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FRONT POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B2653

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DTC Code DTC Name
B2653 Lifter Sensor Malfunction
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DESCRIPTION

When the position control ECU and switch assembly (driver seat) or position control ECU and switch assembly (front passenger seat) does not receive a sensor signal despite upward or downward movement of the seat cushion by power seat motor operation, this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2653 Lifter Sensor Malfunction The upward and downward lock detection position of the sensor is the same.

  • Position control ECU and switch assembly (driver seat)

  • Lifter motor (Front seat adjuster assembly (driver seat))

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

  • Lifter motor (Front seat adjuster assembly (front passenger seat))

  • Wire harness or connector
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WIRING DIAGRAM


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  1. B0066GTE07

    for Driver Seat

  2. B0066GTE08

    for Front Passenger Seat

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PROCEDURE


  1. Click here

    CLEAR DTC


    1. Clear the DTCs.

      Click here


      1. Body Electrical > Driver Seat > Clear DTCs



      1. Body Electrical > Passenger Seat > Clear DTCs


      Result
      Proceed to
      NEXT

  2. Click here

    CHECK FOR DTC


    1. Check for DTCs.

      Click here


      1. Body Electrical > Driver Seat > Trouble Codes



      1. Body Electrical > Passenger Seat > Trouble Codes


      OK
      DTC B2653 is not output.
      Result
      Result Proceed to
      DTC B2653 is not output A
      DTC B2653 output from "Driver Seat" B
      DTC B2653 output from "Front Passenger Seat" C

  3. Click here

    PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      1. Body Electrical > Driver Seat > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Lifter Operation Seat lifter operation OFF/Rear/Front -



      1. Body Electrical > Driver Seat > Active Test
        Tester Display
        Lifter Operation




      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

  4. Click here

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


    1. Disconnect 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
      Table 1. for LHD
      Tester Connection Condition Specified Condition
      b2-2 - b2-3 Lifter switch on 4.8 to 5.1 V
      Table 2. 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

  5. Click here

    CHECK LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT))


    1. B0066ENC09
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Lifter Motor (Front Seat Adjuster Assembly (Driver Seat))

      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
      Table 3. for LHD
      Tester Connection Condition Specified Condition
      b2-2 - Body ground Lifter motor operating 4.5 to 4.8 V
      Table 4. for RHD
      Tester Connection Condition Specified Condition
      a3-2 - Body ground Lifter motor operating 4.5 to 4.8 V
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPLACE SLIDE MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT))Click here

  6. Click here

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

      Standard Resistance
      Table 5. 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
      Table 6. 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

    • OK

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

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. Click here

    INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT))


    1. Remove the front seat adjuster assembly (driver seat).

      Click here

    2. Inspect the front seat adjuster assembly (driver seat) (lifter motor).

      Click here

      Result
      Proceed to
      OK
      NG

  8. Click here

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


    1. Disconnect the b4*1 or a4*2 position control ECU and switch assembly (driver seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 7. for LHD
      Tester Connection Condition Specified Condition
      b4-10 (LFT+) - b2-4 Always Below 1 Ω
      b4-10 (LFT+) or b2-4 - Body ground Always 10 kΩ or higher
      b4-12 (LFT-) - b2-1 Always Below 1 Ω
      b4-12 (LFT-) or b2-1 - Body ground Always 10 kΩ or higher
      Table 8. for RHD
      Tester Connection Condition Specified Condition
      a4-10 (LFT+) - a3-4 Always Below 1 Ω
      a4-10 (LFT+) or a3-4 - Body ground Always 10 kΩ or higher
      a4-12 (LFT-) - a3-1 Always Below 1 Ω
      a4-12 (LFT-) or a3-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Passenger Seat / Active Test.

    5. Perform the Active Test according to the display on the GTS.


      1. Body Electrical > Passenger Seat > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Lifter Operation Seat lifter operation OFF/Rear/Front -



      1. Body Electrical > Passenger Seat > Active Test
        Tester Display
        Lifter Operation




      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

  10. Click here

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


    1. Disconnect 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
      Table 9. for LHD
      Tester Connection Condition Specified Condition
      a3-2 - a3-3 Lifter switch on 4.8 to 5.1 V
      Table 10. 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

  11. Click here

    CHECK LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FRONT PASSENGER SEAT))


    1. B0066ENC10
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Lifter Motor (Front Seat Adjuster Assembly (Front Passenger Seat))

      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
      Table 11. for LHD
      Tester Connection Condition Specified Condition
      a3-2 - Body ground Lifter motor operating 4.5 to 4.8 V
      Table 12. for RHD
      Tester Connection Condition Specified Condition
      b2-2 - Body ground Lifter motor operating 4.5 to 4.8 V
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

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

  12. Click here

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


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

      Standard Resistance
      Table 13. 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
      Table 14. 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 (GND) Always Below 1 Ω
      b5-1 (SGND) or b2-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. Click here

    INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (FRONT PASSENGER SEAT))


    1. Remove the front seat adjuster assembly (front passenger seat).

      Click here

    2. Inspect the front seat adjuster assembly (front passenger seat) (lifter motor).

      Click here

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

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

  14. Click here

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


    1. Disconnect the a4*1 or b4*2 position control ECU and switch assembly (front passenger seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 15. for LHD
      Tester Connection Condition Specified Condition
      a4-10 (LFT+) - a3-4 Always Below 1 Ω
      a4-10 (LFT+) or a3-4 - Body ground Always 10 kΩ or higher
      a4-12 (LFT-) - a3-1 Always Below 1 Ω
      a4-12 (LFT-) or a3-1 - Body ground Always 10 kΩ or higher
      Table 16. for RHD
      Tester Connection Condition Specified Condition
      b4-10 (LFT+) - b2-4 Always Below 1 Ω
      b4-10 (LFT+) or b2-4 - Body ground Always 10 kΩ or higher
      b4-12 (LFT-) - b2-1 Always Below 1 Ω
      b4-12 (LFT-) or b2-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

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

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR