REAR POWER SEAT CONTROL SYSTEM Fold Seat Switch Circuit

DESCRIPTION

When the fold seat switch is operated, a switch operation signal is sent to the fold seat control ECU. The ECU receives switch operation signals from each switch and activates the reclining motor and cushion motor.

WIRING DIAGRAM

B002JDQE02

PROCEDURE


  1. CHECK FOLD SEAT CONTROL ECU (FOLD SEAT SWITCH SIGNAL)


    1. B002JG7C18
      *A Rear Right Seat
      *B Rear Left Seat
      *a Component with harness connected (Fold Seat Control ECU)

      Check the No. 1 fold seat switch signal.


      1. Remove the fold seat control ECU with its connectors still connected.

        Click here

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

        Standard Voltage
        Rear Right Seat
        Tester Connection Condition Specified Condition
        h3-14 (FLD2) - Body ground Fold switch of No. 1 fold seat switch (for Rear Right Switch) off → on 11 to 14 V → Below 1 V
        h3-13 (RTN2) - Body ground Return switch of No. 1 fold seat switch (for Rear Right Switch) off → on 11 to 14 V → Below 1 V
        Rear Left Seat
        Tester Connection Condition Specified Condition
        i3-14 (FLD2) - Body ground Fold switch of No. 1 fold seat switch (for Rear Left Switch) off → on 11 to 14 V → Below 1 V
        i3-13 (RTN2) - Body ground Return switch of No. 1 fold seat switch (for Rear Left Switch) off → on 11 to 14 V → Below 1 V
    2. B002JG7C17
      *A Rear Right Seat
      *B Rear Left Seat
      *a Component with harness connected (Fold Seat Control ECU)

      Check No. 2 fold seat switch signal.


      1. Remove the fold seat control ECU with its connectors still connected.

        Click here

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

        Standard Voltage
        Rear Right Seat
        Tester Connection Condition Specified Condition
        h3-26 (FOLD) - Body ground Fold switch of No. 2 fold seat switch (for Rear Right Switch) off → on 11 to 14 V → Below 1 V
        h3-25 (RTRN) - Body ground Return switch of No. 2 fold seat switch (for Rear Right Switch) off → on 11 to 14 V → Below 1 V
        Rear Left Seat
        Tester Connection Condition Specified Condition
        i3-26 (FOLD) - Body ground Fold switch of No. 2 fold seat switch (for Rear Left Switch) off → on 11 to 14 V → Below 1 V
        i3-25 (RTRN) - Body ground Return switch of No. 2 fold seat switch (for Rear Left Switch) off → on 11 to 14 V → Below 1 V
        Result
        Result Proceed to
        OK A
        NG (No. 1 fold seat switch) B
        NG (No. 2 fold seat switch) C

    A

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    C

    INSPECT NO. 2 FOLD SEAT SWITCH ASSEMBLY Click here

    B

  2. INSPECT NO. 1 FOLD SEAT SWITCH ASSEMBLY


    1. Remove the No. 1 fold seat switch assembly.

      Click here

    2. Inspect the No. 1 fold seat switch assembly.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPLACE NO. 1 FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 1 FOLD SEAT SWITCH ASSEMBLY - FOLD SEAT CONTROL ECU AND BODY GROUND)


    1. Disconnect the I17 No. 1 fold seat switch assembly connector.

    2. Disconnect the h3*1 or i3*2 ECU connector.


      • *1: Rear Right Seat

      • *2: Rear Left Seat

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

      Standard Resistance
      Rear Right Seat
      Tester Connection Condition Specified Condition
      I17-6 (HFSR) - h3-14 (FLD2) Always Below 1 Ω
      I17-6 (HFSR) or h3-14 (FLD2) - Body ground Always 10 kΩ or higher
      I17-1 (HRSR) - h3-13 (RTN2) Always Below 1 Ω
      I17-1 (HRSR) or h3-13 (RTN2) - Body ground Always 10 kΩ or higher
      I17-7 (E) - Body ground Always Below 1 Ω
      Rear Left Seat
      Tester Connection Condition Specified Condition
      I17-8 (HFSL) - i3-14 (FLD2) Always Below 1 Ω
      I17-8 (HFSL) or i3-14 (FLD2) - Body ground Always 10 kΩ or higher
      I17-3 (HRSL) - i3-13 (RTN2) Always Below 1 Ω
      I17-3 (HRSL) or i3-13 (RTN2) - Body ground Always 10 kΩ or higher
      I17-7 (E) - Body ground Always Below 1 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT NO. 2 FOLD SEAT SWITCH ASSEMBLY


    1. Remove the No. 2 fold seat switch assembly.

      Click here

    2. Inspect the No. 2 fold seat switch assembly.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPLACE NO. 2 FOLD SEAT SWITCH ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (NO. 2 FOLD SEAT SWITCH ASSEMBLY - FOLD SEAT CONTROL ECU AND BODY GROUND)


    1. Disconnect the P16 No. 2 fold seat switch assembly connector.

    2. Disconnect the h3*1 or i3*2 fold seat control ECU connector.


      • *1: Rear Right Seat

      • *2: Rear Left Seat

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

      Standard Resistance
      Rear Right Seat
      Tester Connection Condition Specified Condition
      P16-6 (FOLD) - h3-26 (FOLD) Always Below 1 Ω
      P16-6 (FOLD) or h3-26 (FOLD) - Body ground Always 10 kΩ or higher
      P16-1 (RTRN) - h3-25 (RTRN) Always Below 1 Ω
      P16-1 (RTRN) or h3-25 (RTRN) - Body ground Always 10 kΩ or higher
      P16-7 (E) - Body ground Always Below 1 Ω
      Rear Left Seat
      Tester Connection Condition Specified Condition
      P16-8 (FOLD) - i3-26 (FOLD) Always Below 1 Ω
      P16-8 (FOLD) or i3-26 (FOLD) - Body ground Always 10 kΩ or higher
      P16-3 (RTRN) - i3-25 (RTRN) Always Below 1 Ω
      P16-3 (RTRN) or i3-25 (RTRN) - Body ground Always 10 kΩ or higher
      P16-7 (E) - Body ground Always Below 1 Ω
      Result
      Result
      OK
      NG

    OK

    REPLACE FOLD SEAT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR