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

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DTC Code DTC Name
B2651 Reclining Sensor Malfunction
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DESCRIPTION

When the front power seat switch (for driver) or front power seat switch (for front passenger) 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 (for driver)


    • Reclining motor (front seatback frame sub-assembly (for driver))


    • Wire harness or connector


  • for Front Passenger


    • Front power seat switch (for front passenger)


    • Reclining motor (separate type front seatback spring assembly)


    • Wire harness or connector
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WIRING DIAGRAM


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  1. A00040NE29

    for Driver

  2. A00040NE30

    for Front Passenger

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PROCEDURE


  1. Click here

    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

  2. Click here

    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.

      Table 1. Driver Seat
      Tester Display Test Part Control Ranger Diagnostic Note
      Seat Reclining Seat reclining operation OFF/Front/Rear -
      OK
      Motor operates normally.

  3. Click here

    CHECK FRONT POWER SEAT SWITCH (FOR DRIVER) (RECLINING MOTOR CIRCUIT)


    1. Disconnect the Z2*1or Y2*2 reclining motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      Table 2. for LHD
      Tester Connection Condition Specified Condition
      Z2-2 - Z2-3 Reclining switch on 4.8 to 5.1 V
      Table 3. for RHD
      Tester Connection Condition Specified Condition
      Y2-2 - Y2-3 Reclining switch on 4.8 to 5.1 V

  4. Click here

    CHECK RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY (FOR DRIVER))


    1. A0004ZOE02

      Reconnect the Z2*1 or Y2*2 reclining motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      Table 4. for LHD
      Tester Connection Condition Specified Condition
      Z2-2 - Body ground Reclining switch on 4.5 to 4.8 V
      Table 5. for RHD
      Tester Connection Condition Specified Condition
      Y2-2 - Body ground Reclining switch on 4.5 to 4.8 V
      Table 6. Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Reclining Motor (Front Seatback Frame Sub-assembly (for Driver))

    • OK

      REPLACE FRONT POWER SEAT SWITCH (FOR DRIVER) (Click here)

    • NG

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

  5. Click here

    CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR DRIVER) - RECLINING MOTOR)


    1. Disconnect the X10*1 or W10*2 front power seat switch (for driver) 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
      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
      Table 8. for RHD
      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 (FOR DRIVER) (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

    INSPECT RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY (FOR DRIVER))


    1. A0007P8E14

      Disconnect the Z2*1 or Y2*2 reclining motor connector.


      • *1: for LHD

      • *2: for RHD

    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
      Table 9. Text in Illustration
      *a

      Component without harness connected

      (Reclining Motor (Front Seatback Frame Sub-assembly (for Driver))

    • OKClick here
    • NG

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

  7. Click here

    CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR DRIVER) - RECLINING MOTOR)


    1. Disconnect the X9*1 or W9*2 front power seat switch (for driver) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 10. for LHD
      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
      Table 11. for RHD
      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 (FOR DRIVER) (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

    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.

      Table 12. Passenger Seat
      Tester Display Test Part Control Ranger Diagnostic Note
      Seat Reclining Seat reclining operation OFF/Front/Rear -
      OK
      Motor operates normally.

  9. Click here

    CHECK FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) (RECLINING MOTOR CIRCUIT)


    1. Disconnect the Y2*1 or Z2*2 reclining motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      Table 13. for LHD
      Tester Connection Condition Specified Condition
      Y2-2 - Y2-3 Reclining switch on 4.8 to 5.1 V
      Table 14. for RHD
      Tester Connection Condition Specified Condition
      Z2-2 - Z2-3 Reclining switch on 4.8 to 5.1 V

  10. Click here

    CHECK RECLINING MOTOR (SEPARATE TYPE FRONT SEATBACK SPRING ASSEMBLY)


    1. A0003IBE02

      Reconnect the Y2*1 or Z2*2 reclining motor connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      Table 15. for LHD
      Tester Connection Condition Specified Condition
      Y2-2 - Body ground Reclining switch on 4.5 to 4.8 V
      Table 16. for RHD
      Tester Connection Condition Specified Condition
      Z2-2 - Body ground Reclining switch on 4.5 to 4.8 V
      Table 17. Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

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

    • OK

      REPLACE FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) (Click here)

    • NG

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

  11. Click here

    CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) - RECLINING MOTOR)


    1. Disconnect the W10*1 or X10*2 front power seat switch (for front passenger) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 18. for LHD
      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
      Table 19. for RHD
      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 (FOR FRONT PASSENGER) (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. Click here

    INSPECT RECLINING MOTOR (SEPARATE TYPE FRONT SEATBACK SPRING ASSEMBLY)


    1. A0007P8E14

      Disconnect the Y2*1 or Z2*2 reclining motor connector.


      • *1: for LHD

      • *2: for RHD

    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
      Table 20. Text in Illustration
      *a

      Component without harness connected

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

    • OKClick here
    • NG

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

  13. Click here

    CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (FOR FRONT PASSENGER) - RECLINING MOTOR)


    1. Disconnect the W9*1 or X9*2 front power seat switch (for front passenger) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 21. for LHD
      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
      Table 22. for RHD
      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 (FOR FRONT PASSENGER) (Click here)

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR