e79-8 (PVCC) - Body ground Always 10 kΩ or higher
      e79-20 (SSRC) - 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

  3. CHECK FRONT SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR)

    A01H01UE15

    1. for LHD:

      Disconnect the e102 motor connector.

    2. for RHD:

      Disconnect the e99 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
      e102-5 (VCC) - e102-6 (GND) Cushion switch ON 7.2 to 8.8 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e99-5 (VCC) - e99-6 (GND) Cushion switch ON 7.2 to 8.8 V

    NG

    REPLACE FRONT POWER SEAT SWITCH (for Driver Side) Click here

    OK

  4. CHECK FRONT SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR)

    A01GWWXE15

    1. for LHD:

      Reconnect the e102 motor connector.

    2. for RHD:

      Reconnect the e99 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
      e102-2 (O/P) - Body ground Cushion switch ON 0 to 8 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e99-2 (O/P) - Body ground Cushion switch ON 0 to 8 V

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY (for Driver Side) Click here

    OK

  5. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Recheck for DTC.

      OK
      DTC B2655 is not output.

    NG

    REPLACE FRONT POWER SEAT SWITCH (for Driver Side) Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  6. INSPECT FRONT SEAT ADJUSTER ASSEMBLY (POWER SEAT MOTOR)


    1. A01H230E04

      Check operation of the power seat motor (cushion motor).


      1. Check if the seat adjuster moves smoothly when the battery is connected to the cushion motor connector terminals.

        OK
        for LHD
        Measurement Condition Operational Direction

        Battery positive (+) → 3

        Battery negative (-) → 4

        		 Forward

        Battery positive (+) → 4

        Battery negative (-) → 3

        		 Backward
        for RHD
        Measurement Condition Operational Direction

        Battery positive (+) → 4

        Battery negative (-) → 3

        		 Forward

        Battery positive (+) → 3

        Battery negative (-) → 4

        		 Backward

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY (for Driver Side) Click here

    OK

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

    A01H09XE20

    1. for LHD:


      1. Disconnect the e45 and e46 switch connectors.

      2. Disconnect the e102 motor connector.

    2. for RHD:


      1. Disconnect the e78 and e79 switch connectors.

      2. Disconnect the e99 motor connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      e46-10 (C+) - e102-3 (FWD) Always Below 1 Ω
      e45-4 (C-) - e102-4 (BACK) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      e79-10 (C+) - e99-4 (FWD) Always Below 1 Ω
      e78-4 (C-) - e99-3 (BACK) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH (for Driver Side) Click here