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

A01DUN0E01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT SEAT LEG ASSEMBLY


    1. A01DRIUE01

      for LH Side:


      1. Remove the No. 3 seat leg assembly LH Click here.

      2. Check if the No. 3 seat leg moves smoothly when the battery is connected to the cushion motor connector terminals.

    2. for RH Side:


      1. Remove the rear No. 2 seat assembly Click here.

      2. Check if the No. 2 seat leg moves smoothly when the battery is connected to the cushion motor connector terminals.

        OK
        Measurement Condition Specified Condition

        Battery positive (+) → 3 (FWD)

        Battery negative (-) → 4 (BACK)

        		 Forward

        Battery positive (+) → 4 (BACK)

        Battery negative (-) → 3 (FWD)

        		 Backward
        Result
        Result Proceed to
        OK (for LH Side) A
        OK (for RH Side) B
        NG (for LH Side) C
        NG (for RH Side) D

    B

    CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 2 SEAT LEG) Click here

    C

    REPLACE NO. 3 SEAT LEG ASSEMBLY LH Click here

    D

    REPLACE NO. 2 SEAT LEG ASSEMBLY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 3 SEAT LEG)


    1. Disconnect the d2 and d1 ECU connectors.

    2. Disconnect the d4 No. 3 seat leg connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      d1-17 (SV1) - d4-5 (HLV) Always Below 1 Ω
      d1-17 (SV1) - Body ground Always 10 kΩ or higher
      d1-18 (SFLD) - d4-2 (HLS) Always Below 1 Ω
      d1-18 (SFLD) - Body ground Always 10 kΩ or higher
      d1-25 (SG1) - d4-6 (HLG) Always Below 1 Ω
      d1-25 (SG1) - Body ground Always 10 kΩ or higher
      d2-8 (FLD+) - d4-3 (FWD) Always Below 1 Ω
      d2-8 (FLD+) - Body ground Always 10 kΩ or higher
      d2-7 (FLD-) - d4-4 (BACK) Always Below 1 Ω
      d2-7 (FLD-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK FOLD SEAT CONTROL ECU LH


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

    2. A01DUBAE17
      Text in Illustration
      *a

      Component with harness connected

      (Fold Seat Control ECU LH)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      d1-17 (SV1) - d1-25 (SG1) Ignition switch off Below 1 V
      Ignition switch ON 5.5 to 8 V
      d1-18 (SFLD) - d1-25 (SG1) Motor is operating Pulse generation
      d2-8 (FLD+) - Body ground No. 1 or No. 2 fold seat switch LH fold 11 to 14 V
      d2-7 (FLD-) - Body ground No. 1 or No. 2 fold seat switch LH return 11 to 14 V

    NG

    REPLACE NO. 3 SEAT LEG ASSEMBLY LH Click here

    OK

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

  4. CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - NO. 2 SEAT LEG)


    1. Disconnect the c2 and c1 ECU connectors.

    2. Disconnect the c4 No. 2 seat leg connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      c1-17 (SV1) - c4-5 (HLV) Always Below 1 Ω
      c1-17 (SV1) - Body ground Always 10 kΩ or higher
      c1-18 (SFLD) - c4-2 (HLS) Always Below 1 Ω
      c1-18 (SFLD) - Body ground Always 10 kΩ or higher
      c1-25 (SG1) - c4-6 (HLG) Always Below 1 Ω
      c1-25 (SG1) - Body ground Always 10 kΩ or higher
      c2-8 (FLD+) - c4-3 (FWD) Always Below 1 Ω
      c2-8 (FLD+) - Body ground Always 10 kΩ or higher
      c2-7 (FLD-) - c4-4 (BACK) Always Below 1 Ω
      c2-7 (FLD-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK FOLD SEAT CONTROL ECU RH


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

    2. A01DUBAE20
      Text in Illustration
      *a

      Component with harness connected

      (Fold Seat Control ECU RH)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      c1-17 (SV1) - c1-25 (SG1) Ignition switch off Below 1 V
      Ignition switch ON 5.5 to 8 V
      c1-18 (SFLD) - c1-25 (SG1) Motor is operating Pulse generation
      c2-8 (FLD+) - Body ground No. 1 or No. 2 fold seat switch RH fold 11 to 14 V
      c2-7 (FLD-) - Body ground No. 1 or No. 2 fold seat switch RH return 11 to 14 V

    NG

    REPLACE NO. 2 SEAT LEG ASSEMBLY Click here

    OK

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