FRONT POWER SEAT CONTROL SYSTEM (w/ Memory), 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 Code DTC Detection Condition Trouble Area
B2658 A problem with the voltage supplied to the position control sensor.

  • Front power seat switch

  • Separate type front seat cushion spring assembly

  • Separate type front seatback assembly

  • Harness or connector

WIRING DIAGRAM

A009565E01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B2658 is not output.

    NG

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

    OK

    USE SIMULATION METHOD TO CHECK Click here

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


    • *1: for LHD

    • *2: for RHD


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

    2. Disconnect the b1*1 or a1*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
      b5-5 (SSRS) - b1-2 (O/P) Always Below 1 Ω
      b5-1 (SGND) - b1-3 (GND) Always Below 1 Ω
      b5-5 (SSRS) - b5-1 (SGND) Always 10 kΩ or higher
      b5-5 (SSRS) - Body ground Always 10 kΩ or higher
      b5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      a5-5 (SSRS) - a1-2 (O/P) Always Below 1 Ω
      a5-1 (SGND) - a1-3 (GND) Always Below 1 Ω
      a5-5 (SSRS) - a5-1 (SGND) Always 10 kΩ or higher
      a5-5 (SSRS) - 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

  3. CHECK FRONT POWER SEAT SWITCH (SLIDE MOTOR CIRCUIT)


    1. A009AC5E01
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Separate Type Front Seat Cushion Spring Assembly [Slide Motor])

      Disconnect the b1*1 or a1*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
      b1-2 (O/P) - b1-3 (GND) Sliding switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      a1-2 (O/P) - a1-3 (GND) Sliding switch on 4.8 to 5.1 V

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

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


    • *1: for LHD

    • *2: for RHD


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

    2. Disconnect the b2*1 or a2*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
      b5-3 (SSFV) - b2-2 (O/P) Always Below 1 Ω
      b5-1 (SGND) - b2-3 (GND) Always Below 1 Ω
      b5-3 (SSFV) - b5-1 (SGND) Always 10 kΩ or higher
      b5-3 (SSFV) - Body ground Always 10 kΩ or higher
      b5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      a5-3 (SSFV) - a2-2 (O/P) Always Below 1 Ω
      a5-1 (SGND) - a2-3 (GND) Always Below 1 Ω
      a5-3 (SSFV) - a5-1 (SGND) Always 10 kΩ or higher
      a5-3 (SSFV) - 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

  5. CHECK FRONT POWER SEAT SWITCH (FRONT VERTICAL MOTOR CIRCUIT)


    1. A009AC5E03
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Separate Type Front Seat Cushion Spring Assembly [Front Vertical Motor])

      Disconnect the b2*1 or a2*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
      b2-2 (O/P) - b2-3 (GND) Front vertical switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      a2-2 (O/P) - a2-3 (GND) Front vertical switch on 4.8 to 5.1 V

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

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


    • *1: for LHD

    • *2: for RHD


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

    2. Disconnect the b3*1 or a3*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
      b5-4 (SSRL) - b3-2 (O/P) Always Below 1 Ω
      b5-1 (SGND) - b3-3 (GND) Always Below 1 Ω
      b5-4 (SSRL) - b5-1 (SGND) Always 10 kΩ or higher
      b5-4 (SSRL) - Body ground Always 10 kΩ or higher
      b5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      a5-4 (SSRL) - a3-2 (O/P) Always Below 1 Ω
      a5-1 (SGND) - a3-3 (GND) Always Below 1 Ω
      a5-4 (SSRL) - a5-1 (SGND) Always 10 kΩ or higher
      a5-4 (SSRL) - 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

  7. CHECK FRONT POWER SEAT SWITCH (LIFTER MOTOR CIRCUIT)


    1. A009AC5E04
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Separate Type Front Seat Cushion Spring Assembly [Lifter Motor])

      Disconnect the b3*1 or a3*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
      b3-2 (O/P) - b3-3 (GND) Lifter switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      a3-2 (O/P) - a3-3 (GND) Lifter switch on 4.8 to 5.1 V

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  8. CHECK SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY


    1. Temporarily replace the separate type front seat cushion springs one at a time with a new or normally functioning one Click here.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      OK
      DTC B2658 is not output.

    NG

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

    OK

    END (REPLACE SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY)

  9. 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) - b5-1 (SGND) Always 10 kΩ or higher
      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) - a5-1 (SGND) Always 10 kΩ or higher
      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

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


    1. A009AC5E02
      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

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

  11. CHECK SEPARATE TYPE FRONT SEATBACK ASSEMBLY


    1. Temporarily replace the separate type front seatbacks one at a time with a new or normally functioning one Click here.

    2. Clear the DTCs Click here.

    3. Check for DTCs Click here.

      OK
      DTC B2658 is not output.

    NG

    REPLACE FRONT POWER SEAT SWITCH Click here

    OK

    END (REPLACE SEPARATE TYPE FRONT SEATBACK ASSEMBLY)