FRONT POWER SEAT CONTROL SYSTEM(w/ Memory), Diagnostic DTC:B2653

DTC Code DTC Name
B2653 Lifter Sensor Malfunction

DESCRIPTION

When the front power seat switch LH or front power seat switch RH do not receive a sensor signal despite upward or downward movement of the seat by power seat motor operation, this DTC is stored.

DTC Code DTC Detection Condition Trouble Area
B2653 The upward and downward lock detection position of the sensor is the same.

  • for Driver


    • Front power seat switch LH


    • Lifter motor (front seat adjuster assembly LH)


    • Wire harness or connector


  • for Front Passenger


    • Front power seat switch RH


    • Lifter motor (front seat adjuster assembly RH)


    • Wire harness or connector

WIRING DIAGRAM


  1. for Driver

    A0008ZRE22
    *a Lifter Motor
    *b Front Seat Adjuster Assembly LH
    *c Front Power Seat Switch LH

  2. for Front Passenger

    A0008ZRE23
    *a Lifter Motor
    *b Front Seat Adjuster Assembly RH
    *c Front Power Seat Switch RH

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC output from "Driver Seat" B
      DTC output from "Passenger Seat" C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR) Click here

    B

  2. PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power 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.

      Driver Seat
      Tester Display Test Part Control Range Diagnostic Note
      Lifter Operation Seat lifter operation OFF/Up/Down -
      OK
      Motor operates normally.

    NG

    INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY LH) Click here

    OK

  3. CHECK FRONT POWER SEAT SWITCH LH (LIFTER MOTOR CIRCUIT)


    1. Disconnect the X3 lifter motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      X3-2 - X3-3 Lifter switch on 4.8 to 5.1 V

    NG

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

    OK

  4. CHECK LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY LH)


    1. A0009R2E02
      Text in Illustration
      *a

      Component with harness connected

      (Lifter Motor (Front Seat Adjuster Assembly LH))

      Reconnect the X3 lifter motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      X3-2 - Body ground Lifter switch on 4.5 to 4.8 V

    OK

    REPLACE FRONT POWER SEAT SWITCH LH Click here

    NG

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

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


    1. Disconnect the X10 front power seat switch LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X10-4 (SSRL) - X3-2 Always Below 1 Ω
      X10-1 (SGND) - X3-3 Always Below 1 Ω
      X10-4 (SSRL) - Body ground Always 10 kΩ or higher
      X10-1 (SGND) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT POWER SEAT SWITCH LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY LH)


    1. A0007P8E14
      Text in Illustration
      *a

      Component without harness connected

      (Lifter Motor (Front Seat Adjuster Assembly LH))

      Disconnect the X3 lifter motor connector.

    2. Check if the seat cushion moves smoothly when the auxiliary battery is connected to the lifter motor connector terminals.

      OK
      Condition Operational Direction

      Auxiliary battery positive (+) → Terminal 4

      Auxiliary battery negative (-) → Terminal 1

      		 Seat cushion moves downward

      Auxiliary battery positive (+) → Terminal 1

      Auxiliary battery negative (-) → Terminal 4

      		 Seat cushion moves upward

    NG

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

    OK

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


    1. Disconnect the X9 front power seat switch LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X9-10 (LFT+) - X3-1 Always Below 1 Ω
      X9-12 (LFT-) - X3-4 Always Below 1 Ω
      X9-10 (LFT+) - Body ground Always 10 kΩ or higher
      X9-12 (LFT-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT POWER SEAT SWITCH LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. PERFORM ACTIVE TEST USING GTS (LIFTER MOTOR)


    1. Connect the GTS to the DLC3.

    2. Turn the power 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.

      Passenger Seat
      Tester Display Test Part Control Range Diagnostic Note
      Lifter Operation Seat lifter operation OFF/Up/Down -
      OK
      Motor operates normally.

    NG

    INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY RH) Click here

    OK

  9. CHECK FRONT POWER SEAT SWITCH RH (LIFTER MOTOR CIRCUIT)


    1. Disconnect the W3 lifter motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      W3-2 - W3-3 Lifter switch on 4.8 to 5.1 V

    NG

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

    OK

  10. CHECK LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY RH)


    1. A0004QZE03
      Text in Illustration
      *a

      Component with harness connected

      (Lifter Motor (Front Seat Adjuster Assembly RH))

      Reconnect the W3 lifter motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      W3-2 - Body ground Lifter switch on 4.5 to 4.8 V

    OK

    REPLACE FRONT POWER SEAT SWITCH RH Click here

    NG

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

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


    1. Disconnect the W10 front power seat switch RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W10-4 (SSRL) - W3-2 Always Below 1 Ω
      W10-1 (SGND) - W3-3 Always Below 1 Ω
      W10-4 (SSRL) - Body ground Always 10 kΩ or higher
      W10-1 (SGND) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT POWER SEAT SWITCH RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. INSPECT LIFTER MOTOR (FRONT SEAT ADJUSTER ASSEMBLY RH)


    1. A0007P8E14
      Text in Illustration
      *a

      Component without harness connected

      (Lifter Motor (Front Seat Adjuster Assembly RH))

      Disconnect the W3 lifter motor connector.

    2. Check if the seat cushion moves smoothly when the auxiliary battery is connected to the lifter motor connector terminals.

      OK
      Condition Operational Direction

      Auxiliary battery positive (+) → Terminal 4

      Auxiliary battery negative (-) → Terminal 1

      		 Seat cushion moves downward

      Auxiliary battery positive (+) → Terminal 1

      Auxiliary battery negative (-) → Terminal 4

      		 Seat cushion moves upward

    NG

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

    OK

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


    1. Disconnect the W9 front power seat switch RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      W9-10 (LFT+) - W3-1 Always Below 1 Ω
      W9-12 (LFT-) - W3-4 Always Below 1 Ω
      W9-10 (LFT+) - Body ground Always 10 kΩ or higher
      W9-12 (LFT-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT POWER SEAT SWITCH RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR