FRONT POWER SEAT CONTROL SYSTEM (w/ Memory), Diagnostic DTC:B2651

DTC Code DTC Name
B2651 Reclining Sensor Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
B2651 The forward and backward lock detection position of the sensor is the same.

  • Front power seat switch

  • Separate type front seatback assembly (Reclining motor)

  • Harness or connector

WIRING DIAGRAM

A01DNL7E02

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 Click here.

      Driver Seat
      Tester Display Test Part Control Ranger Diagnostic Note
      Seat Reclining Seat reclining operation Front / OFF / Rear -
      OK
      Motor operates normally.

    NG

    INSPECT SEPARATE TYPE FRONT SEATBACK ASSEMBLY (RECLINING MOTOR) Click here

    OK

  2. CHECK FRONT POWER SEAT SWITCH (RECLINING MOTOR CIRCUIT)


    1. A01DR96E02
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Separate Type Front Seatback Assembly [Reclining Motor])

      Disconnect the f1*1 or e1*2 motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      f1-2 (O/P) - f1-3 (GND) Reclining switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e1-2 (O/P) - e1-3 (GND) Reclining switch on 4.8 to 5.1 V

    NG

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

    OK

  3. CHECK SEPARATE TYPE FRONT SEATBACK ASSEMBLY (RECLINING MOTOR)


    1. A01DNPVE02
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Separate Type Front Seatback Assembly [Reclining Motor])

      Connect the f1*1 or e1*2 motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      f1-2 (O/P) - Body ground Reclining switch on 4.5 to 4.8 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      e1-2 (O/P) - Body ground Reclining switch on 4.5 to 4.8 V

    NG

    REPLACE SEPARATE TYPE FRONT SEATBACK ASSEMBLY (RECLINING MOTOR) Click here

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

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


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the b5*1 or a5*2 switch connector.

    2. Disconnect the f1*1 or e1*2 motor connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      b5-11 (SSRR) - f1-2 (O/P) Always Below 1 Ω
      b5-1 (SGND) - f1-3 (GND) Always Below 1 Ω
      b5-11 (SSRR) - Body ground Always 10 kΩ or higher
      b5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      a5-11 (SSRR) - e1-2 (O/P) Always Below 1 Ω
      a5-1 (SGND) - e1-3 (GND) Always Below 1 Ω
      a5-11 (SSRR) - Body ground Always 10 kΩ or higher
      a5-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

  5. INSPECT SEPARATE TYPE FRONT SEATBACK ASSEMBLY (RECLINING MOTOR)


    1. A01DRJWE01

      Remove the separate type front seatback assembly (reclining motor) Click here.

    2. Check if the seatback moves smoothly when the battery is connected to the reclining motor connector terminals.

      OK
      Measurement Condition Operational Direction

      Battery positive (+) → 1 (FWD)

      Battery negative (-) → 4 (BACK)

      		 Seatback moves forward

      Battery positive (+) → 4 (BACK)

      Battery negative (-) → 1 (FWD)

      		 Seatback moves backward

    NG

    REPLACE SEPARATE TYPE FRONT SEATBACK ASSEMBLY (RECLINING MOTOR) Click here

    OK

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


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the b4*1 or a4*2 switch connector.

    2. Disconnect the f1*1 or e1*2 motor connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      b4-9 (RCL+) - f1-1 (FWD) Always Below 1 Ω
      b4-11 (RCL-) - f1-4 (BACK) Always Below 1 Ω
      b4-9 (RCL+) - Body ground Always 10 kΩ or higher
      b4-11 (RCL-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      a4-9 (RCL+) - e1-4 (FWD) Always Below 1 Ω
      a4-11 (RCL-) - e1-5 (BACK) Always Below 1 Ω
      a4-9 (RCL+) - Body ground Always 10 kΩ or higher
      a4-11 (RCL-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here