REAR POWER SEAT CONTROL SYSTEM(for Second Row) Folding Motor Circuit

DESCRIPTION

Tech Tips


  • The rear power seat switch is a collective term for the rear power seat switch RH and the rear power seat switch LH.

  • The rear seatback frame sub-assembly is a collective term for the rear seatback frame sub-assembly RH and the rear seatback frame sub-assembly LH.

The fold seat control ECU receives switch operation signals from the rear power seat switch and fold seat switch assembly and operates the fold motor according to the received signal. While the fold motor is operating, its built-in Hall IC detects the position of the rear seatback and sends a fold motor position sensor signal to the fold seat control ECU. The fold seat control ECU uses the Hall IC to detect abnormalities, such as if the rear seatback is jammed.

WIRING DIAGRAM

A01RBHOE06

PROCEDURE


  1. INSPECT REAR SEATBACK FRAME SUB-ASSEMBLY (FOLD MOTOR)


    1. Remove the rear seatback frame sub-assembly.


    2. Inspect the rear seatback frame sub-assembly (fold motor).


      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEATBACK FRAME SUB-ASSEMBLY for Rear LH Seat: Click here
    REPLACE REAR SEATBACK FRAME SUB-ASSEMBLY for Rear RH Seat: Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - FOLD MOTOR)


    1. Disconnect the x3*1 or y3*2 and x4*1 or y4*2 fold seat control ECU connectors.


      • *1: for Rear RH Seat

      • *2: for Rear LH Seat

    2. Disconnect the x2*1 or y1*2 fold motor connector.


      • *1: for Rear RH Seat

      • *2: for Rear LH Seat

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

      Standard Resistance
      for Rear RH Seat
      Tester Connection Condition Specified Condition
      x3-11 (SV1) - x2-5 (HLV) Always Below 1 Ω
      x3-11 (SV1) or x2-5 (HLV) - Body ground Always 10 kΩ or higher
      x3-10 (SFLD) - x2-2 (HLS) Always Below 1 Ω
      x3-10 (SFLD) or x2-2 (HLS) - Body ground Always 10 kΩ or higher
      x3-8 (SG1) - x2-6 (HLG) Always Below 1 Ω
      x3-8 (SG1) or x2-6 (HLG) - Body ground Always 10 kΩ or higher
      x4-4 (FLD+) - x2-3 (FWD) Always Below 1 Ω
      x4-4 (FLD+) or x2-3 (FWD) - Body ground Always 10 kΩ or higher
      x4-8 (FLD-) - x2-4 (BACK) Always Below 1 Ω
      x4-8 (FLD-) or x2-4 (BACK) - Body ground Always 10 kΩ or higher
      for Rear LH Seat
      Tester Connection Condition Specified Condition
      y3-11 (SV1) - y1-5 (HLV) Always Below 1 Ω
      y3-11 (SV1) or y1-5 (HLV) - Body ground Always 10 kΩ or higher
      y3-10 (SFLD) - y1-2 (HLS) Always Below 1 Ω
      y3-10 (SFLD) or y1-2 (HLS) - Body ground Always 10 kΩ or higher
      y3-8 (SG1) - y1-6 (HLG) Always Below 1 Ω
      y3-8 (SG1) or y1-6 (HLG) - Body ground Always 10 kΩ or higher
      y4-4 (FLD+) - y1-3 (FWD) Always Below 1 Ω
      y4-4 (FLD+) or y1-3 (FWD) - Body ground Always 10 kΩ or higher
      y4-8 (FLD-) - y1-4 (BACK) Always Below 1 Ω
      y4-8 (FLD-) or y1-4 (BACK) - Body ground Always 10 kΩ or higher
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK REAR SEATBACK FRAME SUB-ASSEMBLY (POSITION SENSOR)


    1. Temporarily replace the rear seatback frame sub-assembly with a new or known good one.


    2. Check the operation of the rear power seat.

      Click here

      Result
      Result
      OK
      NG

    OK

    END (REAR SEATBACK FRAME SUB-ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE FOLD SEAT CONTROL ECU for Rear LH Seat: Click here
    REPLACE FOLD SEAT CONTROL ECU for Rear RH Seat: Click here