REAR POWER SEAT CONTROL SYSTEM Folding Motor Circuit

DESCRIPTION

The fold seat control ECU receives switch operation signals from the No. 1 and No. 2 fold seat switches and activates the power seat motors. At this time, the Hall IC detects the actuation of the seat cushion and sends a seat cushion actuation signal to the fold seat control ECU. The fold seat control ECU uses signals from the Hall IC to detect if an object is caught or if any other abnormal condition has occurred.

WIRING DIAGRAM

B002KQWE02

PROCEDURE


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


    1. Remove the rear seatback frame sub-assembly.

      Click here

    2. Inspect the rear seatback frame sub-assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEATBACK FRAME SUB-ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - REAR SEATBACK FRAME SUB-ASSEMBLY)


    1. Rear Right Seat:


      1. Disconnect the h3 and h4 fold seat control ECU (rear right seat) connectors.

      2. Disconnect the h2 rear seatback frame sub-assembly RH connector.

    2. Rear Left Seat:


      1. Disconnect the i3 and i4 fold seat control ECU (rear left seat) connectors.

      2. Disconnect the i1 rear seatback frame sub-assembly LH connector.

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

      Standard Resistance
      Rear Right Seat
      Tester Connection Condition Specified Condition
      h3-11 (SV1) - h2-5 (HLV) Always Below 1 Ω
      h3-11 (SV1) or h2-5 (HLV) - Body ground Always 10 kΩ or higher
      h3-10 (SFLD) - h2-2 (HLS) Always Below 1 Ω
      h3-10 (SFLD) or h2-2 (HLS) - Body ground Always 10 kΩ or higher
      h3-8 (SG1) - h2-6 (HLG) Always Below 1 Ω
      h3-8 (SG1) or h2-6 (HLG) - Body ground Always 10 kΩ or higher
      h4-4 (FLD+) - h2-3 (FWD) Always Below 1 Ω
      h4-4 (FLD+) or h2-3 (FWD) - Body ground Always 10 kΩ or higher
      h4-8 (FLD-) - h2-4 (BACK) Always Below 1 Ω
      h4-8 (FLD-) or h2-4 (BACK) - Body ground Always 10 kΩ or higher
      Rear Left Seat
      Tester Connection Condition Specified Condition
      i3-11 (SV1) - i1-5 (HLV) Always Below 1 Ω
      i3-11 (SV1) or i1-5 (HLV) - Body ground Always 10 kΩ or higher
      i3-10 (SFLD) - i2-2 (HLS) Always Below 1 Ω
      i3-10 (SFLD) or i2-2 (HLS) - Body ground Always 10 kΩ or higher
      i3-8 (SG1) - i1-6 (HLG) Always Below 1 Ω
      i3-8 (SG1) or i1-6 (HLG) - Body ground Always 10 kΩ or higher
      i4-4 (FLD+) - i1-3 (FWD) Always Below 1 Ω
      i4-4 (FLD+) or i1-3 (FWD) - Body ground Always 10 kΩ or higher
      i4-8 (FLD-) - i1-4 (BACK) Always Below 1 Ω
      i4-8 (FLD-) or i1-4 (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 (SENSOR)


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

      Click here

    2. Check the rear power seat system.

      Result
      Result
      OK
      NG

    OK

    END (REAR SEATBACK FRAME SUB-ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE FOLD SEAT CONTROL ECU Click here