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.

  • Position control ECU and switch assembly (driver seat)

  • Front seat adjuster assembly (driver seat)

  • Position control ECU and switch assembly (front passenger seat)

  • Front seat adjuster assembly (front passenger seat)

  • Wire harness or connector

WIRING DIAGRAM


  1. for Driver Seat

    B004E4AE01

  2. for Front Passenger Seat

    B004E4AE05

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


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

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Driver Seat > Trouble Codes
      Body Electrical > Passenger Seat > Trouble Codes
      OK
      DTC B2658 is not output.
      Result
      Result Proceed to
      DTC B2658 is not output A
      DTC B2658 output from "Driver Seat" B
      DTC B2658 output from "Front Passenger Seat" C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - SLIDE MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FRONT PASSE) Click here

    B

  3. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) - SLIDE MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT)))


    1. Disconnect the b5*1 or a5*2 position control ECU and switch assembly (driver seat) connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the b1*1 or a1*2 slide motor (front seat adjuster assembly (driver seat)) connector.


      • *1: for LHD

      • *2: for RHD

    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
      b5-5 (SSRS) or b1-2 (O/P) - Body ground Always 10 kΩ or higher
      b5-1 (SGND) - b1-3 (GND) Always Below 1 Ω
      b5-1 (SGND) or b1-3 (GND) - 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
      a5-5 (SSRS) or a1-2 (O/P) - Body ground Always 10 kΩ or higher
      a5-1 (SGND) - a1-3 (GND) Always Below 1 Ω
      a5-1 (SGND) or a1-3 (GND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) (SLIDE MOTOR CIRCUIT)


    1. Reconnect the b1*1 or a1*2 slide motor (front seat adjuster assembly (driver seat)) 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 Condition Specified Condition
      b1-2 (O/P) - b1-3 (GND) Sliding switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Condition Specified Condition
      a1-2 (O/P) - a1-3 (GND) Sliding switch on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) - LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT)))


    1. Disconnect the b5*1 or a5*2 position control ECU and switch assembly (driver seat) connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the b2*1 or a3*2 lifter motor (front seat adjuster assembly (driver seat)) connector.


      • *1: for LHD

      • *2: for RHD

    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) - b2-2 Always Below 1 Ω
      b5-4 (SSRL) or b2-2 - Body ground Always 10 kΩ or higher
      b5-1 (SGND) - b2-3 Always Below 1 Ω
      b5-1 (SGND) or b2-3 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      a5-4 (SSRL) - a3-2 Always Below 1 Ω
      a5-4 (SSRL) or a3-2 - Body ground Always 10 kΩ or higher
      a5-1 (SGND) - a3-3 Always Below 1 Ω
      a5-1 (SGND) or a3-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) (LIFTER MOTOR CIRCUIT)


    1. Reconnect the b2*1 or a3*2 lifter motor (front seat adjuster assembly (driver seat)) 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 Condition Specified Condition
      b2-2 - b2-3 Lifter switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Condition Specified Condition
      a3-2 - a3-3 Lifter switch on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT) Click here

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT) Click here

  7. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - SLIDE MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FRONT PASSE)


    1. Disconnect the a5*1 or b5*2 position control ECU and switch assembly (front passenger seat) connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the a1*1 or b1*2 slide motor (front seat adjuster assembly (front passenger seat)) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      a5-5 (SSRS) - a1-2 (O/P) Always Below 1 Ω
      a5-5 (SSRS) or a1-2 (O/P) - Body ground Always 10 kΩ or higher
      a5-1 (SGND) - a1-3 (GND) Always Below 1 Ω
      a5-1 (SGND) or a1-3 (GND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      b5-5 (SSRS) - b1-2 (O/P) Always Below 1 Ω
      b5-5 (SSRS) or b1-2 (O/P) - Body ground Always 10 kΩ or higher
      b5-1 (SGND) - b1-3 (GND) Always Below 1 Ω
      b5-1 (SGND) or b1-3 (GND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) (SLIDE MOTOR CIRCUIT)


    1. Reconnect the a1*1 or b1*2 slide motor (front seat adjuster assembly (front passenger seat)) 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 Condition Specified Condition
      a1-2 (O/P) - a1-3 (GND) Sliding switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Condition Specified Condition
      b1-2 (O/P) - b1-3 (GND) Sliding switch on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FRONT PASS)


    1. Disconnect the a5*1 or b5*2 position control ECU and switch assembly (front passenger seat) connector.


      • *1: for LHD

      • *2: for RHD

    2. Disconnect the a3*1 or b2*2 lifter motor (front seat adjuster assembly (front passenger seat)) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      a5-4 (SSRL) - a3-2 Always Below 1 Ω
      a5-4 (SSRL) or a3-2 - Body ground Always 10 kΩ or higher
      a5-1 (SGND) - a3-3 Always Below 1 Ω
      a5-1 (SGND) or a3-3 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      b5-4 (SSRL) - b2-2 Always Below 1 Ω
      b5-4 (SSRL) or b2-2 - Body ground Always 10 kΩ or higher
      b5-1 (SGND) - b2-3 Always Below 1 Ω
      b5-1 (SGND) or b2-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) (LIFTER MOTOR CIRCUIT)


    1. Reconnect the a3*1 or b2*2 lifter motor (front seat adjuster assembly (front passenger seat)) 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 Condition Specified Condition
      a3-2 - a3-3 Lifter switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Condition Specified Condition
      b2-2 - b2-3 Lifter switch on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY (FRONT PASSENGER SEAT) Click here

    NG

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) Click here