FRONT POWER SEAT CONTROL SYSTEM(w/ Memory), Diagnostic DTC:B2652

DTC Code DTC Name
B2652 Front Vertical 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 front of the seat cushion by power seat motor operation, this DTC is stored.

DTC Code DTC Detection Condition Trouble Area
B2652 The upward and downward lock detection position of the sensor the same.

  • for Driver


    • Front power seat switch LH


    • Front vertical motor (front seat adjuster assembly LH)


    • Wire harness or connector


  • for Front Passenger


    • Front power seat switch RH


    • Front vertical motor (front seat adjuster assembly RH)


    • Wire harness or connector

WIRING DIAGRAM


  1. for Driver

    A0007LTE19
    *a Front Vertical Motor
    *b Front Seat Adjuster Assembly LH
    *c Front Power Seat Switch LH

  2. for Front Passenger

    A0007LTE20
    *a Front Vertical 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 (FRONT VERTICAL MOTOR) Click here

    B

  2. PERFORM ACTIVE TEST USING GTS (FRONT VERTICAL 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
      Front Vertical Operation Seat front vertical operation OFF/Up/Down -
      OK
      Motor operates normally.

    NG

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

    OK

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


    1. Disconnect the X2 front vertical motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      X2-2 - X2-3 Front vertical switch on 4.8 to 5.1 V

    NG

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

    OK

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


    1. A0004R8E02
      Text in Illustration
      *a

      Component with harness connected

      (Front Vertical Motor (Front Seat Adjuster Assembly LH))

      Reconnect the X2 front vertical motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      X2-2 - Body ground Front vertical switch on 4.5 to 4.8 V

    OK

    REPLACE FRONT POWER SEAT SWITCH LH Click here

    NG

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

  5. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - FRONT VERTICAL 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
      X10-3 (SSFV) - X2-2 Always Below 1 Ω
      X10-1 (SGND) - X2-3 Always Below 1 Ω
      X10-3 (SSFV) - 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 FRONT VERTICAL MOTOR (FRONT SEAT ADJUSTER ASSEMBLY LH)


    1. A0007P8E14
      Text in Illustration
      *a

      Component without harness connected

      (Front Vertical Motor (Front Seat Adjuster Assembly LH))

      Disconnect the X2 front vertical motor connector.

    2. Check if the seat cushion moves smoothly when the auxiliary battery is connected to the front vertical 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 FRONT VERTICAL MOTOR (FRONT SEAT ADJUSTER ASSEMBLY LH) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - FRONT VERTICAL 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
      X9-8 (FRV+) - X2-1 Always Below 1 Ω
      X9-5 (FRV-) - X2-4 Always Below 1 Ω
      X9-8 (FRV+) - Body ground Always 10 kΩ or higher
      X9-5 (FRV-) - 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 (FRONT VERTICAL 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
      Front Vertical Operation Seat front vertical operation OFF/Up/Down -
      OK
      Motor operates normally.

    NG

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

    OK

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


    1. Disconnect the W2 front vertical motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      W2-2 - W2-3 Front vertical switch on 4.8 to 5.1 V

    NG

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

    OK

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


    1. A0008BJE03
      Text in Illustration
      *a

      Component with harness connected

      (Front Vertical Motor (Front Seat Adjuster Assembly RH))

      Reconnect the W2 front vertical motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      W2-2 - Body ground Front vertical switch on 4.5 to 4.8 V

    OK

    REPLACE FRONT POWER SEAT SWITCH RH Click here

    NG

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

  11. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - FRONT VERTICAL 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
      W10-3 (SSFV) - W2-2 Always Below 1 Ω
      W10-1 (SGND) - W2-3 Always Below 1 Ω
      W10-3 (SSFV) - 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 FRONT VERTICAL MOTOR (FRONT SEAT ADJUSTER ASSEMBLY RH)


    1. A0007P8E14
      Text in Illustration
      *a

      Component without harness connected

      (Front Vertical Motor (Front Seat Adjuster Assembly RH))

      Disconnect the W2 front vertical motor connector.

    2. Check if the seat cushion moves smoothly when the auxiliary battery is connected to the front vertical 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 FRONT VERTICAL MOTOR (FRONT SEAT ADJUSTER ASSEMBLY RH) Click here

    OK

  13. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - FRONT VERTICAL 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
      W9-8 (FRV+) - W2-1 Always Below 1 Ω
      W9-5 (FRV-) - W2-4 Always Below 1 Ω
      W9-8 (FRV+) - Body ground Always 10 kΩ or higher
      W9-5 (FRV-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT POWER SEAT SWITCH RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR