FRONT POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B2653

DTC Code DTC Name
B2653 Lifter Sensor Malfunction

DESCRIPTION


When the front power seat switch LH*1 or RH*2 does not receive a sensor signal despite forward or backward movement of the seat by power seat motor operation, this DTC is stored.

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

  • Front power seat switch LH*1 or RH*2

  • Front seat adjuster assembly LH*1 or RH*2 (rear lifter motor)

  • Harness or connector

WIRING DIAGRAM

Figure 1. for LHD

B006PD3E16
*a Rear Lifter Motor
*b Front Seat Adjuster Assembly LH
*c Front Power Seat Switch LH

Figure 2. for RHD

B006PD3E12
*a Rear Lifter Motor
*b Front Seat Adjuster Assembly RH
*c Front Power Seat Switch RH

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Driver Seat > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Driver Seat > Trouble Codes
      OK
      DTC B2653 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. PERFORM ACTIVE TEST USING GTS (LIFTER OPERATION)


    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.


      Body Electrical > Driver Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Lifter Operation Seat rear lifter operation OFF/Down/Up -

      Body Electrical > Driver Seat > Active Test
      Tester Display
      Lifter Operation
      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  4. CHECK FRONT POWER SEAT SWITCH (REAR LIFTER MOTOR CIRCUIT)


    1. B006OBNC61
      *A for LHD
      *B for RHD
      *a

      Front view of wire harness connector

      (to Front Seat Adjuster Assembly)

      Disconnect the W16*1 or W3*2 front seat adjuster assembly LH*1 or RH*2 connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      W16-2 - W16-3 Rear lifter switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      W3-2 - W3-3 Rear lifter switch on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  5. CHECK FRONT POWER SEAT SWITCH (REAR LIFTER MOTOR CIRCUIT)


    1. Check for pulse according to the value(s) in the table below.

      B006L8PC04
      *A for LHD *B for RHD
      *a

      Component with harness connected

      (Front Power Seat Switch)

      		 - -
      Standard
      for LHD
      Tester Connection Condition Specified Condition
      W20-4 (SSRL) - Body ground Rear lifter function operating Pulse generation
      for RHD
      Tester Connection Condition Specified Condition
      W7-4 (SSRL) - Body ground Rear lifter function operating Pulse generation
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY Click here

  6. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - REAR LIFTER MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W20*1 or W7*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the W16*1 or W3*2 front seat adjuster assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W20-4 (SSRL) - W16-2 Always Below 1 Ω
      W20-4 (SSRL) or W16-2 - Body ground Always 10 kΩ or higher
      W20-1 (SGND) - W16-3 Always Below 1 Ω
      W20-1 (SGND) or W16-3 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W7-4 (SSRL) - W3-2 Always Below 1 Ω
      W7-4 (SSRL) or W3-2 - Body ground Always 10 kΩ or higher
      W7-1 (SGND) - W3-3 Always Below 1 Ω
      W7-1 (SGND) or W3-3 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT FRONT SEAT ADJUSTER ASSEMBLY (REAR LIFTER MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Remove the front seat adjuster assembly LH*1 or RH*2.

      Click here

    2. Inspect the front seat adjuster assembly LH*1 or RH*2.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT ADJUSTER ASSEMBLY Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - REAR LIFTER MOTOR)


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the W19*1 or W6*2 front power seat switch LH*1 or RH*2 connector.

    2. Disconnect the W16*1 or W3*2 front seat adjuster assembly LH*1 or RH*2 connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W19-10 (LFT+) - W16-1 Always Below 1 Ω
      W19-10 (LFT+) or W16-1 - Body ground Always 10 kΩ or higher
      W19-12 (LFT-) - W16-4 Always Below 1 Ω
      W19-12 (LFT-) or W16-4 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W6-10 (LFT+) - W3-1 Always Below 1 Ω
      W6-10 (LFT+) or W3-1 - Body ground Always 10 kΩ or higher
      W6-12 (LFT-) - W3-4 Always Below 1 Ω
      W6-12 (LFT-) or W3-4 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR