FRONT POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B2658

DTC Code DTC Name
B2658 Short in Sensor with Motor Power Supply Circuit

DESCRIPTION

This DTC is stored when a power seat motor operates (a position control sensor is being supplied with power) and the power supply voltage does not rise to the specified value.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2658 Short in Sensor with Motor Power Supply Circuit Problem with the voltage supplied to the position control sensor.

  • Front power seat switch LH*1 or RH*2

  • Front seat adjuster assembly LH*1 or RH*2 (slide motor, front vertical motor or rear lifter motor)

  • Front seatback frame sub-assembly LH*1 or RH*2 (reclining motor)

  • Harness or connector

WIRING DIAGRAM

Figure 1. for LHD

B006Q9OE03

Figure 2. for RHD

B006Q9OE02

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Driver Seat > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Driver Seat > Trouble Codes
      OK
      DTC B2658 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK FRONT POWER SEAT SWITCH (MOTOR CIRCUIT)


    1. Slide motor circuit:


      1. B006OBNC58
        *A for LHD
        *B for RHD
        *a

        Front view of wire harness connector

        (to Front Seat Adjuster Assembly)

        Disconnect the W14*1 or W1*2 front seat adjuster assembly LH*1 or RH*2 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
        W14-2 - W14-3 Slide switch on 4.8 to 5.1 V
        for RHD
        Tester Connection Switch Condition Specified Condition
        W1-2 - W1-3 Slide switch on 4.8 to 5.1 V

    2. Front vertical motor circuit:


      1. B006OBNC60
        *A for LHD
        *B for RHD
        *a

        Front view of wire harness connector

        (to Front Seat Adjuster Assembly)

        Disconnect the W15*1 or W2*2 front seat adjuster assembly LH*1 or RH*2 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
        W15-2 - W15-3 Front vertical switch on 4.8 to 5.1 V
        for RHD
        Tester Connection Switch Condition Specified Condition
        W2-2 - W2-3 Front vertical switch on 4.8 to 5.1 V

    3. Rear lifter motor circuit:


      1. B006OBNC61
        *A for LHD
        *B for RHD
        *a

        Front view of wire harness connector

        (to Front Seat Adjuster Assembly)

        Disconnect the W16*1 or W3*2 front seat adjuster assembly LH*1 or RH*2 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
        W16-2 - W16-3 Slide switch on 4.8 to 5.1 V
        for RHD
        Tester Connection Switch Condition Specified Condition
        W3-2 - W3-3 Slide switch on 4.8 to 5.1 V

    4. Reclining motor circuit:


      1. B006OBNC59
        *A for LHD
        *B for RHD
        *a

        Front view of wire harness connector

        (to Front Seatback Frame Sub-assembly)

        Disconnect the X7*1 or X1*2 front seatback frame sub-assembly LH*1 or RH*2 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
        X7-2 - X7-3 Reclining switch on 4.8 to 5.1 V
        for RHD
        Tester Connection Switch Condition Specified Condition
        X1-2 - X1-3 Reclining switch on 4.8 to 5.1 V
      Result
      Result Proceed to
      OK A
      NG (Slide motor circuit) B
      NG (Front vertical motor circuit) C
      NG (Rear lifter motor circuit) D
      NG (Reclining motor circuit) E

    B

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

    C

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

    D

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

    E

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

    A

  4. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Driver Seat > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  5. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Driver Seat > Trouble Codes
      OK
      DTC B2658 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

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


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W20*1 or W7*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the W14*1 or W1*2 front seat adjuster assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W20-5 (SSRS) - W14-2 Always Below 1 Ω
      W20-5 (SSRS) or W14-2 - Body ground Always 10 kΩ or higher
      W20-1 (SGND) - W14-3 Always Below 1 Ω
      W20-1 (SGND) or W14-3 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W7-5 (SSRS) - W1-2 Always Below 1 Ω
      W7-5 (SSRS) or W1-2 - Body ground Always 10 kΩ or higher
      W7-1 (SGND) - W1-3 Always Below 1 Ω
      W7-1 (SGND) or W1-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. REPLACE FRONT POWER SEAT SWITCH


    • *1: for LHD

    • *2: for RHD


    1. Replace the front power seat switch LH*1 or RH*2 with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  8. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Driver Seat > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  9. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Driver Seat > Trouble Codes
      OK
      DTC B2658 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT POWER SEAT SWITCH WAS DEFECTIVE)

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY Click here

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


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W20*1 or W7*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the W15*1 or W2*2 front seat adjuster assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W20-3 (SSFV) - W15-2 Always Below 1 Ω
      W20-3 (FVRS) or W15-2 - Body ground Always 10 kΩ or higher
      W20-1 (SGND) - W15-3 Always Below 1 Ω
      W20-1 (SGND) or W15-3 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W7-3 (SSFV) - W2-2 Always Below 1 Ω
      W7-3 (FVRS) or W2-2 - Body ground Always 10 kΩ or higher
      W7-1 (SGND) - W2-3 Always Below 1 Ω
      W7-1 (SGND) or W2-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 7 Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - REAR LIFTER MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W20*1 or W7*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the W16*1 or W3*2 front seat adjuster assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W20-4 (SSRL) - W16-2 Always Below 1 Ω
      W20-4 (SSRL) or W16-2 - Body ground Always 10 kΩ or higher
      W20-1 (SGND) - W16-3 Always Below 1 Ω
      W20-1 (SGND) or W16-3 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W7-4 (SSRL) - W3-2 Always Below 1 Ω
      W7-4 (SSRL) or W3-2 - Body ground Always 10 kΩ or higher
      W7-1 (SGND) - W3-3 Always Below 1 Ω
      W7-1 (SGND) or W3-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 7 Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W20*1 or W7*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the X7*1 or X1*2 front seatback frame sub-assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W20-11 (SSRR) - X7-2 Always Below 1 Ω
      W20-11 (SSRR) or X7-2 - Body ground Always 10 kΩ or higher
      W20-1 (SGND) - X7-3 Always Below 1 Ω
      W20-1 (SGND) or X7-3 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W7-11 (SSRR) - X1-2 Always Below 1 Ω
      W7-11 (SSRR) or X1-2 - Body ground Always 10 kΩ or higher
      W7-1 (SGND) - X1-3 Always Below 1 Ω
      W7-1 (SGND) or X1-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. REPLACE FRONT POWER SEAT SWITCH


    • *1: for LHD

    • *2: for RHD


    1. Replace the front power seat switch LH*1 or RH*2 with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  14. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Driver Seat > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  15. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Driver Seat > Trouble Codes
      OK
      DTC B2658 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT POWER SEAT SWITCH WAS DEFECTIVE)

    NG

    REPLACE FRONT SEATBACK FRAME SUB-ASSEMBLY Click here