FRONT POWER SEAT CONTROL SYSTEM(w/ Memory), Diagnostic DTC:B2651

DTC Code DTC Name
B2651 Reclining Sensor Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
B2651 The forward and backward lock detection position of the sensor is the same.

  • for Driver


    • Front power seat switch LH


    • Reclining motor (front seatback frame sub-assembly LH)


    • Wire harness or connector


  • for Front Passenger


    • Front power seat switch RH


    • Reclining motor (separate type front seatback spring assembly)


    • Wire harness or connector

WIRING DIAGRAM


  1. for Driver

    A0008ZRE25
    *a Reclining Motor
    *b Front Seatback Frame Sub-assembly LH
    *c Front Power Seat Switch LH

  2. for Front Passenger

    A0007LTE18
    *a Reclining Motor
    *b Separate Type Front Seatback Spring Assembly
    *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 (RECLINING MOTOR) Click here

    B

  2. PERFORM ACTIVE TEST USING GTS (RECLINING 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 Ranger Diagnostic Note
      Seat Reclining Seat reclining operation OFF/Front/Rear -
      OK
      Motor operates normally.

    NG

    INSPECT RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH) Click here

    OK

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


    1. Disconnect the Z2 reclining motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Z2-2 - Z2-3 Reclining switch on 4.8 to 5.1 V

    NG

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

    OK

  4. CHECK RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)


    1. A0004X3E02
      Text in Illustration
      *a

      Component with harness connected

      (Reclining Motor (Front Seatback Frame Sub-assembly LH))

      Reconnect the Z2 reclining motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Z2-2 - Body ground Reclining switch on 4.5 to 4.8 V

    OK

    REPLACE FRONT POWER SEAT SWITCH LH Click here

    NG

    REPLACE RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH) Click here

  5. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - RECLINING 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
      X10-11 (SSRR) - Z2-2 Always Below 1 Ω
      X10-1 (SGND) - Z2-3 Always Below 1 Ω
      X10-11 (SSRR) - 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 RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH)


    1. A0007P8E14
      Text in Illustration
      *a

      Component without harness connected

      (Reclining Motor (Front Seatback Frame Sub-assembly LH))

      Disconnect the Z2 reclining motor connector.

    2. Check if the seatback moves smoothly when the auxiliary battery is connected to the reclining motor connector terminals.

      OK
      Condition Operational Direction

      Auxiliary battery positive (+) → Terminal 4

      Auxiliary battery negative (-) → Terminal 1

      		 Seatback moves forward

      Auxiliary battery positive (+) → Terminal 1

      Auxiliary battery negative (-) → Terminal 4

      		 Seatback moves backward

    NG

    REPLACE RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY LH) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - RECLINING 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
      X9-9 (RCL+) - Z2-4 Always Below 1 Ω
      X9-11 (RCL-) - Z2-1 Always Below 1 Ω
      X9-9 (RCL+) - Body ground Always 10 kΩ or higher
      X9-11 (RCL-) - 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 (RECLINING 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 Ranger Diagnostic Note
      Seat Reclining Seat reclining operation OFF/Front/Rear -
      OK
      Motor operates normally.

    NG

    INSPECT RECLINING MOTOR (SEPARATE TYPE FRONT SEATBACK SPRING ASSEMBLY) Click here

    OK

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


    1. Disconnect the Y2 reclining motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Y2-2 - Y2-3 Reclining switch on 4.8 to 5.1 V

    NG

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

    OK

  10. CHECK RECLINING MOTOR (SEPARATE TYPE FRONT SEATBACK SPRING ASSEMBLY)


    1. A0008THE03
      Text in Illustration
      *a

      Component with harness connected

      (Reclining Motor (Separate Type Front Seatback Spring Assembly))

      Reconnect the Y2 reclining motor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Y2-2 - Body ground Reclining switch on 4.5 to 4.8 V

    OK

    REPLACE FRONT POWER SEAT SWITCH RH Click here

    NG

    REPLACE RECLINING MOTOR (SEPARATE TYPE FRONT SEATBACK SPRING ASSEMBLY) Click here

  11. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - RECLINING 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
      W10-11 (SSRR) - Y2-2 Always Below 1 Ω
      W10-1 (SGND) - Y2-3 Always Below 1 Ω
      W10-11 (SSRR) - 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 RECLINING MOTOR (SEPARATE TYPE FRONT SEATBACK SPRING ASSEMBLY)


    1. A0007P8E14
      Text in Illustration
      *a

      Component without harness connected

      (Reclining Motor (Separate Type Front Seatback Spring Assembly))

      Disconnect the Y2 reclining motor connector.

    2. Check if the seatback moves smoothly when the auxiliary battery is connected to the reclining motor connector terminals.

      OK
      Condition Operational Direction

      Auxiliary battery positive (+) → Terminal 4

      Auxiliary battery negative (-) → Terminal 1

      		 Seatback moves forward

      Auxiliary battery positive (+) → Terminal 1

      Auxiliary battery negative (-) → Terminal 4

      		 Seatback moves backward

    NG

    REPLACE RECLINING MOTOR (SEPARATE TYPE FRONT SEATBACK SPRING ASSEMBLY) Click here

    OK

  13. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - RECLINING 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
      W9-9 (RCL+) - Y2-4 Always Below 1 Ω
      W9-11 (RCL-) - Y2-1 Always Below 1 Ω
      W9-9 (RCL+) - Body ground Always 10 kΩ or higher
      W9-11 (RCL-) - Body ground Always 10 kΩ or higher

    OK

    REPLACE FRONT POWER SEAT SWITCH RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR